AMERICAN PERFORMANCE FUNDS
497, 1997-06-16
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                           AMERICAN PERFORMANCE FUNDS
 
                               MONEY MARKET FUNDS
 
                    AMERICAN PERFORMANCE U.S. TREASURY FUND
 
                              AMERICAN PERFORMANCE
                              CASH MANAGEMENT FUND
 
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                       SUPPLEMENT DATED JUNE 16, 1997 TO
                       PROSPECTUS DATED DECEMBER 16, 1996
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     Capitalized terms used in this Supplement and not defined have the meaning
assigned to them in the Prospectus.
 
     As of March 31, 1997, BancOklahoma Trust Company ("BOTC"), the investment
adviser to the Money Market Funds, has merged into its parent, Bank of Oklahoma,
N.A. ("BOK"). BOK serves as investment adviser to the Money Market Funds on the
same terms and at the same fees as BOTC.
 
     BOK, the investment adviser to the Cash Management Fund ("Fund"), has
entered into a new Sub-Investment Advisory Agreement dated June 16, 1997 with
AMR Investment Services, Inc. ("AMR"), the current Sub-Adviser to the Fund,
pursuant to which BOK will pay AMR a fee computed daily and paid monthly in
arrears at an annual rate not less than fifteen one-hundredths of one percent
(.15%) nor more than forty one-hundredths of one percent (.40%) of the Fund's
average daily net assets.
 
     INVESTORS SHOULD RETAIN THIS SUPPLEMENT WITH THE PROSPECTUS FOR FUTURE
REFERENCE.
 
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<PAGE>   2
 
                           AMERICAN PERFORMANCE FUNDS
                      STATEMENT OF ADDITIONAL INFORMATION
 
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                       SUPPLEMENT DATED JUNE 16, 1997 TO
          STATEMENT OF ADDITIONAL INFORMATION DATED DECEMBER 16, 1996
- --------------------------------------------------------------------------------
 
     Capitalized terms used in this Supplement and not defined have the meaning
assigned to them in the Statement of Additional Information.
 
     As of March 31, 1997, BancOklahoma Trust Company ("BOTC"), the investment
adviser to the Money Market Funds, the Equity Investment Funds, and the Bond
Investment Funds has merged into its parent, Bank of Oklahoma, N.A. ("BOK"). BOK
serves as investment adviser to the Money Market Funds, the Equity Investment
Funds, and the Bond Investment Funds on the same terms and at the same fees as
BOTC.
 
     BOK, the investment adviser to the Cash Management Fund ("Fund"), has
entered into a new Sub-Investment Advisory Agreement dated June 16, 1997 with
AMR Investment Services, Inc. ("AMR"), the current Sub-Adviser to the Fund,
pursuant to which BOK will pay AMR a fee computed daily and paid monthly in
arrears at an annual rate not less than fifteen one-hundredths of one percent
(.15%) nor more than forty one-hundredths of one percent (.40%) of the Fund's
average daily net assets.
 
     INVESTORS SHOULD RETAIN THIS SUPPLEMENT WITH THE STATEMENT OF ADDITIONAL
INFORMATION FOR FUTURE REFERENCE.
 
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