MetLife Investment Funds, Inc. – ‘N-Q’ for 3/31/07 – EX-99.CERT

On:  Thursday, 5/24/07, at 1:41pm ET   ·   Effective:  5/24/07   ·   For:  3/31/07   ·   Accession #:  1193125-7-122418   ·   File #:  811-07450

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Quarterly Schedule of Portfolio Holdings of a Management Investment Company   —   Form N-Q
Filing Table of Contents

Document/Exhibit                   Description                      Pages   Size 

 1: N-Q         Metlife Investment Funds, Inc. Form N-Q for Period   135±   535K 
                          Ending 3/31/07                                         
 2: EX-99.CERT  Certifications                                         4     14K 

EX-99.CERT   —   Certifications

EX-99.CERT
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FORM N-Q CERTIFICATION  
PURSUANT TO RULE 30A-2(A) UNDER THE 1940 ACT  

I, Alan C. Leland, Jr., certify that:                                           

1. I have reviewed this report on Form N-Q of MetLife Investment Funds, Inc.;   

2. Based on my knowledge, this report does not contain any untrue statement of  
a material fact or omit to state a material fact necessary to make the    
statements made, in light of the circumstances under which such statements
  were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the schedules of investments in this report fairly    
  present in all material respects the investments of the registrant as of the
end of the fiscal quarter for which the report is filed;                  

4. The registrant's other certifying officer and I am responsible for           
 establishing and maintaining disclosure controls and procedures (as defined
in Rule 30a-3(c) under the Investment Company Act of 1940) and internal   
control over financial reporting (as defined in Rule 30a-3(d) under the   
Investment Company Act of 1940) for the registrant and have:              

a) Designed such disclosure controls and procedures, or caused such     
      disclosure controls and procedures to be designed under our supervision,
to ensure that material information relating to the registrant,   
    including its consolidated subsidiaries, is made known to us by others
 within those entities, particularly during the period in which this
report is being prepared; and                                     

  b) Designed such internal control over financial reporting, or caused such
internal control over financial reporting to be designed under our
    supervision, to provide reasonable assurance regarding the reliability
    of financial reporting and the preparation of financial statements for
external purposes in accordance with generally accepted accounting
principles; and                                                   

  c) Evaluated the effectiveness of the registrant's disclosure controls and
procedures and presented in this report our conclusions about the 
   effectiveness of the disclosure controls and procedures, as of a date
  within 90 days prior to the filing date of this report based on such
evaluation; and                                                   

   d) Disclosed in this report any change in the registrant's internal control
 over financial reporting that occurred during the registrant's most
  recent fiscal quarter that has materially affected, or is reasonably
 likely to materially affect, the registrant's internal control over
financial reporting; and                                          

5. The registrant's other certifying officer and I have disclosed to the        
registrant's auditors and the audit committee of the registrant's board of
directors (or persons performing the equivalent functions):               

a) All significant deficiencies and material weaknesses in the design or
operation of internal control over financial reporting which are  
reasonably likely to adversely                                    

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affect the registrant's ability to record, process, summarize, and
report financial information; and                                 

b) Any fraud, whether or not material, that involves management or other
employees who have a significant role in the registrant's internal
control over financial reporting.                                 

Date: May 24, 2007                  /s/ Alan C. Leland, Jr.                     
                                 -----------------------------------------
           Alan C. Leland, Jr.
                                 President, MetLife Investment Funds, Inc.

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FORM N-Q CERTIFICATION  
PURSUANT TO RULE 30A-2(A) UNDER THE 1940 ACT  

I, Peter H. Duffy, certify that:                                                

1. I have reviewed this report on Form N-Q of MetLife Investment Funds, Inc.;   

2. Based on my knowledge, this report does not contain any untrue statement of  
a material fact or omit to state a material fact necessary to make the    
statements made, in light of the circumstances under which such statements
  were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the schedules of investments in this report fairly    
  present in all material respects the investments of the registrant as of the
end of the fiscal quarter for which the report is filed;                  

4. The registrant's other certifying officer and I am responsible for           
 establishing and maintaining disclosure controls and procedures (as defined
in Rule 30a-3(c) under the Investment Company Act of 1940) and internal   
control over financial reporting (as defined in Rule 30a-3(d) under the   
Investment Company Act of 1940) for the registrant and have:              

(a) Designed such disclosure controls and procedures, or caused such      
      disclosure controls and procedures to be designed under our supervision,
to ensure that material information relating to the registrant,   
    including its consolidated subsidiaries, is made known to us by others
 within those entities, particularly during the period in which this
report is being prepared; and                                     

 (b) Designed such internal control over financial reporting, or caused such
internal control over financial reporting to be designed under our
    supervision, to provide reasonable assurance regarding the reliability
    of financial reporting and the preparation of financial statements for
external purposes in accordance with generally accepted accounting
principles; and                                                   

 (c) Evaluated the effectiveness of the registrant's disclosure controls and
procedures and presented in this report our conclusions about the 
   effectiveness of the disclosure controls and procedures, as of a date
  within 90 days prior to the filing date of this report based on such
evaluation; and                                                   

  (d) Disclosed in this report any change in the registrant's internal control
 over financial reporting that occurred during the registrant's most
  recent fiscal quarter that has materially affected, or is reasonably
 likely to materially affect, the registrant's internal control over
financial reporting; and                                          

5. The registrant's other certifying officer and I have disclosed to the        
registrant's auditors and the audit committee of the registrant's board of
directors (or persons performing the equivalent functions):               

(a) All significant deficiencies and material weaknesses in the design or 
operation of internal control over financial reporting which are  
reasonably likely to adversely                                    

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affect the registrant's ability to record, process, summarize, and
report financial information; and                                 

(b) Any fraud, whether or not material, that involves management or other 
employees who have a significant role in the registrant's internal
control over financial reporting.                                 

Date: May 24, 2007                  /s/ Peter H. Duffy                          
                                  ------------------------------------------
      Peter H. Duffy
                             Treasurer and Chief Financial Officer
                      MetLife Investment Funds, Inc.

Dates Referenced Herein

				Referenced-On Page
This ‘N-Q’ Filing		Date		First		Last			Other Filings
Filed on / Effective on:		5/24/07		2		4			None on these Dates
For Period End:		3/31/07
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