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T. Rowe Price Institutional Income Funds, Inc., et al. – ‘485BPOS’ on 9/23/15

On:  Wednesday, 9/23/15, at 8:09am ET   ·   Effective:  10/1/15   ·   Accession #:  1169187-15-8   ·   File #s:  333-84634, 811-21055

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  As Of                Filer                Filing    For·On·As Docs:Size

 9/23/15  T Rowe Price Inst’l Income F… Inc 485BPOS    10/01/15   14:18M
          → T. Rowe Price Institutional Core Plus Fund ⇒ T. Rowe Price Institutional Core Plus Fund (TICPX) — T. Rowe Price Institutional Core Plus Fund-F Class (PFCPX)
          → T. Rowe Price Institutional Credit Opportunities Fund ⇒ TRXPX
          → T. Rowe Price Institutional Floating Rate Fund ⇒ 2 Classes/Contracts
          → T. Rowe Price Institutional Global Multi-Sector Bond Fund ⇒ RPGMX
          → T. Rowe Price Institutional High Yield Fund ⇒ TRHYX
          → T. Rowe Price Institutional Long Duration Credit Fund ⇒ RPLCX

Document/Exhibit                   Description                      Pages   Size 

 1: 485BPOS     Post-Effective Amendment                            HTML   3.93M 
 2: EX-99.G CUST AGREEMT  Miscellaneous Exhibit                     HTML    853K 
 3: EX-99.G CUST AGREEMT  Miscellaneous Exhibit                     HTML   1.08M 
 4: EX-99.H OTH MAT CONT  Miscellaneous Exhibit                     HTML    142K 
 5: EX-99.H OTH MAT CONT  Miscellaneous Exhibit                     HTML    191K 
 6: EX-99.H OTH MAT CONT  Miscellaneous Exhibit                     HTML     83K 
 7: EX-99.H OTH MAT CONT  Miscellaneous Exhibit                     HTML    194K 
 8: EX-99.H OTH MAT CONT  Miscellaneous Exhibit                     HTML     55K 
 9: EX-99.H OTH MAT CONT  Miscellaneous Exhibit                     HTML    118K 
10: EX-99.H OTH MAT CONT  Miscellaneous Exhibit                     HTML    301K 
11: EX-99.J OTHER OPININ  Miscellaneous Exhibit                     HTML      7K 
12: EX-99.J OTHER OPININ  Miscellaneous Exhibit                     HTML      7K 
13: EX-99.J OTHER OPININ  Miscellaneous Exhibit                     HTML     21K 
14: EX-99.P CODE ETH  Miscellaneous Exhibit                         HTML    119K 

Registration Nos. 333-84634/811-21055

UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
WASHINGTON, DC 20549
FORM N-1A

REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933   /X/

 Post-Effective Amendment No. 36     /X/

and/or

REGISTRATION STATEMENT UNDER THE INVESTMENT COMPANY ACT OF 1940 /X/

 Amendment No. 36      /X/

T. ROWE PRICE INSTITUTIONAL INCOME FUNDS, INC.

Exact Name of Registrant as Specified in Charter

100 East Pratt Street, Baltimore, Maryland 21202
Address of Principal Executive Offices

410-345-2000
Registrant’s Telephone Number, Including Area Code

David Oestreicher

100 East Pratt Street, Baltimore, Maryland 21202
Name and Address of Agent for Service

Approximate Date of Proposed Public Offering October 1, 2015

 It is proposed that this filing will become effective (check appropriate box):

// Immediately upon filing pursuant to paragraph (b)

// On October 1, 2015 pursuant to paragraph (b)

// 60 days after filing pursuant to paragraph (a)(1)

// On (date) pursuant to paragraph (a)(1)

// 75 days after filing pursuant to paragraph (a)(2)

/X/ On (date) pursuant to paragraph (a)(2) of Rule 485

 If appropriate, check the following box:

// This post-effective amendment designates a new effective date for a previously filed post-effective amendment.

Table of Contents

SUMMARY

Investment Objective

The fund seeks to maximize total return through income and capital appreciation.

Fees and Expenses

This table describes the fees and expenses that you may pay if you buy and hold shares of the fund.

Fees and Expenses of the Fund

a The figures shown in the fee table do not match the “Ratio of expenses to average net assets” shown in the Financial Highlights table, as that figure does not include acquired fund fees and expenses and excludes expenses permanently waived as a result of investments in other T. Rowe Price mutual funds.

b T. Rowe Price Associates, Inc. is required to permanently waive a portion of its management fee charged to the fund in an amount sufficient to fully offset any acquired fund fees and expenses related to investments in other T. Rowe Price mutual funds. The amount of the waiver will vary each fiscal year in proportion to the amount invested in other T. Rowe Price mutual funds. The T. Rowe Price funds would be required to seek regulatory approval in order to terminate this arrangement.

Example This example is intended to help you compare the cost of investing in the fund with the cost of investing in other mutual funds. The example assumes that you invest $10,000 in the fund for the time periods indicated and then redeem all of your shares at the end of those periods. The example also assumes that your investment has a 5% return each year and that the fund’s operating expenses remain the same. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Portfolio Turnover The fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the example, affect the fund’s performance. During the most recent fiscal year, the fund’s portfolio turnover rate was 149.9% of the average value of its portfolio.

Investments, Risks, and Performance

Principal Investment Strategies The fund intends to invest at least 65% of its net assets (including any borrowings for investment purposes) in a “core” portfolio of investment grade, U.S. dollar-denominated fixed income securities that may include, but are not limited to, debt securities issued by the U.S. government and its agencies, corporate bonds, and mortgage-backed and asset-backed securities. Normally, the fund will also maintain a “plus” portion of its portfolio in other sectors of the bond market, including high yield, non-U.S. dollar-denominated, and emerging market securities, to seek additional returns.

Under normal conditions, the fund expects to maintain an effective duration (which measures the portfolio’s price sensitivity to interest rate changes) within +/-20% of the Barclays U.S. Aggregate Bond Index. As of July 31, 2015, the effective duration of this index was 5.50 years; however, it will change over time.

Individual bond investments in the core portfolio will be rated investment grade, with a minimum credit quality of BBB- (or an equivalent rating). Ratings will be determined, at the time of purchase, by at least one credit rating agency or, if not so rated, a comparable rating by T. Rowe Price. If a security is split-rated (i.e., at least one below investment grade rating and at least one investment grade rating), the higher rating will be used. The fund, in the aggregate, will seek to maintain a weighted average credit rating of A- or better, based on the weighted average credit quality of the fund’s portfolio securities.

The plus portion of the fund’s portfolio may consist of below investment-grade bonds, also known as “junk” bonds, issued by companies in the U.S. and other developed countries (not to exceed 20% of the fund’s net assets), below investment-grade emerging market debt securities (not to exceed 10% of the fund’s net assets), non-U.S. dollar-denominated securities (not to exceed 20% of the fund’s net assets), and convertible and preferred securities (not to exceed 10% of the fund’s net assets), as well as other investments. The fund may invest in currencies without holding any bonds or other securities denominated in those particular currencies.

The fund may continue to hold an investment in its core portfolio that is downgraded to below investment grade after purchase. If such rating downgrades cause high yield exposure to exceed 20% of net assets or below investment-grade emerging market securities to exceed 10% of net assets, the fund will seek to reduce its exposure within a reasonable period of time.

While most assets will typically be invested in bonds, the fund also uses interest rate futures and forward currency exchange contracts in keeping with the fund’s objectives. Interest rate futures would typically be used to manage the fund’s exposure to interest rate changes or to adjust portfolio duration. Forward currency exchange contracts would be used to gain exposure to certain currencies expected to increase or decrease in value relative to other currencies or to protect the fund’s foreign bond holdings from adverse currency movements relative to the U.S. dollar.

The fund may sell holdings for a variety of reasons, such as to adjust the portfolio’s average maturity, duration, or credit quality or to shift assets into and out of higher-yielding or lower-yielding securities or different sectors.

Principal Risks As with any mutual fund, there is no guarantee that the fund will achieve its objective. The fund’s share price fluctuates, which means you could lose money by investing in the fund. The principal risks of investing in this fund are summarized as follows:

Active management risk The fund is subject to the risk that the investment adviser’s judgments about the attractiveness, value, or potential appreciation of the fund’s investments may prove to be incorrect. If the investments selected and strategies employed by the fund fail to produce the intended results, the fund could underperform other funds with similar objectives and investment strategies.

Fixed income markets risk Economic and other market developments can adversely affect fixed income securities markets. At times, participants in these markets may develop concerns about the ability of certain issuers of debt securities to make timely principal and interest payments, or they may develop concerns about the ability of financial institutions that make markets in certain debt securities to facilitate an orderly market. Those concerns could cause increased volatility and reduced liquidity in particular securities or in the overall fixed income markets and the related derivatives markets. A lack of liquidity or other adverse credit market conditions may hamper the fund’s ability to sell the debt securities in which it invests or to find and purchase suitable debt instruments.

Interest rate risk This is the risk that a rise in interest rates will cause the price of a fixed rate debt security to fall. Generally, securities with longer maturities or durations and funds with longer weighted average maturities or durations carry greater interest rate risk. The fund may be subject to a greater risk of rising interest rates due to the current period of historically low rates and the effect of potential government fiscal policy initiatives and resulting market reaction to those initiatives.

Credit risk This is the risk that an issuer of a debt security could suffer an adverse change in financial condition that results in a payment default, security downgrade, or inability to meet a financial obligation. The fund’s exposure to credit risk is increased to the extent the fund invests in noninvestment-grade “junk” bonds. Junk bonds should be considered speculative as they carry greater risk of default and erratic price swings due to adverse changes in the credit quality of the issuer.

Liquidity risk This is the risk that the fund may not be able to sell a holding in a timely manner at a desired price. Reduced liquidity in the bond markets can result from a number of events, such as significant trading activity, reductions in bond inventory, and rapid or unexpected changes in interest rates. Less liquid markets could lead to greater price volatility and limit the fund’s ability to sell a holding at a suitable price.

Foreign investing risk This is the risk that the fund’s investments in foreign securities may be adversely affected by local, political, social, and economic conditions overseas, greater volatility, reduced liquidity, or decreases in foreign currency values relative to the U.S. dollar.

Emerging markets risk The risks of foreign investing are heightened for securities of issuers in emerging market countries. Emerging market countries tend to have economic structures that are less diverse and mature, and political systems that are less stable, than those of developed countries. In addition to all of the risks of investing in foreign developed markets, emerging markets are more susceptible to governmental interference, local taxes being imposed on foreign investments, restrictions on gaining access to sales proceeds, and less liquid and less efficient trading markets.

Currency risk Because the fund may invest in securities issued in foreign currencies, the fund is subject to the risk that it could experience losses based solely on the weakness of foreign currencies versus the U.S. dollar and changes in the exchange rates between such currencies and the U.S. dollar. Any attempts at currency hedging may not be successful and could cause the fund to lose money.

Prepayment risk and extension risk Prepayment risk is the risk that the principal on mortgage-backed securities, other asset-backed securities or any debt security with an embedded call option may be prepaid at any time, which could reduce the security’s yield and market value. The rate of prepayments tends to increase as interest rates fall, which could cause the average maturity of the portfolio to shorten. Extension risk may result from a rise in interest rates, which tends to make mortgage-backed securities, asset-backed securities, and other callable debt securities more volatile.

Convertible securities and preferred stock risk Investments in convertible securities and preferred stocks subject the fund to risks associated with both equity and fixed income securities, depending on the price of the underlying security and the conversion price. Stocks generally fluctuate in value more than bonds and tend to move in cycles, with periods of rising and falling prices. The value of a stock may decline due to general weakness in the stock market or because of factors that affect a particular company or industry. Convertible securities are typically issued by smaller-capitalized companies whose stock prices are more volatile than companies that have access to more conventional means of raising capital. Preferred stock holders would be paid after corporate bondholders, but before common stockholders, in the event a company fails.

Derivatives risk The fund’s use of interest rate futures and forward currency exchange contracts exposes the fund to additional volatility in comparison to investing directly in bonds and other debt securities. These instruments can be illiquid and difficult to value, may involve leverage so that small changes produce disproportionate losses for the fund and, if not traded on an exchange, are subject to the risk that a counterparty to the transaction will fail to meet its obligations under

the derivatives contract. The fund’s principal use of derivatives involves the risk that anticipated interest rate movements and changes in currency values and currency exchange rates will not be accurately predicted, which could significantly harm the fund’s performance.

Performance The bar chart showing calendar year returns and the average annual total returns table provide some indications of the risks of investing in the fund by showing how much returns can differ from year to year and how the fund’s average annual returns for certain periods compare with the returns of a relevant broad-based market index, as well as with the returns of other comparative indexes that have investment characteristics similar to those of the fund. The fund’s performance information represents only past performance (before and after taxes) and is not necessarily an indication of future results.

The fund can also experience short-term performance swings, as shown by the best and worst calendar quarter returns during the years depicted.

The fund’s return for the six months ended 6/30/15 was 0.36%.

In addition, the average annual total returns table shows hypothetical after-tax returns to demonstrate how taxes paid by a shareholder may influence returns. After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. After-tax returns shown are not relevant to investors who hold their fund shares through tax-deferred arrangements, such as a 401(k) account or individual retirement account. In some cases, the figure shown for “returns after taxes on distributions and sale of fund shares” may be higher than the figure shown for “returns before taxes” because the calculations assume the investor received a tax deduction for any loss incurred on the sale of shares.

Updated performance information is available through troweprice.com or may be obtained by calling 1-800-638-8790.

Management

Investment Adviser T. Rowe Price Associates, Inc. (T. Rowe Price)

Purchase and Sale of Fund Shares

The fund generally requires a $1,000,000 minimum initial investment. There is no minimum for subsequent purchases. If you hold shares through a financial intermediary, the intermediary may impose different investment minimums.

You may purchase, redeem, or exchange shares of the fund on any day the New York Stock Exchange is open for business by calling 1-800-638-8790 or by written request. If you hold shares through a financial intermediary, you must purchase, redeem, and exchange shares through your intermediary.

Tax Information

The fund declares dividends daily and pays them on the first business day of each month. Any capital gains are declared and paid annually, usually in December. Redemptions or exchanges of fund shares and distributions by the fund, whether or not you reinvest these amounts in additional fund shares, may be taxed as ordinary income or capital gains unless you invest through a tax-deferred account (although you may be taxed upon withdrawal from such account).

The following policies and procedures generally apply to the T. Rowe Price Institutional Funds (other than their F Class shares).

How and When Shares Are Priced

The share price, also called the “net asset value,” for each share class of a fund is calculated at the close of the New York Stock Exchange (normally 4 p.m. ET) each day that the exchange is open for business. To calculate the net asset value, the fund’s assets are valued and totaled; liabilities are subtracted; and each class’ proportionate share of the balance, called net assets, is divided by the number of shares outstanding. Market values are used to price portfolio holdings for which market quotations are readily available. Market values generally reflect the prices at which securities actually trade or represent prices that have been adjusted based on evaluations and information provided by the fund’s pricing services. If a market value for a security is not available or normal valuation procedures are deemed to be inappropriate, the fund will make a good faith effort to assign a fair value to the security by taking into account various factors and methodologies that have been approved by the fund’s Board of Directors. This value may differ from the value the fund receives upon sale of the securities. Amortized cost is used to price securities held by money funds and certain other debt securities held by a fund. Investments in other mutual funds are valued at the closing net asset value per share of the mutual fund on the day of valuation.

Non-U.S. equity securities are valued on the basis of their most recent closing market prices at 4 p.m. ET, except under the circumstances described below. Most foreign markets close before 4 p.m. ET. For example, the most recent closing prices for securities traded in certain Asian markets may be as much as 15 hours old at 4 p.m. ET. If a fund determines that developments between the close of a foreign market and the close of the New York Stock Exchange will, in its judgment, materially affect the value of some or all of the fund’s securities, the fund will adjust the previous closing prices to reflect what it believes to be the fair value of the securities as of 4 p.m. ET. In deciding whether to make these adjustments, the fund reviews a variety of factors, including developments in foreign markets, the performance of U.S. securities markets, and the performance of instruments trading in U.S. markets that represent foreign securities and baskets of foreign securities. The fund may also fair value certain securities or a group of securities in other situations—for example, when a particular foreign market is closed but the fund is open. For a fund that has investments in securities that are primarily listed on foreign exchanges that trade on weekends or other days when the fund does not price its

shares, the fund’s net asset value may change on days when shareholders will not be able to purchase or redeem the fund’s shares.

The fund uses various pricing services to provide it with closing market prices and information used for adjusting those prices and to value most fixed income securities. The fund cannot predict how often it will use closing prices and how often it will adjust those prices. As a means of evaluating its fair value process, the fund routinely compares closing market prices, the next day’s opening prices in the same markets, and adjusted prices. The fund also evaluates a variety of factors when assigning fair values to private placements and other restricted securities. Other mutual funds may adjust the prices of their securities by different amounts or assign different fair values than the fair value that the fund assigns to the same security.

The various ways you can buy, sell, and exchange shares are explained at the end of this prospectus and on the New Account form.

How Your Purchase, Sale, or Exchange Price Is Determined

If your request is received by T. Rowe Price or its agent in correct form by the close of the New York Stock Exchange (normally 4 p.m. ET), your transaction will be priced at that business day’s net asset value. To ensure that your request is submitted in correct form, please refer to “Account Requirements and Transaction Information” in Section 4. If your request is received by T. Rowe Price or its agent after the close of the New York Stock Exchange, your transaction will be priced at the next business day’s net asset value.

The funds generally do not accept orders that request a particular day or price for a transaction or any other special conditions.

Institutional Fund shares may be purchased directly from T. Rowe Price or through various third-party intermediaries including banks, brokers, and investment advisers. Where authorized by a fund, orders will be priced at the net asset value next computed after receipt by the intermediary. Contact your intermediary for trade deadlines and the applicable policies for purchasing, selling, or exchanging your shares, as well as initial and subsequent investment minimums. The intermediary may charge a fee for its services.

When authorized by the fund, certain financial institutions or retirement plans purchasing fund shares on behalf of customers or plan participants through T. Rowe Price Financial Institution Services or T. Rowe Price Retirement Plan Services may place a purchase order unaccompanied by payment. Payment for these shares must be received by the time designated by the fund (not to exceed the period established for settlement under applicable regulations). If payment is not received by this time, the order may be canceled. The financial institution or retirement plan is responsible for any costs or losses incurred by the fund or T. Rowe Price if payment is delayed or not received.

Note: The time at which transactions and shares are priced and the time until which orders are accepted may be changed in case of an emergency or if the New York Stock Exchange closes at a time other than 4 p.m. ET. In the event of an emergency closing, a fund’s shareholders will receive the next share price calculated by the fund. There may be times when you are unable to contact us by telephone or access your account online due to extreme market activity, the unavailability of the T. Rowe Price website, or other circumstances. Should this occur, your order must still be placed and accepted by T. Rowe Price prior to the time the New York Stock Exchange closes to be priced at that business day’s net asset value.

How You Can Receive the Proceeds From a Sale

When filling out the New Account form, you may wish to give your organization the widest range of options for receiving proceeds from a sale.

If your request is received in correct form by T. Rowe Price on a business day prior to the close of the New York Stock Exchange, proceeds are usually sent on the next business day. Proceeds can be mailed to you by check or sent electronically to your bank account by Automated Clearing House transfer or bank wire. Automated Clearing House is an automated method of initiating payments from, and receiving payments in, your financial institution account. Proceeds sent by Automated Clearing House transfer are usually credited to your account the second business day after the sale. Proceeds sent by bank wire are usually credited to your account the next business day after the sale.

Exception: Under certain circumstances, and when deemed to be in a fund’s best interests, your proceeds may not be sent for up to seven calendar days after we receive your redemption request in good order.

If for some reason we cannot accept your request to sell shares, we will attempt to contact you.

Contingent Redemption Fee

Short-term trading can disrupt a fund’s investment program and create additional costs for long-term shareholders. For these reasons, certain T. Rowe Price funds, listed in the following table, assess a fee on redemptions (including exchanges out of a fund), which reduces the proceeds from such redemptions by the amounts indicated:

Redemption fees are paid to a fund to deter short-term trading, offset costs, and protect the fund’s long-term shareholders. Subject to the exceptions described on the following pages, all persons holding shares of a T. Rowe Price fund that imposes a redemption fee are subject to the fee, whether the person is holding shares directly with a T. Rowe Price fund; through a retirement plan for which T. Rowe Price serves as recordkeeper; or indirectly through an intermediary (such as a broker, bank, or investment adviser), recordkeeper for retirement plan participants, or other third party.

Computation of Holding Period

When an investor sells shares of a fund that assesses a redemption fee, T. Rowe Price will use the “first-in, first-out” method to determine the holding period for the shares sold. Under this method, the date of redemption or exchange will be compared with the earliest purchase date of shares held in the account. A redemption fee will be charged on shares sold on or before the end of the required holding period. The day after the date of your purchase is considered Day 1 for purposes of computing the holding period. For example, if you redeem your shares on or before the 90th day from the date of purchase, you will be assessed the redemption fee. If you purchase shares through an intermediary, consult your intermediary to determine how the holding period will be applied.

Transactions Not Subject to Redemption Fees

The T. Rowe Price funds will not assess a redemption fee with respect to certain transactions. As of the date of this prospectus, the following shares of T. Rowe Price funds will not be subject to redemption fees:

· Shares redeemed through an automated, systematic withdrawal plan;

· Shares redeemed through or used to establish certain rebalancing, asset allocation, wrap, and advisory programs, as well as non-T. Rowe Price fund-of-funds products, if approved in writing by T. Rowe Price;

· Shares purchased through the reinvestment of dividends or capital gain distributions;*

· Shares converted from one share class to another share class of the same fund;*

· Shares redeemed automatically by a fund to pay fund fees or shareholder account fees (e.g., for failure to meet account minimums);

· Shares purchased by rollover or changes of account registration within the same fund;*

· Shares redeemed to return an excess contribution from a retirement account;

· Shares of T. Rowe Price funds purchased by another T. Rowe Price fund and shares purchased by discretionary accounts managed by T. Rowe Price or one of its affiliates (please note that other shareholders of the investing T. Rowe Price fund are still subject to the policy);

· Certain transactions in defined benefit and nonqualified plans, subject to prior approval by T. Rowe Price;

· Shares that are redeemed in-kind;

· Shares transferred to T. Rowe Price or a third-party intermediary acting as a service provider when the age of the shares cannot be determined systematically;* and

· Shares redeemed in retirement plans or other products that restrict trading to no more frequently than once per quarter, if approved in writing by T. Rowe Price.

* Subsequent exchanges of these shares into funds that assess redemption fees will subject such shares to the fee.

Redemption Fees on Shares Held in Retirement Plans

If shares are held in a retirement plan, redemption fees generally will be assessed on shares redeemed by exchange only if they were originally purchased by exchange. However, redemption fees may apply to transactions other than exchanges depending on how shares of the plan are held at T. Rowe Price or how the fees are applied by your plan’s recordkeeper. To determine which of your transactions are subject to redemption fees, you should contact T. Rowe Price or your plan recordkeeper.

Omnibus Accounts

If your shares are held through an intermediary in an omnibus account, T. Rowe Price relies on the intermediary to assess the redemption fee on underlying shareholder accounts. T. Rowe Price seeks to enter into agreements with intermediaries establishing omnibus accounts that require the intermediary to assess the redemption fees. There are no assurances that T. Rowe Price will be successful in identifying all intermediaries or that the intermediaries will properly assess the fees.

Certain intermediaries may not apply the exemptions previously listed to the redemption fee policy; all redemptions by persons trading through such intermediaries may be subject to the fee. Certain intermediaries may exempt transactions not listed from redemption fees, if approved by T. Rowe Price. Persons redeeming shares through an intermediary should check with their respective intermediary to determine which transactions are subject to the fees.

Each fund intends to qualify to be treated each year as a regulated investment company under Subchapter M of the Internal Revenue Code of 1986, as amended. In order to qualify, a fund must satisfy certain income, diversification, and distribution requirements. A regulated investment company is not subject to U.S. federal income tax at the portfolio level on income and gains from investments that are distributed to shareholders. However, if a fund were to fail to qualify as a regulated investment company, and was ineligible to or otherwise did not cure such failure, the result would be fund-level taxation and, consequently, a reduction in income available for distribution to the fund’s shareholders.

To the extent possible, all net investment income and realized capital gains are distributed to shareholders.

Dividends and Other Distributions

Dividend and capital gain distributions are reinvested in additional fund shares in your account unless you select another option on your New Account form. Reinvesting distributions results in compounding, which allows you to receive dividends and capital gain distributions on an increasing number of shares.

Distributions not reinvested are paid by check or transmitted to your bank account via Automated Clearing House. If the U.S. Postal Service cannot deliver your check, or if your check remains uncashed for six months, the fund reserves the right to reinvest your distribution check in your account at the net asset value on the day of the reinvestment and to reinvest all subsequent distributions in shares of the fund. Interest will not accrue on amounts represented by uncashed distributions or redemption checks.

The following table provides details on dividend payments:

Bond fund shares will earn dividends through the date of redemption. Shares redeemed on a Friday or prior to a holiday will continue to earn dividends until the next business day. Generally, if you redeem all of your bond fund shares at any time during the month, you will also receive all dividends earned through the date of redemption in the same check. When you redeem only a portion of your bond fund shares, all dividends accrued on those shares will be reinvested, or paid in cash, on

the next dividend payment date. The funds do not pay dividends in fractional cents. Any dividend amount earned for a particular day on all shares held that is one-half of one cent or greater (for example, $0.016) will be rounded up to the next whole cent ($0.02), and any amount that is less than one-half of one cent (for example, $0.014) will be rounded down to the nearest whole cent ($0.01). Please note that, if the dividend payable on all shares held is less than one-half of one cent for a particular day, no dividend will be earned for that day.

If you purchase and sell your shares through an intermediary, consult your intermediary to determine when your shares begin and stop accruing dividends as the information previously described may vary.

Capital Gain Payments

A capital gain or loss is the difference between the purchase and sale price of a security. If a fund has net capital gains for the year (after subtracting any capital losses), they are usually declared and paid in December to shareholders of record on a specified date that month. If a second distribution is necessary, it is paid the following year.

Tax Information

In most cases, you will be provided information for your tax filing needs no later than mid-February.

If you invest in the fund through a tax-deferred account, such as an individual retirement account, you will not be subject to tax on dividends and distributions from the fund or the sale of fund shares if those amounts remain in the tax-deferred account. You may receive a Form 1099-R or other Internal Revenue Service forms, as applicable, if any portion of the account is distributed to you.

If you invest in the fund through a taxable account, you generally will be subject to tax when:

· You sell fund shares, including an exchange from one fund to another.

· The fund makes dividend or capital gain distributions.

For individual shareholders, a portion of ordinary dividends representing “qualified dividend income” received by the fund may be subject to tax at the lower rates applicable to long-term capital gains rather than ordinary income. You may report it as “qualified dividend income” in computing your taxes, provided you have held the fund shares on which the dividend was paid for more than 60 days during the 121-day period beginning 60 days before the ex-dividend date. Ordinary dividends that do not qualify for this lower rate are generally taxable at the investor’s marginal income tax rate. This includes the portion of ordinary dividends derived from interest, short-term capital gains, distributions from nonqualified foreign corporations, and dividends received by the fund from stocks that were on loan. Little, if any, of the ordinary dividends paid by the bond funds is expected to qualify for this lower rate.

For corporate shareholders, a portion of ordinary dividends may be eligible for the 70% deduction for dividends received by corporations to the extent the fund’s income consists of dividends paid by U.S. corporations. Little, if any, of the ordinary dividends paid by the international stock or bond funds is expected to qualify for this deduction.

Taxes on Fund Redemptions

When you sell shares in any fund, you may realize a gain or loss. An exchange from one fund to another in a taxable account is also a sale for tax purposes.

We will make available to you Form 1099-B, if applicable, no later than mid-February, indicating the date and amount of each sale you made in the fund during the prior year. This information will also be reported to the Internal Revenue Service. For most new accounts or those opened by exchange in 1984 or later, we will provide you with the gain or loss on the shares you sold during the year based on the average cost single category method. This information is not reported to the Internal Revenue Service. You may calculate the cost basis using other methods acceptable to the Internal Revenue Service, such as specific identification.

For mutual fund shares acquired after 2011, new tax regulations require us to report the cost basis information to most taxable shareholders and the Internal Revenue Service on Form 1099-B using a cost basis method selected by the shareholder or, in the absence of such selected method, our default method if you acquire your shares directly from us. Our default method is average cost. If you acquire your fund shares through an intermediary after 2011, you should check with your intermediary regarding the applicable cost basis method. You should, however, note that any cost basis information reported to you may not always be the same as what you should report on your tax return because the rules applicable to the determination of cost basis on Form 1099-B may be different from the rules applicable to the determination of cost basis for reporting on your tax return. Therefore, you should save your transaction records to make sure the information reported on your tax return is accurate.

To help you maintain accurate records, we will make available to you a confirmation promptly following each transaction you make (except for systematic purchases and systematic redemptions) and a year-end statement detailing all of your transactions in each fund account during the year.

Taxes on Fund Distributions

We will make available to you, as applicable, no later than mid-February, a Form 1099-DIV, or other Internal Revenue Service forms, as required, indicating the tax status of any income dividends, dividends exempt from federal income taxes, and capital gain distributions made to you. This information will be reported to the Internal Revenue Service. Taxable distributions are generally taxable to you in the year in which they are paid. Your bond fund dividends for each calendar year will include dividends accrued up to the first business day of the next calendar year. You

will be sent any additional information you need to determine your taxes on fund distributions, such as the portion of your dividends, if any, that may be exempt from state and local income taxes.

The tax treatment of a capital gain distribution is determined by how long the fund held the portfolio securities, not how long you held the shares in the fund. Short-term (one year or less) capital gain distributions are taxable at the same rate as ordinary income, and gains on securities held more than one year are taxed at the lower rates applicable to long-term capital gains. If you realized a loss on the sale or exchange of fund shares that you held six months or less, your short-term capital loss must be reclassified as a long-term capital loss to the extent of any long-term capital gain distributions received during the period you held the shares. For funds investing in foreign securities, distributions resulting from the sale of certain foreign currencies, currency contracts, and the foreign currency portion of gains on debt securities are taxed as ordinary income. Net foreign currency losses may cause monthly or quarterly dividends to be reclassified as returns of capital.

The tax status of certain distributions may be recharacterized on year-end tax forms, such as your Form 1099-DIV. Distributions made by a fund may later be recharacterized for federal income tax purposes—for example, from taxable ordinary income dividends to returns of capital, which are generally nontaxable but reduce your tax basis in the fund’s shares. Recharacterization of distributions may occur for a number of reasons, including the recharacterization of income received from underlying investments, such as REITs, and distributions that exceed taxable income due to losses from foreign currency transactions or other investment transactions. Certain funds, including international bond funds and funds that invest in REITs, are more likely to recharacterize a portion of their distributions as a result of their investments.

If the fund qualifies and elects to pass through nonrefundable foreign income taxes paid to foreign governments during the year, your portion of such taxes will be reported to you as taxable income. However, you may be able to claim an offsetting credit or deduction on your tax return for those amounts. There can be no assurance that a fund will meet the requirements to pass through foreign income taxes paid.

Taxable distributions are subject to tax whether reinvested in additional shares or received in cash.

If a fund holds Build America Bonds or other qualified tax credit bonds and elects to pass through the corresponding interest income and any available tax credits, you will need to report both the interest income and any such tax credits as taxable income. You may be able to claim the tax credits on your federal tax return as an offset to your income tax (including alternative minimum tax) liability, but the tax credits generally are not refundable. There is no assurance, however, that a fund will elect to pass through the income and credits.

Tax Consequences of Hedging

Entering into certain transactions involving options, futures, swaps, and forward currency exchange contracts may result in the application of the mark-to-market and straddle provisions of the Internal Revenue Code. These provisions could result in a fund being required to distribute gains on such transactions even though it did not close the contracts during the year or receive cash to pay such distributions. The fund may not be able to reduce its distributions for losses on such transactions to the extent of unrealized gains in offsetting positions.

Tax Consequences of Shareholder Turnover

If the fund’s portfolio transactions result in a net capital loss (i.e., an excess of capital losses over capital gains) for any year, the loss may be carried forward and used to offset future realized capital gains. However, its ability to carry forward such losses will be limited if the fund experiences an “ownership change” within the meaning of the Internal Revenue Code. An ownership change generally results when shareholders owning 5% or more of the fund increase their aggregate holdings by more than 50 percentage points over a three-year period.

Because Institutional Funds may have only a few large shareholders, an ownership change can occur in the normal course of shareholder purchases and redemptions. The fund undertakes no obligation to avoid or prevent an ownership change. Moreover, because of circumstances beyond the fund’s control, there can be no assurance that the fund will not experience, or has not already experienced, an ownership change. An ownership change can reduce the fund’s ability to offset capital gains with losses, which could increase the amount of taxable gains that could be distributed to shareholders.

Tax Effect of Buying Shares Before an Income Dividend or Capital Gain Distribution

If you buy shares shortly before or on the record date—the date that establishes you as the person to receive the upcoming distribution—you may receive a portion of the money you just invested in the form of a taxable distribution. Therefore, you may wish to find out a fund’s record date before investing. In addition, a fund’s share price may, at any time, reflect undistributed capital gains or income and unrealized appreciation, which may result in future taxable distributions. Such distributions can occur even in a year when the fund has a negative return.

Following these procedures helps assure timely and accurate transactions.

Purchase Conditions

Nonpayment Purchases of a fund may be canceled if payment is not received in a timely manner, and the shareholder may be responsible for any losses or expenses

incurred by the fund or its transfer agent. The funds and their agents have the right to reject or cancel any purchase, exchange, or redemption due to nonpayment.

U.S. Dollars All purchases must be paid for in U.S. dollars; checks must be drawn on U.S. banks.

Large Sale (Redemption) Conditions Large redemptions can adversely affect a portfolio manager’s ability to implement a fund’s investment strategy by causing the premature sale of securities that would otherwise be held longer. Therefore, the fund reserves the right (without prior notice) to pay all or part of redemption proceeds with securities from the fund’s portfolio rather than in cash (“redemption in-kind”). If this occurs, the securities will be selected by the fund in its absolute discretion, and the redeeming shareholder or account will be responsible for disposing of the securities and bearing any associated costs and risks (for example, market risks until the securities are disposed of).

We also request that you give us three business days’ notice for any redemption of $2 million or more.

Excessive and Short-Term Trading Policy

Excessive transactions and short-term trading can be harmful to fund shareholders in various ways, such as disrupting a fund’s portfolio management strategies, increasing a fund’s trading costs, and negatively affecting its performance. Short-term traders in funds that invest in foreign securities may seek to take advantage of developments overseas that could lead to an anticipated difference between the price of the funds’ shares and price movements in foreign markets. While there is no assurance that T. Rowe Price can prevent all excessive and short-term trading, the Boards of Directors/Trustees of the T. Rowe Price funds have adopted the following trading limits that are designed to deter such activity and protect the funds’ shareholders. The funds may revise their trading limits and procedures at any time as the Boards of Directors/Trustees deem necessary or appropriate to better detect short-term trading that may adversely affect the funds, to comply with applicable regulatory requirements, or to impose additional or alternative restrictions.

Subject to certain exceptions, each T. Rowe Price fund restricts a shareholder’s purchases (including through exchanges) into a fund account for a period of 30 calendar days after the shareholder has redeemed or exchanged out of that same fund account (the “30-Day Purchase Block”). The calendar day after the date of redemption is considered Day 1 for purposes of computing the period before another purchase may be made.

General Exceptions As of the date of this prospectus, the following types of transactions generally are not subject to the 30-Day Purchase Block:

· Shares purchased or redeemed in money funds;

· Shares purchased or redeemed through a systematic purchase or withdrawal plan;

· Checkwriting redemptions from bond and money funds;

· Shares purchased through the reinvestment of dividends or capital gain distributions;

· Shares redeemed automatically by a fund to pay fund fees or shareholder account fees;

· Transfers and changes of account registration within the same fund;

· Shares purchased by asset transfer or direct rollover;

· Shares purchased or redeemed through IRA conversions and recharacterizations;

· Shares redeemed to return an excess contribution from a retirement account;

· Transactions in Section 529 college savings plans;

· Certain transactions in defined benefit and nonqualified plans, subject to prior approval by T. Rowe Price;

· Shares converted from one share class to another share class in the same fund; and

· Shares of T. Rowe Price funds that are purchased by another T. Rowe Price fund, including shares purchased by T. Rowe Price fund-of-funds products, and shares purchased by discretionary accounts managed by T. Rowe Price or one of its affiliates (please note that shareholders of the investing T. Rowe Price fund are still subject to the policy).

Transactions in certain rebalancing, asset allocation, wrap programs, and other advisory programs, as well as non-T. Rowe Price fund-of-funds products, may also be exempt from the 30-Day Purchase Block, subject to prior written approval by T. Rowe Price.

In addition to restricting transactions in accordance with the 30-Day Purchase Block, T. Rowe Price may, in its discretion, reject (or instruct an intermediary to reject) any purchase or exchange into a fund from a person (which includes individuals and entities) whose trading activity could disrupt the management of the fund or dilute the value of the fund’s shares, including trading by persons acting collectively (e.g., following the advice of a newsletter). Such persons may be barred, without prior notice, from further purchases of T. Rowe Price funds for a period longer than 30 calendar days or permanently.

Intermediary Accounts If you invest in T. Rowe Price funds through an intermediary, you should review the intermediary’s materials carefully or consult with the intermediary directly to determine the trading policy that will apply to your trades in the funds as well as any other rules or conditions on transactions that may apply. If T. Rowe Price is unable to identify a transaction placed through an intermediary as exempt from the excessive trading policy, the 30-Day Purchase Block may apply.

Intermediaries may maintain their underlying accounts directly with the fund, although they often establish an omnibus account (one account with the fund that represents multiple underlying shareholder accounts) on behalf of their customers. When intermediaries establish omnibus accounts in the T. Rowe Price funds, T. Rowe Price is not able to monitor the trading activity of the underlying shareholders. However, T. Rowe Price monitors aggregate trading activity at the intermediary (omnibus account) level in an attempt to identify activity that indicates

potential excessive or short-term trading. If it detects suspicious trading activity, T. Rowe Price may contact the intermediary and may request personal identifying information and transaction histories for some or all underlying shareholders (including plan participants, if applicable). If T. Rowe Price believes that excessive or short-term trading has occurred, it will instruct the intermediary to impose restrictions to discourage such practices and take appropriate action with respect to the underlying shareholder, including restricting purchases for 30 calendar days or longer. There is no assurance that T. Rowe Price will be able to properly enforce its excessive trading policies for omnibus accounts. Because T. Rowe Price generally relies on intermediaries to provide information and impose restrictions for omnibus accounts, its ability to monitor and deter excessive trading will be dependent upon the intermediaries’ timely performance of their responsibilities.

T. Rowe Price may allow an intermediary or other third party to maintain restrictions on trading in the T. Rowe Price funds that differ from the 30-Day Purchase Block. An alternative excessive trading policy would be acceptable to T. Rowe Price if it believes that the policy would provide sufficient protection to the T. Rowe Price funds and their shareholders that is consistent with the excessive trading policy adopted by the funds’ Boards of Directors/Trustees.

Retirement Plan Accounts If shares are held in a retirement plan, generally the
30-Day Purchase Block applies only to shares redeemed by a participant-directed exchange to another fund. However, the 30-Day Purchase Block may apply to transactions other than exchanges depending on how shares of the plan are held at T. Rowe Price or the excessive trading policy applied by your plan’s recordkeeper. An alternative excessive trading policy may apply to the T. Rowe Price funds where a retirement plan has its own policy deemed acceptable to T. Rowe Price. You should contact T. Rowe Price or your plan recordkeeper to determine which of your transactions are subject to the funds’ 30-Day Purchase Block or an alternative policy.

There is no guarantee that T. Rowe Price will be able to identify or prevent all excessive or short-term trades or trading practices.

Keeping Your Account Open

To keep operating expenses lower, we ask you to maintain an account balance of at least $1 million. If your investment is below $1 million, we have the right to redeem your account at the then-current net asset value after giving you 60 days to increase your balance. The redemption of the account could result in a taxable gain.

Signature Guarantees

A Medallion signature guarantee is designed to protect you and the T. Rowe Price funds from fraud by verifying your signature.

An intermediary may need to obtain a signature guarantee in certain situations, such as:

· Written requests to redeem over $5 million;

· Remitting redemption proceeds to any person, address, or bank account not on file; or

· Changing the account registration or broker-dealer of record for an account.

Intermediaries should consult their T. Rowe Price Financial Institution Services representative for specific requirements.

The signature guarantee must be obtained from a financial institution that is a participant in a Medallion signature guarantee program. You can obtain a Medallion signature guarantee from most banks, savings institutions, broker-dealers, and other guarantors acceptable to T. Rowe Price. When obtaining a Medallion signature guarantee, please discuss with the guarantor the dollar amount of your proposed transaction. It is important that the level of coverage provided by the guarantor’s stamp covers the dollar amount of the transaction or it may be rejected. We cannot accept guarantees from notaries public or organizations that do not provide reimbursement in the case of fraud.

How is the fund organized?

T. Rowe Price Institutional Income Funds, Inc. (the “Corporation”) was incorporated in Maryland in 2000. Currently, the Corporation consists of six series, each representing a separate pool of assets with different investment objectives. Each series is an “open-end management investment company,” or mutual fund. Mutual funds pool money received from shareholders and invest it to try to achieve specified objectives.

What is meant by “shares”?

As with all mutual funds, investors purchase shares when they put money in a fund. These shares are part of a fund’s authorized capital stock, but share certificates are not issued.

Each share and fractional share entitles the shareholder to:

· Receive a proportional interest in income and capital gain distributions. For funds with multiple share classes, the income dividends for each share class will generally differ from those of other share classes to the extent that the expense ratios of the classes differ.

· Cast one vote per share on certain fund matters, including the election of fund directors/trustees, changes in fundamental policies, or approval of material changes to the fund’s management contract. Shareholders of each class have exclusive voting rights on matters affecting only that class.

Do T. Rowe Price funds have annual shareholder meetings?

The funds are not required to hold regularly scheduled shareholder meetings. To avoid unnecessary costs to fund shareholders, shareholder meetings are only held when certain matters, such as changes in fundamental policies or elections of directors/trustees, must be decided. In addition, shareholders representing at least 10% of all eligible votes may call a special meeting for the purpose of voting on the removal of any fund director or trustee. If a meeting is held and you cannot attend, you can vote by proxy. Before the meeting, the fund will send or make available to you proxy materials that explain the matters to be decided and include instructions on voting by mail, telephone, or the Internet.

Who runs the fund?

General Oversight

The fund is governed by a Board of Directors (the “Board”) that meets regularly to review fund investments, performance, expenses, and other business affairs. The

Board elects the fund’s officers. At least 75% of Board members are independent of T. Rowe Price and its affiliates (the “Firm”).

All decisions regarding the purchase and sale of fund investments are made by T. Rowe Price—specifically by the fund’s portfolio manager.

Investment Adviser

T. Rowe Price is the fund’s investment adviser and oversees the selection of the fund’s investments and management of the fund’s portfolio. T. Rowe Price is a SEC-registered investment adviser that provides investment management services to individual and institutional investors, and sponsors and serves as adviser and sub-adviser to registered investment companies, institutional separate accounts, and common trust funds. The address for T. Rowe Price is 100 East Pratt Street, Baltimore, Maryland 21202. As of June 30, 2015, the Firm had approximately $773 billion in assets under management and provided investment management services for more than 9 million individual and institutional investor accounts.

Portfolio Management

T. Rowe Price has established an Investment Advisory Committee with respect to the fund. The committee chairman has day-to-day responsibility for managing the fund’s portfolio and works with the committee in developing and executing the fund’s investment program. The members of the committee are as follows: Brian J. Brennan, Chairman, Steve Boothe, Christopher P. Brown, Michael J. Conelius, Steven C. Huber, Arif Husain, Andrew J. Keirle, Robert M. Larkins, Andrew C. McCormick, Daniel O. Shackelford, Ju Yen Tan, David A. Tiberii, and Mark J. Vaselkiv. The following information provides the year that the chairman first joined the Firm and the chairman’s specific business experience during the past five years (although the chairman may have had portfolio management responsibilities for a longer period). Mr. Brennan has been chairman of the committee since the fund’s inception in 2004. He joined the Firm in 2000 and his investment experience dates from 1986. He has served as a portfolio manager with the Firm throughout the past five years. The Statement of Additional Information provides additional information about the portfolio manager’s compensation, other accounts managed by the portfolio manager, and the portfolio manager’s ownership of fund shares.

The Management Fee

The fund pays the investment adviser an annual all-inclusive management fee of 0.40% based on the fund’s average daily net assets. The management fee is calculated and accrued daily and it includes investment management services and ordinary, recurring operating expenses, but does not cover interest, expenses related to borrowing, taxes, and brokerage, or nonrecurring extraordinary expenses.

A discussion about the factors considered by the Board and its conclusions in approving the fund’s investment management contract with T. Rowe Price appears in the fund’s annual report to shareholders for the period ended May 31.

The fund could generate higher income and have greater potential for capital appreciation than bond funds that invest substantially all of their assets in investment-grade bonds, but with less volatility than a bond fund that focuses on high yield bonds. The addition of high yield bonds, bank loans, convertibles, and foreign securities provides the opportunity for capital growth and higher income. In addition, these securities could help to moderate the fund’s price decline when interest rates rise because they may be less sensitive to U.S. interest rate movements.

In addition to investing in a wide array of bonds and other debt instruments, the fund also uses interest rate futures and forward currency exchange contracts as part of its principal investment strategies. Interest rate futures are typically used to manage the fund’s duration and overall interest rate exposure, but may also be used as a tool to help manage significant cash flows into and out of the fund. Forward currency exchange contracts are used to protect the fund’s non-U.S. dollar-denominated holdings from adverse currency movements by hedging the fund’s foreign currency exposure back to the U.S. dollar, as well as to gain exposure to a currency believed to be appreciating in value versus other currencies.

The fund’s yield will vary. A fund’s yield is the annualized dividends earned for a given period (typically 30 days for bond funds), divided by the share price at the end of the period. A fund’s total return includes distributions from income and capital gains and the change in share price for a given period.

Credit quality refers to a bond issuer’s expected ability to make all required interest and principal payments on time. Because highly-rated issuers represent less risk, they can borrow at lower interest rates than less-creditworthy issuers. Therefore, a fund investing in high-quality securities should have a lower yield than an otherwise comparable fund investing in lower-quality securities.

Every bond has a stated maturity date when the issuer must repay the bond’s entire principal value to the investor. However, many bonds are “callable,” meaning their principal can be repaid before the stated maturity date. Bonds are most likely to be called when interest rates are falling because the issuer can refinance at a lower rate, just as a homeowner refinances a mortgage when interest rates fall. In that environment, a bond’s “effective maturity” is usually its nearest call date. For example, the rate at which homeowners pay down their mortgage principal determines the effective maturity of mortgage-backed bonds.

A bond fund has no real maturity, but it does have a weighted average maturity and a weighted average effective maturity. Each of these numbers is an average of the stated or effective maturities of the underlying bonds, with each bond’s maturity “weighted” by the percentage of fund assets it represents. (The fund’s average effective maturity takes into consideration the possibility that an issuer may call a bond before its maturity date or, with respect to a pool of mortgages, the likelihood of prepayments

on the mortgages.) Some funds utilize effective maturities rather than stated maturities when managing a fund to a certain average maturity, which provides additional flexibility in portfolio management.

Duration is a calculation that seeks to measure the price sensitivity of a bond or a bond fund to changes in interest rates. It is expressed in years, like maturity, but it is a better indicator of price sensitivity than maturity because it takes into account the time value of cash flows generated over the bond’s life. Future interest and principal payments are discounted to reflect their present value and then multiplied by the number of years they will be received to produce a value expressed in years–the duration. “Effective” duration takes into account call features and sinking fund payments that may shorten a bond’s life.

Since duration can be computed for bond funds, you can estimate the effect of interest rate fluctuations on share prices by multiplying fund duration by an expected change in interest rates. For example, the price of a bond fund with a duration of five years would be expected to fall approximately 5% if rates rose by one percentage point. A bond fund with a longer duration will generally be more sensitive to changes in interest rates than a bond fund with a shorter duration. (A bond fund’s duration is shown in its shareholder report.)

As with any mutual fund, there is no guarantee the fund will achieve its objective. The fund’s share price fluctuates, which means you could lose money when you sell your shares of the fund. The income level of the fund will change with market conditions and interest rate levels. Some particular risks affecting the fund include the following:

Market risk The market price of investments owned by a fund may go up or down, sometimes rapidly or unpredictably. Fund investments may decline in value due to factors affecting the overall markets, or particular industries or sectors. The value of a holding may decline due to general market conditions which are not specifically related to a particular issuer, such as real or perceived adverse economic conditions, changes in the general outlook for an issuer’s financial condition, changes in interest or currency rates, or adverse investor sentiment generally. The value of a holding may also decline due to factors which affect a particular industry or industries, such as labor shortages or increased production costs and competitive conditions within an industry. A fund may experience heavy redemptions that could cause the fund to liquidate its assets at inopportune times or at a loss or depressed value, which could cause the value of your investment in the fund to unexpectedly decline.

Interest rate risk This is the risk that prices of bonds and other fixed income securities will increase as interest rates fall and that prices will decrease as interest rates rise (bond prices and interest rates usually move in opposite directions). Prices fall because the bonds and notes in the fund’s portfolio become less attractive to other investors when securities with higher yields become available. Even mortgage-backed securities and other securities whose principal and interest payments are

guaranteed can decline in price if interest rates rise. Generally, securities with longer maturities and funds with longer weighted average maturities have greater interest rate risk. As a result, in a rising interest rate environment, the net asset value of a fund with a longer weighted average maturity typically decreases at a faster rate than the net asset value of a fund with a shorter weighted average maturity. If the fund purchases longer-maturity bonds and interest rates rise unexpectedly, the fund’s share price could decline.

Credit risk This is the risk that an issuer of a debt security held by the fund will default (fail to make scheduled payments), potentially reducing the fund’s income and share price. Credit risk is increased when a portfolio security is downgraded or the perceived creditworthiness of an issuer or counterparty deteriorates.

Investment-grade (AAA through BBB, or an equivalent rating) securities should have a relatively lower risk of encountering financial problems and a relatively higher probability of future payments. However, securities rated BBB or below (or an equivalent rating) are more susceptible to adverse economic conditions and may have speculative characteristics. Securities rated below investment grade (“junk” or high yield bonds) should be regarded as speculative because their issuers are more susceptible to financial setbacks and recession than more creditworthy companies. High yield bond issuers include small companies lacking the history or capital to merit investment-grade status, former blue-chip companies downgraded because of financial problems, and firms with heavy debt loads. If the fund invests in securities whose issuers develop unexpected credit problems, the fund’s share price could decline.

The fund may continue to hold a security that has been downgraded or has lost its investment-grade rating after purchase.

The fund’s exposure to credit risk is greater than that of a Treasury fund or one with all high-quality bonds, but should be less than that of a fund focusing only on high yield “junk” bonds. Higher-quality bond prices are affected primarily by changes in interest rate levels, but high yield bond prices are affected by other factors as well: changes in a company’s financial situation, economic forecasts, stock market conditions, technical market analysis, and overall market psychology that can lead to the kind of volatility associated with stocks. High yield bonds are generally less liquid than high-quality bonds, meaning that large transactions can cause substantial price changes.

Prepayment risk This is the risk that a fund investing in mortgage-backed securities, certain asset-backed securities, and other debt securities that have embedded call options can be negatively impacted when interest rates fall because borrowers tend to refinance and prepay principal. Receiving increasing prepayments in a falling interest rate environment causes the average maturity of the portfolio to shorten, reducing its potential for price gains. It also requires the fund to reinvest proceeds at lower

interest rates, which reduces the fund’s total return and yield, and could result in a loss if bond prices fall below the level that the fund paid for them.

Extension risk This is the risk that a rise in interest rates or lack of refinancing opportunities can cause a fund’s average maturity to lengthen unexpectedly due to a drop in expected prepayments of mortgage-backed securities, asset-backed securities, and callable debt securities. This would increase a fund’s sensitivity to rising rates and its potential for price declines.

Foreign investing risk To the extent a fund holds foreign securities, it will be subject to special risks, whether the securities are denominated in U.S. dollars or foreign currencies. These risks include potentially adverse local, political, social, and economic conditions overseas, greater volatility, lower liquidity, and the possibility that foreign currencies will decline against the dollar, lowering the value of securities denominated in those currencies and possibly a fund’s share price. Foreign currencies held directly by the fund could decline in value and lower the fund’s share price.

Emerging markets risk The fund’s investments in emerging markets (including frontier markets) are subject to the risk of abrupt and severe price declines. The economic and political structures of developing or emerging market countries, in most cases, do not compare favorably with the U.S. or other developed countries in terms of wealth and stability, and their financial markets often lack liquidity. These economies are less developed, can be overly reliant on particular industries, and more vulnerable to the ebb and flow of international trade, trade barriers, and other protectionist or retaliatory measures. Sanctions and other intergovernmental actions are more likely to be undertaken against an emerging market country, which could result in the devaluation of the country’s currency, a downgrade in the country’s credit rating, and a decline in the value and liquidity of securities issued by the country’s government and by companies located in or doing business in the country. Sanctions could result in the immediate freeze of securities issued by an emerging market company or government, which would impair the ability of a fund to buy, sell, or receive proceeds from the sanctioned securities. Some countries have legacies of hyperinflation and currency devaluations versus the U.S. dollar (which adversely affect returns to U.S. investors). Significant devaluations have occurred in recent years in various emerging market countries. Governments of some emerging market countries have defaulted on their bonds, and investors in this sector must be prepared for similar events in the future.

Liquidity risk This is the risk that a fund may not be able to sell a holding in a timely manner at a desired price. Sectors of the bond market can experience sudden downturns in trading activity. During periods of reduced market liquidity, the spread between the price at which a security can be bought and the price at which it can be sold can widen, and the fund may not be able to sell a holding readily at a price that reflects what the fund believes it should be worth. Less liquid securities can also become more difficult to value. Liquidity risk may be the result of, among other things, the reduced number and capacity of broker-dealers to make a market in fixed

income securities or the lack of an active market. The potential for liquidity risk may be magnified by a rising interest rate environment or other circumstances where selling activity from fixed income investors may be higher than normal, potentially causing increased supply in the market.

Derivatives risk The fund’s use of interest rate futures and forward currency exchange contracts exposes the fund to additional volatility in comparison to investing directly in bonds and other debt instruments. These instruments can experience reduced liquidity and become difficult to value, and any of these instruments not traded on an exchange are subject to the risk that a counterparty to the transaction will fail to meet its obligations under the derivatives contract. The use of these instruments involves the risks that anticipated interest rate movements and changes in currency movements will not be accurately predicted.

Efforts to reduce risk The portfolio manager may mitigate but not eliminate risk through one or more of the following:

· Thorough credit research performed by T. Rowe Price analysts;

· Extensive diversification, which helps limit the fund’s exposure to any one industry or issuer;

· Variations in the amount of assets invested in various types of securities; and

· Employing an active sell discipline to reduce unwanted securities.

Additional strategies and risks In addition to the fund’s normal investments, the fund may employ other strategies that are not considered part of its principal investment strategies. Such investments may include other securities and, to a limited extent, other types of derivatives than those described in the fund’s principal strategies. For instance, in addition to bonds with customary settlement periods, the fund may purchase or sell mortgage-backed securities on a delayed delivery or forward commitment basis through the “to-be-announced” (TBA) market. With TBA transactions, the particular securities to be delivered are not identified at the trade date but the delivered securities must meet specified terms and standards. Although the particular TBA securities must meet industry-accepted “good delivery” standards, there can be no assurance that a security purchased on a forward commitment basis will ultimately be issued or delivered by the counterparty. During the settlement period, the fund will still bear the risk of any decline in the value of the security to be delivered. Whether or not the fund takes delivery of the securities at the termination date of a TBA transaction, it will nonetheless be exposed to changes in the value of the underlying investments during the term of the agreement.

A derivative involves risks different from, and possibly greater than, the risks associated with investing directly in the assets on which the derivative is based. Derivatives can be highly volatile, illiquid, and difficult to value. Changes in the value of a derivative may not properly correlate with changes in the value of the underlying asset, reference rate, or index. A fund could be exposed to significant losses if it is unable to close a derivatives position due to the lack of a liquid trading market.

Derivatives involve the risk that a counterparty to the derivatives agreement will fail to make required payments or comply with the terms of the agreement. There is also the possibility that limitations or trading restrictions may be imposed by an exchange or government regulation, which could adversely impact the value and liquidity of a derivatives contract subject to such regulation.

Recent regulations have changed the requirements related to the use of certain derivatives. Some of these new regulations have limited the availability of certain derivatives and made their use by funds more costly. It is expected that additional changes to the regulatory framework will occur, but the extent and impact of additional new regulations are not certain at this time.

The Statement of Additional Information contains more detailed information about the fund and its investments, operations, and expenses.

This section takes a detailed look at some of the types of fund securities and the various kinds of investment practices that may be used in day-to-day portfolio management. Fund investments are subject to further restrictions and risks described in the Statement of Additional Information.

Shareholder approval is required to substantively change fund investment objectives. Shareholder approval is also required to change certain investment restrictions noted in the following section as “fundamental policies.” Portfolio managers also follow certain “operating policies” that can be changed without shareholder approval.

Fund holdings in certain kinds of investments cannot exceed maximum percentages as set forth in this prospectus and the Statement of Additional Information. For instance, there are limitations regarding fund investments in certain types of derivatives. While these restrictions provide a useful level of detail about fund investments, investors should not view them as an accurate gauge of the potential risk of such investments. For example, in a given period, a 5% investment in derivatives could have a significantly greater impact on a fund’s share price than its weighting in the portfolio. The net effect of a particular investment depends on its volatility and the size of its overall return in relation to the performance of all other fund investments.

Certain investment restrictions, such as a required minimum or maximum investment in a particular type of security, are measured at the time a fund purchases a security. The status, market value, maturity, credit quality, or other characteristics of a fund’s securities may change after they are purchased, and this may cause the amount of a fund’s assets invested in such securities to exceed the stated maximum restriction or fall below the stated minimum restriction. If any of these changes occur,

it would not be considered a violation of the investment restriction and will not require the sale of an investment if it was proper at the time the investment was made (this exception does not apply to a fund’s borrowing policy or liquidity policy). However, purchases by a fund during the time it is above or below the stated percentage restriction would be made in compliance with applicable restrictions.

Changes in fund holdings, fund performance, and the contribution of various investments to fund performance are discussed in the shareholder reports.

Portfolio managers have considerable discretion in choosing investment strategies and selecting securities they believe will help achieve fund objectives.

Types of Portfolio Securities

In seeking to meet its investment objective, fund investments may be made in any type of security or instrument (including certain potentially high-risk derivatives described in this section) whose investment characteristics are consistent with its investment program. The following pages describe various types of fund holdings and investment management practices.

Diversification As a fundamental policy, the fund will not purchase a security if, as a result, with respect to 75% of its total assets, more than 5% of the fund’s total assets would be invested in securities of a single issuer or more than 10% of the outstanding voting securities of the issuer would be held by the fund. These limitations do not apply to fund purchases of securities issued or guaranteed by the U.S. government, its agencies, or instrumentalities.

Bonds

A bond is an interest-bearing security. The issuer has a contractual obligation to pay interest at a stated rate on specific dates and to repay principal (the bond’s face value) on a specified date. An issuer may have the right to redeem or “call” a bond before maturity, and the investor may have to reinvest the proceeds at lower market rates. Bonds can be issued by U.S. and foreign governments, states, and municipalities, as well as a wide variety of companies.

A bond’s annual interest income, set by its coupon rate, is usually fixed for the life of the bond. Its yield (income as a percent of current price) will fluctuate to reflect changes in interest rate levels. A bond’s price usually rises when interest rates fall and vice versa, so its yield generally stays consistent with current market conditions.

Conventional fixed rate bonds offer a coupon rate for a fixed maturity with no adjustment for inflation. Real rate of return bonds also offer a fixed coupon but include ongoing inflation adjustments for the life of the bond.

Bonds may be unsecured (backed by the issuer’s general creditworthiness only) or secured (also backed by specified collateral). Bonds include asset- and mortgage-backed securities.

Certain bonds have floating or variable interest rates that are adjusted periodically based on a particular index. These interest rate adjustments tend to minimize fluctuations in the bonds’ principal values. The maturity of certain floating rate securities may be shortened under certain specified conditions.

Bond investments may include Build America Bonds issued by state and local governments to finance capital expenditures for which they otherwise could issue tax-exempt governmental bonds. Unlike most other municipal obligations, interest received on Build America Bonds is taxable to the bondholder. These include bonds on which the issuer may receive an interest payment subsidy directly from the U.S. Treasury, known as direct pay Build America Bonds, and bonds on which the investor may receive a tax credit, known as tax credit Build America Bonds.

Common and Preferred Stocks

Stocks represent shares of ownership in a company. Generally, preferred stocks have a specified dividend rate and rank after bonds and before common stocks in their claim on income for dividend payments and on assets should the company be liquidated. After other claims are satisfied, common stockholders participate in company profits on a pro-rata basis; profits may be paid out in dividends or reinvested in the company to help it grow. Increases and decreases in earnings are usually reflected in a company’s stock price, so common stocks generally have the greatest appreciation and depreciation potential of all corporate securities. Unlike common stock, preferred stock does not ordinarily carry voting rights. While most preferred stocks pay a dividend, a fund may decide to purchase preferred stock where the issuer has suspended, or is in danger of suspending, payment of its dividend.

Operating policy The fund does not intend to invest directly in common stocks.

Convertible Securities and Warrants

Investments may be made in debt or preferred equity securities that are convertible into, or exchangeable for, equity securities at specified times in the future and according to a certain exchange ratio. Convertible bonds are typically callable by the issuer, which could in effect force conversion before the holder would otherwise choose. Traditionally, convertible securities have paid dividends or interest at rates higher than common stocks but lower than nonconvertible securities. They generally participate in the appreciation or depreciation of the underlying stock into which they are convertible, but to a lesser degree than common stock. Some convertible securities combine higher or lower current income with options and other features. Warrants are options to buy, directly from the issuer, a stated number of shares of common stock at a specified price anytime during the life of the warrants (generally, two or more years). Warrants have no voting rights, pay no dividends, and can be highly volatile. In some cases, the redemption value of a warrant could be zero.

Operating policy The fund may invest up to 10% of net assets in preferred stocks and securities that are convertible into, or which carry warrants for, common stocks or

other equity securities. Under normal conditions, the fund does not expect to directly purchase common stocks. Any shares of common stock that are received through a reorganization, restructuring, exercise, exchange, conversion, or similar action will be sold within a reasonable timeframe taking into consideration market conditions and any legal restrictions.

Foreign Securities

Investments may be made in foreign securities. Foreign securities could include non-U.S. dollar-denominated securities traded outside of the U.S. and dollar-denominated securities of foreign issuers traded in the U.S. (such as Yankee bonds). Investing in foreign securities involves special risks that can increase the potential for losses. These include exposure to potentially adverse local, political, social, and economic developments such as war, political instability, hyperinflation, currency devaluations, and overdependence on particular industries; government interference in markets such as nationalization and exchange controls, expropriation of assets, or imposition of punitive taxes; the imposition of international trade and capital barriers, and other protectionist or retaliatory measures; potentially lower liquidity and higher volatility; possible problems arising from accounting, disclosure, settlement, and regulatory practices and legal rights that differ from U.S. standards; and the chance that fluctuations in foreign exchange rates will decrease the investment’s value (favorable changes can increase its value). These risks are heightened for a fund’s investments in emerging markets.

Operating policy There is no limit on fund investments in U.S. dollar-denominated debt securities issued by foreign issuers, foreign branches of U.S. banks, and U.S. branches of foreign banks. The fund may also invest up to 20% of net assets (excluding reserves) in non-U.S. dollar-denominated debt securities.

Mortgage-Backed Securities

A fund may invest in a variety of mortgage-backed securities. Mortgage lenders pool individual home mortgages with similar characteristics to back a certificate or bond, which is sold to investors such as the fund. Interest and principal payments generated by the underlying mortgages are passed through to the investors. The “big three” issuers are the Government National Mortgage Association, the Federal National Mortgage Association, and the Federal Home Loan Mortgage Corporation. Government National Mortgage Association certificates are backed by the full faith and credit of the U.S. government, while others, such as the Federal National Mortgage Association and Federal Home Loan Mortgage Corporation certificates, are only supported by the ability to borrow from the U.S. Treasury or by the credit of the agency. (Since September 2008, the Federal National Mortgage Association and the Federal Home Loan Mortgage Corporation have operated under conservatorship of the Federal Housing Finance Agency, an independent federal agency.) Private mortgage bankers and other institutions also issue mortgage-backed securities.

Mortgage-backed securities are subject to scheduled and unscheduled principal payments as homeowners pay down or prepay their mortgages. As these payments are received, they must be reinvested when interest rates may be higher or lower than on the original mortgage security. Therefore, these securities are not an effective means of locking in long-term interest rates. In addition, when interest rates fall, the rate of mortgage prepayments, including refinancings, tends to increase. Refinanced mortgages are paid off at face value or “par,” causing a loss for any investor who may have purchased the security at a price above par. In such an environment, this risk limits the potential price appreciation of these securities and can negatively affect a fund’s net asset value. When interest rates rise, the prices of mortgage-backed securities can be expected to decline. In addition, when interest rates rise and prepayments slow, the effective duration of mortgage-backed securities extends, resulting in increased price volatility.

Operating policy Other than stripped mortgage securities, there is no limit on fund investments in mortgage-backed securities.

Other types of mortgage-backed securities in which the fund may invest include:

Collateralized Mortgage Obligations Collateralized mortgage obligations are debt securities that are fully collateralized by a portfolio of mortgages or mortgage-backed securities including Government National Mortgage Association, Federal National Mortgage Association, Federal Home Loan Mortgage Corporation, and non-agency-backed mortgages. All interest and principal payments from the underlying mortgages are passed through to the collateralized mortgage obligations in such a way as to create different classes with varying risk characteristics, payment structures, and maturity dates. Collateralized mortgage obligation classes may pay fixed or variable rates of interest, and certain classes have priority over others with respect to the receipt of prepayments and allocation of defaults.

Stripped Mortgage Securities Stripped mortgage securities are created by separating the interest and principal payments generated by a pool of mortgage-backed securities or a collateralized mortgage obligation to create additional classes of securities. Generally, one class receives interest-only payments and another receives principal-only payments. Unlike other mortgage-backed securities and principal-only strips, the value of interest-only strips tends to move in the same direction as interest rates. A fund can use interest-only strips as a hedge against falling prepayment rates (when interest rates are rising) and/or in an unfavorable market environment. Principal-only strips can be used as a hedge against rising prepayment rates (when interest rates are falling) and/or in a favorable market environment. Interest-only strips and principal-only strips are acutely sensitive to interest rate changes and to the rate of principal prepayments.

A rapid or unexpected increase in prepayments can severely depress the price of interest-only strips, while a rapid or unexpected decrease in prepayments could have the same effect on principal-only strips. Of course, under the opposite conditions

these securities may appreciate in value. These securities can be very volatile in price and may have less liquidity than most other mortgage-backed securities. Certain non-stripped collateralized mortgage obligation classes may also exhibit these qualities, especially those that pay variable rates of interest that adjust inversely with, and more rapidly than, short-term interest rates. In addition, if interest rates rise rapidly and prepayment rates slow more than expected, certain collateralized mortgage obligation classes, in addition to losing value, can exhibit characteristics of long-term securities and become more volatile. There is no guarantee that a fund’s investments in collateralized mortgage obligations, interest-only strips, or principal-only strips will be successful, and a fund’s total return could be adversely affected as a result.

Operating policy Fund investments in stripped mortgage securities are limited to 5% of total assets.

Commercial Mortgage-Backed Securities Commercial mortgage-backed securities are securities created from a pool of commercial mortgage loans, such as loans for hotels, shopping centers, office buildings, and apartment buildings. Interest and principal payments from the loans are passed on to the investor according to a schedule of payments. Credit quality depends primarily on the quality of the loans themselves and on the structure of the particular deal. Generally, deals are structured with senior and subordinate classes. The degree of subordination is determined by the rating agencies who rate the individual classes of the structure. Commercial mortgages are generally structured with prepayment penalties, which greatly reduce prepayment risk to the investor. However, the value of these securities may change because of actual or perceived changes in the creditworthiness of the individual borrowers, their tenants, the servicing agents, or the general state of commercial real estate.

Asset-Backed Securities

An underlying pool of assets, such as credit card or automobile trade receivables or corporate loans or bonds, backs these bonds and provides the interest and principal payments to investors. On occasion, the pool of assets may also include a swap obligation, which is used to change the cash flows on the underlying assets. As an example, a swap may be used to allow floating rate assets to back a fixed rate obligation. Credit quality depends primarily on the quality of the underlying assets, the level of any credit support provided by the structure or by a third-party insurance wrap, and the credit quality of the swap counterparty, if any. The underlying assets (i.e., loans) are sometimes subject to prepayments, which can shorten the security’s effective maturity and may lower its return. The value of these securities also may change because of actual or perceived changes in the creditworthiness of the individual borrowers, the originator, the servicing agent, the financial institution providing the credit support, or the swap counterparty. The fund will invest the loan proceeds in additional securities and other assets consistent with its investment program.

High Yield, High-Risk Bonds

The price and yield of lower-quality (high yield, high-risk) bonds, commonly referred to as “junk” bonds, and below investment-grade emerging market bonds, can be expected to fluctuate more than the price and yield of higher-quality bonds. Because these bonds are rated below BBB (or an equivalent rating) or are in default, they are regarded as predominantly speculative with respect to the issuer’s continuing ability to meet principal and interest payments. Successful investment in lower-medium- and low-quality bonds involves greater investment risk and is highly dependent on T. Rowe Price’s credit analysis. A real or perceived economic downturn or higher interest rates could cause a decline in high yield bond prices by lessening the ability of issuers to make principal and interest payments. These bonds are often thinly traded and can be more difficult to sell and value accurately than high-quality bonds. Because objective pricing data may be less available, judgment may play a greater role in the valuation process. In addition, the entire high yield bond market can experience sudden and sharp price swings due to a variety of factors, including changes in economic forecasts, stock market activity, large or sustained sales by major investors, a high-profile default, or just a change in the market’s psychology. This type of volatility is usually associated more with stocks than bonds, but “junk” bond investors should be prepared for it.

Operating policy The fund may invest up to 20% of net assets in “junk” bonds of issuers in the U.S. and other developed countries, and may invest up to 10% of net assets in below investment-grade emerging market debt.

Loan Participations and Assignments

The fund may make investments through the purchase or execution of a privately negotiated note or loan, or may acquire loans as an assignment from another lender that holds a direct interest in the loan or as a participation interest in another lender’s portion of the loan. Larger loans to corporations or governments may be shared or syndicated among several lenders, usually banks. The fund could participate in such syndicates or could buy part of a loan, becoming a direct lender. These loans may often be obligations of companies or governments in financial distress or in default. These investments involve special types of risk, including those of being a lender, reduced liquidity, increased credit risk, and volatility.

Bank loans may be acquired directly through an agent acting on behalf of the lenders participating in the loan, as an assignment from another lender who holds a direct interest in the loan, or as a participation interest in another lender’s portion of the loan. An assignment typically results in the purchaser succeeding to all rights and obligations under the loan agreement between the assigning lender and the borrower. However, assignments may be arranged through private negotiations, and the rights and obligations acquired by the purchaser of an assignment may differ from, and be more limited than, those held by the assigning lender.

A participation interest is a fractional interest in a loan, issued by a lender or other financial institution. To the extent a fund invests in loans through participation interests, it will be more difficult for the fund to enforce its rights against the borrower because the fund will have established a direct contractual relationship with the seller of the participation interest but not with the borrower. When the fund invests in a loan by participation, it must rely on another party not only for the enforcement of its rights against the borrower, but also for the receipt and processing of payments due under the loan. Investing in a participation interest limits the fund’s ability to file a claim directly as a creditor in the event of the borrower’s bankruptcy.

Derivatives and Leverage

A derivative is a financial instrument whose value is derived from an underlying security, such as a stock or bond, or from a market benchmark, such as an interest rate index. Many types of investments representing a wide range of risks and potential rewards may be considered derivatives, including conventional instruments such as futures and options, as well as other potentially more complex investments such as swaps and structured notes. The use of derivatives can involve leverage. Leverage has the effect of magnifying returns, positively or negatively. The effect on returns will depend on the extent to which an investment is leveraged. For example, an investment of $1, leveraged at 2 to 1, would have the effect of an investment of $2. Leverage ratios can be higher or lower with a corresponding effect on returns. The fund may use derivatives in certain situations to help accomplish any or all of the following: to hedge against a decline in principal value, to increase yield, to manage exposure to changes in interest or currency exchange rates, to invest in eligible asset classes with greater efficiency and at a lower cost than is possible through direct investment, or to adjust portfolio duration or credit risk exposure.

While individual fund investments may involve leverage, the fund will not invest in any high-risk, highly leveraged derivative instrument that, at the time of entering into the derivative transaction, is expected to cause the overall price volatility of the portfolio to be meaningfully greater than that of a long-term (over 10-year maturity) investment-grade bond.

Derivatives that may be used include the following instruments, as well as others that combine the risk characteristics and features of futures, options, and swaps:

Futures and Options Futures, a type of potentially high-risk derivative, are often used to manage or hedge risk because they enable the investor to buy or sell an asset in the future at an agreed-upon price. Options, another type of potentially high-risk derivative, give the investor the right (when the investor purchases the option), or the obligation (when the investor “writes” or sells the option), to buy or sell an asset at a predetermined price in the future. Futures and options contracts may be bought or sold for any number of reasons, including to manage exposure to changes in interest rates, bond prices, foreign currencies, and credit quality; as an efficient means of increasing or decreasing a fund’s exposure to a specific part or broad segment of the

U.S. market or a foreign market; in an effort to enhance income; to improve risk-adjusted returns; to protect the value of portfolio securities; to serve as a cash management tool; and to adjust portfolio duration or credit risk exposure. Call or put options may be purchased or sold on securities, futures, and financial indexes. A fund may choose to continue a futures contract by "rolling over" an expiring futures contract into an identical contract with a later maturity date. This could increase the fund's transaction costs and portfolio turnover rate.

Futures contracts and options may not always be successful hedges; their prices can be highly volatile; using them could lower a fund’s total return; the potential loss from the use of futures can exceed a fund’s initial investment in such contracts; and the losses from certain options written by a fund could be unlimited.

Operating policies Initial margin deposits on futures and premiums on options used for non-hedging purposes will not exceed 5% of a fund’s net asset value. The total market value of securities covering call or put options may not exceed 25% of total assets. No more than 5% of total assets will be committed to premiums when purchasing call or put options.

Swaps Fund investments may be made in interest rate, index, total return, credit default, and other types of swap agreements, as well as options on swaps, commonly referred to as “swaptions,” and interest rate swap futures, which are instruments that provide a way to obtain swap exposure and the benefits of futures in one contract. All of these agreements are considered derivatives and, in certain cases, high-risk derivatives. Interest rate, index, and total return swaps are two-party contracts under which a fund and a counterparty, such as a broker or dealer, agree to exchange the returns (or differentials in rates of return) earned or realized on particular predetermined investments or indexes. Credit default swaps are agreements where one party (the protection buyer) will make periodic payments to another party (the protection seller) in exchange for protection against specified credit events, such as defaults and bankruptcies related to an issuer or underlying credit instrument. Swap futures are futures contracts on interest rate swaps that enable purchasers to settle in cash at a future date at the price determined by a specific benchmark rate at the end of a fixed period. Swaps, swaptions, and swap futures can be used for a variety of purposes, including to manage a fund’s overall exposure to changes in interest or foreign currency exchange rates and credit quality; as an efficient means of adjusting a fund’s exposure to certain markets; in an effort to enhance income or total return or protect the value of portfolio securities; to serve as a cash management tool; and to adjust portfolio duration or credit risk exposure.

There are risks in the use of swaps and related instruments. Swaps could result in losses if interest or foreign currency exchange rates or credit quality changes are not correctly anticipated by a fund. Total return swaps could result in losses if the reference index, security, or investments do not perform as anticipated. Credit default swaps can increase a fund’s exposure to credit risk and could result in losses if evaluation of the creditworthiness of the counterparty, or of the company or

government on which the credit default swap is based, is incorrect. The use of swaps, swaptions, and swap futures may not always be successful. Using them could lower a fund’s total return, their prices can be highly volatile, and the potential loss from the use of swaps can exceed a fund’s initial investment in such instruments. Also, the other party to a swap agreement could default on its obligations or refuse to cash out a fund’s investment at a reasonable price, which could turn an expected gain into a loss. Although there should be minimal counterparty risk associated with investments in interest rate swap futures, a fund could experience delays and/or losses due to the bankruptcy of a swap dealer through which the fund engaged in the transaction.

Operating policies A swap agreement with any single counterparty will not be entered into if the net amount owed or to be received under existing contracts with that party would exceed 5% of total assets or if the net amount owed or to be received by the fund under all outstanding swap agreements will exceed 10% of total assets. (Swap agreements that are cleared and settled through a clearinghouse, or traded on an exchange or swap execution facility, are not subject to these limits.) For swaptions, the total market value of securities covering call or put options may not exceed 25% of total assets. No more than 5% of total assets will be committed to premiums when purchasing call or put swaptions.

Hybrid Instruments Hybrid instruments (a type of potentially high-risk derivative) can combine the characteristics of securities, futures, and options. For example, the principal amount or interest rate of a hybrid could be tied (positively or negatively) to the price of some commodity, currency, security, or securities index or another interest rate (each a “benchmark”). Hybrids can be used as an efficient means of pursuing a variety of investment goals, including currency hedging, duration management, and increased total return. Hybrids may or may not bear interest or pay dividends. The value of a hybrid or its interest rate may be a multiple of a benchmark and, as a result, may be leveraged and move (up or down) more steeply and rapidly than the benchmark. These benchmarks may be sensitive to economic and political events, such as commodity shortages and currency devaluations, which cannot be readily foreseen by the purchaser of a hybrid. Under certain conditions, the redemption value of a hybrid could be zero. Thus, an investment in a hybrid may entail significant market risks that are not associated with a similar investment in a traditional, U.S. dollar-denominated bond that has a fixed principal amount and pays a fixed rate or floating rate of interest. The purchase of hybrids also exposes the fund to the credit risk of the issuer of the hybrid. These risks may cause significant fluctuations in the net asset value of the fund.

Hybrids can have volatile prices and limited liquidity, and their use may not be successful.

Operating policy Fund investments in hybrid instruments are limited to 10% of total assets.

Currency Derivatives The fund may engage in foreign currency transactions either on a spot (cash) basis at the rate prevailing in the currency exchange market at the time or through forward currency exchange contracts, which are contracts between two counterparties to exchange one currency for another on a future date at a specified exchange rate. In addition to foreign currency forwards, futures, swaps, and options on foreign currencies may also be used to protect a fund’s foreign securities from adverse currency movements relative to the U.S. dollar, as well as to gain exposure to currencies and markets expected to increase or decrease in value relative to other currencies or securities.

The fund may attempt to hedge its exposure to potentially unfavorable currency changes. Forward currency contracts can be used to adjust the foreign exchange exposure of the fund with a view to protecting the portfolio from adverse currency movements, based on T. Rowe Price’s outlook. However, forward currency contracts can also be used in an effort to benefit from a currency believed to be appreciating in value versus other currencies. The fund may invest in non-U.S. currencies directly without holding any non-U.S. bonds or securities denominated in those currencies.

Forward currency contracts involve special risks, including, but not limited to, the potential for significant volatility in currency markets, and the risk that in certain markets, particularly emerging markets, it is not possible to engage in effective foreign currency hedging. In addition, such transactions involve the risk that currency movements will not occur as anticipated by T. Rowe Price, which could reduce a fund’s total return.

The fund may enter into foreign currency transactions under the following circumstances:

Lock In When the fund desires to lock in the U.S. dollar price on the purchase or sale of a security denominated in a foreign currency.

Cross Hedge If a particular currency is expected to decrease in value relative to another currency, the fund may sell the currency expected to decrease and purchase a currency that is expected to increase against the currency sold. The fund’s cross hedging transactions may involve currencies in which the fund’s holdings are denominated. However, the fund is not required to own securities in the particular currency being purchased or sold.

Direct Hedge If the fund seeks to eliminate substantially all of the risk of owning a particular currency or believes the portfolio could benefit from price appreciation in a given country’s bonds but did not want to hold the currency, it could employ a direct hedge back into the U.S. dollar. In either case, a fund would enter into a forward contract to sell the currency in which a portfolio security is denominated and purchase U.S. dollars at an exchange rate established at the time it initiated the contract. The cost of the direct hedge transaction may offset most, if not all, of the yield advantage offered by the foreign security, but the fund would hope to benefit from an increase (if any) in the value of the bond.

Proxy Hedge In certain circumstances, a different currency may be substituted for the currency in which the investment is denominated, as part of a strategy known as proxy hedging. In this case, the fund, having purchased a security, will sell a currency whose value is believed to be closely linked to the currency in which the security is denominated. This type of hedging entails greater risk than a direct hedge because it is dependent on a stable relationship between the two currencies paired as proxies, and that relationship may not always be maintained. The fund may also use these instruments to create a synthetic bond, which is issued in one currency with the currency component transformed into another currency.

Costs of Hedging When the fund purchases a foreign bond with a higher interest rate than is available on U.S. bonds of a similar maturity, the additional yield on the foreign bond could be substantially lessened if the fund were to enter into a direct hedge by selling the foreign currency and purchasing the U.S. dollar. This is what is known as the “cost” of hedging. A proxy hedge, which is less costly than a direct hedge, may attempt to reduce this cost through an indirect hedge back to the U.S. dollar.

It is important to note that hedging costs are treated as capital transactions and are not, therefore, deducted from a fund’s dividend distribution and are not reflected in its yield. Instead, such costs will, over time, be reflected in a fund’s net asset value per share and total return. Hedging may result in the application of the mark-to-market and straddle provisions of the Internal Revenue Code. These provisions could result in an increase (or decrease) in the amount of taxable dividends paid by a fund and could affect whether dividends paid by a fund are classified as capital gains or ordinary income.

Operating policy The fund will not commit more than 20% of its net assets to any combination of currency derivatives. The fund’s exposure to non-U.S. currencies will not exceed 10% of its net assets when the fund does not hold any securities issued by a non-U.S. issuer.

Investments in Other Investment Companies

A fund may invest in other investment companies, including open-end funds, closed-end funds, and exchange-traded funds.

A fund may purchase the securities of another investment company to temporarily gain exposure to a portion of the market while awaiting purchase of securities or as an efficient means of gaining exposure to a particular asset class. The fund might also purchase shares of another investment company to gain exposure to the securities in the investment company’s portfolio at times when the fund may not be able to buy those securities directly. Any investment in another investment company would be consistent with the fund’s objective and investment program.

The risks of owning another investment company are generally similar to the risks of investing directly in the securities in which that investment company invests.

However, an investment company may not achieve its investment objective or execute its investment strategy effectively, which may adversely affect the fund’s performance. In addition, because closed-end funds and exchange-traded funds trade on a secondary market, their shares may trade at a premium or discount to the actual net asset value of their portfolio securities and their shares may have greater volatility if an active trading market does not exist.

As a shareholder of another investment company, the fund must pay its pro-rata share of that investment company’s fees and expenses. The fund’s investments in non-T. Rowe Price investment companies are subject to the limits that apply to investments in other funds under the Investment Company Act of 1940 or under any applicable exemptive order.

A fund may also invest in certain other T. Rowe Price funds as a means of gaining efficient and cost-effective exposure to certain asset classes, provided the investment is consistent with the fund’s investment program and policies. Such an investment could allow the fund to obtain the benefits of a more diversified portfolio than might otherwise be available through direct investments in the asset class, and will subject the fund to the risks associated with the particular asset class. Examples of asset classes in which other T. Rowe Price mutual funds concentrate their investments include high yield bonds, inflation-linked securities, floating rate loans, international bonds, emerging market bonds, stocks of companies involved in activities related to real assets, and emerging market stocks. If the fund invests in another T. Rowe Price fund, the management fee paid by the fund will be reduced to ensure that the fund does not incur duplicate management fees as a result of its investment.

Illiquid Securities

Some fund holdings may be considered illiquid because they are subject to legal or contractual restrictions on resale or because they cannot be sold in the ordinary course of business within seven days at approximately the prices at which they are valued. The determination of liquidity involves a variety of factors. Illiquid securities may include private placements that are sold directly to a small number of investors, usually institutions. Unlike public offerings, such securities are not registered with the SEC. Although certain of these securities may be readily sold (for example, pursuant to Rule 144A under the Securities Act of 1933) and therefore deemed liquid, others may have resale restrictions and be considered illiquid. The sale of illiquid securities may involve substantial delays and additional costs, and a fund may only be able to sell such securities at prices substantially lower than what it believes they are worth.

Operating policy Fund investments in illiquid securities are limited to 15% of net assets. The 15% limit on illiquid securities applies at the time of purchase and continues thereafter.

Types of Investment Management Practices

Reserve Position

A certain portion of fund assets may be held in reserves. Fund reserve positions can consist of: 1) shares of a T. Rowe Price internal money fund or short-term bond fund (which does not charge any management fees); 2) short-term, high-quality U.S. and foreign dollar-denominated money market securities, including repurchase agreements; and 3) U.S. dollar or non-U.S. dollar currencies. In order to respond to adverse market, economic, political, or other conditions, the fund may assume a temporary defensive position that is inconsistent with its principal investment objective and/or strategies and may invest, without limitation, in reserves. If a fund has significant holdings in reserves, it could compromise the fund’s ability to achieve its objectives. The reserve position provides flexibility in meeting redemptions, paying expenses and managing cash flows into a fund, and can serve as a short-term defense during periods of unusual market volatility. Non-U.S. dollar reserves are subject to currency risk.

When-Issued Securities and Forwards

A fund may purchase securities on a when-issued or delayed delivery basis or may purchase or sell securities on a forward commitment basis. There is no limit on fund investments in these securities. The price of these securities is fixed at the time of the commitment to buy, but delivery and payment take place after the customary settlement period for that type of security (often a month or more later). During the interim period, the price and yield of the securities can fluctuate, and typically no interest accrues to the purchaser. At the time of delivery, the market value of the securities may be more or less than the purchase or sale price. To the extent the fund remains fully or almost fully invested (in securities with a remaining maturity of more than one year) at the same time it purchases these securities, there will be greater fluctuations in the fund’s net asset value than if the fund did not purchase them.

Borrowing Money and Transferring Assets

A fund may borrow from banks, other persons, and other T. Rowe Price funds for temporary emergency purposes to facilitate redemption requests, or for other purposes consistent with fund policies as set forth in this prospectus and the Statement of Additional Information. Such borrowings may be collateralized with fund assets, subject to restrictions.

Fundamental policy Borrowings may not exceed 33¹/₃% of total assets. This limitation applies at the time of purchase and continues thereafter.

Operating policy A fund will not transfer portfolio securities as collateral except as necessary in connection with permissible borrowings or investments, and then such transfers may not exceed 33¹/₃% of total assets. A fund will not purchase additional securities when borrowings exceed 5% of total assets.

Lending of Portfolio Securities

A fund may lend its securities to broker-dealers, other institutions, or other persons to earn additional income. Risks include the potential insolvency of the broker-dealer or other borrower that could result in delays in recovering securities and capital losses. Additionally, losses could result from the reinvestment of collateral received on loaned securities in investments that default or do not perform as well as expected.

Fundamental policy The value of loaned securities may not exceed 33¹/₃% of total assets.

Credit Quality Considerations

The credit quality of many fund holdings is evaluated by rating agencies such as Moody’s Investors Service, Inc. (Moody’s), Standard & Poor’s Ratings Services (S&P), and Fitch Ratings (Fitch). Credit quality refers to the issuer’s ability and willingness to meet all required interest and principal payments. The highest ratings are assigned to issuers perceived to have the lowest credit risks. T. Rowe Price credit research analysts also evaluate fund holdings, including those rated by outside agencies. Other things being equal, bonds and other debt obligations with lower ratings typically have higher yields due to greater credit risk.

Credit quality ratings are not guarantees. They are estimates of an issuer’s creditworthiness and ability to make interest and principal payments as they come due. Ratings can change at any time due to actual or perceived changes in an issuer’s creditworthiness or financial fundamentals.

Bonds rated Baa and above by Moody’s, and BBB and above by S&P and Fitch, are considered to be “investment grade.” Bonds that are rated below these categories are considered to have greater credit risk and are referred to as “below investment grade” or “noninvestment grade.” Bonds rated below investment grade range from speculative to highly speculative with respect to the issuer’s ability or willingness to pay interest and repay principal. The following table summarizes the rating scales and associated credit risk assigned by the major rating agencies. Within these categories, the rating may be modified with a symbol (such as 1, 2, and 3, or a plus or minus) to indicate whether the bond is ranked in the higher or lower end of its rating category. T. Rowe Price considers publicly available ratings but emphasizes its own credit analysis when selecting investments.

Ratings of Debt Securities

Portfolio Turnover

Turnover is an indication of frequency of trading. A fund will not generally trade in securities for short-term profits, but when circumstances warrant, securities may be purchased and sold without regard to the length of time held. Each time a fund purchases or sells a security, it incurs a cost. This cost is reflected in its net asset value but not in its operating expenses. The higher the turnover rate, the higher the transaction costs and the greater the impact on a fund’s total return. Higher turnover can also increase the possibility of taxable capital gain distributions.

Funds investing in bonds may have higher turnover than funds investing in stocks. Unlike stocks, fixed-maturity bonds require reinvestment. For funds investing in short-term securities, mortgage-backed securities, and callable debt, frequent reinvestment of principal is often required. Common trading strategies, such as mortgage dollar rolls, can increase turnover. Active investment strategies, such as sector rotation and duration management, also necessitate more frequent trading. The fund’s portfolio turnover rates are shown in the Financial Highlights table.

Each T. Rowe Price fund’s portfolio holdings are disclosed on a regular basis in its semiannual and annual shareholder reports, and on Form N-Q, which is filed with the SEC within 60 days of the fund’s first and third fiscal quarter-end. The money funds also file detailed month-end portfolio holdings information with the SEC each month. Such information will be made available to the public 60 days after the end of the month to which the information pertains. In addition, the funds disclose their calendar quarter-end portfolio holdings on troweprice.com 15 calendar days after each quarter. Under certain conditions, up to 5% of a fund’s holdings may be included in this portfolio list without being individually identified. Generally, securities would not be individually identified if they are being actively bought or sold and it is determined that the quarter-end disclosure of the holding could be harmful to the fund. A security will not be excluded for these purposes from a fund’s quarter-end holdings disclosure for more than one year. Money funds also disclose their month-end portfolio holdings on troweprice.com five business days after each month. The quarter-end portfolio holdings will remain on the website for one year and the month-end money fund portfolio holdings will remain on the website for six months. Each fund also discloses its 10 largest holdings on troweprice.com on the seventh business day after each month-end. These holdings are listed in alphabetical order along with the aggregate percentage of the fund’s total assets that these 10 holdings represent. Each monthly top 10 list will remain on the website for six months. A description of T. Rowe Price’s policies and procedures with respect to the disclosure of portfolio information is available in the Statement of Additional Information and through troweprice.com.

The Financial Highlights table, which provides information about the fund’s financial history, is based on a single share outstanding throughout the periods shown. The table is part of the fund’s financial statements, which are included in its annual report and are incorporated by reference into the Statement of Additional Information (available upon request). The total returns in the table represent the rate that an investor would have earned or lost on an investment in the fund (assuming reinvestment of all dividends and distributions and no payment of any applicable account or redemption fees). The financial statements in the annual report were audited by the fund’s independent registered public accounting firm, PricewaterhouseCoopers LLP.

Financial Highlights

* Per share amounts calculated using average shares outstanding method.

a Excludes expenses permanently waived of 0.05%, 0.06%, 0.06%, 0.06%, and 0.06%, of average net assets for the years ended May 31, 2015, May 31, 2014, May 31, 2013, May 31, 2012, and May 31, 2011, respectively, related to investments in T. Rowe Price mutual funds.

Table of Contents

SUMMARY

Investment Objective

The fund seeks to maximize total return through income and capital appreciation.

Fees and Expenses

This table describes the fees and expenses that you may pay if you buy and hold shares of the fund.

Fees and Expenses of the Fund’s F Class

a The figures shown in the fee table do not match the “Ratio of expenses to average net assets” shown in the Financial Highlights table, as that figure does not include acquired fund fees and expenses and excludes expenses permanently waived as a result of investments in other T. Rowe Price mutual funds.

b T. Rowe Price Associates, Inc. is required to permanently waive a portion of its management fee charged to the fund in an amount sufficient to fully offset any acquired fund fees and expenses related to investments in other T. Rowe Price mutual funds. The amount of the waiver will vary each fiscal year in proportion to the amount invested in other T. Rowe Price mutual funds. The T. Rowe Price funds would be required to seek regulatory approval in order to terminate this arrangement.

Example This example is intended to help you compare the cost of investing in the fund with the cost of investing in other mutual funds. The example assumes that you invest $10,000 in the fund for the time periods indicated and then redeem all of your shares at the end of those periods. The example also assumes that your investment has a 5% return each year and that the fund’s operating expenses remain the same. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Portfolio Turnover The fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the example, affect the fund’s performance. During the most recent fiscal year, the fund’s portfolio turnover rate was 149.9% of the average value of its portfolio.

Investments, Risks, and Performance

Principal Investment Strategies The fund intends to invest at least 65% of its net assets (including any borrowings for investment purposes) in a “core” portfolio of investment grade, U.S. dollar-denominated fixed income securities that may include, but are not limited to, debt securities issued by the U.S. government and its agencies, corporate bonds, and mortgage-backed and asset-backed securities. Normally, the fund will also maintain a “plus” portion of its portfolio in other sectors of the bond market, including high yield, non-U.S. dollar-denominated, and emerging market securities, to seek additional returns.

Under normal conditions, the fund expects to maintain an effective duration (which measures the portfolio’s price sensitivity to interest rate changes) within +/-20% of the Barclays U.S. Aggregate Bond Index. As of July 31, 2015, the effective duration of this index was 5.50 years; however, it will change over time.

Individual bond investments in the core portfolio will be rated investment grade, with a minimum credit quality of BBB- (or an equivalent rating). Ratings will be determined, at the time of purchase, by at least one credit rating agency or, if not so rated, a comparable rating by T. Rowe Price. If a security is split-rated (i.e., at least one below investment grade rating and at least one investment grade rating), the higher rating will be used. The fund, in the aggregate, will seek to maintain a weighted average credit rating of A- or better, based on the weighted average credit quality of the fund’s portfolio securities.

The plus portion of the fund’s portfolio may consist of below investment-grade bonds, also known as “junk” bonds, issued by companies in the U.S. and other developed countries (not to exceed 20% of the fund’s net assets), below investment-grade emerging market debt securities (not to exceed 10% of the fund’s net assets), non-U.S. dollar-denominated securities (not to exceed 20% of the fund’s net assets), and convertible and preferred securities (not to exceed 10% of the fund’s net assets), as well as other investments. The fund may invest in currencies without holding any bonds or other securities denominated in those particular currencies.

The fund may continue to hold an investment in its core portfolio that is downgraded to below investment grade after purchase. If such rating downgrades cause high yield exposure to exceed 20% of net assets or below investment-grade emerging market securities to exceed 10% of net assets, the fund will seek to reduce its exposure within a reasonable period of time.

While most assets will typically be invested in bonds, the fund also uses interest rate futures and forward currency exchange contracts in keeping with the fund’s objectives. Interest rate futures would typically be used to manage the fund’s exposure to interest rate changes or to adjust portfolio duration. Forward currency exchange contracts would be used to gain exposure to certain currencies expected to increase or decrease in value relative to other currencies or to protect the fund’s foreign bond holdings from adverse currency movements relative to the U.S. dollar.

The fund may sell holdings for a variety of reasons, such as to adjust the portfolio’s average maturity, duration, or credit quality or to shift assets into and out of higher-yielding or lower-yielding securities or different sectors.

Principal Risks As with any mutual fund, there is no guarantee that the fund will achieve its objective. The fund’s share price fluctuates, which means you could lose money by investing in the fund. The principal risks of investing in this fund are summarized as follows:

Active management risk The fund is subject to the risk that the investment adviser’s judgments about the attractiveness, value, or potential appreciation of the fund’s investments may prove to be incorrect. If the investments selected and strategies employed by the fund fail to produce the intended results, the fund could underperform other funds with similar objectives and investment strategies.

Fixed income markets risk Economic and other market developments can adversely affect fixed income securities markets. At times, participants in these markets may develop concerns about the ability of certain issuers of debt securities to make timely principal and interest payments, or they may develop concerns about the ability of financial institutions that make markets in certain debt securities to facilitate an orderly market. Those concerns could cause increased volatility and reduced liquidity in particular securities or in the overall fixed income markets and the related derivatives markets. A lack of liquidity or other adverse credit market conditions may hamper the fund’s ability to sell the debt securities in which it invests or to find and purchase suitable debt instruments.

Interest rate risk This is the risk that a rise in interest rates will cause the price of a fixed rate debt security to fall. Generally, securities with longer maturities or durations and funds with longer weighted average maturities or durations carry greater interest rate risk. The fund may be subject to a greater risk of rising interest rates due to the current period of historically low rates and the effect of potential government fiscal policy initiatives and resulting market reaction to those initiatives.

Credit risk This is the risk that an issuer of a debt security could suffer an adverse change in financial condition that results in a payment default, security downgrade, or inability to meet a financial obligation. The fund’s exposure to credit risk is increased to the extent the fund invests in noninvestment-grade “junk” bonds. Junk bonds should be considered speculative as they carry greater risk of default and erratic price swings due to adverse changes in the credit quality of the issuer.

Liquidity risk This is the risk that the fund may not be able to sell a holding in a timely manner at a desired price. Reduced liquidity in the bond markets can result from a number of events, such as significant trading activity, reductions in bond inventory, and rapid or unexpected changes in interest rates. Less liquid markets could lead to greater price volatility and limit the fund’s ability to sell a holding at a suitable price.

Foreign investing risk This is the risk that the fund’s investments in foreign securities may be adversely affected by local, political, social, and economic conditions overseas, greater volatility, reduced liquidity, or decreases in foreign currency values relative to the U.S. dollar.

Emerging markets risk The risks of foreign investing are heightened for securities of issuers in emerging market countries. Emerging market countries tend to have economic structures that are less diverse and mature, and political systems that are less stable, than those of developed countries. In addition to all of the risks of investing in foreign developed markets, emerging markets are more susceptible to governmental interference, local taxes being imposed on foreign investments, restrictions on gaining access to sales proceeds, and less liquid and less efficient trading markets.

Currency risk Because the fund may invest in securities issued in foreign currencies, the fund is subject to the risk that it could experience losses based solely on the weakness of foreign currencies versus the U.S. dollar and changes in the exchange rates between such currencies and the U.S. dollar. Any attempts at currency hedging may not be successful and could cause the fund to lose money.

Prepayment risk and extension risk Prepayment risk is the risk that the principal on mortgage-backed securities, other asset-backed securities or any debt security with an embedded call option may be prepaid at any time, which could reduce the security’s yield and market value. The rate of prepayments tends to increase as interest rates fall, which could cause the average maturity of the portfolio to shorten. Extension risk may result from a rise in interest rates, which tends to make mortgage-backed securities, asset-backed securities, and other callable debt securities more volatile.

Convertible securities and preferred stock risk Investments in convertible securities and preferred stocks subject the fund to risks associated with both equity and fixed income securities, depending on the price of the underlying security and the conversion price. Stocks generally fluctuate in value more than bonds and tend to move in cycles, with periods of rising and falling prices. The value of a stock may decline due to general weakness in the stock market or because of factors that affect a particular company or industry. Convertible securities are typically issued by smaller-capitalized companies whose stock prices are more volatile than companies that have access to more conventional means of raising capital. Preferred stock holders would be paid after corporate bondholders, but before common stockholders, in the event a company fails.

Derivatives risk The fund’s use of interest rate futures and forward currency exchange contracts exposes the fund to additional volatility in comparison to investing directly in bonds and other debt securities. These instruments can be illiquid and difficult to value, may involve leverage so that small changes produce disproportionate losses for the fund and, if not traded on an exchange, are subject to the risk that a counterparty to the transaction will fail to meet its obligations under

the derivatives contract. The fund’s principal use of derivatives involves the risk that anticipated interest rate movements and changes in currency values and currency exchange rates will not be accurately predicted, which could significantly harm the fund’s performance.

Performance The bar chart showing calendar year returns and the average annual total returns table provide some indications of the risks of investing in the fund by showing how much returns can differ from year to year and how the fund’s average annual returns for certain periods compare with the returns of a relevant broad-based market index, as well as with the returns of other comparative indexes that have investment characteristics similar to those of the fund. The fund’s performance information represents only past performance (before and after taxes) and is not necessarily an indication of future results.

The fund can also experience short-term performance swings, as shown by the best and worst calendar quarter returns during the years depicted.

The fund’s return for the six months ended 6/30/15 was 0.21%.

In addition, the average annual total returns table shows hypothetical after-tax returns to demonstrate how taxes paid by a shareholder may influence returns. After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. After-tax returns shown are not relevant to investors who hold their fund shares through tax-deferred arrangements, such as a 401(k) account or individual retirement account. In some cases, the figure shown for “returns after taxes on distributions and sale of fund shares” may be higher than the figure shown for “returns before taxes” because the calculations assume the investor received a tax deduction for any loss incurred on the sale of shares.

* Returns as of 9/30/10.

Updated performance information is available through troweprice.com or may be obtained by calling 1-800-638-8790.

Management

Investment Adviser T. Rowe Price Associates, Inc. (T. Rowe Price)

Purchase and Sale of Fund Shares

You must purchase, redeem, and exchange shares of the fund through your financial intermediary. Generally, the fund’s minimum initial investment requirement is $2,500 and the fund’s minimum subsequent investment requirement is $100, although the investment minimums may be modified or waived for financial intermediaries submitting orders on behalf of their customers. You should check with your financial intermediary to determine the investment minimums that apply to your account.

Tax Information

The fund declares dividends daily and pays them on the first business day of each month. Any capital gains are declared and paid annually, usually in December. Redemptions or exchanges of fund shares and distributions by the fund, whether or not you reinvest these amounts in additional fund shares, may be taxed as ordinary income or capital gains unless you invest through a tax-deferred account (although you may be taxed upon withdrawal from such account).

Payments to Broker-Dealers and Other Financial Intermediaries

If you purchase shares of the fund through a broker-dealer or other financial intermediary (such as a bank), the fund and its related companies may pay the intermediary for the sale of fund shares and related services. These payments may create a conflict of interest by influencing the broker-dealer or other intermediary and your salesperson to recommend the fund over another investment. Ask your salesperson or visit your financial intermediary’s website for more information.

The following policies and procedures generally apply to F Class accounts in the T. Rowe Price family of funds.

How and When Shares Are Priced

The share price, also called the “net asset value,” for each share class of a fund is calculated at the close of the New York Stock Exchange (normally 4 p.m. ET) each day that the exchange is open for business. To calculate the net asset value, the fund’s assets are valued and totaled; liabilities are subtracted; and each class’ proportionate share of the balance, called net assets, is divided by the number of shares outstanding of that class. Market values are used to price portfolio holdings for which market quotations are readily available. Market values generally reflect the prices at which securities actually trade or represent prices that have been adjusted based on evaluations and information provided by the fund’s pricing services. If a market value for a security is not available or normal valuation procedures are deemed to be inappropriate, the fund will make a good faith effort to assign a fair value to the security by taking into account various factors and methodologies that have been approved by the fund’s Board of Directors/Trustees. This value may differ from the value the fund receives upon sale of the securities. Amortized cost is used to price securities held by money funds and certain other debt securities held by a fund. Investments in other mutual funds are valued at the closing net asset value per share of the mutual fund on the day of valuation.

Non-U.S. equity securities are valued on the basis of their most recent closing market prices at 4 p.m. ET, except under the circumstances described below. Most foreign markets close before 4 p.m. ET. For example, the most recent closing prices for securities traded in certain Asian markets may be as much as 15 hours old at 4 p.m. ET. If a fund determines that developments between the close of a foreign market and the close of the New York Stock Exchange will, in its judgment, materially affect the value of some or all of the fund’s securities, the fund will adjust the previous closing prices to reflect what it believes to be the fair value of the securities as of 4 p.m. ET. In deciding whether to make these adjustments, the fund reviews a variety of factors, including developments in foreign markets, the performance of U.S. securities markets, and the performance of instruments trading in U.S. markets that represent foreign securities and baskets of foreign securities. The fund may also fair value certain securities or a group of securities in other situations—for example, when a particular foreign market is closed but the fund is open. For a fund that has investments in securities that are primarily listed on foreign exchanges that trade on weekends or other days when the fund does not price its shares, the fund’s net asset

value may change on days when shareholders will not be able to purchase or redeem the fund’s shares.

The fund uses various pricing services to provide it with closing market prices and information used for adjusting those prices and to value most fixed income securities. The fund cannot predict how often it will use closing prices and how often it will adjust those prices. As a means of evaluating its fair value process, the fund routinely compares closing market prices, the next day’s opening prices in the same markets, and adjusted prices. The fund also evaluates a variety of factors when assigning fair values to private placements and other restricted securities. Other mutual funds may adjust the prices of their securities by different amounts or assign different fair values than the fair value that the fund assigns to the same security.

How Your Purchase, Sale, or Exchange Price Is Determined

F Class shares are intended for purchase through financial advisors and various third-party intermediaries, including brokers, banks, insurance companies, retirement plan recordkeepers, and others. Contact your intermediary to find out how to purchase, sell, or exchange your shares; trade deadlines; and other applicable procedures for these transactions. The intermediary may charge a fee for its services.

The fund may have an agreement with your intermediary that permits the intermediary to accept orders on behalf of the fund until the close of the New York Stock Exchange (normally 4 p.m. ET). To ensure that your request is submitted in correct form, please refer to “Account Requirements and Transaction Information” in Section 4. In such cases, if your order is received by the intermediary in correct form by the close of the New York Stock Exchange and is transmitted to T. Rowe Price and paid for in accordance with the agreement, the transaction will be priced at the next net asset value computed after the intermediary received your order. If the fund does not have an agreement with your intermediary, T. Rowe Price must receive the request in correct form from your intermediary by the close of the New York Stock Exchange in order for your transaction to be priced at that business day’s net asset value.

When authorized by the fund, certain financial institutions or retirement plans purchasing fund shares on behalf of customers or plan participants through T. Rowe Price Financial Institution Services or T. Rowe Price Retirement Plan Services may place a purchase order unaccompanied by payment. Payment for these shares must be received by the time designated by the fund (not to exceed the period established for settlement under applicable regulations). If payment is not received by this time, the order may be canceled. The financial institution or retirement plan is responsible for any costs or losses incurred by the fund or T. Rowe Price if payment is delayed or not received.

Note: The time at which transactions and shares are priced and the time until which orders are accepted by the fund or an intermediary may be changed in case of an emergency or if the New York Stock Exchange closes at a time other than 4 p.m. ET.

In the event of an emergency closing, a fund’s shareholders will receive the next share price calculated by the fund. There may be times when you are unable to contact us by telephone or access your account online due to extreme market activity, the unavailability of the T. Rowe Price website, or other circumstances. Should this occur, your order must still be placed and accepted by T. Rowe Price prior to the time the New York Stock Exchange closes to be priced at that business day’s net asset value.

How Proceeds Are Received

Normally, the fund transmits proceeds to intermediaries for redemption orders received in correct form on either the next or third business day after receipt, depending on the arrangement with the intermediary. Under certain circumstances, and when deemed to be in a fund’s best interests, proceeds may not be sent to intermediaries for up to seven calendar days after receipt of the redemption order. You must contact your intermediary about procedures for receiving your redemption proceeds.

Contingent Redemption Fee

Short-term trading can disrupt a fund’s investment program and create additional costs for long-term shareholders. For these reasons, certain T. Rowe Price funds, listed in the following table, assess a fee on redemptions (including exchanges out of a fund), which reduces the proceeds from such redemptions by the amounts indicated:

Redemption fees are paid to a fund to deter short-term trading, offset costs, and protect the fund’s long-term shareholders. Subject to the exceptions described on the following pages, all persons holding shares of a T. Rowe Price fund that imposes a redemption fee are subject to the fee, whether the person is holding shares directly with a T. Rowe Price fund; through a retirement plan for which T. Rowe Price serves as recordkeeper; or indirectly through an intermediary (such as a broker, bank, or investment adviser), recordkeeper for retirement plan participants, or other third party.

Computation of Holding Period

When an investor sells shares of a fund that assesses a redemption fee, T. Rowe Price will use the “first-in, first-out” method to determine the holding period for the shares sold. Under this method, the date of redemption or exchange will be compared with the earliest purchase date of shares held in the account. The day after the date of your purchase is considered Day 1 for purposes of computing the holding period. A redemption fee will be charged on shares sold on or before the end of the required holding period. For example, if you redeem your shares on or before the 90th day

after the date of purchase, you will be assessed the redemption fee. If you purchase shares through an intermediary, consult your intermediary to determine how the holding period will be applied.

Transactions Not Subject to Redemption Fees

The T. Rowe Price funds will not assess a redemption fee with respect to certain transactions. As of the date of this prospectus, the following shares of T. Rowe Price funds will not be subject to redemption fees:

· Shares redeemed through an automated, systematic withdrawal plan;

· Shares redeemed through or used to establish certain rebalancing, asset allocation, wrap, and advisory programs, as well as non-T. Rowe Price fund-of-funds products, if approved in writing by T. Rowe Price;

· Shares purchased through the reinvestment of dividends or capital gain distributions;*

· Shares converted from one share class to another share class of the same fund;*

· Shares redeemed automatically by a fund to pay fund fees or shareholder account fees (e.g., for failure to meet account minimums);

· Shares purchased by rollover or changes of account registration within the same fund;*

· Shares redeemed to return an excess contribution from a retirement account;

· Shares of T. Rowe Price funds purchased by another T. Rowe Price fund and shares purchased by discretionary accounts managed by T. Rowe Price or one of its affiliates (please note that other shareholders of the investing T. Rowe Price fund are still subject to the policy);

· Certain transactions in defined benefit and non-qualified plans, subject to prior approval by T. Rowe Price;

· Shares that are redeemed in-kind;

· Shares transferred to T. Rowe Price or a third-party intermediary acting as a service provider when the age of the shares cannot be determined systematically; * and

· Shares redeemed in retirement plans or other products that restrict trading to no more frequently than once per quarter, if approved in writing by T. Rowe Price.

* Subsequent exchanges of these shares into funds that assess redemption fees will subject such shares to the fee.

Redemption Fees on Shares Held in Retirement Plans

If shares are held in a retirement plan, redemption fees generally will be assessed on shares redeemed by exchange only if they were originally purchased by exchange. However, redemption fees may apply to transactions other than exchanges depending on how shares of the plan are held at T. Rowe Price or how the fees are applied by your plan’s recordkeeper. To determine which of your transactions are subject to redemption fees, you should contact T. Rowe Price or your plan recordkeeper.

Omnibus Accounts

If your shares are held through an intermediary in an omnibus account, T. Rowe Price relies on the intermediary to assess the redemption fee on underlying

shareholder accounts. T. Rowe Price seeks to enter into agreements with intermediaries establishing omnibus accounts that require the intermediary to assess the redemption fees. There are no assurances that T. Rowe Price will be successful in identifying all intermediaries or that the intermediaries will properly assess the fees.

Certain intermediaries may not apply the exemptions previously listed to the redemption fee policy; all redemptions by persons trading through such intermediaries may be subject to the fee. Certain intermediaries may exempt transactions not listed from redemption fees, if approved by T. Rowe Price. Persons redeeming shares through an intermediary should check with their respective intermediary to determine which transactions are subject to the fees.

Each fund intends to qualify to be treated each year as a regulated investment company under Subchapter M of the Internal Revenue Code of 1986, as amended. In order to qualify, a fund must satisfy certain income, diversification, and distribution requirements. A regulated investment company is not subject to U.S. federal income tax at the portfolio level on income and gains from investments that are distributed to shareholders. However, if a fund were to fail to qualify as a regulated investment company, and was ineligible to or otherwise did not cure such failure, the result would be fund-level taxation and, consequently, a reduction in income available for distribution to the fund’s shareholders.

To the extent possible, all net investment income and realized capital gains are distributed to shareholders.

Dividends and Other Distributions

Dividend and capital gain distributions are reinvested in additional fund shares in your account unless you select another option on your New Account form. Reinvesting distributions results in compounding, which allows you to receive dividends and capital gain distributions on an increasing number of shares.

Interest will not accrue on amounts represented by uncashed distributions or redemption checks.

The following table provides details on dividend payments:

Bond fund shares will earn dividends through the date of redemption. Shares redeemed on a Friday or prior to a holiday will continue to earn dividends until the next business day. Generally, if you redeem all of your bond fund shares at any time during the month, you will also receive all dividends earned through the date of redemption in the same check. When you redeem only a portion of your bond fund shares, all dividends accrued on those shares will be reinvested, or paid in cash, on the next dividend payment date. The funds do not pay dividends in fractional cents. Any dividend amount earned for a particular day on all shares held that is one-half of one cent or greater (for example, $0.016) will be rounded up to the next whole cent ($0.02), and any amount that is less than one-half of one cent (for example, $0.014) will be rounded down to the nearest whole cent ($0.01). Please note that, if the dividend payable on all shares held is less than one-half of one cent for a particular day, no dividend will be earned for that day.

If you purchase and sell your shares through an intermediary, consult your intermediary to determine when your shares begin and stop accruing dividends as the information previously described may vary.

Capital Gain Payments

A capital gain or loss is the difference between the purchase and sale price of a security. If a fund has net capital gains for the year (after subtracting any capital losses), they are usually declared and paid in December to shareholders of record on a specified date that month. If a second distribution is necessary, it is paid the following year.

Tax Information

You should contact your intermediary for the tax information that will be sent to you and reported to the Internal Revenue Service.

If you invest in the fund through a tax-deferred account, such as an individual retirement account, you will not be subject to tax on dividends and distributions from the fund or the sale of fund shares if those amounts remain in the tax-deferred account. You may receive a Form 1099-R or other Internal Revenue Service forms, as applicable, if any portion of the account is distributed to you.

If you invest in the fund through a taxable account, you generally will be subject to tax when:

· You sell fund shares, including an exchange from one fund to another.

· The fund makes dividend or capital gain distributions.

For individual shareholders, a portion of ordinary dividends representing “qualified dividend income” received by the fund may be subject to tax at the lower rates applicable to long-term capital gains rather than ordinary income. You may report it as “qualified dividend income” in computing your taxes, provided you have held the fund shares on which the dividend was paid for more than 60 days during the 121-day period beginning 60 days before the ex-dividend date. Ordinary dividends that

do not qualify for this lower rate are generally taxable at the investor’s marginal income tax rate. This includes the portion of ordinary dividends derived from interest, short-term capital gains, distributions from nonqualified foreign corporations, and dividends received by the fund from stocks that were on loan. Little, if any, of the ordinary dividends paid by the bond fund F Classes is expected to qualify for this lower rate.

For corporate shareholders, a portion of ordinary dividends may be eligible for the 70% deduction for dividends received by corporations to the extent the fund’s income consists of dividends paid by U.S. corporations. Little, if any, of the ordinary dividends paid by the bond fund F Classes is expected to qualify for this deduction.

A 3.8% Medicare contribution tax is imposed on net investment income, including interest, dividends, and capital gains of U.S. individuals with income exceeding $200,000 (or $250,000 if married filing jointly) and of estates and trusts.

Taxes on Fund Redemptions

When you sell shares in any fund, you may realize a gain or loss. An exchange from one fund to another in a taxable account is also a sale for tax purposes.

Taxes on Fund Distributions

The tax treatment of a capital gain distribution is determined by how long the fund held the portfolio securities, not how long you held the shares in the fund. Short-term (one year or less) capital gain distributions are taxable at the same rate as ordinary income, and gains on securities held more than one year are taxed at the lower rates applicable to long-term capital gains. If you realized a loss on the sale or exchange of fund shares that you held six months or less, your short-term capital loss must be reclassified as a long-term capital loss to the extent of any long-term capital gain distributions received during the period you held the shares. For funds investing in foreign securities, distributions resulting from the sale of certain foreign currencies, currency contracts, and the foreign currency portion of gains on debt securities are taxed as ordinary income. Net foreign currency losses may cause monthly or quarterly dividends to be reclassified as a return of capital.

The tax status of certain distributions may be recharacterized on year-end tax forms, such as your Form 1099-DIV. Distributions made by a fund may later be recharacterized for federal income tax purposes—for example, from taxable ordinary income dividends to returns of capital, which are generally nontaxable but reduce your tax basis in the fund’s shares. Recharacterization of distributions may occur for a number of reasons, including the recharacterization of income received from underlying investments, such as REITs, and distributions that exceed taxable income due to losses from foreign currency transactions or other investment transactions. Certain funds, including international bond funds and funds that invest in REITs, are more likely to recharacterize a portion of their distributions as a result of their investments.

If a fund qualifies and elects to pass through nonrefundable foreign income taxes paid to foreign governments during the year, your portion of such taxes will be reported to you as taxable income. However, you may be able to claim an offsetting credit or deduction on your tax return for those amounts. There can be no assurance that a fund will meet the requirements to pass through foreign income taxes paid.

If a fund holds Build America Bonds or other qualified tax credit bonds and elects to pass through the corresponding interest income and any available tax credits, you will need to report both the interest income and any such tax credits as taxable income. You may be able to claim the tax credits on your federal tax return as an offset to your income tax (including alternative minimum tax) liability, but the tax credits are generally not refundable. There is no assurance, however, that a fund will elect to pass through the income and credits.

Taxable distributions are subject to tax whether reinvested in additional shares or received in cash.

Tax Consequences of Hedging

Entering into certain transactions involving options, futures, swaps, and forward currency exchange contracts may result in the application of the mark-to-market and straddle provisions of the Internal Revenue Code. These provisions could result in a fund being required to distribute gains on such transactions even though it did not close the contracts during the year or receive cash to pay such distributions. The fund may not be able to reduce its distributions for losses on such transactions to the extent of unrealized gains in offsetting positions.

Tax Effect of Buying Shares Before an Income Dividend or Capital Gain Distribution

If you buy shares shortly before or on the record date—the date that establishes you as the person to receive the upcoming distribution—you may receive a portion of the money you just invested in the form of a taxable distribution. Therefore, you may wish to find out a fund’s record date before investing. In addition, a fund’s share price may, at any time, reflect undistributed capital gains or income and unrealized appreciation, which may result in future taxable distributions. Such distributions can occur even in a year when the fund has a negative return.

Purchase Conditions for Intermediaries

Nonpayment If the fund does not receive payment for an order in a timely manner, your purchase may be canceled. The intermediary will be responsible for any losses or expenses incurred by the fund or transfer agent. The funds and their agents have the right to reject or cancel any purchase, exchange, or redemption due to nonpayment.

U.S. Dollars All purchases must be paid for in U.S. dollars; checks must be drawn on U.S. banks.

Sale (Redemption) Conditions

Holds on Immediate Redemptions: 10-Day Hold If an intermediary sells shares that it just purchased and paid for by check or Automated Clearing House transfer, the fund will process the redemption but will generally delay sending the proceeds for up to 10 calendar days to allow the check or transfer to clear. (The 10-day hold does not apply to purchases paid for by bank wire.)

Large Redemptions Large redemptions can adversely affect a portfolio manager’s ability to implement a fund’s investment strategy by causing the premature sale of securities that would otherwise be held longer. Therefore, the fund reserves the right (without prior notice) to pay all or part of redemption proceeds with securities from the fund’s portfolio rather than in cash (“redemption in-kind”). If this occurs, the securities will be selected by the fund in its absolute discretion, and the redeeming shareholder or account will be responsible for disposing of the securities and bearing any associated costs and risks (for example, market risks until the securities are disposed of).

Excessive and Short-Term Trading Policy

Excessive transactions and short-term trading can be harmful to fund shareholders in various ways, such as disrupting a fund’s portfolio management strategies, increasing a fund’s trading costs, and negatively affecting its performance. Short-term traders in funds that invest in foreign securities may seek to take advantage of developments overseas that could lead to an anticipated difference between the price of the funds’ shares and price movements in foreign markets. While there is no assurance that T. Rowe Price can prevent all excessive and short-term trading, the Boards of Directors/Trustees of the T. Rowe Price funds have adopted the following trading limits that are designed to deter such activity and protect the funds’ shareholders. The funds may revise their trading limits and procedures at any time as the Boards of Directors/Trustees deem necessary or appropriate to better detect short-term trading that may adversely affect the funds, to comply with applicable regulatory requirements, or to impose additional or alternative restrictions.

Subject to certain exceptions, each T. Rowe Price fund restricts a shareholder’s purchases (including through exchanges) into a fund account for a period of 30 calendar days after the shareholder has redeemed or exchanged out of that same fund account (the “30-Day Purchase Block”). The calendar day after the date of redemption is considered Day 1 for purposes of computing the period before another purchase may be made.

General Exceptions As of the date of this prospectus, the following types of transactions generally are not subject to the 30-Day Purchase Block:

· Shares purchased or redeemed in money funds;

· Shares purchased or redeemed through a systematic purchase or withdrawal plan;

· Checkwriting redemptions from bond and money funds;

· Shares purchased through the reinvestment of dividends or capital gain distributions;

· Shares redeemed automatically by a fund to pay fund fees or shareholder account fees;

· Transfers and changes of account registration within the same fund;

· Shares purchased by asset transfer or direct rollover;

· Shares purchased or redeemed through IRA conversions and recharacterizations;

· Shares redeemed to return an excess contribution from a retirement account;

· Transactions in Section 529 college savings plans;

· Certain transactions in defined benefit and non-qualified plans, subject to prior approval by T. Rowe Price;

· Shares converted from one share class to another share class in the same fund; and

· Shares of T. Rowe Price funds that are purchased by another T. Rowe Price fund, including shares purchased by T. Rowe Price fund-of-funds products and shares purchased by discretionary accounts managed by T. Rowe Price or one of its affiliates (please note that shareholders of the investing T. Rowe Price fund are still subject to the policy).

Transactions in certain rebalancing, asset allocation, wrap programs, and other advisory programs, as well as non-T. Rowe Price fund-of-funds products, may also be exempt from the 30-Day Purchase Block, subject to prior written approval by T. Rowe Price.

In addition to restricting transactions in accordance with the 30-Day Purchase Block, T. Rowe Price may, in its discretion, reject (or instruct an intermediary to reject) any purchase or exchange into a fund from a person (which includes individuals and entities) whose trading activity could disrupt the management of the fund or dilute the value of the fund’s shares, including trading by persons acting collectively (e.g., following the advice of a newsletter). Such persons may be barred, without prior notice, from further purchases of T. Rowe Price funds for a period longer than 30 calendar days or permanently.

Intermediary Accounts If you invest in T. Rowe Price funds through an intermediary, you should review the intermediary’s materials carefully or consult with the intermediary directly to determine the trading policy that will apply to your trades in the funds as well as any other rules or conditions on transactions that may apply. If T. Rowe Price is unable to identify a transaction placed through an intermediary as exempt from the excessive trading policy, the 30-Day Purchase Block may apply.

Intermediaries may maintain their underlying accounts directly with the fund, although they often establish an omnibus account (one account with the fund that represents multiple underlying shareholder accounts) on behalf of their customers. When intermediaries establish omnibus accounts in the T. Rowe Price funds, T. Rowe Price is not able to monitor the trading activity of the underlying

shareholders. However, T. Rowe Price monitors aggregate trading activity at the intermediary (omnibus account) level in an attempt to identify activity that indicates potential excessive or short-term trading. If it detects suspicious trading activity, T. Rowe Price may contact the intermediary and may request personal identifying information and transaction histories for some or all underlying shareholders (including plan participants, if applicable). If T. Rowe Price believes that excessive or short-term trading has occurred, it will instruct the intermediary to impose restrictions to discourage such practices and take appropriate action with respect to the underlying shareholder, including restricting purchases for 30 calendar days or longer. There is no assurance that T. Rowe Price will be able to properly enforce its excessive trading policies for omnibus accounts. Because T. Rowe Price generally relies on intermediaries to provide information and impose restrictions for omnibus accounts, its ability to monitor and deter excessive trading will be dependent upon the intermediaries’ timely performance of their responsibilities.

T. Rowe Price may allow an intermediary or other third party to maintain restrictions on trading in the T. Rowe Price funds that differ from the 30-Day Purchase Block. An alternative excessive trading policy would be acceptable to T. Rowe Price if it believes that the policy would provide sufficient protection to the T. Rowe Price funds and their shareholders that is consistent with the excessive trading policy adopted by the funds’ Boards of Directors/Trustees.

Retirement Plan Accounts If shares are held in a retirement plan, generally the
30-Day Purchase Block applies only to shares redeemed by a participant-directed exchange to another fund. However, the 30-Day Purchase Block may apply to transactions other than exchanges depending on how shares of the plan are held at T. Rowe Price or the excessive trading policy applied by your plan’s recordkeeper. An alternative excessive trading policy may apply to the T. Rowe Price funds where a retirement plan has its own policy deemed acceptable to T. Rowe Price. You should contact T. Rowe Price or your plan recordkeeper to determine which of your transactions are subject to the funds’ 30-Day Purchase Block or an alternative policy.

There is no guarantee that T. Rowe Price will be able to identify or prevent all excessive or short-term trades or trading practices.

Signature Guarantees

An intermediary may need to obtain a Medallion signature guarantee in certain situations, such as:

· Written requests to redeem over $5 million;

· Remitting redemption proceeds to any person, address, or bank account not on file; or

· Changing the account registration or broker-dealer of record for an account.

Intermediaries should consult their T. Rowe Price Financial Institution Services representative for specific requirements.

The signature guarantee must be obtained from a financial institution that is a participant in a Medallion signature guarantee program. You can obtain a Medallion signature guarantee from most banks, savings institutions, broker-dealers, and other guarantors acceptable to T. Rowe Price. When obtaining a Medallion signature guarantee, please discuss with the guarantor the dollar amount of your proposed transaction. It is important that the level of coverage provided by the guarantor’s stamp covers the dollar amount of the transaction or it may be rejected. We cannot accept guarantees from notaries public or organizations that do not provide reimbursement in the case of fraud.

The F Class is a share class of its respective T. Rowe Price fund and is not a separate mutual fund. The fund’s F Class shares are intended for purchase through financial advisors and certain third-party intermediaries, including brokers, banks, insurance companies, retirement plan recordkeepers, and other financial intermediaries that provide various administrative services. F Class shares are generally not available to intermediaries that would make the fund available to their customers through a “supermarket” platform.

The F Class has adopted a program that authorizes the funds to make administrative fee payments to intermediaries (at a rate of up to 0.15% of average daily net assets per year) for various services they perform. The administrative fee payment program allows the funds to pay retirement plans, retirement plan recordkeepers, insurance companies, banks, and broker-dealers for transfer agency, recordkeeping, and other administrative services provided on behalf of the fund. These services may include transmitting net purchase and redemption orders to T. Rowe Price; maintaining separate records reflecting shareholders’ transactions and share balances; preparing and delivering shareholder confirmations, statements, and tax forms; processing dividend payments and other distributions; and supporting telephone and Internet inquiries in connection with these services.

Some broker-dealers or other financial intermediaries that are eligible to purchase F Class shares of T. Rowe Price Institutional Funds may also be eligible to purchase the original share class of those funds (the “Institutional Class”). The Institutional Class shares require a much higher initial investment but have lower expenses than F Class shares because the Institutional Class does not participate in the administrative fee payment program. The payment of the administrative fee by the F Class creates a potential conflict of interest by influencing the broker-dealer or other intermediary to purchase F Class shares instead of Institutional Class shares. If this happens, you will incur higher expenses than if your intermediary had purchased Institutional Class shares on your behalf (assuming your intermediary would qualify to purchase Institutional Class shares). Ask your salesperson for more

information regarding the eligibility of your financial intermediary to purchase Institutional Class shares.

How is the fund organized?

T. Rowe Price Institutional Income Funds, Inc. (the “Corporation”) was incorporated in Maryland in 2000. Currently, the Corporation consists of six series, each representing a separate pool of assets with different investment objectives. Each series is an “open-end management investment company,” or mutual fund. Mutual funds pool money received from shareholders and invest it to try to achieve specified objectives. In 2010, the Institutional Core Plus Fund issued a separate class of shares known as the F Class.

What is meant by “shares”?

As with all mutual funds, investors purchase shares when they put money in a fund. These shares are part of a fund’s authorized capital stock, but share certificates are not issued.

Each share and fractional share entitles the shareholder to:

· Receive a proportional interest in income and capital gain distributions. For funds with multiple share classes, the income dividends for each share class will generally differ from those of other share classes to the extent that the expense ratios of the classes differ.

· Cast one vote per share on certain fund matters, including the election of fund directors/trustees, changes in fundamental policies, or approval of material changes to the fund’s management contract. Shareholders of each class have exclusive voting rights on matters affecting only that class.

Do T. Rowe Price funds have annual shareholder meetings?

The funds are not required to hold regularly scheduled shareholder meetings. To avoid unnecessary costs to fund shareholders, shareholder meetings are only held when certain matters, such as changes in fundamental policies or elections of directors/trustees, must be decided. In addition, shareholders representing at least 10% of all eligible votes may call a special meeting for the purpose of voting on the removal of any fund director or trustee. If a meeting is held and you cannot attend, you can vote by proxy. Before the meeting, the fund will send or make available to you proxy materials that explain the matters to be decided and include instructions on voting by mail, telephone, or the Internet.

Who runs the fund?

General Oversight

The fund is governed by a Board of Directors (the “Board”) that meets regularly to review fund investments, performance, expenses, and other business affairs. The Board elects the fund’s officers. At least 75% of Board members are independent of T. Rowe Price and its affiliates (the “Firm”).

All decisions regarding the purchase and sale of fund investments are made by T. Rowe Price—specifically by the fund’s portfolio manager.

Investment Adviser

T. Rowe Price is the fund’s investment adviser and oversees the selection of the fund’s investments and management of the fund’s portfolio. T. Rowe Price is a SEC-registered investment adviser that provides investment management services to individual and institutional investors, and sponsors and serves as adviser and sub-adviser to registered investment companies, institutional separate accounts, and common trust funds. The address for T. Rowe Price is 100 East Pratt Street, Baltimore, Maryland 21202. As of June 30, 2015, the Firm had approximately $773 billion in assets under management and provided investment management services for more than 9 million individual and institutional investor accounts.

Portfolio Management

T. Rowe Price has established an Investment Advisory Committee with respect to the fund. The committee chairman has day-to-day responsibility for managing the fund’s portfolio and works with the committee in developing and executing the fund’s investment program. The members of the committee are as follows: Brian J. Brennan, Chairman, Steve Boothe, Christopher P. Brown, Michael J. Conelius, Steven C. Huber, Arif Husain, Andrew J. Keirle, Robert M. Larkins, Andrew C. McCormick, Daniel O. Shackelford, Ju Yen Tan, David A. Tiberii, and Mark J. Vaselkiv. The following information provides the year that the chairman first joined the Firm and the chairman’s specific business experience during the past five years (although the chairman may have had portfolio management responsibilities for a longer period). Mr. Brennan has been chairman of the committee since the fund’s inception in 2004. He joined the Firm in 2000 and his investment experience dates from 1986. He has served as a portfolio manager with the Firm throughout the past five years. The Statement of Additional Information provides additional information about the portfolio manager’s compensation, other accounts managed by the portfolio manager, and the portfolio manager’s ownership of fund shares.

The Management Fee

The fund pays the investment adviser an annual all-inclusive management fee of 0.40% based on the fund’s average daily net assets. The management fee is calculated and accrued daily and it includes investment management services and ordinary, recurring operating expenses, but does not cover interest, expenses related to borrowing, taxes, and brokerage, or nonrecurring extraordinary expenses. In addition

to the management fee, the F Class may make administrative fee payments to eligible intermediaries at a rate of up to 0.15% of average daily net assets per year. The amount of administrative fee payments paid by the F Class for the prior fiscal year, based on the class’s average daily net assets, is reflected in the fee table in Section 1 under “Other expenses” and shown in a footnote to the Financial Highlights table. The actual rates paid may vary among intermediaries and rates paid to particular intermediaries may be higher than the overall amount reflected in the fee table and Financial Highlights table, up to the maximum rate of 0.15% of the fund’s average daily net assets per year.

A discussion about the factors considered by the Board and its conclusions in approving the fund’s investment management contract with T. Rowe Price appears in the fund’s annual report to shareholders for the period ended May 31.

The fund could generate higher income and have greater potential for capital appreciation than bond funds that invest substantially all of their assets in investment-grade bonds, but with less volatility than a bond fund that focuses on high yield bonds. The addition of high yield bonds, bank loans, convertibles, and foreign securities provides the opportunity for capital growth and higher income. In addition, these securities could help to moderate the fund’s price decline when interest rates rise because they may be less sensitive to U.S. interest rate movements.

In addition to investing in a wide array of bonds and other debt instruments, the fund also uses interest rate futures and forward currency exchange contracts as part of its principal investment strategies. Interest rate futures are typically used to manage the fund’s duration and overall interest rate exposure, but may also be used as a tool to help manage significant cash flows into and out of the fund. Forward currency exchange contracts are used to protect the fund’s non-U.S. dollar-denominated holdings from adverse currency movements by hedging the fund’s foreign currency exposure back to the U.S. dollar, as well as to gain exposure to a currency believed to be appreciating in value versus other currencies.

The fund’s yield will vary. A fund’s yield is the annualized dividends earned for a given period (typically 30 days for bond funds), divided by the share price at the end of the period. A fund’s total return includes distributions from income and capital gains and the change in share price for a given period.

Credit quality refers to a bond issuer’s expected ability to make all required interest and principal payments on time. Because highly-rated issuers represent less risk, they can borrow at lower interest rates than less-creditworthy issuers. Therefore, a fund investing in high-quality securities should have a lower yield than an otherwise comparable fund investing in lower-quality securities.

Every bond has a stated maturity date when the issuer must repay the bond’s entire principal value to the investor. However, many bonds are “callable,” meaning their principal can be repaid before the stated maturity date. Bonds are most likely to be called when interest rates are falling because the issuer can refinance at a lower rate, just as a homeowner refinances a mortgage when interest rates fall. In that environment, a bond’s “effective maturity” is usually its nearest call date. For example, the rate at which homeowners pay down their mortgage principal determines the effective maturity of mortgage-backed bonds.

A bond fund has no real maturity, but it does have a weighted average maturity and a weighted average effective maturity. Each of these numbers is an average of the stated or effective maturities of the underlying bonds, with each bond’s maturity “weighted” by the percentage of fund assets it represents. (The fund’s average effective maturity takes into consideration the possibility that an issuer may call a bond before its maturity date or, with respect to a pool of mortgages, the likelihood of prepayments on the mortgages.) Some funds utilize effective maturities rather than stated maturities when managing a fund to a certain average maturity, which provides additional flexibility in portfolio management.

Duration is a calculation that seeks to measure the price sensitivity of a bond or a bond fund to changes in interest rates. It is expressed in years, like maturity, but it is a better indicator of price sensitivity than maturity because it takes into account the time value of cash flows generated over the bond’s life. Future interest and principal payments are discounted to reflect their present value and then multiplied by the number of years they will be received to produce a value expressed in years–the duration. “Effective” duration takes into account call features and sinking fund payments that may shorten a bond’s life.

Since duration can be computed for bond funds, you can estimate the effect of interest rate fluctuations on share prices by multiplying fund duration by an expected change in interest rates. For example, the price of a bond fund with a duration of five years would be expected to fall approximately 5% if rates rose by one percentage point. A bond fund with a longer duration will generally be more sensitive to changes in interest rates than a bond fund with a shorter duration. (A bond fund’s duration is shown in its shareholder report.)

As with any mutual fund, there is no guarantee the fund will achieve its objective. The fund’s share price fluctuates, which means you could lose money when you sell your shares of the fund. The income level of the fund will change with market conditions and interest rate levels. Some particular risks affecting the fund include the following:

Market risk The market price of investments owned by a fund may go up or down, sometimes rapidly or unpredictably. Fund investments may decline in value due to factors affecting the overall markets, or particular industries or sectors. The value of a holding may decline due to general market conditions which are not specifically

related to a particular issuer, such as real or perceived adverse economic conditions, changes in the general outlook for an issuer’s financial condition, changes in interest or currency rates, or adverse investor sentiment generally. The value of a holding may also decline due to factors which affect a particular industry or industries, such as labor shortages or increased production costs and competitive conditions within an industry. A fund may experience heavy redemptions that could cause the fund to liquidate its assets at inopportune times or at a loss or depressed value, which could cause the value of your investment in the fund to unexpectedly decline.

Interest rate risk This is the risk that prices of bonds and other fixed income securities will increase as interest rates fall and that prices will decrease as interest rates rise (bond prices and interest rates usually move in opposite directions). Prices fall because the bonds and notes in the fund’s portfolio become less attractive to other investors when securities with higher yields become available. Even mortgage-backed securities and other securities whose principal and interest payments are guaranteed can decline in price if interest rates rise. Generally, securities with longer maturities and funds with longer weighted average maturities have greater interest rate risk. As a result, in a rising interest rate environment, the net asset value of a fund with a longer weighted average maturity typically decreases at a faster rate than the net asset value of a fund with a shorter weighted average maturity. If the fund purchases longer-maturity bonds and interest rates rise unexpectedly, the fund’s share price could decline.

Credit risk This is the risk that an issuer of a debt security held by the fund will default (fail to make scheduled payments), potentially reducing the fund’s income and share price. Credit risk is increased when a portfolio security is downgraded or the perceived creditworthiness of an issuer or counterparty deteriorates.

Investment-grade (AAA through BBB, or an equivalent rating) securities should have a relatively lower risk of encountering financial problems and a relatively higher probability of future payments. However, securities rated BBB or below (or an equivalent rating) are more susceptible to adverse economic conditions and may have speculative characteristics. Securities rated below investment grade (“junk” or high yield bonds) should be regarded as speculative because their issuers are more susceptible to financial setbacks and recession than more creditworthy companies. High yield bond issuers include small companies lacking the history or capital to merit investment-grade status, former blue-chip companies downgraded because of financial problems, and firms with heavy debt loads. If the fund invests in securities whose issuers develop unexpected credit problems, the fund’s share price could decline.

The fund may continue to hold a security that has been downgraded or has lost its investment-grade rating after purchase.

The fund’s exposure to credit risk is greater than that of a Treasury fund or one with all high-quality bonds, but should be less than that of a fund focusing only on high

yield “junk” bonds. Higher-quality bond prices are affected primarily by changes in interest rate levels, but high yield bond prices are affected by other factors as well: changes in a company’s financial situation, economic forecasts, stock market conditions, technical market analysis, and overall market psychology that can lead to the kind of volatility associated with stocks. High yield bonds are generally less liquid than high-quality bonds, meaning that large transactions can cause substantial price changes.

Prepayment risk This is the risk that a fund investing in mortgage-backed securities, certain asset-backed securities, and other debt securities that have embedded call options can be negatively impacted when interest rates fall because borrowers tend to refinance and prepay principal. Receiving increasing prepayments in a falling interest rate environment causes the average maturity of the portfolio to shorten, reducing its potential for price gains. It also requires the fund to reinvest proceeds at lower interest rates, which reduces the fund’s total return and yield, and could result in a loss if bond prices fall below the level that the fund paid for them.

Extension risk This is the risk that a rise in interest rates or lack of refinancing opportunities can cause a fund’s average maturity to lengthen unexpectedly due to a drop in expected prepayments of mortgage-backed securities, asset-backed securities, and callable debt securities. This would increase a fund’s sensitivity to rising rates and its potential for price declines.

Foreign investing risk To the extent a fund holds foreign securities, it will be subject to special risks, whether the securities are denominated in U.S. dollars or foreign currencies. These risks include potentially adverse local, political, social, and economic conditions overseas, greater volatility, lower liquidity, and the possibility that foreign currencies will decline against the dollar, lowering the value of securities denominated in those currencies and possibly a fund’s share price. Foreign currencies held directly by the fund could decline in value and lower the fund’s share price. These risks are heightened for a fund’s investments in emerging markets, which are more susceptible to governmental interference, less efficient trading markets, and the imposition of local taxes or restrictions on gaining access to sales proceeds for foreign investors.

Emerging markets risk The fund’s investments in emerging markets (including frontier markets) are subject to the risk of abrupt and severe price declines. The economic and political structures of developing or emerging market countries, in most cases, do not compare favorably with the U.S. or other developed countries in terms of wealth and stability, and their financial markets often lack liquidity. These economies are less developed, can be overly reliant on particular industries, and more vulnerable to the ebb and flow of international trade, trade barriers, and other protectionist or retaliatory measures. Sanctions and other intergovernmental actions are more likely to be undertaken against an emerging market country, which could result in the devaluation of the country’s currency, a downgrade in the country’s credit rating, and a decline in the value and liquidity of securities issued by the

country’s government and by companies located in or doing business in the country. Sanctions could result in the immediate freeze of securities issued by an emerging market company or government, which would impair the ability of a fund to buy, sell, or receive proceeds from the sanctioned securities. Some countries have legacies of hyperinflation and currency devaluations versus the U.S. dollar (which adversely affect returns to U.S. investors). Significant devaluations have occurred in recent years in various emerging market countries. Governments of some emerging market countries have defaulted on their bonds, and investors in this sector must be prepared for similar events in the future.

Liquidity risk This is the risk that a fund may not be able to sell a holding in a timely manner at a desired price. Sectors of the bond market can experience sudden downturns in trading activity. During periods of reduced market liquidity, the spread between the price at which a security can be bought and the price at which it can be sold can widen, and the fund may not be able to sell a holding readily at a price that reflects what the fund believes it should be worth. Less liquid securities can also become more difficult to value. Liquidity risk may be the result of, among other things, the reduced number and capacity of broker-dealers to make a market in fixed income securities or the lack of an active market. The potential for liquidity risk may be magnified by a rising interest rate environment or other circumstances where selling activity from fixed income investors may be higher than normal, potentially causing increased supply in the market.

Derivatives risk The fund’s use of interest rate futures and forward currency exchange contracts exposes the fund to additional volatility in comparison to investing directly in bonds and other debt instruments. These instruments can experience reduced liquidity and become difficult to value, and any of these instruments not traded on an exchange are subject to the risk that a counterparty to the transaction will fail to meet its obligations under the derivatives contract. The use of these instruments involves the risks that anticipated interest rate movements and changes in currency movements will not be accurately predicted.

Efforts to reduce risk The portfolio manager may mitigate but not eliminate risk through one or more of the following:

· Thorough credit research performed by T. Rowe Price analysts;

· Extensive diversification, which helps limit the fund’s exposure to any one industry or issuer;

· Variations in the amount of assets invested in various types of securities; and

· Employing an active sell discipline to reduce unwanted securities.

Additional strategies and risks In addition to the fund’s normal investments, the fund may employ other strategies that are not considered part of its principal investment strategies. Such investments may include other securities and, to a limited extent, other types of derivatives than those described in the fund’s principal strategies. For instance, in addition to bonds with customary settlement periods, the

fund may purchase or sell mortgage-backed securities on a delayed delivery or forward commitment basis through the “to-be-announced” (TBA) market. With TBA transactions, the particular securities to be delivered are not identified at the trade date but the delivered securities must meet specified terms and standards. Although the particular TBA securities must meet industry-accepted “good delivery” standards, there can be no assurance that a security purchased on a forward commitment basis will ultimately be issued or delivered by the counterparty. During the settlement period, the fund will still bear the risk of any decline in the value of the security to be delivered. Whether or not the fund takes delivery of the securities at the termination date of a TBA transaction, it will nonetheless be exposed to changes in the value of the underlying investments during the term of the agreement.

A derivative involves risks different from, and possibly greater than, the risks associated with investing directly in the assets on which the derivative is based. Derivatives can be highly volatile, illiquid, and difficult to value. Changes in the value of a derivative may not properly correlate with changes in the value of the underlying asset, reference rate, or index. A fund could be exposed to significant losses if it is unable to close a derivatives position due to the lack of a liquid trading market. Derivatives involve the risk that a counterparty to the derivatives agreement will fail to make required payments or comply with the terms of the agreement. There is also the possibility that limitations or trading restrictions may be imposed by an exchange or government regulation, which could adversely impact the value and liquidity of a derivatives contract subject to such regulation.

Recent regulations have changed the requirements related to the use of certain derivatives. Some of these new regulations have limited the availability of certain derivatives and made their use by funds more costly. It is expected that additional changes to the regulatory framework will occur, but the extent and impact of additional new regulations are not certain at this time.

The Statement of Additional Information contains more detailed information about the fund and its investments, operations, and expenses.

This section takes a detailed look at some of the types of fund securities and the various kinds of investment practices that may be used in day-to-day portfolio management. Fund investments are subject to further restrictions and risks described in the Statement of Additional Information.

Shareholder approval is required to substantively change fund investment objectives. Shareholder approval is also required to change certain investment restrictions noted in the following section as “fundamental policies.” Portfolio managers also follow certain “operating policies” that can be changed without shareholder approval.

Fund holdings in certain kinds of investments cannot exceed maximum percentages as set forth in this prospectus and the Statement of Additional Information. For instance, there are limitations regarding fund investments in certain types of derivatives. While these restrictions provide a useful level of detail about fund investments, investors should not view them as an accurate gauge of the potential risk of such investments. For example, in a given period, a 5% investment in derivatives could have a significantly greater impact on a fund’s share price than its weighting in the portfolio. The net effect of a particular investment depends on its volatility and the size of its overall return in relation to the performance of all other fund investments.

Certain investment restrictions, such as a required minimum or maximum investment in a particular type of security, are measured at the time a fund purchases a security. The status, market value, maturity, credit quality, or other characteristics of a fund’s securities may change after they are purchased, and this may cause the amount of a fund’s assets invested in such securities to exceed the stated maximum restriction or fall below the stated minimum restriction. If any of these changes occur, it would not be considered a violation of the investment restriction and will not require the sale of an investment if it was proper at the time the investment was made (this exception does not apply to a fund’s borrowing policy or liquidity policy). However, purchases by a fund during the time it is above or below the stated percentage restriction would be made in compliance with applicable restrictions.

Changes in fund holdings, fund performance, and the contribution of various investments to fund performance are discussed in the shareholder reports.

Portfolio managers have considerable discretion in choosing investment strategies and selecting securities they believe will help achieve fund objectives.

Types of Portfolio Securities

In seeking to meet its investment objective, fund investments may be made in any type of security or instrument (including certain potentially high-risk derivatives described in this section) whose investment characteristics are consistent with its investment program. The following pages describe various types of fund holdings and investment management practices.

Diversification As a fundamental policy, the fund will not purchase a security if, as a result, with respect to 75% of its total assets, more than 5% of the fund’s total assets would be invested in securities of a single issuer or more than 10% of the outstanding voting securities of the issuer would be held by the fund. These limitations do not apply to fund purchases of securities issued or guaranteed by the U.S. government, its agencies, or instrumentalities.

Bonds

A bond is an interest-bearing security. The issuer has a contractual obligation to pay interest at a stated rate on specific dates and to repay principal (the bond’s face value)

on a specified date. An issuer may have the right to redeem or “call” a bond before maturity, and the investor may have to reinvest the proceeds at lower market rates. Bonds can be issued by U.S. and foreign governments, states, and municipalities, as well as a wide variety of companies.

A bond’s annual interest income, set by its coupon rate, is usually fixed for the life of the bond. Its yield (income as a percent of current price) will fluctuate to reflect changes in interest rate levels. A bond’s price usually rises when interest rates fall and vice versa, so its yield generally stays consistent with current market conditions.

Conventional fixed rate bonds offer a coupon rate for a fixed maturity with no adjustment for inflation. Real rate of return bonds also offer a fixed coupon but include ongoing inflation adjustments for the life of the bond.

Bonds may be unsecured (backed by the issuer’s general creditworthiness only) or secured (also backed by specified collateral). Bonds include asset- and mortgage-backed securities.

Certain bonds have floating or variable interest rates that are adjusted periodically based on a particular index. These interest rate adjustments tend to minimize fluctuations in the bonds’ principal values. The maturity of certain floating rate securities may be shortened under certain specified conditions.

Bond investments may include Build America Bonds issued by state and local governments to finance capital expenditures for which they otherwise could issue tax-exempt governmental bonds. Unlike most other municipal obligations, interest received on Build America Bonds is taxable to the bondholder. These include bonds on which the issuer may receive an interest payment subsidy directly from the U.S. Treasury, known as direct pay Build America Bonds, and bonds on which the investor may receive a tax credit, known as tax credit Build America Bonds.

Common and Preferred Stocks

Stocks represent shares of ownership in a company. Generally, preferred stocks have a specified dividend rate and rank after bonds and before common stocks in their claim on income for dividend payments and on assets should the company be liquidated. After other claims are satisfied, common stockholders participate in company profits on a pro-rata basis; profits may be paid out in dividends or reinvested in the company to help it grow. Increases and decreases in earnings are usually reflected in a company’s stock price, so common stocks generally have the greatest appreciation and depreciation potential of all corporate securities. Unlike common stock, preferred stock does not ordinarily carry voting rights. While most preferred stocks pay a dividend, a fund may decide to purchase preferred stock where the issuer has suspended, or is in danger of suspending, payment of its dividend.

Operating policy The fund does not intend to invest directly in common stocks.

Convertible Securities and Warrants

Investments may be made in debt or preferred equity securities that are convertible into, or exchangeable for, equity securities at specified times in the future and according to a certain exchange ratio. Convertible bonds are typically callable by the issuer, which could in effect force conversion before the holder would otherwise choose. Traditionally, convertible securities have paid dividends or interest at rates higher than common stocks but lower than nonconvertible securities. They generally participate in the appreciation or depreciation of the underlying stock into which they are convertible, but to a lesser degree than common stock. Some convertible securities combine higher or lower current income with options and other features. Warrants are options to buy, directly from the issuer, a stated number of shares of common stock at a specified price anytime during the life of the warrants (generally, two or more years). Warrants have no voting rights, pay no dividends, and can be highly volatile. In some cases, the redemption value of a warrant could be zero.

Operating policy The fund may invest up to 10% of net assets in preferred stocks and securities that are convertible into, or which carry warrants for, common stocks or other equity securities. Under normal conditions, the fund does not expect to directly purchase common stocks. Any shares of common stock that are received through a reorganization, restructuring, exercise, exchange, conversion, or similar action will be sold within a reasonable timeframe taking into consideration market conditions and any legal restrictions.

Foreign Securities

Investments may be made in foreign securities. Foreign securities could include non-U.S. dollar-denominated securities traded outside of the U.S. and dollar-denominated securities of foreign issuers traded in the U.S. (such as Yankee bonds). Investing in foreign securities involves special risks that can increase the potential for losses. These include exposure to potentially adverse local, political, social, and economic developments such as war, political instability, hyperinflation, currency devaluations, and overdependence on particular industries; government interference in markets such as nationalization and exchange controls, expropriation of assets, or imposition of punitive taxes; the imposition of international trade and capital barriers, and other protectionist or retaliatory measures; potentially lower liquidity and higher volatility; possible problems arising from accounting, disclosure, settlement, and regulatory practices and legal rights that differ from U.S. standards; and the chance that fluctuations in foreign exchange rates will decrease the investment’s value (favorable changes can increase its value). These risks are heightened for a fund’s investments in emerging markets.

Operating policy There is no limit on fund investments in U.S. dollar-denominated debt securities issued by foreign issuers, foreign branches of U.S. banks, and U.S. branches of foreign banks. The fund may also invest up to 20% of net assets (excluding reserves) in non-U.S. dollar-denominated debt securities.

Mortgage-Backed Securities

A fund may invest in a variety of mortgage-backed securities. Mortgage lenders pool individual home mortgages with similar characteristics to back a certificate or bond, which is sold to investors such as the fund. Interest and principal payments generated by the underlying mortgages are passed through to the investors. The “big three” issuers are the Government National Mortgage Association, the Federal National Mortgage Association, and the Federal Home Loan Mortgage Corporation. Government National Mortgage Association certificates are backed by the full faith and credit of the U.S. government, while others, such as the Federal National Mortgage Association and Federal Home Loan Mortgage Corporation certificates, are only supported by the ability to borrow from the U.S. Treasury or by the credit of the agency. (Since September 2008, the Federal National Mortgage Association and the Federal Home Loan Mortgage Corporation have operated under conservatorship of the Federal Housing Finance Agency, an independent federal agency.) Private mortgage bankers and other institutions also issue mortgage-backed securities.

Mortgage-backed securities are subject to scheduled and unscheduled principal payments as homeowners pay down or prepay their mortgages. As these payments are received, they must be reinvested when interest rates may be higher or lower than on the original mortgage security. Therefore, these securities are not an effective means of locking in long-term interest rates. In addition, when interest rates fall, the rate of mortgage prepayments, including refinancings, tends to increase. Refinanced mortgages are paid off at face value or “par,” causing a loss for any investor who may have purchased the security at a price above par. In such an environment, this risk limits the potential price appreciation of these securities and can negatively affect a fund’s net asset value. When interest rates rise, the prices of mortgage-backed securities can be expected to decline. In addition, when interest rates rise and prepayments slow, the effective duration of mortgage-backed securities extends, resulting in increased price volatility.

Operating policy Other than stripped mortgage securities, there is no limit on fund investments in mortgage-backed securities.

Other types of mortgage-backed securities in which the fund may invest include:

Collateralized Mortgage Obligations Collateralized mortgage obligations are debt securities that are fully collateralized by a portfolio of mortgages or mortgage-backed securities including Government National Mortgage Association, Federal National Mortgage Association, Federal Home Loan Mortgage Corporation, and non-agency-backed mortgages. All interest and principal payments from the underlying mortgages are passed through to the collateralized mortgage obligations in such a way as to create different classes with varying risk characteristics, payment structures, and maturity dates. Collateralized mortgage obligation classes may pay fixed or variable rates of interest, and certain classes have priority over others with respect to the receipt of prepayments and allocation of defaults.

Stripped Mortgage Securities Stripped mortgage securities are created by separating the interest and principal payments generated by a pool of mortgage-backed securities or a collateralized mortgage obligation to create additional classes of securities. Generally, one class receives interest-only payments and another receives principal-only payments. Unlike other mortgage-backed securities and principal-only strips, the value of interest-only strips tends to move in the same direction as interest rates. A fund can use interest-only strips as a hedge against falling prepayment rates (when interest rates are rising) and/or in an unfavorable market environment. Principal-only strips can be used as a hedge against rising prepayment rates (when interest rates are falling) and/or in a favorable market environment. Interest-only strips and principal-only strips are acutely sensitive to interest rate changes and to the rate of principal prepayments.

A rapid or unexpected increase in prepayments can severely depress the price of interest-only strips, while a rapid or unexpected decrease in prepayments could have the same effect on principal-only strips. Of course, under the opposite conditions these securities may appreciate in value. These securities can be very volatile in price and may have less liquidity than most other mortgage-backed securities. Certain non-stripped collateralized mortgage obligation classes may also exhibit these qualities, especially those that pay variable rates of interest that adjust inversely with, and more rapidly than, short-term interest rates. In addition, if interest rates rise rapidly and prepayment rates slow more than expected, certain collateralized mortgage obligation classes, in addition to losing value, can exhibit characteristics of long-term securities and become more volatile. There is no guarantee that a fund’s investments in collateralized mortgage obligations, interest-only strips, or principal-only strips will be successful, and a fund’s total return could be adversely affected as a result.

Operating policy Fund investments in stripped mortgage securities are limited to 5% of total assets.

Commercial Mortgage-Backed Securities Commercial mortgage-backed securities are securities created from a pool of commercial mortgage loans, such as loans for hotels, shopping centers, office buildings, and apartment buildings. Interest and principal payments from the loans are passed on to the investor according to a schedule of payments. Credit quality depends primarily on the quality of the loans themselves and on the structure of the particular deal. Generally, deals are structured with senior and subordinate classes. The degree of subordination is determined by the rating agencies who rate the individual classes of the structure. Commercial mortgages are generally structured with prepayment penalties, which greatly reduce prepayment risk to the investor. However, the value of these securities may change because of actual or perceived changes in the creditworthiness of the individual borrowers, their tenants, the servicing agents, or the general state of commercial real estate.

Asset-Backed Securities

An underlying pool of assets, such as credit card or automobile trade receivables or corporate loans or bonds, backs these bonds and provides the interest and principal payments to investors. On occasion, the pool of assets may also include a swap obligation, which is used to change the cash flows on the underlying assets. As an example, a swap may be used to allow floating rate assets to back a fixed rate obligation. Credit quality depends primarily on the quality of the underlying assets, the level of any credit support provided by the structure or by a third-party insurance wrap, and the credit quality of the swap counterparty, if any. The underlying assets (i.e., loans) are sometimes subject to prepayments, which can shorten the security’s effective maturity and may lower its return. The value of these securities also may change because of actual or perceived changes in the creditworthiness of the individual borrowers, the originator, the servicing agent, the financial institution providing the credit support, or the swap counterparty. The fund will invest the loan proceeds in additional securities and other assets consistent with its investment program.

High Yield, High-Risk Bonds

The price and yield of lower-quality (high yield, high-risk) bonds, commonly referred to as “junk” bonds, and below investment-grade emerging market bonds, can be expected to fluctuate more than the price and yield of higher-quality bonds. Because these bonds are rated below BBB (or an equivalent rating) or are in default, they are regarded as predominantly speculative with respect to the issuer’s continuing ability to meet principal and interest payments. Successful investment in lower-medium- and low-quality bonds involves greater investment risk and is highly dependent on T. Rowe Price’s credit analysis. A real or perceived economic downturn or higher interest rates could cause a decline in high yield bond prices by lessening the ability of issuers to make principal and interest payments. These bonds are often thinly traded and can be more difficult to sell and value accurately than high-quality bonds. Because objective pricing data may be less available, judgment may play a greater role in the valuation process. In addition, the entire high yield bond market can experience sudden and sharp price swings due to a variety of factors, including changes in economic forecasts, stock market activity, large or sustained sales by major investors, a high-profile default, or just a change in the market’s psychology. This type of volatility is usually associated more with stocks than bonds, but “junk” bond investors should be prepared for it.

Operating policy The fund may invest up to 20% of net assets in “junk” bonds of issuers in the U.S. and other developed countries, and may invest up to 10% of net assets in below investment-grade emerging market debt.

Loan Participations and Assignments

The fund may make investments through the purchase or execution of a privately negotiated note or loan, or may acquire loans as an assignment from another lender that holds a direct interest in the loan or as a participation interest in another lender’s

portion of the loan. Larger loans to corporations or governments may be shared or syndicated among several lenders, usually banks. The fund could participate in such syndicates or could buy part of a loan, becoming a direct lender. These loans may often be obligations of companies or governments in financial distress or in default. These investments involve special types of risk, including those of being a lender, reduced liquidity, increased credit risk, and volatility.

Bank loans may be acquired directly through an agent acting on behalf of the lenders participating in the loan, as an assignment from another lender who holds a direct interest in the loan, or as a participation interest in another lender’s portion of the loan. An assignment typically results in the purchaser succeeding to all rights and obligations under the loan agreement between the assigning lender and the borrower. However, assignments may be arranged through private negotiations, and the rights and obligations acquired by the purchaser of an assignment may differ from, and be more limited than, those held by the assigning lender.

A participation interest is a fractional interest in a loan, issued by a lender or other financial institution. To the extent a fund invests in loans through participation interests, it will be more difficult for the fund to enforce its rights against the borrower because the fund will have established a direct contractual relationship with the seller of the participation interest but not with the borrower. When the fund invests in a loan by participation, it must rely on another party not only for the enforcement of its rights against the borrower, but also for the receipt and processing of payments due under the loan. Investing in a participation interest limits the fund’s ability to file a claim directly as a creditor in the event of the borrower’s bankruptcy.

Derivatives and Leverage

A derivative is a financial instrument whose value is derived from an underlying security, such as a stock or bond, or from a market benchmark, such as an interest rate index. Many types of investments representing a wide range of risks and potential rewards may be considered derivatives, including conventional instruments such as futures and options, as well as other potentially more complex investments such as swaps and structured notes. The use of derivatives can involve leverage. Leverage has the effect of magnifying returns, positively or negatively. The effect on returns will depend on the extent to which an investment is leveraged. For example, an investment of $1, leveraged at 2 to 1, would have the effect of an investment of $2. Leverage ratios can be higher or lower with a corresponding effect on returns. The fund may use derivatives in certain situations to help accomplish any or all of the following: to hedge against a decline in principal value, to increase yield, to manage exposure to changes in interest or currency exchange rates, to invest in eligible asset classes with greater efficiency and at a lower cost than is possible through direct investment, or to adjust portfolio duration or credit risk exposure.

While individual fund investments may involve leverage, the fund will not invest in any high-risk, highly leveraged derivative instrument that, at the time of entering into

the derivative transaction, is expected to cause the overall price volatility of the portfolio to be meaningfully greater than that of a long-term (over 10-year maturity) investment-grade bond.

Derivatives that may be used include the following instruments, as well as others that combine the risk characteristics and features of futures, options, and swaps:

Futures and Options Futures, a type of potentially high-risk derivative, are often used to manage or hedge risk because they enable the investor to buy or sell an asset in the future at an agreed-upon price. Options, another type of potentially high-risk derivative, give the investor the right (when the investor purchases the option), or the obligation (when the investor “writes” or sells the option), to buy or sell an asset at a predetermined price in the future. Futures and options contracts may be bought or sold for any number of reasons, including to manage exposure to changes in interest rates, bond prices, foreign currencies, and credit quality; as an efficient means of increasing or decreasing a fund’s exposure to a specific part or broad segment of the U.S. market or a foreign market; in an effort to enhance income; to improve risk-adjusted returns; to protect the value of portfolio securities; to serve as a cash management tool; and to adjust portfolio duration or credit risk exposure. Call or put options may be purchased or sold on securities, futures, and financial indexes. A fund may choose to continue a futures contract by "rolling over" an expiring futures contract into an identical contract with a later maturity date. This could increase the fund's transaction costs and portfolio turnover rate.

Futures contracts and options may not always be successful hedges; their prices can be highly volatile; using them could lower a fund’s total return; the potential loss from the use of futures can exceed a fund’s initial investment in such contracts; and the losses from certain options written by a fund could be unlimited.

Operating policies Initial margin deposits on futures and premiums on options used for non-hedging purposes will not exceed 5% of a fund’s net asset value. The total market value of securities covering call or put options may not exceed 25% of total assets. No more than 5% of total assets will be committed to premiums when purchasing call or put options.

Swaps Fund investments may be made in interest rate, index, total return, credit default, and other types of swap agreements, as well as options on swaps, commonly referred to as “swaptions,” and interest rate swap futures, which are instruments that provide a way to obtain swap exposure and the benefits of futures in one contract. All of these agreements are considered derivatives and, in certain cases, high-risk derivatives. Interest rate, index, and total return swaps are two-party contracts under which a fund and a counterparty, such as a broker or dealer, agree to exchange the returns (or differentials in rates of return) earned or realized on particular predetermined investments or indexes. Credit default swaps are agreements where one party (the protection buyer) will make periodic payments to another party (the protection seller) in exchange for protection against specified credit events, such as

defaults and bankruptcies related to an issuer or underlying credit instrument. Swap futures are futures contracts on interest rate swaps that enable purchasers to settle in cash at a future date at the price determined by a specific benchmark rate at the end of a fixed period. Swaps, swaptions, and swap futures can be used for a variety of purposes, including to manage a fund’s overall exposure to changes in interest or foreign currency exchange rates and credit quality; as an efficient means of adjusting a fund’s exposure to certain markets; in an effort to enhance income or total return or protect the value of portfolio securities; to serve as a cash management tool; and to adjust portfolio duration or credit risk exposure.

There are risks in the use of swaps and related instruments. Swaps could result in losses if interest or foreign currency exchange rates or credit quality changes are not correctly anticipated by a fund. Total return swaps could result in losses if the reference index, security, or investments do not perform as anticipated. Credit default swaps can increase a fund’s exposure to credit risk and could result in losses if evaluation of the creditworthiness of the counterparty, or of the company or government on which the credit default swap is based, is incorrect. The use of swaps, swaptions, and swap futures may not always be successful. Using them could lower a fund’s total return, their prices can be highly volatile, and the potential loss from the use of swaps can exceed a fund’s initial investment in such instruments. Also, the other party to a swap agreement could default on its obligations or refuse to cash out a fund’s investment at a reasonable price, which could turn an expected gain into a loss. Although there should be minimal counterparty risk associated with investments in interest rate swap futures, a fund could experience delays and/or losses due to the bankruptcy of a swap dealer through which the fund engaged in the transaction.

Operating policies A swap agreement with any single counterparty will not be entered into if the net amount owed or to be received under existing contracts with that party would exceed 5% of total assets or if the net amount owed or to be received by the fund under all outstanding swap agreements will exceed 10% of total assets. (Swap agreements that are cleared and settled through a clearinghouse, or traded on an exchange or swap execution facility, are not subject to these limits.) For swaptions, the total market value of securities covering call or put options may not exceed 25% of total assets. No more than 5% of total assets will be committed to premiums when purchasing call or put swaptions.

Hybrid Instruments Hybrid instruments (a type of potentially high-risk derivative) can combine the characteristics of securities, futures, and options. For example, the principal amount or interest rate of a hybrid could be tied (positively or negatively) to the price of some commodity, currency, security, or securities index or another interest rate (each a “benchmark”). Hybrids can be used as an efficient means of pursuing a variety of investment goals, including currency hedging, duration management, and increased total return. Hybrids may or may not bear interest or pay dividends. The value of a hybrid or its interest rate may be a multiple of a benchmark

and, as a result, may be leveraged and move (up or down) more steeply and rapidly than the benchmark. These benchmarks may be sensitive to economic and political events, such as commodity shortages and currency devaluations, which cannot be readily foreseen by the purchaser of a hybrid. Under certain conditions, the redemption value of a hybrid could be zero. Thus, an investment in a hybrid may entail significant market risks that are not associated with a similar investment in a traditional, U.S. dollar-denominated bond that has a fixed principal amount and pays a fixed rate or floating rate of interest. The purchase of hybrids also exposes the fund to the credit risk of the issuer of the hybrid. These risks may cause significant fluctuations in the net asset value of the fund.

Hybrids can have volatile prices and limited liquidity, and their use may not be successful.

Operating policy Fund investments in hybrid instruments are limited to 10% of total assets.

Currency Derivatives The fund may engage in foreign currency transactions either on a spot (cash) basis at the rate prevailing in the currency exchange market at the time or through forward currency exchange contracts, which are contracts between two counterparties to exchange one currency for another on a future date at a specified exchange rate. In addition to foreign currency forwards, futures, swaps, and options on foreign currencies may also be used to protect a fund’s foreign securities from adverse currency movements relative to the U.S. dollar, as well as to gain exposure to currencies and markets expected to increase or decrease in value relative to other currencies or securities.

The fund may attempt to hedge its exposure to potentially unfavorable currency changes. Forward currency contracts can be used to adjust the foreign exchange exposure of the fund with a view to protecting the portfolio from adverse currency movements, based on T. Rowe Price’s outlook. However, forward currency contracts can also be used in an effort to benefit from a currency believed to be appreciating in value versus other currencies. The fund may invest in non-U.S. currencies directly without holding any non-U.S. bonds or securities denominated in those currencies.

Forward currency contracts involve special risks, including, but not limited to, the potential for significant volatility in currency markets, and the risk that in certain markets, particularly emerging markets, it is not possible to engage in effective foreign currency hedging. In addition, such transactions involve the risk that currency movements will not occur as anticipated by T. Rowe Price, which could reduce a fund’s total return.

The fund may enter into foreign currency transactions under the following circumstances:

Lock In When the fund desires to lock in the U.S. dollar price on the purchase or sale of a security denominated in a foreign currency.

Cross Hedge If a particular currency is expected to decrease in value relative to another currency, the fund may sell the currency expected to decrease and purchase a currency that is expected to increase against the currency sold. The fund’s cross hedging transactions may involve currencies in which the fund’s holdings are denominated. However, the fund is not required to own securities in the particular currency being purchased or sold.

Direct Hedge If the fund seeks to eliminate substantially all of the risk of owning a particular currency or believes the portfolio could benefit from price appreciation in a given country’s bonds but did not want to hold the currency, it could employ a direct hedge back into the U.S. dollar. In either case, a fund would enter into a forward contract to sell the currency in which a portfolio security is denominated and purchase U.S. dollars at an exchange rate established at the time it initiated the contract. The cost of the direct hedge transaction may offset most, if not all, of the yield advantage offered by the foreign security, but the fund would hope to benefit from an increase (if any) in the value of the bond.

Proxy Hedge In certain circumstances, a different currency may be substituted for the currency in which the investment is denominated, as part of a strategy known as proxy hedging. In this case, the fund, having purchased a security, will sell a currency whose value is believed to be closely linked to the currency in which the security is denominated. This type of hedging entails greater risk than a direct hedge because it is dependent on a stable relationship between the two currencies paired as proxies, and that relationship may not always be maintained. The fund may also use these instruments to create a synthetic bond, which is issued in one currency with the currency component transformed into another currency.

Costs of Hedging When the fund purchases a foreign bond with a higher interest rate than is available on U.S. bonds of a similar maturity, the additional yield on the foreign bond could be substantially lessened if the fund were to enter into a direct hedge by selling the foreign currency and purchasing the U.S. dollar. This is what is known as the “cost” of hedging. A proxy hedge, which is less costly than a direct hedge, may attempt to reduce this cost through an indirect hedge back to the U.S. dollar.

It is important to note that hedging costs are treated as capital transactions and are not, therefore, deducted from a fund’s dividend distribution and are not reflected in its yield. Instead, such costs will, over time, be reflected in a fund’s net asset value per share and total return. Hedging may result in the application of the mark-to-market and straddle provisions of the Internal Revenue Code. These provisions could result in an increase (or decrease) in the amount of taxable dividends paid by a fund and could affect whether dividends paid by a fund are classified as capital gains or ordinary income.

Operating policy The fund will not commit more than 20% of its net assets to any combination of currency derivatives. The fund’s exposure to non-U.S. currencies will

not exceed 10% of its net assets when the fund does not hold any securities issued by a non-U.S. issuer.

Investments in Other Investment Companies

A fund may invest in other investment companies, including open-end funds, closed-end funds, and exchange-traded funds.

A fund may purchase the securities of another investment company to temporarily gain exposure to a portion of the market while awaiting purchase of securities or as an efficient means of gaining exposure to a particular asset class. The fund might also purchase shares of another investment company to gain exposure to the securities in the investment company’s portfolio at times when the fund may not be able to buy those securities directly. Any investment in another investment company would be consistent with the fund’s objective and investment program.

The risks of owning another investment company are generally similar to the risks of investing directly in the securities in which that investment company invests. However, an investment company may not achieve its investment objective or execute its investment strategy effectively, which may adversely affect the fund’s performance. In addition, because closed-end funds and exchange-traded funds trade on a secondary market, their shares may trade at a premium or discount to the actual net asset value of their portfolio securities and their shares may have greater volatility if an active trading market does not exist.

As a shareholder of another investment company, the fund must pay its pro-rata share of that investment company’s fees and expenses. The fund’s investments in non-T. Rowe Price investment companies are subject to the limits that apply to investments in other funds under the Investment Company Act of 1940 or under any applicable exemptive order.

A fund may also invest in certain other T. Rowe Price funds as a means of gaining efficient and cost-effective exposure to certain asset classes, provided the investment is consistent with the fund’s investment program and policies. Such an investment could allow the fund to obtain the benefits of a more diversified portfolio than might otherwise be available through direct investments in the asset class, and will subject the fund to the risks associated with the particular asset class. Examples of asset classes in which other T. Rowe Price mutual funds concentrate their investments include high yield bonds, inflation-linked securities, floating rate loans, international bonds, emerging market bonds, stocks of companies involved in activities related to real assets, and emerging market stocks. If the fund invests in another T. Rowe Price fund, the management fee paid by the fund will be reduced to ensure that the fund does not incur duplicate management fees as a result of its investment.

Illiquid Securities

Some fund holdings may be considered illiquid because they are subject to legal or contractual restrictions on resale or because they cannot be sold in the ordinary

course of business within seven days at approximately the prices at which they are valued. The determination of liquidity involves a variety of factors. Illiquid securities may include private placements that are sold directly to a small number of investors, usually institutions. Unlike public offerings, such securities are not registered with the SEC. Although certain of these securities may be readily sold (for example, pursuant to Rule 144A under the Securities Act of 1933) and therefore deemed liquid, others may have resale restrictions and be considered illiquid. The sale of illiquid securities may involve substantial delays and additional costs, and a fund may only be able to sell such securities at prices substantially lower than what it believes they are worth.

Operating policy Fund investments in illiquid securities are limited to 15% of net assets. The 15% limit on illiquid securities applies at the time of purchase and continues thereafter.

Types of Investment Management Practices

Reserve Position

A certain portion of fund assets may be held in reserves. Fund reserve positions can consist of: 1) shares of a T. Rowe Price internal money fund or short-term bond fund (which does not charge any management fees); 2) short-term, high-quality U.S. and foreign dollar-denominated money market securities, including repurchase agreements; and 3) U.S. dollar or non-U.S. dollar currencies. In order to respond to adverse market, economic, political, or other conditions, the fund may assume a temporary defensive position that is inconsistent with its principal investment objective and/or strategies and may invest, without limitation, in reserves. If a fund has significant holdings in reserves, it could compromise the fund’s ability to achieve its objectives. The reserve position provides flexibility in meeting redemptions, paying expenses and managing cash flows into a fund, and can serve as a short-term defense during periods of unusual market volatility. Non-U.S. dollar reserves are subject to currency risk.

When-Issued Securities and Forwards

A fund may purchase securities on a when-issued or delayed delivery basis or may purchase or sell securities on a forward commitment basis. There is no limit on fund investments in these securities. The price of these securities is fixed at the time of the commitment to buy, but delivery and payment take place after the customary settlement period for that type of security (often a month or more later). During the interim period, the price and yield of the securities can fluctuate, and typically no interest accrues to the purchaser. At the time of delivery, the market value of the securities may be more or less than the purchase or sale price. To the extent the fund remains fully or almost fully invested (in securities with a remaining maturity of more than one year) at the same time it purchases these securities, there will be greater fluctuations in the fund’s net asset value than if the fund did not purchase them.

Borrowing Money and Transferring Assets

A fund may borrow from banks, other persons, and other T. Rowe Price funds for temporary emergency purposes to facilitate redemption requests, or for other purposes consistent with fund policies as set forth in this prospectus and the Statement of Additional Information. Such borrowings may be collateralized with fund assets, subject to restrictions.

Fundamental policy Borrowings may not exceed 33¹/₃% of total assets. This limitation applies at the time of purchase and continues thereafter.

Operating policy A fund will not transfer portfolio securities as collateral except as necessary in connection with permissible borrowings or investments, and then such transfers may not exceed 33¹/₃% of total assets. A fund will not purchase additional securities when borrowings exceed 5% of total assets.

Lending of Portfolio Securities

A fund may lend its securities to broker-dealers, other institutions, or other persons to earn additional income. Risks include the potential insolvency of the broker-dealer or other borrower that could result in delays in recovering securities and capital losses. Additionally, losses could result from the reinvestment of collateral received on loaned securities in investments that default or do not perform as well as expected.

Fundamental policy The value of loaned securities may not exceed 33¹/₃% of total assets.

Credit Quality Considerations

The credit quality of many fund holdings is evaluated by rating agencies such as Moody’s Investors Service, Inc. (Moody’s), Standard & Poor’s Ratings Services (S&P), and Fitch Ratings (Fitch). Credit quality refers to the issuer’s ability and willingness to meet all required interest and principal payments. The highest ratings are assigned to issuers perceived to have the lowest credit risks. T. Rowe Price credit research analysts also evaluate fund holdings, including those rated by outside agencies. Other things being equal, bonds and other debt obligations with lower ratings typically have higher yields due to greater credit risk.

Credit quality ratings are not guarantees. They are estimates of an issuer’s creditworthiness and ability to make interest and principal payments as they come due. Ratings can change at any time due to actual or perceived changes in an issuer’s creditworthiness or financial fundamentals.

Bonds rated Baa and above by Moody’s, and BBB and above by S&P and Fitch, are considered to be “investment grade.” Bonds that are rated below these categories are considered to have greater credit risk and are referred to as “below investment grade” or “noninvestment grade.” Bonds rated below investment grade range from speculative to highly speculative with respect to the issuer’s ability or willingness to pay interest and repay principal. The following table summarizes the rating scales

and associated credit risk assigned by the major rating agencies. Within these categories, the rating may be modified with a symbol (such as 1, 2, and 3, or a plus or minus) to indicate whether the bond is ranked in the higher or lower end of its rating category. T. Rowe Price considers publicly available ratings but emphasizes its own credit analysis when selecting investments.

Ratings of Debt Securities

Portfolio Turnover

Turnover is an indication of frequency of trading. A fund will not generally trade in securities for short-term profits, but when circumstances warrant, securities may be purchased and sold without regard to the length of time held. Each time a fund purchases or sells a security, it incurs a cost. This cost is reflected in its net asset value but not in its operating expenses. The higher the turnover rate, the higher the transaction costs and the greater the impact on a fund’s total return. Higher turnover can also increase the possibility of taxable capital gain distributions.

Funds investing in bonds may have higher turnover than funds investing in stocks. Unlike stocks, fixed-maturity bonds require reinvestment. For funds investing in short-term securities, mortgage-backed securities, and callable debt, frequent reinvestment of principal is often required. Common trading strategies, such as mortgage dollar rolls, can increase turnover. Active investment strategies, such as

sector rotation and duration management, also necessitate more frequent trading. The fund’s portfolio turnover rates are shown in the Financial Highlights table.

Each T. Rowe Price fund’s portfolio holdings are disclosed on a regular basis in its semiannual and annual shareholder reports, and on Form N-Q, which is filed with the SEC within 60 days of the fund’s first and third fiscal quarter-end. The money funds also file detailed month-end portfolio holdings information with the SEC each month. Such information will be made available to the public 60 days after the end of the month to which the information pertains. In addition, the funds disclose their calendar quarter-end portfolio holdings on troweprice.com 15 calendar days after each quarter. Under certain conditions, up to 5% of a fund’s holdings may be included in this portfolio list without being individually identified. Generally, securities would not be individually identified if they are being actively bought or sold and it is determined that the quarter-end disclosure of the holding could be harmful to the fund. A security will not be excluded for these purposes from a fund’s quarter-end holdings disclosure for more than one year. Money funds also disclose their month-end portfolio holdings on troweprice.com five business days after each month. The quarter-end portfolio holdings will remain on the website for one year and the month-end money fund portfolio holdings will remain on the website for six months. Each fund also discloses its 10 largest holdings on troweprice.com on the seventh business day after each month-end. These holdings are listed in alphabetical order along with the aggregate percentage of the fund’s total assets that these 10 holdings represent. Each monthly top 10 list will remain on the website for six months. A description of T. Rowe Price’s policies and procedures with respect to the disclosure of portfolio information is available in the Statement of Additional Information and through troweprice.com.

The Financial Highlights table, which provides information about the fund’s F Class financial history, is based on a single share outstanding throughout the periods shown. The class’ section of the table is part of the fund’s financial statements, which are included in its annual report and are incorporated by reference into the Statement of Additional Information (available upon request). The total returns in the table represent the rate that an investor would have earned or lost on an investment in the fund’s F Class (assuming reinvestment of all dividends and distributions and no payment of any applicable account or redemption fees). The financial statements in

the annual report were audited by the fund’s independent registered public accounting firm, PricewaterhouseCoopers LLP.

Financial Highlights