AMERICAN PERFORMANCE FUNDS
485BPOS, 2000-12-28
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<PAGE>   1
                                         Registration Nos. 33-35190 and 811-6114


As filed with the Securities and Exchange Commission on December 28, 2000



                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549

                                    FORM N-1A

REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933                    [X]
         Post-Effective Amendment No. 25                                   [X]

REGISTRATION STATEMENT UNDER THE INVESTMENT COMPANY ACT OF 1940            [X]
         Amendment No.  23


                           AMERICAN PERFORMANCE FUNDS

               (EXACT NAME OF REGISTRANT AS SPECIFIED IN CHARTER)
                    3435 STELZER ROAD, COLUMBUS, OHIO 43219

                    (ADDRESS OF PRINCIPAL EXECUTIVE OFFICES)
              REGISTRANT'S TELEPHONE NUMBER, INCLUDING AREA CODE:
                                  800-762-7085

                        Jeffrey Shiverdecker, Treasurer
                           American Performance Funds
                    3435 Stelzer Road, Columbus, Ohio 43219

                    (Name and Address of Agent for Service)

                          COPIES OF COMMUNICATIONS TO:
                          Martin E. Lybecker, Esquire
                                  Ropes & Gray
                              One Franklin Square
                  1301 K Street, N.W., Washington, D.C. 20005

APPROXIMATE DATE OF PROPOSED PUBLIC OFFERING:  CONTINUOUS


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

        [ ]  Immediately upon filing pursuant to paragraph (b)
        [X]  On January 1, 2001 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)
        [ ]  on (date) pursuant to paragraph (a)(2) of Rule 485
        [ ]  this post-effective amendment designates a new effective date for a
             previously filed post-effective amendment

TITLE OF SECURITIES BEING REGISTERED: SHARES OF BENEFICIAL INTEREST



<PAGE>   2

                                  (FLAG LOGO)

                           AMERICAN PERFORMANCE FUNDS

                                         Prospectus
                                         January 1, 2001

                                         U.S. Treasury Fund
                                         Cash Management Fund

               (APPLE BUSHEL ARTWORK)

                                         THE SECURITIES AND EXCHANGE COMMISSION
                                         HAS NOT APPROVED OR DISAPPROVED OF
                                         THESE SECURITIES OR DETERMINED WHETHER
                                         THIS PROSPECTUS IS ACCURATE OR
                                         COMPLETE. ANY REPRESENTATION TO THE

                                         CONTRARY IS UNLAWFUL.

(APPLE LOGO)
<PAGE>   3

                                  (FLAG LOGO)

                           AMERICAN PERFORMANCE FUNDS

HOW TO READ THIS PROSPECTUS

This prospectus is arranged into
different sections so that you can easily
review this important information. The
next page contains general information
you should know about investing in the
Funds.

If you would like more detailed
information about each Fund, please see
the Fund Summaries.

<TABLE>
<S>                                         <C>
TABLE OF CONTENTS
Introduction                                   1
FUND SUMMARIES                                 2
    U.S. Treasury Fund                         2
    Cash Management Fund                       6
</TABLE>

If you would like more information about
the following topics, please see:

<TABLE>
<S>                                         <C>
YOUR ACCOUNT                                  10
    Distribution/Service (12b-1) Fees         10
    Opening an Account                        10
    Buying Shares                             11
    Selling Shares                            13
    Exchanging Shares                         16
    Transaction Policies                      16
    Additional Investor Services              17
    Dividends and Capital Gains               17
    Taxes                                     18
INVESTMENT MANAGEMENT                         20
FINANCIAL HIGHLIGHTS                          21
INVESTMENT PRACTICES AND RISKS                24
GLOSSARY OF INVESTMENT TERMS                  31
</TABLE>

To obtain more information about the
American Performance Funds please refer
to the back cover of the prospectus.

January 1, 2001

(APPLE LOGO)
<PAGE>   4

    PROSPECTUS

                                       1

                                  (FLAG LOGO)

                           AMERICAN PERFORMANCE FUNDS

Introduction


                                Each Fund is a mutual fund. A mutual fund pools
                                shareholders' money and, using professional
                                investment managers, invests it in securities.
                                Before you invest, you should know a few things
                                about investing in mutual funds.



                                ALTHOUGH THE FUNDS SEEK TO PRESERVE THE VALUE OF
                                YOUR INVESTMENT AT $1 PER SHARE, YOU COULD LOSE
                                MONEY ON YOUR INVESTMENT IN A FUND. YOUR
                                INVESTMENT IN A FUND IS NOT A DEPOSIT OR AN
                                OBLIGATION OF BANK OF OKLAHOMA, N.A., ITS
                                AFFILIATES, OR ANY BANK. IT IS NOT INSURED OR
                                GUARANTEED BY THE FEDERAL DEPOSIT INSURANCE
                                CORPORATION OR ANY GOVERNMENT AGENCY.


                                Each Fund has its own investment goal and
                                strategies for reaching that goal. However, it
                                cannot be guaranteed that a Fund will achieve
                                its goal. Before investing, make sure that the
                                Fund's goal matches your own.

                                The portfolio manager invests each Fund's assets
                                in a way that the manager believes will help the
                                Fund achieve its goal. A manager's judgments
                                about the bond and stock markets, economy and
                                companies, and his method of investment
                                selection, may cause a Fund to underperform
                                other funds with similar objectives.
<PAGE>   5

    PROSPECTUS

                                       2

                                  (FLAG LOGO)

                           AMERICAN PERFORMANCE FUNDS

Fund Summaries
 MONEY MARKET FUNDS

                                U.S. Treasury Fund
                                ------------------------------------------------

                                INVESTMENT GOAL

                                Current income with liquidity and stability of
                                principal by investing in U.S. Treasury
                                obligations and repurchase agreements.

                                PRINCIPAL INVESTMENT STRATEGY

                                The U.S. Treasury Fund seeks current income with
                                liquidity and stability of principal by
                                investing exclusively in short-term obligations
                                backed by the full faith and credit of the U.S.
                                government, all of which may be subject to
                                repurchase agreements. The Fund normally invests
                                at least 65% of its assets in U.S. Treasury
                                obligations, some of which may be subject to
                                repurchase agreements. The Fund currently
                                maintains an average weighted portfolio maturity
                                of 60 days or less.

                                WHAT ARE THE MAIN RISKS OF INVESTING IN THIS
                                FUND?

                                Your investment in the Fund may be subject to
                                the following principal risks:

                                - INTEREST RATE RISK -- Interest rate risk
                                  involves the possibility that the Fund's yield
                                  will decrease due to a decline in interest
                                  rates.

                                - NET ASSET VALUE RISK -- The risk that the Fund
                                  will be unable to meet its goal of a constant
                                  $1 per share.

                                For more information about these risks please
                                refer to the section titled "Investment
                                Practices and Risks."
MATURITY:
A PORTFOLIO'S LEVEL OF INTEREST RATE EXPOSURE IS COMMONLY INDICATED BY THE TERM
MATURITY. GENERALLY SPEAKING, THE LONGER A PORTFOLIO'S MATURITY, THE GREATER ITS
LEVEL OF INTEREST RATE EXPOSURE.

(APPLE LOGO)
<PAGE>   6

    PROSPECTUS

                                       3

U.S. Treasury Fund (continued)

                                AN INVESTMENT IN THE FUND IS NOT A DEPOSIT OR AN
                                OBLIGATION OF BANK OF OKLAHOMA, N.A., ITS
                                AFFILIATES, OR ANY BANK, AND IT IS NOT INSURED
                                OR GUARANTEED BY THE FEDERAL DEPOSIT INSURANCE
                                CORPORATION OR ANY OTHER GOVERNMENT AGENCY.
                                ALTHOUGH THE FUND SEEKS TO PRESERVE THE VALUE OF
                                YOUR INVESTMENT AT $1 PER SHARE, IT IS POSSIBLE
                                TO LOSE MONEY BY INVESTING IN THE FUND.

                                PERFORMANCE INFORMATION

                                The bar chart and the performance table below
                                illustrate the risks and volatility of an
                                investment in the Fund. Of course, the Fund's
                                past performance does not necessarily indicate
                                how the Fund will perform in the future.

                                This bar chart shows changes in the Fund's
                                performance from year to year.*
                                 ANNUAL TOTAL RETURNS (PERIODS ENDED 12/31)
                                                  [BAR GRAPH]

<TABLE>
<S>                                                           <C>
                                                                                  %
                                                                                 ----
1991                                                                             5.49
1992                                                                              3.2
1993                                                                             2.49
1994                                                                             3.51
1995                                                                             5.22
1996                                                                             4.68
1997                                                                             4.86
1998                                                                             4.75
1999                                                                             4.35
</TABLE>


                                * The performance information shown above is
                                  based on a calendar year. The Fund's total
                                  return from 1/1/00 to 9/30/00 was 4.09%.


<TABLE>
                               <S>                      <C>  <C>     <C>
                               Best Quarter:            Q1   1991    1.53%
                               Worst Quarter:           Q4   1993    0.61%
</TABLE>
<PAGE>   7

U.S. Treasury Fund (continued)

    PROSPECTUS

                                       4
FUND SUMMARIES

                                This table shows the Fund's average annual total
                                returns for periods ending December 31, 1999.
                                AVERAGE ANNUAL TOTAL RETURNS (PERIODS ENDED
                                12/31/99)

<TABLE>
<CAPTION>
                                                                                Since
                                                                              Inception
                                                       1 Year      5 Years    (9/5/90)
                               --------------------------------------------------------
                               <S>                    <C>         <C>         <C>
                               U.S. Treasury Fund       4.35%       4.77%       4.39%
                               --------------------------------------------------------
</TABLE>

                                 YIELD

                                The 7-day yield for the period ended 12/31/99
                                was 4.40%.

                                You may obtain the most current yield
                                information for the Fund by calling (800)
                                762-7085.

YIELD:
ALL MUTUAL FUNDS MUST USE THE SAME FORMULAS TO CALCULATE YIELD AND EFFECTIVE
YIELD. THE FUND TYPICALLY ADVERTISES PERFORMANCE IN TERMS OF A 7-DAY YIELD AND
7-DAY EFFECTIVE YIELD AND MAY ADVERTISE TOTAL RETURN. THE 7-DAY YIELD QUOTATION
MORE CLOSELY REFLECTS CURRENT EARNINGS OF THE FUND THAN THE TOTAL RETURN
QUOTATION. THE 7-DAY EFFECTIVE YIELD WILL BE SLIGHTLY HIGHER THAN THE YIELD
BECAUSE OF THE COMPOUNDING EFFECT OF THE ASSUMED REINVESTMENT. CURRENT YIELDS
AND EFFECTIVE YIELDS FLUCTUATE DAILY AND WILL VARY DUE TO FACTORS SUCH AS
INTEREST RATES AND THE QUALITY, LENGTH OF MATURITIES, AND TYPE OF INVESTMENTS IN
THE PORTFOLIO.

(APPLE LOGO)
<PAGE>   8

    PROSPECTUS

                                       5

U.S. Treasury Fund (continued)
FEES AND EXPENSES
------------------------------------------------
Shareholder Fees
This table describes the shareholder fees that
you pay if you purchase or sell Fund shares. You
would pay these fees directly from your
investment in the Fund.
Maximum Sales Charge (Load) Imposed on Purchases
(as a percentage of offering price)           0%
Maximum Deferred Sales Charge (Load)          0%
(as a percentage of net asset value)
------------------------------------------------
Annual Fund Operating Expenses
This table describes the Fund's expenses that
you pay indirectly if you hold Fund shares.
Investment Advisory Fees                   0.40%
Distribution/Service (12b-1) Fees         0.25%*
Other Expenses                             0.31%
TOTAL ANNUAL FUND OPERATING EXPENSES      0.96%*
------------------------------------------------
* During the last fiscal year, the Distributor
  agreed to waive Distribution/Service (12b-1)
  Fees by 0.25%. This fee waiver is expected to
  continue through December 31, 2001.
  Accordingly, actual annual fund operating
  expenses were as follows:
     Investment Advisory Fees              0.40%
     Distribution/Service (12b-1) Fees     0.00%
     Other Expenses                        0.31%
     TOTAL ANNUAL FUND OPERATING EXPENSES  0.71%
---------------------------------------------------
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. The Example also
assumes that each year your investment has a 5%
return and Fund expenses remain the same.
Although your actual costs and returns may be
different, your approximate costs of investing
$10,000 in the Fund would be:

<TABLE>
<CAPTION>
   1 Year        3 Years        5 Years        10 Years
---------------------------------------------------------
<S>            <C>            <C>            <C>
    $98            $306           $531          $1,178
</TABLE>

ADDITIONAL INFORMATION

DIVIDENDS




Dividends are paid monthly.


INVESTMENT ADVISER

Bank of Oklahoma, N.A. Tulsa, OK

INCEPTION DATE

September 5, 1990

NET ASSETS AS OF NOVEMBER 30, 2000


$659 million


SUITABLE FOR IRAS

Yes

MINIMUM INITIAL INVESTMENT

$1,000

AMERICAN PERFORMANCE FUND NUMBER

002

CUSIP NUMBER

028846103

TICKER SYMBOL

APGXX
<PAGE>   9

    PROSPECTUS

                                       6
FUND SUMMARIES

                                Cash Management Fund
                                ------------------------------------------------

                                INVESTMENT GOAL

                                Current income with liquidity and stability of
                                principal by investing in high-quality,
                                short-term debt instruments.

                                PRINCIPAL INVESTMENT STRATEGY

                                The Cash Management Fund seeks current income
                                with liquidity and stability of principal by
                                investing in money market instruments which
                                present minimal credit risks. The Fund invests
                                primarily in high-quality instruments including
                                obligations issued by the U.S. government or its
                                agencies or instrumentalities, commercial paper,
                                medium-term notes, certificates of deposit, time
                                deposits, bankers' acceptances and repurchase
                                agreements. These obligations may be variable or
                                floating rate instruments or variable amount
                                master demand notes. To be considered
                                high-quality, a security must be rated in one of
                                the two highest credit quality categories for
                                short-term securities or determined by the
                                Fund's Adviser to be of comparable quality. The
                                Fund currently maintains an average weighted
                                portfolio maturity of 35 to 75 days.


                                WHAT ARE THE MAIN RISKS OF INVESTING IN THIS
                                FUND?


                                Your investment in the Fund may be subject to
                                the following principal risks:

                                - CREDIT RISK -- Credit risk is the possibility
                                  that an issuer cannot make timely interest and
                                  principal payments on its securities. Because
                                  the Fund will only invest in securities
                                  believed to pose minimal credit risk, it is
                                  unlikely that losses due to credit risk will
                                  cause a decline in the value of your
                                  investment. However, even if not severe enough
                                  to cause such a decline in principal value,
                                  credit losses could reduce the Fund's yield.
                                  In general, lower-rated securities have higher
                                  credit risks.
MATURITY:
A PORTFOLIO'S LEVEL OF INTEREST RATE EXPOSURE IS COMMONLY INDICATED BY THE TERM
MATURITY. GENERALLY SPEAKING, THE LONGER A PORTFOLIO'S MATURITY, THE GREATER ITS
LEVEL OF INTEREST RATE EXPOSURE.

(APPLE LOGO)
<PAGE>   10

    PROSPECTUS

                                       7

Cash Management Fund (continued)

                                - INTEREST RATE RISK -- Interest rate risk
                                  involves the possibility that the Fund's yield
                                  will decrease due to a decline in interest
                                  rates.

                                - NET ASSET VALUE RISK -- The risk that the Fund
                                  will be unable to meet its goal of a constant
                                  $1 per share.

                                For more information about these risks please
                                refer to the section titled "Investment
                                Practices and Risks."

                                AN INVESTMENT IN THE FUND IS NOT A DEPOSIT OR AN
                                OBLIGATION OF BANK OF OKLAHOMA, N.A., ITS
                                AFFILIATES, OR ANY BANK, AND IT IS NOT INSURED
                                OR GUARANTEED BY THE FEDERAL DEPOSIT INSURANCE
                                CORPORATION OR ANY OTHER GOVERNMENT AGENCY.
                                ALTHOUGH THE FUND SEEKS TO PRESERVE THE VALUE OF
                                YOUR INVESTMENT AT $1 PER SHARE, IT IS POSSIBLE
                                TO LOSE MONEY BY INVESTING IN THE FUND.

                                PERFORMANCE INFORMATION

                                The bar chart and the performance table below
                                illustrate the risks and volatility of an
                                investment in the Fund. Of course, the Fund's
                                past performance does not necessarily indicate
                                how the Fund will perform in the future.
<PAGE>   11

Cash Management Fund (continued)

    PROSPECTUS

                                       8
FUND SUMMARIES

This bar chart shows changes in the Fund's performance from year to year.*
 ANNUAL TOTAL RETURNS (PERIODS ENDED 12/31)

                                  [BAR GRAPH]

<TABLE>
<S>                                                           <C>
                                                                                  %
                                                                                 ----
1991                                                                             6.19
1992                                                                             3.57
1993                                                                             2.78
1994                                                                             3.76
1995                                                                             5.52
1996                                                                             5.02
1997                                                                             5.11
1998                                                                             5.01
1999                                                                             4.72
</TABLE>


* The performance information shown above is based on a calendar year. The
  Fund's total return from 1/1/00 to 9/30/00 was 4.33%.

<TABLE>
                               <S>                       <C>   <C>    <C>
                               Best Quarter:              Q1   1991   1.77%
                               Worst Quarter:             Q4   1993   0.67%
</TABLE>


This table shows the Fund's average annual total returns for periods ending
December 31, 1999.
AVERAGE ANNUAL TOTAL RETURNS (PERIODS ENDED 12/31/99)

<TABLE>
<CAPTION>
                                                                                Since
                                                                              Inception
                                                       1 Year      5 Years    (9/21/90)
                               --------------------------------------------------------
                               <S>                    <C>         <C>         <C>
                               Cash Management
                                 Fund                   4.72%       5.08%       4.72%
                               --------------------------------------------------------
</TABLE>

* The performance information shown above is based on a calendar year. The
  Fund's total return from 1/1/99 to 9/30/99 was 3.41%.
-------------------------------------------------
 YIELD
For the period ended 12/31/99 the 7-day yield was 5.10%.

                                 You may obtain the most current yield
                                 information for the Fund by calling (800)
                                 762-7085.
YIELD:
ALL MUTUAL FUNDS MUST USE THE SAME FORMULAS TO CALCULATE YIELD AND EFFECTIVE
YIELD. THE FUND TYPICALLY ADVERTISES PERFORMANCE IN TERMS OF A 7-DAY YIELD AND
7-DAY EFFECTIVE YIELD AND MAY ADVERTISE TOTAL RETURN. THE 7-DAY YIELD QUOTATION
MORE CLOSELY REFLECTS CURRENT EARNINGS OF THE FUND THAN THE TOTAL RETURN
QUOTATION. THE 7-DAY EFFECTIVE YIELD WILL BE SLIGHTLY HIGHER THAN THE YIELD
BECAUSE OF THE COMPOUNDING EFFECT OF THE ASSUMED REINVESTMENT. CURRENT YIELDS
AND EFFECTIVE YIELDS FLUCTUATE DAILY AND WILL VARY DUE TO FACTORS SUCH AS
INTEREST RATES AND THE QUALITY, LENGTH OF MATURITIES, AND TYPE OF INVESTMENTS IN
THE PORTFOLIO.

(APPLE LOGO)
<PAGE>   12

    PROSPECTUS

                                       9

Cash Management Fund (continued)

FEES AND EXPENSES
------------------------------------------------
Shareholder Fees
This table describes the shareholder fees that
you pay if you purchase or sell Fund shares. You
would pay these fees directly from your
investment in the Fund.
Maximum Sales Charge (Load) Imposed on Purchases
(as a percentage of offering price)           0%
Maximum Deferred Sales Charge (Load)

(as a percentage of net asset value)          0%

------------------------------------------------
Annual Fund Operating Expenses
This table describes the Fund's expenses that
you pay indirectly if you hold Fund shares.

Investment Advisory Fees                  0.40%*
Distribution/Service (12b-1) Fees         0.25%*
Other Expenses                            0.30%*
TOTAL ANNUAL FUND OPERATING EXPENSES      0.95%*
------------------------------------------------

* During the last fiscal year, the Adviser
  waived 0.11% of its Investment Advisory Fees,
  the Distributor waived 0.25% of its
  Distribution/Service (12b-1) Fees, and the
  Administrator waived 0.04% of Other Expenses.
  These fee waivers are expected to continue
  through December 31, 2001. Accordingly, actual
  annual fund operating expenses were as
  follows:

     Investment Advisory Fees              0.29%
     Distribution/Service (12b-1) Fees     0.00%
     Other Expenses                        0.26%
     TOTAL ANNUAL FUND OPERATING EXPENSES  0.55%
---------------------------------------------------
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. The Example also
assumes that each year your investment has a 5%
return and Fund expenses remain the same.
Although your actual costs and returns may be
different, your approximate costs of investing
$10,000 in the Fund would be:

<TABLE>
<CAPTION>
   1 Year        3 Years        5 Years        10 Years
---------------------------------------------------------
<S>            <C>            <C>            <C>
    $97            $303           $525          $1,166
</TABLE>

ADDITIONAL INFORMATION

DIVIDENDS




Dividends are paid monthly.


INVESTMENT ADVISER


Bank of Oklahoma, N.A. Tulsa, OK


INCEPTION DATE

September 21, 1990

NET ASSETS AS OF NOVEMBER 30, 2000


$611 million


SUITABLE FOR IRAS

Yes

MINIMUM INITIAL INVESTMENT

$1,000

AMERICAN PERFORMANCE FUND NUMBER

001

CUSIP NUMBER

028846202

TICKER SYMBOL

APCXX
<PAGE>   13

    PROSPECTUS

                                       10

                                  (FLAG LOGO)

                           AMERICAN PERFORMANCE FUNDS

Your Account

DISTRIBUTION/SERVICE (12B-1) FEES

The Funds (except the American Performance Institutional Money Market Funds)
have adopted a plan under Rule 12b-1 that allows each Fund to pay distribution
and service fees for the sale and distribution of its shares and for services
provided to shareholders. Because these fees are paid out of a Fund's assets
continuously, over time, these fees will increase the cost of your investment
and may cost you more than paying other types of sales charges. The maximum
distribution fee is 0.25% of the average daily net assets of a Fund.

                                OPENING AN ACCOUNT

                                1.Read this prospectus carefully.

                                2.Determine how much you want to invest. The
                                  minimum investment for the American
                                  Performance Funds is as follows:

                                  - INITIAL PURCHASE: $1,000 for each Fund

                                  - ADDITIONAL PURCHASES: $100 for each Fund.

                                  These minimums may be waived if purchases are
                                  made in connection with Individual Retirement
                                  Accounts, Keoghs, qualified pension plans,
                                  similar plans, or other employer plans. For
                                  more information on IRAs, Keoghs, or similar
                                  plans, contact the Funds at (918) 588-6586.
                                  The minimum investment in the Auto Invest Plan
                                  is $100. Please refer to the section titled
                                  "Auto Invest Plan."

                                3.Complete the appropriate parts of the Account
                                  Registration Form, carefully following the
                                  instructions. You must submit additional
                                  documentation when opening trust, corporate or
                                  power of attorney accounts. For more
                                  information, please contact your financial
                                  representative or call the Funds at (800)
                                  762-7085.
<PAGE>   14

    PROSPECTUS

                                       11

BUYING SHARES


<TABLE>
<CAPTION>
        OPENING AN ACCOUNT                 ADDING TO AN ACCOUNT
<S>  <C>                            <C>  <C>
By Mail
-    Make out a check, bank draft,  -    Make out a check, bank draft,
     or money order for the              or money order for the
     investment amount (at least         investment amount payable (at
     $1,000), payable to the             least $100) to the American
     American Performance Funds.         Performance Funds.
-    Deliver the check, bank        -    Deliver the check, bank
     draft, or money order and           draft, or money order and
     your completed Account              investment slip attached to
     Registration Form to the            your account statement (or,
     Funds' Custodian at Bank of         if unavailable, provide the
     Oklahoma, N.A., Attention:          Fund name, amount invested,
     American Performance Funds,         account name, and account
     P.O. Box 182730, Columbus,          number) to the Funds'
     Ohio 43218-2730                     Custodian at Bank of
                                         Oklahoma, N.A., Attention:
                                         American Performance Funds,
                                         P.O. Box 182730, Columbus,
                                         Ohio 43218-2730
----------------------------------------------------------------------
By Overnight Mail
-    Make out a check, bank draft,  -    Make out a check, bank draft,
     or money order for the              or money order for the
     investment amount (at least         investment amount payable (at
     $1,000), payable to the             least $100) to the American
     American Performance Funds.         Performance Funds.
-    Deliver the check, bank        -    Deliver the check, bank
     draft, or money order and           draft, or money order and
     your completed Account              investment slip attached to
     Registration Form to c/o            your account statement (or,
     BISYS Fund Services, Attn:          if unavailable, provide the
     T.A. Operations, American           Fund name, amount invested,
     Performance Funds, 3435             account name, and account
     Stelzer Road, Columbus, Ohio        number) to c/o BISYS Fund
     43219-3035.                         Services, Attn: T.A.
                                         Operations, American
                                         Performance Funds, 3435
                                         Stelzer Road, Columbus, Ohio
                                         43219-3035.
----------------------------------------------------------------------

        All purchases made by check should be in U.S. dollars.
 Third party checks, credit card checks or cash will not be accepted.
</TABLE>

<PAGE>   15

    PROSPECTUS

                                       12
YOUR ACCOUNT

<TABLE>
<CAPTION>
       OPENING AN ACCOUNT               ADDING TO AN ACCOUNT
<S>                               <C>
By Telephone or Wire Transfer
- Call (800) 762-7085 for         - Deliver your completed Account
  instructions on opening an        Registration Form to the Funds
  account by wire transfer.         at: c/o BISYS Fund Services
                                    Attn: T.A. Operations
                                    3435 Stelzer Rd.
                                    Columbus, OH 43219
                                  - To place an order by telephone
                                  call the Funds at (800) 762-7085
                                    for instructions on purchasing
                                    additional shares by wire
                                    transfer.
                                  - Your bank may charge a fee to
                                  wire funds.
------------------------------------------------------------------
By Electronic Funds Transfer
- Your bank must participate in   - Establish the electronic
  the Automated Clearing House    purchase option on your Account
  and must be a U.S. bank.          Registration Form or call
                                    (800) 762-7085.
                                  - Call (800) 762-7085 to arrange
                                  an electronic purchase.
                                  - Your bank may charge a fee to
                                    electronically transfer funds.
------------------------------------------------------------------
</TABLE>
<PAGE>   16

    PROSPECTUS

                                       13

SELLING SHARES


<TABLE>
<CAPTION>
TO SELL SOME OR ALL OF YOUR SHARES
<S>                                         <C>
By Mail
- Accounts of any type.                     - Write a letter of instruction
                                              indicating the fund name, your account
- Sales of any amount.                        number, the name(s) in which the
                                              account is registered and the dollar
                                              value or number of shares you wish to
                                              sell.
                                            - Include the account owner
                                              signature(s).
                                            - Mail the materials to the Funds'
                                              Custodian at Bank of Oklahoma, N.A.,
                                              Attention: American Performance Funds,
                                              P.O. Box 182730, Columbus, Ohio 43218-
                                              2730.
                                            - A check will be mailed to the name(s)
                                              and address in which the account is
                                              registered, or otherwise according to
                                              your letter of instruction.
------------------------------------------------------------------------------------
By Overnight Mail
- Accounts of any type.                     - Write a letter of instruction
                                              indicating the fund name, your account
- Sales of any amount.                        number, the name(s) in which the
                                              account is registered and the dollar
                                              value or number of shares you wish to
                                              sell.
                                            - Include the account owner
                                              signature(s).
                                            - Mail the materials to American
                                              Performance Funds, c/o BISYS Fund
                                              Services, Attn: T.A. Operations, 3435
                                              Stelzer Road, Columbus, Ohio
                                              43219-3035.
                                            - A check will be mailed to the name(s)
                                              and address in which the account is
                                              registered, or otherwise according to
                                              your letter of instruction.
------------------------------------------------------------------------------------
</TABLE>

<PAGE>   17

    PROSPECTUS

                                       14
YOUR ACCOUNT

<TABLE>
<CAPTION>
TO SELL SOME OR ALL OF YOUR SHARES
<S>                                         <C>
------------------------------------------------------------------------------------
By Phone
- Accounts of any type.                     - Call (800) 762-7085 with instructions
                                              as to how you wish to receive your
- Sales of any amount.                        funds (mail, wire, electronic
                                              transfer).
------------------------------------------------------------------------------------
By Wire
- Accounts of any type which have elected   - Call (800) 762-7085 to request a wire
  the wire option on the Account              transfer.
  Registration Form.
                                            - If you call by 4 p.m. Eastern time,
- Sales of any amount.                        your payment will normally be wired to
                                              your bank on the next business day.
                                            - The Fund may charge a wire fee.
                                            - Your bank may charge a fee to wire
                                              funds.
------------------------------------------------------------------------------------
By Electronic Funds Transfer
- Accounts of any type.                     - Call (800) 762-7085 to request an
                                              electronic funds transfer.
- Sales of any amount.
                                            - If you call by 4 p.m. Eastern time,
- Shareholders with accounts at a U.S.        the NAV of your shares will normally
  bank which participates in the Automated    be determined on the same day and the
  Clearing House.                             proceeds will be created within 8
                                              days.
                                            - Your bank may charge a fee to
                                              electronically transfer funds.
------------------------------------------------------------------------------------
</TABLE>

Selling Shares in Writing. In certain circumstances, you may need to include a
signature guarantee, which protects you against fraudulent orders. You will need
a signature guarantee unless:

- the redemption check is payable to the shareholder(s) of record, and the check
  is mailed to the shareholder(s) of record and mailed to the address of record,
  or

- the redemption proceeds are being wired according to bank instructions
  currently on your account.

You should be able to obtain your signature guarantee from a bank, broker,
dealer, credit union, securities exchange or association, clearing agency, or
savings association. A notary public CANNOT provide a signature guarantee.
<PAGE>   18

    PROSPECTUS

                                       15

Receiving Your Money. Normally, payment of your redemption proceeds will be made
as promptly as possible and, in any event, within seven calendar days after the
redemption order is received. At various times, however, a Fund may be requested
to redeem shares for which it has not yet received good payment; collection of
payment may take ten or more days. In these circumstances, the redemption
request will be rejected by the Fund. Once a Fund has received good payment for
the shares a shareholder may submit another request for redemption. If you have
made your initial investment by check, you cannot receive the proceeds of that
check until it has cleared (which may require up to 10 business days). You can
avoid this delay by purchasing shares with a certified check.

Involuntary Sales of Your Shares. Due to the relatively high costs of handling
small investments, each Fund reserves the right to redeem your shares at net
asset value if your account balance in any Fund drops below $500. Before any
Fund exercises its right to redeem your shares you will be given at least 60
days written notice to give you time to add to your account and avoid selling
your shares.

Refusal of Redemption Request. The Funds may postpone payment for shares at
times when the New York Stock Exchange is closed or under any emergency
circumstances as determined by the Securities and Exchange Commission. If you
experience difficulty making a telephone redemption during periods of drastic
economic or market change, you can send the Funds your request by regular or
overnight mail. Follow the instructions above under "Selling Your Shares" in
this section.

Redemption In Kind. The Funds reserve the right to make payment in securities
rather than cash, known as "redemption in kind." This could occur under
extraordinary circumstances, such as a very large redemption that could affect
Fund operations (for example, more than 1% of a Fund's net assets). If a Fund
deems it advisable for the benefit of all shareholders, redemption in kind will
consist of securities equal in market value to your shares. When you convert
these securities to cash, you will pay brokerage charges.

Undeliverable Redemption Checks. For any shareholder who chooses to receive
distributions in cash: If distribution checks (1) are returned and marked as
"undeliverable" or (2) remain uncashed for six months, your account will be
changed automatically so that all future distributions are reinvested in your
account. Checks that remain uncashed for six months will be canceled and the
money reinvested in the appropriate Fund as of the cancellation date. No
interest is paid during the time the check is outstanding.
<PAGE>   19

    PROSPECTUS

                                       16
YOUR ACCOUNT

EXCHANGING SHARES

How to Exchange Your Shares. Shares of any Fund (except the American Performance
Institutional Money Market Funds) may be exchanged without payment of a sales
charge for shares of any American Performance Fund having a sales charge equal
to or less than that of the Fund shares sought to be exchanged. If the
shareholder exercising the exchange privilege paid a sales charge on the
exchanged shares that is less than the sales charge applicable to the shares
sought to be acquired through the exchange, such shareholder must pay a sales
charge on the exchange equal to the difference between the sales charge paid for
the exchanged shares and the sales charge applicable to the shares sought to be
acquired through the exchange. The exchange will be made on the basis of the
relative net asset values of the shares exchanged. The Funds reserve the right
to eliminate or to alter the terms of this exchange offer upon sixty days'
notice to shareholders.

A shareholder wishing to exchange his or her shares may do so by contacting the
Funds at (800) 762-7085 or by providing written instructions to the Funds at
BISYS Fund Services, 3435 Stelzer Road, Columbus, OH 43219. Any shareholder who
wishes to make an exchange must have received a current Prospectus of the Fund
in which he or she wishes to invest before the exchange will be effected.

TRANSACTION POLICIES

Valuation of Shares. The net asset value per share of a Fund is determined by
dividing the total market value of the Fund's investments and other assets, less
any liabilities, by the total number of outstanding shares of the Fund.


- The net asset value of each of the Money Market Funds is determined at 4:00
  p.m. on each business day in which the New York Stock Exchange is open for
  trading and the Federal Reserve Bank of Kansas City is open.


- The assets in each Money Market Fund are valued based upon the amortized cost
  method. For further information about valuation of investments, see the
  Statement of Additional Information.

- The net asset value of each of the Money Market Funds is expected to remain at
  a constant $1.00 per share, although there is no assurance that this will be
  maintained.

Buy and Sell Prices. When you buy shares, you pay the net asset value next
determined after your order is received. When you sell shares, you receive the
net asset value next determined after your order is received.
<PAGE>   20

    PROSPECTUS

                                       17

ADDITIONAL INVESTOR SERVICES

Auto Invest Plan (AIP). AIP lets you set up periodic additional investments in
the Funds of your choice through automatic deductions from your bank account.
The minimum investment amount is $50 per month or quarter per Fund. To
establish, complete the appropriate section in the Account Registration Form.
The minimum initial investment in the AIP is $100 and the minimum for subsequent
investments is $50. To participate in AIP from your bank account, please attach
a voided check to your Account Registration Form.

Directed Dividend Option. By selecting the appropriate box in the Account
Registration Form, you can elect to receive your distributions in cash (check)
or have distributions (capital gains and dividends) reinvested in another
American Performance Fund without a sales charge. You must maintain the minimum
balance in each Fund into which you plan to reinvest distributions or the
reinvestment will be suspended and your distributions paid to you. The Fund may
modify or terminate this directed dividend option without notice. You can change
or terminate your participation in the directed dividend option at any time.

Systematic Withdrawal Plan (SWP). If you have at least $10,000 in your account,
you may use SWP, which allows you to receive regular distributions from your
account. Under the plan you may elect to receive automatic payments via check of
at least $100 per Fund or more on a monthly or quarterly basis. You may arrange
to receive regular distributions from your account via check by completing the
appropriate section in the Account Registration Form and attaching a voided
check or by calling (800) 762-7085. The maximum withdrawal per year is 12% of
the account value at the time of election.

DIVIDENDS AND CAPITAL GAINS


As a mutual fund shareholder, you may receive capital gains and/or income from
your investment. The Money Market Funds declare dividends daily and pay income
dividends monthly. The Funds distribute capital gains they have realized, if
any, at least once a year. It is unlikely that the Money Market Funds will
realize any capital gains.


We will automatically reinvest any income and capital gains distributions you
are entitled to in additional shares of your Fund(s) unless you notify our
Distributor that you want to receive your distributions in cash. To do so, send
a letter with your request, including your name and account number to:

                           American Performance Funds
                            c/o BISYS Fund Services
                               3435 Stelzer Road
                              Columbus, Ohio 43219

Your request will become effective for distributions having record dates after
our Distributor receives your request. Note that the Internal Revenue Service
treats
<PAGE>   21

    PROSPECTUS

                                       18
YOUR ACCOUNT

dividends paid in additional Fund shares the same as it treats dividends paid in
cash.

TAXES

Your mutual fund investments may have a considerable impact on your tax
situation. We've summarized some of the main points you should know below. Note,
however, that the following is general information and will not apply to you if
you are investing through a tax-deferred account such as an IRA or a qualified
employee benefit plan. In addition, if you are not a resident of the United
States, you may have to pay taxes besides those described here, such as U.S.
withholding and estate taxes.

- Important Note. If you have not done so already, be sure to provide us with
  your correct taxpayer identification number OR certify that it is correct.
  Unless we have that information, the Funds may be required by law to withhold
  31% of the taxable distributions you would otherwise be entitled to receive
  from your Fund investments as well as any proceeds you would normally receive
  from selling Fund shares.

We will send you a statement each year showing the tax status of all your
distributions. The laws governing taxes change frequently, however, so please
consult your tax adviser for the most up-to-date information and specific
guidance regarding your particular tax situation. You can find more information
about the potential tax consequences of mutual fund investing in our Statement
of Additional Information.

- Taxes on Fund Distributions. You may owe taxes on Fund distributions even if
  they represent income or capital gains the Fund earned before you invested in
  it (for example, if such income or capital gains were included in the price
  you initially paid for your shares). Note that you will generally have to pay
  taxes on Fund distributions whether you received them in the form of cash or
  additional Fund shares. The Internal Revenue Service treats most mutual fund
  distributions as ordinary income. One exception is gains from the sale of
  assets held by a Fund for more than one year, which, for an individual
  shareholder are typically taxed at a lower rate than ordinary income
  regardless of how long such shareholder has held Fund shares.

- State and Local Taxes. In addition to federal taxes, you may have to pay state
  and local taxes on the dividends or capital gains, if any, you receive from a
  Fund, as well as on capital gains, if any, you realized from selling or
  exchanging Fund shares.

- Dividends and Short-Term Capital Gains. The IRS treats any dividends and
  short-term capital gains you receive from the Funds as ordinary income.


The portfolio managers of the Funds do not actively consider tax consequences
when making investment decisions. From time to time, the Funds may realize

<PAGE>   22

    PROSPECTUS

                                       19

capital gains as by-products of ordinary investment activities. As a result, the
amount and timing of Fund distributions may vary considerably from year to year.

THESE TAX CONSIDERATIONS MAY OR MAY NOT APPLY TO YOU. PLEASE CONSULT YOUR TAX
ADVISER TO DETERMINE WHETHER THESE CONSIDERATIONS ARE RELEVANT TO YOUR
PARTICULAR INVESTMENTS AND TAX SITUATION. MORE INFORMATION ABOUT TAXES IS IN OUR
STATEMENT OF ADDITIONAL INFORMATION.
<PAGE>   23

    PROSPECTUS

                                       20

                                  (FLAG LOGO)

                           AMERICAN PERFORMANCE FUNDS

Investment Management

                                INVESTMENT ADVISER

                                Bank of Oklahoma, N.A. serves as the investment
                                adviser to each of the Funds and, subject to the
                                supervision of Board of Trustees of the American
                                Performance Funds, is responsible for the
                                day-to-day management of their investment
                                portfolios.


                                As of September 30, 2000 Bank of Oklahoma, N.A.
                                and its affiliates had $9.2 billion in assets
                                under management. Bank of Oklahoma, N.A. is a
                                subsidiary of BOK Financial Corporation ("BOK
                                Financial"). BOK Financial is controlled by its
                                principal shareholder, George B. Kaiser. Through
                                Bank of Oklahoma, N.A. and its other
                                subsidiaries, BOK Financial provides a full
                                array of trust, commercial banking and retail
                                banking. Its non-bank subsidiaries engage in
                                various bank-related services, including
                                mortgage banking and providing credit life,
                                accident, and health insurance on certain loans
                                originated by its subsidiaries.


                                The investment advisory fees paid to Bank of
                                Oklahoma, N.A., after voluntary fee reductions,
                                by the Funds for the fiscal year ended August
                                31, 2000, were as follows:

<TABLE>
<CAPTION>
                                       FUND                  % OF AVERAGE NET ASSETS
                               <S>                      <C>
                                - U.S. Treasury Fund           0.40%
                                - Cash Management Fund      0.29%
</TABLE>
<PAGE>   24

    PROSPECTUS

                                       21

                                  (FLAG LOGO)

                           AMERICAN PERFORMANCE FUNDS

Financial Highlights

The financial highlights table is intended to help you understand the Funds'
financial performance for the past 5 years. Certain information reflects
financial results for a single Fund share. 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). This
information has been audited by KPMG LLP, whose report, along with the Funds'
financial statements, are included in the annual report, which is available upon
request.


          HOW TO READ THE           FINANCIAL HIGHLIGHTS TABLE:           THIS
EXPLANATION USES THE U.S. TREASURY FUND AS AN EXAMPLE. THE FUND BEGAN FISCAL
2000 WITH A NET ASSET VALUE (PRICE) OF $1 PER SHARE. DURING THE YEAR, THE FUND
EARNED $0.051 PER SHARE FROM INVESTMENTS INCOME (INTEREST AND DIVIDENDS).



SHAREHOLDERS RECEIVED $0.051 PER SHARE IN THE FORM OF DIVIDEND DISTRIBUTIONS. A
PORTION OF EACH YEAR'S DISTRIBUTIONS MAY COME FROM THE PRIOR YEAR'S INCOME.



THE EARNINGS ($0.051 PER SHARE) MINUS THE DISTRIBUTIONS ($0.051 PER SHARE)
RESULTED IN A SHARE PRICE OF $1 AT THE END OF THE YEAR. FOR A SHAREHOLDER WHO
REINVESTED THE DISTRIBUTIONS IN THE PURCHASE OF MORE SHARES, THE TOTAL RETURN
FROM THE FUND WAS 5.20% FOR THE YEAR.



AS OF AUGUST 31, 2000, THE FUND HAD $608 MILLION IN NET ASSETS. FOR THE YEAR,
ITS EXPENSE RATIO AFTER FEE WAIVERS WAS 0.71% ($7.10 PER $1,000 OF NET ASSETS);
AND ITS NET INVESTMENT INCOME AMOUNTED TO 5.11% OF ITS AVERAGE NET ASSETS.

(APPLE LOGO)
<PAGE>   25

    PROSPECTUS

                                       22
FINANCIAL HIGHLIGHTS

 U.S. TREASURY FUND


<TABLE>
<CAPTION>
                                                         YEAR ENDED AUGUST 31,
                                         ------------------------------------------------------
                                           2000       1999       1998       1997        1996
-----------------------------------------------------------------------------------------------
<S>                                      <C>        <C>        <C>        <C>        <C>
Net Asset Value, Beginning of Period     $  1.000   $  1.000   $  1.000   $  1.000    $  1.000
-----------------------------------------------------------------------------------------------

Investment Activities
 Net investment income                      0.051      0.042      0.048      0.046       0.047
                                         ----------------------------------------------
     Total from Investment Activities       0.051      0.042      0.048      0.046       0.047
                                         ----------------------------------------------

Distributions
 Net investment income                     (0.051)    (0.042)    (0.048)    (0.046)     (0.047)
                                         ----------------------------------------------
     Total Distributions                   (0.051)    (0.042)    (0.048)    (0.046)     (0.047)
-----------------------------------------------------------------------------------------------

Net Asset Value, End of Period           $  1.000   $  1.000   $  1.000   $  1.000    $  1.000

-----------------------------------------------------------------------------------------------

Total Return                                 5.20%      4.26%      4.94%      4.74%       4.85%

-----------------------------------------------------------------------------------------------

Ratios/Supplementary Data:
 Net Assets at end of period (000)       $608,410   $394,415   $388,319   $298,424    $217,406

 Ratio of expenses to average net
   assets                                    0.71%      0.71%      0.72%      0.72%       0.74%

 Ratio of net investment income to
   average net assets                        5.11%      4.17%      4.83%      4.65%       4.74%

 Ratio of expenses to average net
   assets*                                   0.96%      0.96%      0.97%      0.97%       0.99%

-----------------------------------------------------------------------------------------------
</TABLE>



* During the period, certain fees were voluntarily reduced. If such voluntary
  fee reductions had not occurred, the ratios would have been as indicated.

<PAGE>   26

    PROSPECTUS

                                       23

 CASH MANAGEMENT FUND


<TABLE>
<CAPTION>
                                                         YEAR ENDED AUGUST 31,
                                         ------------------------------------------------------
                                           2000       1999       1998       1997        1996
-----------------------------------------------------------------------------------------------
<S>                                      <C>        <C>        <C>        <C>        <C>
Net Asset Value, Beginning of Period     $  1.000   $  1.000   $  1.000   $  1.000    $  1.000
-----------------------------------------------------------------------------------------------

Investment Activities
 Net investment income                      0.054      0.045      0.050      0.049       0.050
 Net realized and unrealized losses on
   investments                                 --         --         --     (0.010)         --
                                         ----------------------------------------------
     Total from Investment Activities       0.054      0.045      0.050      0.039       0.050
                                         ----------------------------------------------

Distributions
 Net investment income                     (0.054)    (0.045)    (0.050)    (0.049)     (0.050)
                                         ----------------------------------------------
     Total Distributions                   (0.054)    (0.045)    (0.050)    (0.049)     (0.050)
                                         ----------------------------------------------
 Capital contribution                                     --         --      0.010          --
-----------------------------------------------------------------------------------------------

Net Asset Value, End of Period           $  1.000   $  1.000   $  1.000   $  1.000    $  1.000

-----------------------------------------------------------------------------------------------

Total Return                                 5.55%      4.63%      5.14%      5.05%(a)      5.14%
-----------------------------------------------------------------------------------------------

Ratios/Supplementary Data:
 Net Assets at end of period (000)       $647,086   $551,880   $466,571   $331,095    $375,797

 Ratio of expenses to average net
   assets                                    0.55%      0.65%      0.71%      0.72%       0.71%

 Ratio of net investment income to
   average net assets                        5.42%      4.53%      5.02%      4.93%       5.01%

 Ratio of expenses to average net
   assets*                                   0.95%      0.95%      0.96%      0.97%       0.96%

-----------------------------------------------------------------------------------------------
</TABLE>


*  During the period, certain fees were voluntarily reduced. If such voluntary
   fee reductions had not occurred, the ratios would have been as indicated.

(a) The total return includes the effect of a capital contribution of $0.010 per
    share. The return without the capital contribution would have been 4.05%.
<PAGE>   27

    PROSPECTUS

                                       24

                                  (FLAG LOGO)

                           AMERICAN PERFORMANCE FUNDS

Investment
Practices and Risks

INVESTMENT PRACTICES

The Funds invest in a variety of securities and employ a number of investment
techniques. Each security and technique involves certain risks. What follows is
a more comprehensive list of the securities and techniques used by the Funds, as
well as the risks inherent in their use. For a more complete discussion, see the
Statement of Additional Information. Following the table is a more complete
discussion of risk. Refer to the "Fund Summaries" section for a description of
each Fund's principal investment strategy and risks.

<TABLE>
<CAPTION>

FUND NAME                                              FUND CODE
<S>                                                <C>
 - U.S. Treasury Fund                                      1
 - Cash Management Fund                                    2
</TABLE>

<TABLE>
<CAPTION>

INSTRUMENT                               FUND CODE          RISK TYPE
<S>                                  <C>                <C>
AMERICAN DEPOSITORY RECEIPTS                 2          - Market
(ADRS):                                                 - Political
ADRs are foreign shares of a                            - Foreign
company held by a U.S. bank that                          Investment
issues a receipt evidencing
ownership. Dividends are paid in
U.S. dollars.
-------------------------------------------------------------------------
ASSET-BACKED SECURITIES:                     2          - Pre-payment
Securities secured by company                           - Credit
receivables, home equity loans,                         - Interest Rate
truck and auto loans, leases,                           - Regulatory
credit card receivables and other
securities backed by other types of
receivables or other assets.
-------------------------------------------------------------------------
BANKERS' ACCEPTANCES:                        2          - Credit
Bills of exchange or time drafts                        - Liquidity
drawn on and accepted by a                              - Interest Rate
commercial bank. Maturities are
generally six months or less.
</TABLE>
<PAGE>   28

    PROSPECTUS

                                       25

<TABLE>
<CAPTION>

INSTRUMENT                               FUND CODE          RISK TYPE
<S>                                  <C>                <C>
CALL AND PUT OPTIONS:                        2          - Credit
A call option gives the buyer the                       - Market
right to buy, and obligates the                         - Leverage
seller of the option to sell, a
security at a specified price. A
put option gives the buyer the
right to sell, and obligates the
seller of the option to buy a
security at a specified price. The
Funds will sell only covered call
and secured put options.
-------------------------------------------------------------------------
CERTIFICATES OF DEPOSIT:                     2          - Credit
Negotiable instruments with a                           - Liquidity
stated maturity.                                        - Interest Rate
-------------------------------------------------------------------------
COMMERCIAL PAPER:                            2          - Credit
Secured and unsecured short-term                        - Liquidity
promissory notes issued by                              - Interest Rate
corporations and other entities                         - Foreign
including foreign entities.                               Investment
Maturities generally vary from a
few days to nine months.
-------------------------------------------------------------------------
ILLIQUID SECURITIES:                       1, 2         - Liquidity
Each Fund may invest up to 10% of                       - Market
its net assets in securities that
are illiquid. Illiquid securities
are those securities which cannot
be disposed of in the ordinary
course of business, seven days or
less, at approximately the value at
which the Fund has valued the
securities.
-------------------------------------------------------------------------
LOAN PARTICIPATION INTERESTS:                2          - Interest Rate
Loan participation interests are                        - Liquidity
interests in bank loans made to                         - Credit
corporations. In these arrangements
the bank transfers the cash stream
of the underlying bank loan to the
participating investor.
</TABLE>
<PAGE>   29

    PROSPECTUS

                                       26
INVESTMENT PRACTICES AND RISKS

<TABLE>
<CAPTION>

INSTRUMENT                               FUND CODE          RISK TYPE
<S>                                  <C>                <C>
MONEY MARKET INSTRUMENTS:                    2          - Interest Rate
Investment-grade, U.S.                                  - Credit
dollar-denominated debt securities
that have remaining maturities of
one year or less. These securities
may include U.S. government
obligations, commercial paper and
other short-term corporate
obligations, repurchase agreements
collateralized with U.S. government
securities, certificates of
deposit, bankers' acceptances, and
other financial institution
obligations. These securities may
carry fixed or variable interest
rates.
-------------------------------------------------------------------------
MORTGAGE-BACKED SECURITIES:                1, 2         - Pre-payment
Debt obligations secured by real                        - Credit
estate loans and pools of loans.                        - Interest Rate
These include collateralized                            - Regulatory
mortgage obligations and real
estate mortgage investment
conduits.
-------------------------------------------------------------------------
MUNICIPAL SECURITIES:                        2          - Credit
Securities issued by a state or                         - Political
political subdivision to obtain                         - Interest Rate
funds for various public purposes.                      - Regulatory
-------------------------------------------------------------------------
REPURCHASE AGREEMENTS:                     1, 2         - Credit
The purchase of a security and the
simultaneous commitment to return
the security to the seller at an
agreed upon price on an agreed upon
date. This is treated as a loan by
a Fund.
-------------------------------------------------------------------------
REVERSE REPURCHASE AGREEMENTS:             1, 2         - Credit
The sale of a security and the                          - Leverage
simultaneous commitment to buy the
security back at an agreed upon
price on an agreed upon date. This
is treated as a borrowing by a
Fund.
-------------------------------------------------------------------------
RESTRICTED SECURITIES:                       2          - Liquidity
Securities not registered under the                     - Market
Securities Act of 1933, such as
privately placed commercial paper
and Rule 144A securities.
</TABLE>
<PAGE>   30

    PROSPECTUS

                                       27

<TABLE>
<CAPTION>

INSTRUMENT                               FUND CODE          RISK TYPE
<S>                                  <C>                <C>
SECURITIES LENDING:                        1, 2         - Leverage
The lending of up to 33 1/3% of a                       - Liquidity
Fund's total assets. In return the                      - Credit
Fund will receive cash, other
securities, and/or letters of
credit.
-------------------------------------------------------------------------
TIME DEPOSITS:                               2          - Liquidity
Non-negotiable receipts issued by a                     - Credit
bank in exchange for the deposit of                     - Interest Rate
funds.
-------------------------------------------------------------------------
TREASURY RECEIPTS:                         1, 2         - Interest Rate
Treasury receipts, Treasury
investment growth receipts, and
certificates of accrual of Treasury
securities.
-------------------------------------------------------------------------
U.S. GOVERNMENT AGENCY SECURITIES:         1, 2         - Interest Rate
Securities issued by agencies and                       - Credit
instrumentalities of the U.S.
government. These include Ginnie
Mae, Fannie Mae, and Freddie Mac.
-------------------------------------------------------------------------
U.S. TREASURY OBLIGATIONS:                 1, 2         - Interest Rate
Bills, notes, bonds, separately
traded registered interest and
principal securities, and coupons
under bank entry safekeeping.
-------------------------------------------------------------------------
VARIABLE AND FLOATING RATE                   2          - Credit
INSTRUMENTS:                                            - Liquidity
Obligations with interest rates                         - Interest Rate
which are reset daily, weekly,
quarterly or some other period and
which may be payable to the Fund on
demand.
-------------------------------------------------------------------------
WHEN-ISSUED SECURITIES:                    1, 2         - Interest Rate
Contract to purchase securities at                      - Leverage
a fixed price for delivery at a                         - Liquidity
future date.                                            - Credit
</TABLE>
<PAGE>   31

    PROSPECTUS

                                       28
INVESTMENT PRACTICES AND RISKS
INVESTMENT RISKS

Below is a more complete discussion of the types of risks inherent in the
securities and investment techniques listed above as well as those risks
discussed in "What are the main risks of investing in this Fund?" Because of
these risks, the value of the securities held by each Fund may fluctuate, as
will the value of your investment in the Fund. Certain investments and Funds are
more susceptible to these risks than others.

- Credit Risk
  The risk that the issuer of a security, or the counterparty to a contract,
  will default or otherwise become unable to honor a financial obligation.
  Credit risk is generally higher for non-investment grade securities. The price
  of a security can be adversely affected prior to actual default as its credit
  status deteriorates and the probability of default rises.

- Foreign Investment Risk
  The risk associated with higher transaction costs, delayed settlements,
  currency controls and adverse economic developments. This also includes the
  risk that fluctuations in the exchange rates between the U.S. dollar and
  foreign currencies may negatively affect an investment. Adverse changes in
  exchange rates may erode or reverse any gains produced by foreign currency
  denominated investments and may widen any losses. Exchange rate volatility
  also may affect the ability of an issuer to repay U.S. dollar denominated
  debt, thereby increasing credit risk. Foreign securities may also be affected
  by incomplete or inaccurate financial information on companies, social
  upheavals or political actions ranging from tax code changes to governmental
  collapse. These risks are more significant in emerging markets.

- Interest Rate Risk
  The risk that debt prices overall will decline over short or even long periods
  due to rising interest rates. A rise in rates typically causes a fall in
  values while a fall in rates typically causes a rise in values. Interest rate
  risk should be modest for shorter-term securities, moderate for
  intermediate-term securities, and high for longer-term securities.
<PAGE>   32

    PROSPECTUS

                                       29

- Leverage Risk
  The risk associated with securities or practices that multiply small index or
  market movements into large changes in value. Leverage is often associated
  with investments in derivatives, but also may be embedded directly in the
  characteristics of other securities. Leverage risk is hedged when a derivative
  (a security whose value is based on another security or index) is used as a
  hedge against an opposite position that a Fund also holds, any loss generated
  by the derivative should be substantially offset by gains on the hedged
  investment, and vice versa. Hedges are sometimes subject to imperfect matching
  between the derivative and underlying security, and there can be no assurance
  that a Fund's hedging transactions will be effective.

- Liquidity Risk
  The risk that certain securities may be difficult or impossible to sell at the
  time and the price that would normally prevail in the market. The seller may
  have to lower the price, sell other securities instead or forego an investment
  opportunity, any of which could have a negative effect on Fund management or
  performance. This includes the risk of missing out on an investment
  opportunity because the assets necessary to take advantage of it are tied up
  in less advantageous investments.

- Management Risk
  The risk that a strategy used by a Fund's portfolio manager may fail to
  produce the intended result. This includes the risk that changes in the value
  of a hedging instrument will not match those of the asset being hedged.
  Incomplete matching can result in unanticipated risks.

- Market Risk
  The risk that the market value of a security may move up and down, sometimes
  rapidly and unpredictably. These fluctuations may cause a security to be worth
  less than the price originally paid for it, or less than it was worth at an
  earlier time. Market risk may affect a single issuer,
<PAGE>   33

    PROSPECTUS

                                       30
INVESTMENT PRACTICES AND RISKS

  industrial sector of the economy or the market as a whole. Finally, key
  information about a security or market may be inaccurate or unavailable. This
  is particularly relevant to investments in foreign securities.

- Political Risk
  The risk of losses attributable to unfavorable governmental or political
  actions, seizure of foreign deposits, changes in tax or trade statutes, and
  governmental collapse and war.

- Pre-Payment/Call Risk
  The risk that the principal repayment of a security will occur at an
  unexpected time. Prepayment risk is the chance that the repayment of a
  mortgage will occur sooner than expected. Call risk is the possibility that
  during periods of falling interest rates, a bond issuer will "call" -- or
  repay -- its high-yielding bond before the bond's maturity date. Changes in
  pre-payment/call rates can result in greater price and yield volatility.

  Pre-payments/calls generally accelerate when interest rates decline. When
  mortgage and other obligations are pre-paid, a Fund may have to reinvest in
  securities with a lower yield. In this event, the Fund would experience a
  decline in income -- and the potential for taxable capital gains. Further,
  with early prepayment, a Fund may fail to recover any premium paid, resulting
  in an unexpected capital loss. Prepayment/call risk is generally low for
  securities with a short-term maturity, moderate for securities with an
  intermediate-term maturity, and high for securities with a long-term maturity.

- Regulatory Risk
  The risk associated with Federal and state laws which may restrict the
  remedies that a lender has when a borrower defaults on loans. These laws
  include restrictions on foreclosures, redemption rights after foreclosure,
  Federal and state bankruptcy and debtor relief laws, restrictions on "due on
  sale" clauses, and state usury laws.
<PAGE>   34

    PROSPECTUS

                                       31

                                  (FLAG LOGO)

                           AMERICAN PERFORMANCE FUNDS

Glossary of Investment Terms

DIVIDENDS
Payment to shareholders of income from interest or dividends generated by a
fund's investments.

INVESTMENT ADVISER
An organization that makes the day-to-day decisions regarding a fund's
investments.

LIQUIDITY
The degree of a security's marketability (that is, how quickly the security can
be sold at a fair price and converted to cash).

MONEY MARKET FUND
A mutual fund that seeks to provide income, liquidity, and a stable share price
by investing in very short-term, liquid investments.

MONEY MARKET INSTRUMENTS
Short-term, liquid investments (usually with a maturity of 13 months or less)
which include U.S. Treasury bills, bank certificates of deposit (CDs),
repurchase agreements, commercial paper, and bankers' acceptances.

MUTUAL FUND
An investment company that pools the money of many people and invests it in a
variety of securities in an effort to achieve a specific objective over time.

NET ASSET VALUE (NAV)
The market value of a mutual fund's total assets, minus liabilities, divided by
the number of shares outstanding. The value of a single share is called its
share value or share price.

OPERATING EXPENSES

The percentage of a fund's average net assets used to pay its expenses.
Operating expenses include investment advisory fees and administration fees.


SECURITIES
Stocks, bonds, money market instruments, and other investment vehicles.

TOTAL RETURN
A percentage change, over a specified time period, in a mutual fund's net asset
value, with the ending net asset value adjusted to account for the reinvestment
of all distributions of dividends and capital gains.

VOLATILITY
The fluctuations in value of a mutual fund or other security. The greater fund's
volatility, the wider the fluctuations between its high and low prices.

YIELD
Income (interest or dividends) earned by an investment, expressed as a
percentage of the investment's price.
<PAGE>   35

                                  (FLAG LOGO)

                           AMERICAN PERFORMANCE FUNDS

More Information
                                More information about the Funds is available
                                without charge through the following:

                                STATEMENT OF ADDITIONAL INFORMATION (SAI)
                                More detailed information about the American
                                Performance Funds is included in our SAI. The
                                SAI has been filed with the SEC and is
                                incorporated by reference into this prospectus.
                                This means that the SAI, for legal purposes, is
                                a part of this prospectus.
                                ANNUAL AND SEMI-ANNUAL REPORTS
                                These reports list the Funds' holdings and
                                contain information on the market conditions and
                                investment strategies that significantly
                                affected the American Performance Funds'
                                performance during the last year.
                                TO OBTAIN THE SAI, ANNUAL OR SEMI-ANNUAL
                                REPORTS, OR MORE INFORMATION:
                                BY TELEPHONE:
                                Call 1-800-762-7085

                                BY MAIL:
                                American Performance Funds
                                3435 Stelzer Road
                                Columbus, Ohio 43219-3035

                                BY INTERNET:
                                http://www.apfunds.com

                                FROM THE SEC:
                                You can also obtain the SAI, the Annual and
                                Semi-Annual Reports, and other information about
                                the American Performance Funds, from the SEC's
                                web site (http://www.sec.gov). You may review
                                and copy documents at the SEC Public Reference
                                Room in Washington, DC (for information call
                                1-202-942-8090). You may request documents by
                                mail from the SEC, upon payment of a duplicating
                                fee, by writing to: Securities and Exchange
                                Commission, Public Reference Section, 450 5th
                                Street, N.W., Washington, DC 20549-0102 or by
                                sending an e-mail to: [email protected].

                                American Performance Funds' Investment Company

                                Act registration number is 811-6114.

INVESTMENT ADVISER

Bank of Oklahoma, N.A.
Bank Oklahoma Tower
Tulsa, Oklahoma 74103

DISTRIBUTOR &
ADMINISTRATOR

BISYS Fund Services
3435 Stelzer Road
Columbus, Ohio
43219-3035

LEGAL COUNSEL

Ropes & Gray
1301 K Street, N.W.
Suite 800 East
Washington, DC 20005



<PAGE>   36

                                  (FLAG LOGO)

                           AMERICAN PERFORMANCE FUNDS

                                          Prospectus
                                          January 1, 2001

                                          MONEY MARKET FUNDS

                                          U.S. Treasury Fund
                                          Cash Management Fund
                                          BOND FUNDS

                                          Bond Fund
                                          Intermediate Bond Fund
                                          Intermediate Tax-Free Bond Fund
                                          Short-Term Income Fund
                                          EQUITY FUNDS

                                          Equity Fund
                                          Balanced Fund
                                          Growth Equity Fund
                                          Small Cap Equity Fund

                (APPLE BUSHEL ARTWORK)
                                          THE SECURITIES AND EXCHANGE COMMISSION
                                          HAS NOT APPROVED OR DISAPPROVED OF
                                          THESE SECURITIES OR DETERMINED WHETHER
                                          THIS PROSPECTUS IS ACCURATE OR
                                          COMPLETE. ANY REPRESENTATION TO THE

                                          CONTRARY IS UNLAWFUL.

(APPLE LOGO)
<PAGE>   37

HOW TO READ THIS PROSPECTUS

This prospectus is arranged into different sections so that you can easily
review this important information. The next page contains general information
you should know about investing in the Funds.

If you would like more detailed
information about each Fund, please see:
Fund Summaries.

<TABLE>
<S>                                  <C>
TABLE OF CONTENTS
INTRODUCTION                           1
FUND SUMMARIES                         2
  Money Market Funds                   2
    U.S. Treasury Fund                 2
    Cash Management Fund               6
  Bond Funds
    Bond Fund                         10
    Intermediate Bond Fund            15
    Intermediate Tax-Free Bond
      Fund                            20
    Short-Term Income Fund            26
  Equity Funds
    Equity Fund                       31
    Balanced Fund                     36
    Growth Equity Fund                41
    Small Cap Equity Fund             46
</TABLE>

If you would like more information about
the following topics, please see:


<TABLE>
<S>                                  <C>
YOUR ACCOUNT                          50
    How Sales Charges are
      Calculated                      50
    Sales Charge Waivers              51
    Sales Charge Reductions           52
    Distribution/Service (12b-1)
      Fees                            54
    Opening An Account                54
    Buying Shares                     55
    Selling Shares                    57
    Exchanging Shares                 60
    Transaction Policies              60
    Additional Investor Services      61
    Dividends and Capital Gains       61
    Taxes                             62
INVESTMENT MANAGEMENT                 65
FINANCIAL HIGHLIGHTS                  67
INVESTMENT PRACTICES AND RISKS        78
GLOSSARY OF INVESTMENT TERMS          89
</TABLE>


To obtain more information about the
American Performance Funds please refer
to the back cover of the prospectus.

January 1, 2001

(APPLE LOGO)
<PAGE>   38

    PROSPECTUS

                                       1

                                  (FLAG LOGO)

                           AMERICAN PERFORMANCE FUNDS

Introduction

                                Each Fund is a mutual fund. A mutual fund pools
                                shareholders' money and, using professional
                                investment managers, invests it in securities
                                like stocks and bonds. Before you invest, you
                                should know a few things about investing in
                                mutual funds.

                                The value of your investment in a Fund is based
                                on the market prices of the securities the Fund
                                holds. These prices change daily due to economic
                                and other events that affect securities markets
                                generally, as well as those that affect
                                particular companies or governments. These price
                                movements, sometimes called volatility, will
                                vary depending on the types of securities a Fund
                                owns and the markets where these securities
                                trade.

                                LIKE OTHER INVESTMENTS, YOU COULD LOSE MONEY ON
                                YOUR INVESTMENT IN A FUND. YOUR INVESTMENT IN A
                                FUND IS NOT A DEPOSIT OR AN OBLIGATION OF BANK
                                OF OKLAHOMA, N.A., ITS AFFILIATES, OR ANY BANK.
                                IT IS NOT INSURED OR GUARANTEED BY THE FEDERAL
                                DEPOSIT INSURANCE CORPORATION OR ANY GOVERNMENT
                                AGENCY.

                                Each Fund has its own investment goal and
                                strategies for reaching that goal. However, it
                                cannot be guaranteed that a Fund will achieve
                                its goal. Before investing, make sure that the
                                Fund's goal matches your own.

                                The portfolio manager invests each Fund's assets
                                in a way that the manager believes will help the
                                Fund achieve its goal. A manager's judgments
                                about the bond and stock markets, economy and
                                companies, and his method of investment
                                selection, may cause a Fund to underperform
                                other funds with similar objectives.
<PAGE>   39

    PROSPECTUS

                                       2

                                  (FLAG LOGO)

                           AMERICAN PERFORMANCE FUNDS

Fund Summaries
 MONEY MARKET FUNDS

                                U.S. Treasury Fund
                                ------------------------------------------------

                                INVESTMENT GOAL

                                Current income with liquidity and stability of
                                principal by investing in U.S. Treasury
                                obligations and repurchase agreements.

                                PRINCIPAL INVESTMENT STRATEGY

                                The U.S. Treasury Fund seeks current income with
                                liquidity and stability of principal by
                                investing exclusively in short-term obligations
                                backed by the full faith and credit of the U.S.
                                government, all of which may be subject to
                                repurchase agreements. The Fund normally invests
                                at least 65% of its assets in U.S. Treasury
                                obligations, some of which may be subject to
                                repurchase agreements. The Fund currently
                                maintains an average weighted portfolio maturity
                                of 60 days or less.

                                WHAT ARE THE MAIN RISKS OF INVESTING IN THIS
                                FUND?

                                Your investment in the Fund may be subject to
                                the following principal risks:

                                - INTEREST RATE RISK -- Interest rate risk
                                  involves the possibility that the Fund's yield
                                  will decrease due to a decline in interest
                                  rates.

                                - NET ASSET VALUE RISK -- The risk that the Fund
                                  will be unable to meet its goal of a constant
                                  $1 per share.

                                For more information about these risks please
                                refer to the section titled "Investment
                                Practices and Risks."

MATURITY:
A PORTFOLIO'S LEVEL OF INTEREST RATE EXPOSURE IS COMMONLY INDICATED BY THE TERM
MATURITY. GENERALLY SPEAKING, THE LONGER A PORTFOLIO'S MATURITY, THE GREATER ITS
LEVEL OF INTEREST RATE EXPOSURE.

(APPLE LOGO)
<PAGE>   40

    PROSPECTUS

                                       3

U.S. Treasury Fund (continued)

                                AN INVESTMENT IN THE FUND IS NOT A DEPOSIT OR AN
                                OBLIGATION OF BANK OF OKLAHOMA, N.A., ITS
                                AFFILIATES, OR ANY BANK, AND IT IS NOT INSURED
                                OR GUARANTEED BY THE FEDERAL DEPOSIT INSURANCE
                                CORPORATION OR ANY OTHER GOVERNMENT AGENCY.
                                ALTHOUGH THE FUND SEEKS TO PRESERVE THE VALUE OF
                                YOUR INVESTMENT AT $1 PER SHARE, IT IS POSSIBLE
                                TO LOSE MONEY BY INVESTING IN THE FUND.

                                PERFORMANCE INFORMATION

                                The bar chart and the performance table below
                                illustrate the risks and volatility of an
                                investment in the Fund. Of course, the Fund's
                                past performance does not necessarily indicate
                                how the Fund will perform in the future.

                                This bar chart shows changes in the Fund's
                                performance from year to year.*
                                 ANNUAL TOTAL RETURNS (PERIODS ENDED 12/31)

<TABLE>
<S>                                                           <C>
1991                                                                             5.49
1992                                                                              3.2
1993                                                                             2.49
1994                                                                             3.51
1995                                                                             5.22
1996                                                                             4.68
1997                                                                             4.86
1998                                                                             4.75
1999                                                                             4.35
</TABLE>


                                * The performance information shown above is
                                  based on a calendar year. The Fund's total
                                  return from 1/1/00 to 9/30/00 was 4.09%.


<TABLE>
                               <S>                    <C>    <C>    <C>
                               Best Quarter:          Q1     1991    1.53%
                               Worst Quarter:         Q4     1993    0.61%
</TABLE>
<PAGE>   41

U.S. Treasury Fund (continued)

    PROSPECTUS

                                       4
FUND SUMMARIES

                                This table shows the Fund's average annual total
                                returns for periods ending December 31, 1999.
                                AVERAGE ANNUAL TOTAL RETURNS (PERIODS ENDED
                                12/31/99)

<TABLE>
<CAPTION>
                                                                                Since
                                                                              Inception
                                                       1 Year      5 Years    (9/5/90)
                               --------------------------------------------------------
                               <S>                    <C>         <C>         <C>
                               U.S. Treasury Fund       4.35%       4.77%       4.39%
                               --------------------------------------------------------
</TABLE>

                                 YIELD

                                The 7-day yield for the period ended 12/31/99
                                was 4.40%.

                                You may obtain the most current yield
                                information for the Fund by calling (800)
                                762-7085.

YIELD:
ALL MUTUAL FUNDS MUST USE THE SAME FORMULAS TO CALCULATE YIELD AND EFFECTIVE
YIELD. THE FUND TYPICALLY ADVERTISES PERFORMANCE IN TERMS OF A 7-DAY YIELD AND
7-DAY EFFECTIVE YIELD AND MAY ADVERTISE TOTAL RETURN. THE 7-DAY YIELD QUOTATION
MORE CLOSELY REFLECTS CURRENT EARNINGS OF THE FUND THAN THE TOTAL RETURN
QUOTATION. THE 7-DAY EFFECTIVE YIELD WILL BE SLIGHTLY HIGHER THAN THE YIELD
BECAUSE OF THE COMPOUNDING EFFECT OF THE ASSUMED REINVESTMENT. CURRENT YIELDS
AND EFFECTIVE YIELDS FLUCTUATE DAILY AND WILL VARY DUE TO FACTORS SUCH AS
INTEREST RATES AND THE QUALITY, LENGTH OF MATURITIES, AND TYPE OF INVESTMENTS IN
THE PORTFOLIO.

(APPLE LOGO)
<PAGE>   42

U.S. Treasury Fund (continued)

    PROSPECTUS

                                       5

FEES AND EXPENSES
------------------------------------------------
Shareholder Fees
This table describes the shareholder fees that
you pay if you purchase or sell Fund shares. You
would pay these fees directly from your
investment in the Fund.

Maximum Sales Charge (Load) Imposed on Purchases
(as a percentage of offering price)           0%
Maximum Deferred Sales Charge (Load)          0%
(as a percentage of net asset value)

------------------------------------------------
Annual Fund Operating Expenses
This table describes the Fund's expenses that
you pay indirectly if you hold Fund shares.

Investment Advisory Fees                   0.40%
Distribution/Service (12b-1) Fees         0.25%*
Other Expenses                             0.31%
TOTAL ANNUAL FUND OPERATING EXPENSES      0.96%*

------------------------------------------------
* During the last fiscal year, the Distributor
  agreed to waive Distribution/Service (12b-1)
  Fees by 0.25%. This fee waiver is expected to
  continue through December 31, 2001.
  Accordingly, actual annual fund operating
  expenses were as follows:

      Investment Advisory Fees             0.40%
      Distribution/Service (12b-1) Fees    0.00%
      Other Expenses                       0.31%
      TOTAL ANNUAL FUND OPERATING
      EXPENSES                             0.71%

------------------------------------------------
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. The Example also
assumes that each year your investment has a 5%
return and Fund expenses remain the same.
Although your actual costs and returns may be
different, your approximate costs of investing
$10,000 in the Fund would be:

<TABLE>
<CAPTION>
   1 Year        3 Years        5 Years        10 Years
---------------------------------------------------------
<S>            <C>            <C>            <C>
98..$...           $306           $531          $1,178
</TABLE>

ADDITIONAL
INFORMATION

DIVIDENDS



Dividends are paid monthly.


INVESTMENT ADVISER
Bank of Oklahoma, N.A.
Tulsa, OK

INCEPTION DATE
September 5, 1990

NET ASSETS AS OF
NOVEMBER 30, 2000

$659 million


SUITABLE FOR IRAS
Yes

MINIMUM INITIAL INVESTMENT
$1,000

AMERICAN PERFORMANCE FUND NUMBER
002

CUSIP NUMBER
028846103

TICKER SYMBOL
APGXX
<PAGE>   43

    PROSPECTUS

                                       6
FUND SUMMARIES

                                Cash Management Fund
                                ------------------------------------------------

                                INVESTMENT GOAL

                                Current income with liquidity and stability of
                                principal by investing in high-quality,
                                short-term debt instruments.

                                PRINCIPAL INVESTMENT STRATEGY

                                The Cash Management Fund seeks current income
                                with liquidity and stability of principal by
                                investing in money market instruments which
                                present minimal credit risks. The Fund invests
                                primarily in high-quality instruments including
                                obligations issued by the U.S. government or its
                                agencies or instrumentalities, commercial paper,
                                medium-term notes, certificates of deposit, time
                                deposits, bankers' acceptances and repurchase
                                agreements. These obligations may be variable or
                                floating rate instruments or variable amount
                                master demand notes. To be considered
                                high-quality, a security must be rated in one of
                                the two highest credit quality categories for
                                short-term securities or determined by the
                                Fund's Adviser to be of comparable quality. The
                                Fund currently maintains an average weighted
                                portfolio maturity of 35 to 75 days.


MATURITY:
A PORTFOLIO'S LEVEL OF INTEREST RATE EXPOSURE IS COMMONLY INDICATED BY THE TERM
MATURITY. GENERALLY SPEAKING, THE LONGER A PORTFOLIO'S MATURITY, THE GREATER ITS
LEVEL OF INTEREST RATE EXPOSURE.


(APPLE LOGO)
<PAGE>   44

    PROSPECTUS

                                       7

Cash Management Fund (continued)

                                WHAT ARE THE MAIN RISKS OF INVESTING IN THIS
                                FUND?

                                Your investment in the Fund may be subject to
                                the following principal risks:

                                - CREDIT RISK -- Credit risk is the possibility
                                  that an issuer cannot make timely interest and
                                  principal payments on its securities. Because
                                  the Fund will only invest in securities
                                  believed to pose minimal credit risk, it is
                                  unlikely that losses due to credit risk will
                                  cause a decline in the value of your
                                  investment. However, even if not severe enough
                                  to cause such a decline in principal value,
                                  credit losses could reduce the Fund's yield.
                                  In general, lower-rated securities have higher
                                  credit risks.

                                - INTEREST RATE RISK -- Interest rate risk
                                  involves the possibility that the Fund's yield
                                  will decrease due to a decline in interest
                                  rates.

                                - NET ASSET VALUE RISK -- The risk that the Fund
                                  will be unable to meet its goal of a constant
                                  $1 per share.

                                For more information about these risks please
                                refer to the section titled "Investment
                                Practices and Risks."

                                AN INVESTMENT IN THE FUND IS NOT A DEPOSIT OR AN
                                OBLIGATION OF BANK OF OKLAHOMA, N.A., ITS
                                AFFILIATES, OR ANY BANK, AND IT IS NOT INSURED
                                OR GUARANTEED BY THE FEDERAL DEPOSIT INSURANCE
                                CORPORATION OR ANY OTHER GOVERNMENT AGENCY.
                                ALTHOUGH THE FUND SEEKS TO PRESERVE THE VALUE OF
                                YOUR INVESTMENT AT $1 PER SHARE, IT IS POSSIBLE
                                TO LOSE MONEY BY INVESTING IN THE FUND.
<PAGE>   45

Cash Management Fund (continued)

    PROSPECTUS

                                       8
FUND SUMMARIES

                                PERFORMANCE INFORMATION
                                The bar chart and the performance table below
                                illustrate the risks and volatility of an
                                investment in the Fund. Of course, the Fund's
                                past performance does not necessarily indicate
                                how the Fund will perform in the future.

                                This bar chart shows changes in the Fund's
                                performance from year to year.*

                                 ANNUAL TOTAL RETURNS (PERIODS ENDED 12/31)

<TABLE>
<S>                                                           <C>
1991                                                                             6.19
1992                                                                             3.57
1993                                                                             2.78
1994                                                                             3.76
1995                                                                             5.52
1996                                                                             5.02
1997                                                                             5.11
1998                                                                             5.01
1999                                                                             4.72
</TABLE>


                                * The performance information shown above is
                                  based on a calendar year. The Fund's total
                                  return from 1/1/00 to 9/30/00 was 4.33%.


<TABLE>
                               <S>             <C>    <C>     <C>
                               Best Quarter:   Q1     1991     1.77%
                               Worst Quarter:  Q4     1993     0.67%
</TABLE>

                                This table shows the Fund's average annual total
                                returns for periods ending December 31, 1999.

                                 AVERAGE ANNUAL TOTAL RETURNS
                                 (PERIODS ENDED 12/31/99)

<TABLE>
<CAPTION>
                                                                             Since
                                                                           Inception
                                                      1 Year    5 Years    (9/21/90)
                               ------------------------------------------------------
                               <S>                    <C>       <C>        <C>
                               Cash Management Fund    4.72%     5.08%        4.72%
                               ------------------------------------------------------
</TABLE>

                                 YIELD

                                For the period ended 12/31/99 the 7-day yield
                                was 5.10%.

                                You may obtain the most current yield
                                information for the Fund by calling (800)
                                762-7085.

YIELD: ALL MUTUAL FUNDS MUST USE THE SAME FORMULAS TO CALCULATE YIELD AND
EFFECTIVE YIELD. THE FUND TYPICALLY ADVERTISES PERFORMANCE IN TERMS OF A 7-DAY
YIELD AND 7-DAY EFFECTIVE YIELD AND MAY ADVERTISE TOTAL RETURN. THE 7-DAY YIELD
QUOTATION MORE CLOSELY REFLECTS CURRENT EARNINGS OF THE FUND THAN THE TOTAL
RETURN QUOTATION. THE 7-DAY EFFECTIVE YIELD WILL BE SLIGHTLY HIGHER THAN THE
YIELD BECAUSE OF THE COMPOUNDING EFFECT OF THE ASSUMED REINVESTMENT. CURRENT
YIELDS AND EFFECTIVE YIELDS FLUCTUATE DAILY AND WILL VARY DUE TO FACTORS SUCH AS
INTEREST RATES AND THE QUALITY, LENGTH OF MATURITIES, AND TYPE OF INVESTMENTS IN
THE PORTFOLIO.

(APPLE LOGO)
<PAGE>   46

Cash Management Fund (continued)

    PROSPECTUS

                                       9

FEES AND EXPENSES
------------------------------------------------
Shareholder Fees
This table describes the shareholder fees that
you pay if you purchase or sell Fund shares. You
would pay these fees directly from your
investment in the Fund.

Maximum Sales Charge (Load) Imposed on Purchases
(as a percentage of offering price)           0%
Maximum Deferred Sales Charge (Load)          0%
(as a percentage of net asset value)

------------------------------------------------
Annual Fund Operating Expenses
This table describes the Fund's expenses that
you pay indirectly if you hold Fund shares.

Investment Advisory Fees                  0.40%*
Distribution/Service (12b-1) Fees         0.25%*
Other Expenses                            0.30%*
TOTAL ANNUAL FUND OPERATING EXPENSES      0.95%*

------------------------------------------------

* During the last fiscal year, the Adviser
  waived 0.11% of its Investment Advisory Fees,
  the Distributor waived 0.25% of its
  Distribution/Service (12b-1) Fees, and the
  Administrator waived 0.04% of Other Expenses.
  These fee waivers are expected to continue
  through December 31, 2001. Accordingly, actual
  annual fund operating expenses were as
  follows:


      Investment Advisory Fees             0.29%
      Distribution/Service (12b-1) Fees    0.00%
      Other Expenses                       0.26%
      TOTAL ANNUAL FUND OPERATING
      EXPENSES                             0.55%

------------------------------------------------
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. The Example also
assumes that each year your investment has a 5%
return and Fund expenses remain the same.
Although your actual costs and returns may be
different, your approximate costs of investing
$10,000 in the Fund would be:

<TABLE>
<CAPTION>
   1 Year        3 Years        5 Years        10 Years
---------------------------------------------------------
<S>            <C>            <C>            <C>
    $97            $303           $525          $1,166
</TABLE>

ADDITIONAL
INFORMATION

DIVIDENDS



Dividends are paid monthly.


INVESTMENT ADVISER
Bank of Oklahoma, N.A.
Tulsa, OK

INCEPTION DATE
September 21, 1990

NET ASSETS AS OF
NOVEMBER 30, 2000

$611 million


SUITABLE FOR IRAS
Yes

MINIMUM INITIAL INVESTMENT
$1,000

AMERICAN PERFORMANCE FUND NUMBER
001

CUSIP NUMBER
028846202

TICKER SYMBOL
APCXX
<PAGE>   47

    PROSPECTUS

                                       10
FUND SUMMARIES

 BOND FUNDS

                                Bond Fund
                                ------------------------------------------------

                                INVESTMENT GOAL

                                Total return by investing in U.S. government and
                                investment grade corporate debt securities and
                                mortgage related securities.

                                PRINCIPAL INVESTMENT STRATEGY

                                The Bond Fund seeks to maximize total return by
                                investing primarily in an actively managed,
                                diversified portfolio of short, intermediate,
                                and long-term bonds and other fixed income
                                securities. To pursue this goal, the Fund
                                normally invests at least 65% of its assets in
                                bonds. The Fund invests primarily in investment
                                grade or comparable quality debt obligations
                                such as bonds, notes and debentures, and bills
                                issued by U.S. corporations or by the U.S.
                                government, its agencies, or instrumentalities,
                                municipal securities, and derivatives including
                                mortgage-related securities and asset-based
                                securities. The Fund invests in debt obligations
                                only if they carry a rating within the three
                                highest rating categories assigned by a
                                nationally recognized statistical ratings
                                organization (e.g., at least "A" from Moody's or
                                Standard & Poor's). The Fund also invests in
                                money market instruments. If the rating of a
                                security is downgraded after purchase, the
                                Adviser will determine whether it is in the best
                                interest of the Fund's shareholders to continue
                                to hold the security. The Fund will seek to
                                increase the value of your investment through a
                                combination of income and capital gains.
CREDIT QUALITY:
A BOND'S CREDIT QUALITY DEPENDS ON THE ISSUER'S ABILITY TO PAY INTEREST ON THE
BOND AND TO REPAY THE DEBT. BONDS ISSUED OR BACKED BY THE U.S. GOVERNMENT OFFER
MAXIMUM CREDIT PROTECTION; BONDS ISSUED OR BACKED BY FOREIGN GOVERNMENTS CAN
CARRY CONSIDERABLY MORE RISK. THE LOWER THE BOND'S CREDIT RATING BY A RATING
AGENCY (FOR EXAMPLE, MOODY'S OR STANDARD & POOR'S), THE GREATER THE CHANCE THAT
THE BOND ISSUER WILL DEFAULT, OR FAIL TO MEET ITS PAYMENT OBLIGATIONS. BONDS
RATED IN ONE OF THE FOUR HIGHEST RATING CATEGORIES ARE CONSIDERED "INVESTMENT
GRADE."

(APPLE LOGO)
<PAGE>   48

    PROSPECTUS

                                       11

Bond Fund (continued)
The Fund will maintain a dollar-weighted average portfolio maturity of seven
years or more and, generally, of no longer than ten years. The average portfolio
maturity will fluctuate depending on the outlook for interest rate changes. The
ability to change the average portfolio maturity allows the Fund to meet its
objective of maximizing total return.

                                In managing the portfolio, the manager uses a
                                "top down" investment management approach
                                focusing on actual or anticipated changes or
                                trends in interest rates, the financial markets,
                                or the economy.

                                In addition to the securities described above,
                                the Fund may invest in other debt securities.

                                The Fund may, from time to time, take temporary
                                defensive positions that are inconsistent with
                                the Fund's principal investment strategies in
                                attempting to respond to adverse market,
                                economic, political, or other conditions. In
                                these and in other cases, the Fund may not
                                achieve its investment goal.

INTEREST RATES:
ONE OF THE MOST SIGNIFICANT FACTORS AFFECTING THE PERFORMANCE OF A BOND FUND
                                IS THE RISE AND FALL OF INTEREST RATES. WHEN
                                INTEREST RATES RISE, A BOND'S VALUE GENERALLY
                                DECLINES.

BOND MATURITIES:
A BOND IS ISSUED WITH A SPECIFIC MATURITY DATE -- THE DATE WHEN THE BOND'S
ISSUER, OR SELLER, MUST PAY BACK THE BOND'S INITIAL VALUE. BOND MATURITIES
GENERALLY RANGE FROM LESS THAN ONE YEAR (SHORT-TERM) TO 30 YEARS (LONG-TERM).
THE LONGER A BOND'S MATURITY, THE MORE RISK YOU, AS A BOND INVESTOR, FACE AS
INTEREST RATES RISE. LONG-TERM BONDS ARE MORE SUITABLE FOR INVESTORS WILLING TO
TAKE GREATER RISKS; SHORT-TERM BOND INVESTORS SHOULD BE WILLING TO ACCEPT LOWER
YIELDS IN RETURN FOR LESS FLUCTUATION IN THE VALUE OF THEIR INVESTMENT.

(APPLE LOGO)

                                (APPLE LOGO)
<PAGE>   49

Bond Fund (continued)

    PROSPECTUS

                                       12
FUND SUMMARIES

                                WHAT ARE THE MAIN RISKS OF INVESTING IN THIS
                                FUND?

                                Loss of money is a risk of investing in the
                                Fund. In addition, your investment in the Fund
                                may be subject to the following principal risks:

                                - CREDIT RISK -- Credit risk is the possibility
                                  that an issuer cannot make timely interest and
                                  principal payments on its debt obligations,
                                  such as bonds. In general, lower-rated bonds
                                  have higher credit risks. However, because the
                                  Fund invests in investment grade debt
                                  obligations, credit risk is minimized.

                                - INTEREST RATE RISK -- Interest rate risk
                                  involves the possibility that the value of the
                                  Fund's investments will decline due to an
                                  increase in interest rates. In general, the
                                  longer a security's maturity, the greater the
                                  interest rate risk.

                                - PREPAYMENT/CALL RISK -- Prepayment risk is the
                                  chance that the repayment of mortgages backing
                                  a security will occur sooner than expected.
                                  Call risk is the possibility that during
                                  periods of falling interest rates, a bond
                                  issuer will "call" -- or repay -- its
                                  high-yielding bond before the bond's maturity
                                  date. In each case, the Fund may be forced to
                                  reinvest in securities with a lower yield. It
                                  may also lose any premium paid for the bond.
                                  Changes in prepayment/call rates can result in
                                  greater price and yield volatility.

                                For more information about these risks please
                                refer to the section titled "Investment
                                Practices and Risks."

                                AN INVESTMENT IN THE FUND IS NOT A DEPOSIT OR AN
                                OBLIGATION OF BANK OF OKLAHOMA, N.A., ITS
                                AFFILIATES, OR ANY BANK, AND IS NOT INSURED OR
                                GUARANTEED BY THE FEDERAL DEPOSIT INSURANCE
                                CORPORATION OR ANY OTHER GOVERNMENT AGENCY.
<PAGE>   50

Bond Fund (continued)

    PROSPECTUS

                                       13

                                PERFORMANCE INFORMATION

                                The bar chart and the performance table below
                                illustrate the risks and volatility of an
                                investment in the Fund. Of course, the Fund's
                                past performance does not necessarily indicate
                                how the Fund will perform in the future.

                                This bar chart shows changes in the Fund's
                                performance from year to year.*
                                ANNUAL TOTAL RETURNS (PERIODS ENDED 12/31)

<TABLE>
<S>                                                           <C>
1991                                                                             15.34
1992                                                                              6.07
1993                                                                              10.4
1994                                                                             -3.67
1995                                                                             16.12
1996                                                                              1.69
1997                                                                             10.04
1998                                                                              8.22
1999                                                                             -0.77
</TABLE>


                                * The performance information shown above is
                                  based on a calendar year. The Fund's total
                                  return from 1/1/00 to 9/30/00 was 6.48%. Sales
                                  charges are not reflected in the bar chart
                                  and, if they were reflected, returns would be
                                  less than those shown.


<TABLE>
                               <S>             <C>    <C>     <C>
                               Best Quarter:   Q3     1991     5.94%
                               Worst Quarter:  Q1     1994    -2.92%
</TABLE>

                                This table compares the Fund's average annual
                                total returns for periods ending December 31,
                                1999 to those of the Salomon Brothers Broad
                                (Investment Grade) Bond Index.
                                AVERAGE ANNUAL TOTAL RETURNS (PERIODS ENDED
                                12/31/99)

<TABLE>
<CAPTION>
                                                                                Since
                                                                              Inception
                                                       1 Year      5 Years    (9/28/90)
                               --------------------------------------------------------
                               <S>                    <C>         <C>         <C>
                               Bond Fund (reflects
                                 maximum sales
                                 charge of 4.00%)      -4.70%       6.02%       6.82%
                               --------------------------------------------------------
                               Salomon Brothers
                                 Broad (Investment
                                 Grade) Bond
                                 Index(1)              -0.83%       7.43%       7.97%
                               --------------------------------------------------------
</TABLE>

                                (1) The Salomon Brothers Broad (Investment
                                    Grade) Bond Index is an unmanaged index
                                    comprised of investment grade corporate and
                                    U.S. government bonds.
<PAGE>   51

    PROSPECTUS

                                       14
FUND SUMMARIES

Bond Fund (continued)

FEES AND EXPENSES
------------------------------------------------
Shareholder Fees
This table describes the shareholder fees that
you pay if you purchase or sell Fund shares. You
would pay these fees directly from your
investment in the Fund.

Maximum Sales Charge (Load) Imposed on Purchases
(as a percentage of offering price)       4.00%*
Maximum Deferred Sales Charge (Load)        0%**
(as a percentage of net asset value)

------------------------------------------------
*  The sales charges imposed on purchases of
   shares decreases as the purchase amount
   increases. In addition, a sales charge is not
   imposed on purchases of shares by certain
   investors. Please refer to the section titled
   "Your Account -- How Sales Charges are
   Calculated."
** A contingent deferred sales charge of 1.00%
   will be assessed against the proceeds of any
   redemption request relating to shares
   purchased without a sales charge in reliance
   upon the waiver accorded to purchases in the
   amount of $1 million or more, if the
   redemption request is made within one year of
   the purchase date. Please refer to the
   section titled "Your Account -- How Sales
   Charges are Calculated."

------------------------------------------------
Annual Fund Operating Expenses
This table describes the Fund's expenses that
you pay indirectly if you hold Fund shares.

Investment Advisory Fees                  0.55%+
Distribution/Service (12b-1) Fees          0.25%
Other Expenses                             0.37%
TOTAL ANNUAL FUND OPERATING EXPENSES      1.17%+

------------------------------------------------
+  During the last fiscal year, the Adviser
   waived 0.20% of its Investment Advisory Fee.
   This fee waiver is expected to continue
   through December 31, 2001. Accordingly,
   actual annual fund operating expenses were as
   follows:

      Investment Advisory Fees             0.35%
      Distribution/Service (12b-1) Fees    0.25%
      Other Expenses                       0.37%
      TOTAL ANNUAL FUND OPERATING
      EXPENSES                             0.97%
------------------------------------------------
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. The Example also
assumes that each year your investment has a 5%
return and Fund expenses remain the same.
Although your actual costs and returns may be
different, your approximate costs of investing
$10,000 in the Fund would be:

<TABLE>
<CAPTION>
   1 Year        3 Years        5 Years        10 Years
---------------------------------------------------------
<S>            <C>            <C>            <C>
    $514           $757          $1,018         $1,764
</TABLE>

ADDITIONAL
INFORMATION

DIVIDENDS
AND CAPITAL GAINS
Dividends are paid monthly; capital gains, if any, are paid annually.

INVESTMENT ADVISER
Bank of Oklahoma, N.A.
Tulsa, OK

INCEPTION DATE
September 28, 1990

NET ASSETS AS OF
NOVEMBER 30, 2000

$60 million


SUITABLE FOR IRAS
Yes

MINIMUM INITIAL INVESTMENT
$1,000

NEWSPAPER ABBREVIATION
Am Perform Bond

AMERICAN PERFORMANCE FUND NUMBER
005

CUSIP NUMBER
028846301

TICKER SYMBOL
APBDX
<PAGE>   52

    PROSPECTUS

                                       15

                                Intermediate Bond Fund
                                ------------------------------------------------

                                INVESTMENT GOAL

                                Total return by investing in U.S. government and
                                investment grade corporate debt securities and
                                mortgage related securities.

                                PRINCIPAL INVESTMENT STRATEGY

                                The Intermediate Bond Fund seeks to maximize
                                total return by investing primarily in an
                                actively managed, diversified portfolio of
                                intermediate bond and other fixed income
                                securities. To pursue this goal, the Fund
                                normally invests at least 65% of its total
                                assets in bonds. The Fund invests primarily in
                                investment grade or comparable quality debt
                                obligations such as bonds, notes and debentures,
                                and bills issued by U.S. corporations or the
                                U.S. government, its agencies, or
                                instrumentalities, municipal securities, and
                                derivatives including mortgage-related
                                securities and asset-backed securities. The Fund
                                invests in debt obligations only if they carry a
                                rating within the three highest rating
                                categories assigned by a nationally recognized
                                statistical ratings organization (e.g., at least
                                "A" from Moody's or Standard & Poor's). The Fund
                                also invests in money market instruments. If the
                                rating of a security is downgraded after
                                purchase, the Adviser will determine whether it
                                is in the best interest of the Fund's
                                shareholders to continue to hold the security.
                                The Fund will seek to increase the value of your
                                investment through a combination of income and
                                capital gains.
CREDIT QUALITY:
A BOND'S CREDIT QUALITY DEPENDS ON THE ISSUER'S ABILITY TO PAY INTEREST ON THE
BOND AND TO REPAY THE DEBT. BONDS ISSUED OR BACKED BY THE U.S. GOVERNMENT OFFER
MAXIMUM CREDIT PROTECTION; BONDS ISSUED OR BACKED BY FOREIGN GOVERNMENTS CAN
CARRY CONSIDERABLY MORE RISK. THE LOWER THE BOND'S CREDIT RATING BY A RATING
AGENCY (FOR EXAMPLE, MOODY'S OR STANDARD & POOR'S), THE GREATER THE CHANCE THAT
THE BOND ISSUER WILL DEFAULT, OR FAIL TO MEET ITS PAYMENT OBLIGATIONS. BONDS
RATED IN ONE OF THE FOUR HIGHEST RATING CATEGORIES ARE CONSIDERED "INVESTMENT
GRADE."

(APPLE LOGO)
<PAGE>   53

    PROSPECTUS

                                       16
FUND SUMMARIES

Intermediate Bond Fund (continued)
                                The Fund will maintain a dollar-weighted average
                                portfolio maturity from three to ten years, and
                                generally of no longer than five years. The
                                average portfolio maturity will fluctuate
                                depending on the outlook for interest rate
                                changes. The ability to change the average
                                portfolio maturity allows the Fund to meet its
                                objective of maximizing total return.

                                In managing the portfolio, the manager uses a
                                "top down" investment management approach
                                focusing on actual or anticipated changes or
                                trends in interest rates, the financial markets,
                                or the economy.

                                In addition to the securities described above,
                                the Fund may invest in other debt securities.

                                The Fund may from time to time, take temporary
                                defensive positions that are inconsistent with
                                the Fund's principal investment strategies in
                                attempting to respond to adverse market,
                                economic, political, or other conditions. In
                                these and in other cases, the Fund may not
                                achieve its investment goal.

INTEREST RATES:
ONE OF THE MOST SIGNIFICANT FACTORS AFFECTING THE PERFORMANCE OF A BOND FUND
                                IS THE RISE AND FALL OF INTEREST RATES. WHEN
                                INTEREST RATES RISE, A BOND'S VALUE GENERALLY
                                DECLINES.

                                BOND MATURITIES:
                                A BOND IS ISSUED WITH A SPECIFIC MATURITY
                                DATE -- THE DATE WHEN THE BOND'S ISSUER, OR
                                SELLER, MUST PAY BACK THE BOND'S INITIAL VALUE.
                                BOND MATURITIES GENERALLY RANGE FROM LESS THAN
                                ONE YEAR (SHORT-TERM) TO 30 YEARS (LONG-TERM).
                                THE LONGER A BOND'S MATURITY, THE MORE RISK YOU,
                                AS A BOND INVESTOR, FACE AS INTEREST RATES RISE.
                                LONG-TERM BONDS ARE MORE SUITABLE FOR INVESTORS
                                WILLING TO TAKE GREATER RISKS; SHORT-TERM BOND
                                INVESTORS SHOULD BE WILLING TO ACCEPT LOWER
                                YIELDS IN RETURN FOR LESS FLUCTUATION IN THE
                                VALUE OF THEIR INVESTMENT.

(APPLE LOGO)

                                (APPLE LOGO)
<PAGE>   54

    PROSPECTUS

                                       17

Intermediate Bond Fund (continued)

                                WHAT ARE THE MAIN RISKS OF INVESTING IN THIS
                                FUND?

                                Loss of money is a risk of investing in the
                                Fund. In addition, your investment in the Fund
                                may be subject to the following principal risks:

                                - CREDIT RISK -- Credit risk is the possibility
                                  that an issuer cannot make timely interest and
                                  principal payments on its debt obligations,
                                  such as bonds. In general, lower-rated bonds
                                  have higher credit risks. However, because the
                                  Fund invests in investment grade debt
                                  obligations, credit risk is minimized.

                                - INTEREST RATE RISK -- Interest rate risk
                                  involves the possibility that the value of the
                                  Fund's investments will decline due to an
                                  increase in interest rates. In general, the
                                  longer a security's maturity, the greater the
                                  interest rate risk.

                                - PREPAYMENT/CALL RISK -- Prepayment risk is the
                                  chance that the repayment of mortgages backing
                                  a security will occur sooner than expected.
                                  Call risk is the possibility that during
                                  periods of falling interest rates, a bond
                                  issuer will "call" -- or repay -- its
                                  high-yielding bond before the bond's maturity
                                  date. In each case, the Fund may be forced to
                                  reinvest in securities with a lower yield. It
                                  may also lose any premium paid for the bond.
                                  Changes in prepayment/call rates can result in
                                  greater price and yield volatility.

                                For more information about these risks please
                                refer to the section titled "Investment
                                Practices and Risks."

                                AN INVESTMENT IN THE FUND IS NOT A DEPOSIT OR AN
                                OBLIGATION OF BANK OF OKLAHOMA, N.A., ITS
                                AFFILIATES, OR ANY BANK, AND IS NOT INSURED OR
                                GUARANTEED BY THE FEDERAL DEPOSIT INSURANCE
                                CORPORATION OR ANY OTHER GOVERNMENT AGENCY.
<PAGE>   55

Intermediate Bond Fund (continued)

    PROSPECTUS

                                       18
FUND SUMMARIES

                                PERFORMANCE INFORMATION
                                The bar chart and the performance table below
                                illustrate the risks and volatility of an
                                investment in the Fund. Of course, the Fund's
                                past performance does not necessarily indicate
                                how the Fund will perform in the future.

                                This bar chart shows changes in the Fund's
                                performance from year to year.*
                                 ANNUAL TOTAL RETURNS (PERIODS ENDED 12/31)

<TABLE>
<S>                                                           <C>
1991                                                                                14
1992                                                                              5.79
1993                                                                              8.74
1994                                                                              -2.5
1995                                                                             12.24
1996                                                                              2.93
1997                                                                              8.05
1998                                                                              6.79
1999                                                                              1.57
</TABLE>


                                * The performance information shown above is
                                  based on a calendar year. The Fund's total
                                  return from 1/1/00 to 9/30/00 was 5.79%. Sales
                                  charges are not reflected in the bar chart
                                  and, if they were reflected, returns would be
                                  less than those shown.


<TABLE>
                               <S>                       <C>       <C>
                               Best Quarter:               Q4  1991   5.07%
                               Worst Quarter:              Q1  1994  -2.10%
</TABLE>

                                This table compares the Fund's average annual
                                total returns for periods ending December 31,
                                1999 to those of the Lehman Brothers
                                Intermediate Government/Corporate Bond Index.
                                 AVERAGE ANNUAL TOTAL RETURNS
                                 (PERIODS ENDED 12/31/99)

<TABLE>
<CAPTION>
                                                                                Since
                                                                              Inception
                                                       1 Year      5 Years    (9/28/90)
                               --------------------------------------------------------
                               <S>                    <C>         <C>         <C>
                               Intermediate Bond       -1.45%       5.60%       6.27%
                                 Fund (reflects
                                 maximum sales
                                 charge of 3.00%)
                               --------------------------------------------------------
                               Lehman Brothers          0.39%       7.09%       7.31%
                                 Intermediate
                                 Government/Corporate
                                 Bond Index(1)
                               --------------------------------------------------------
</TABLE>

                                (1) The Lehman Brothers Intermediate
                                    Government/Corporate Bond Index is an
                                    unmanaged index comprised of investment
                                    grade government and corporate debt
                                    securities with maturities between 1 and 10
                                    years.
<PAGE>   56

Intermediate Bond Fund (continued)

    PROSPECTUS

                                       19

FEES AND EXPENSES
------------------------------------------------
Shareholder Fees
This table describes the shareholder fees that
you pay if you purchase or sell Fund shares. You
would pay these fees directly from your
investment in the Fund.

Maximum Sales Charge (Load) Imposed on Purchases
(as a percentage of offering price)       3.00%*

Maximum Deferred Sales Charge (Load)        0%**
(as a percentage of net asset value)
------------------------------------------------

*  The sales charges imposed on purchases of
   shares decreases as the purchase amount
   increases. In addition, a sales charge is not
   imposed on purchases of shares by certain
   investors. Please refer to the section titled
   "Your Account -- How Sales Charges are
   Calculated."

** A contingent deferred sales charge of 0.75%
   will be assessed against the proceeds of any
   redemption request relating to shares
   purchased without a sales charge in reliance
   upon the waiver accorded to purchases in the
   amount of $1 million or more, if the
   redemption request is made within one year of
   the purchase date. Please refer to the
   section titled "Your Account -- How Sales
   Charges are Calculated."

------------------------------------------------
Annual Fund Operating Expenses
This table describes the Fund's expenses that
you pay indirectly if you hold Fund shares.
Investment Advisory Fees                  0.55%+
Distribution/Service (12b-1) Fees          0.25%
Other Expenses                             0.37%
TOTAL ANNUAL FUND OPERATING EXPENSES      1.17%+

------------------------------------------------

+ During the last fiscal year, the Adviser
  waived 0.20% of its Investment Advisory Fees
  and various parties reimbursed 0.01% of Other
  Expenses. The fee waiver and reimbursements
  are expected to continue through December 31,
  2001. Accordingly, actual annual fund
  operating expenses were as follows:


      Investment Advisory Fees             0.35%
      Distribution/Service (12b-1) Fees    0.25%

      Other Expenses                       0.36%


      TOTAL ANNUAL FUND OPERATING
      EXPENSES                             0.96%

------------------------------------------------
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. The Example also
assumes that each year your investment has a 5%
return and Fund expenses remain the same.
Although your actual costs and returns may be
different, your approximate costs of investing
$10,000 in the Fund would be:

<TABLE>
<CAPTION>
   1 Year        3 Years        5 Years        10 Years
---------------------------------------------------------
<S>            <C>            <C>            <C>
    $416           $660           $924          $1,678
</TABLE>

ADDITIONAL
INFORMATION
DIVIDENDS
AND CAPITAL GAINS
Dividends are paid monthly; capital gains, if any, are paid annually.

INVESTMENT ADVISER
Bank of Oklahoma, N.A.
Tulsa, OK

INCEPTION DATE
September 28, 1990

NET ASSETS AS OF
NOVEMBER 30, 2000
$86 million

SUITABLE FOR IRAS
Yes

MINIMUM INITIAL
INVESTMENT
$1,000

NEWSPAPER
ABBREVIATION
Am Perform IntBd

AMERICAN PERFORMANCE
FUND NUMBER
006

CUSIP NUMBER
028846400

TICKER SYMBOL
APFBX
<PAGE>   57

    PROSPECTUS

                                       20
FUND SUMMARIES

                                Intermediate Tax-Free Bond Fund
                                ------------------------------------------------

                                INVESTMENT GOAL

                                High current income exempt from federal income
                                tax by investing in investment grade municipal
                                securities.

                                PRINCIPAL INVESTMENT STRATEGY

                                The Intermediate Tax-Free Bond Fund seeks
                                current income, consistent with the preservation
                                of capital, that is exempt from federal income
                                taxes, by investing in a diversified portfolio
                                of intermediate term bonds and other fixed
                                income securities.
                                In pursuing this goal, the Fund invests at least
                                65% of its assets in investment grade or
                                comparable quality municipal bonds and
                                debentures. Additionally, the Fund will normally
                                invest at least 80% of its assets in municipal
                                securities which pay interest that is not
                                subject to federal income tax or federal
                                alternative minimum tax for shareholders who are
                                individuals. The Fund invests in municipal
                                securities which are within the three highest
                                rating groups assigned by a nationally
                                recognized statistical ratings organization
                                (NRSRO), in the case of bonds (e.g. at least "A"
                                by Moody's or S&P); rated within the highest
                                ratings category assigned by an NRSRO, in the
                                case of notes (e.g., "SP-1" by S&P or "MIG-1" by
                                Moody's); rated in the highest ratings category
                                assigned by an NRSRO, in the case of tax-exempt
                                commercial paper (e.g., "A-1" or higher by S&P
                                or "Prime-1" by Moody's); or rated in the
                                highest ratings category assigned by an NRSRO,
                                in the case of variable rate demand obligations,
                                (e.g., "VMIG-1" by Moody's).

MUNICIPAL BONDS:
ARE SECURITIES ISSUED BY STATE AND LOCAL
                                GOVERNMENTS AND REGIONAL GOVERNMENTAL
                                AUTHORITIES AS A WAY OF RAISING MONEY FOR PUBLIC
                                CONSTRUCTION PROJECTS (FOR EXAMPLE, HIGHWAYS,
                                AIRPORTS, OR HOUSING); FOR OPERATING EXPENSES;
                                OR FOR LOANS TO PUBLIC INSTITUTIONS AND
                                FACILITIES.
CREDIT QUALITY:
A BOND'S CREDIT QUALITY DEPENDS ON THE ISSUER'S ABILITY TO PAY INTEREST ON THE
BOND AND TO REPAY THE DEBT. BONDS ISSUED OR BACKED BY THE U.S. GOVERNMENT OFFER
MAXIMUM CREDIT PROTECTION; BONDS ISSUED OR BACKED BY FOREIGN GOVERNMENTS CAN
CARRY CONSIDERABLY MORE RISK. THE LOWER THE BOND'S CREDIT RATING BY A RATING
AGENCY (FOR EXAMPLE, MOODY'S OR STANDARD & POOR'S), THE GREATER THE CHANCE THAT
THE BOND ISSUER WILL DEFAULT, OR FAIL TO MEET ITS PAYMENT OBLIGATIONS. BONDS
RATED IN ONE OF THE FOUR HIGHEST RATING CATEGORIES ARE CONSIDERED "INVESTMENT
GRADE."

(APPLE LOGO)

                                (APPLE LOGO)
<PAGE>   58

Intermediate Tax-Free Bond Fund (continued)

    PROSPECTUS

                                       21

Corporate shareholders will be required to include all tax-exempt interest
dividends in determining their federal alternative minimum tax. The Fund will
generally invest in two principal classifications of municipal securities:
general obligation securities and revenue securities. The Fund will also utilize
credit enhancers. The Fund also invests in money market instruments. If the
rating of a security is downgraded after purchase, the adviser will determine
whether it is in the best interest of the Fund's shareholders to continue to
hold the security.
CREDIT ENHANCER:
DEBT ISSUERS UTILIZE CREDIT ENHANCERS TO RAISE THE CREDIT RATING OF THEIR
OFFERING,
                                THEREBY LOWER THEIR INTEREST COSTS. A
                                MUNICIPALITY MAY HAVE THEIR BOND INSURED BY A
                                LARGE INSURANCE COMPANY, THEREBY RAISING THE
                                BOND'S CREDIT RATING TO AAA. A CORPORATE BOND
                                ISSUER MAY ARRANGE FOR A BANK LETTER OF CREDIT
                                TO BACK ITS ISSUE, RAISING ITS RATING TO AAA.
GENERAL OBLIGATION SECURITIES AND REVENUE SECURITIES:

GENERAL OBLIGATION SECURITIES ARE MUNICIPAL SECURITIES BACKED BY THE FULL FAITH
AND CREDIT AND TAXING POWER OF A MUNICIPALITY FOR THE PAYMENT OF THEIR PRINCIPAL
AND INTEREST. IN CONTRAST, REVENUE SECURITIES ARE MUNICIPAL SECURITIES ISSUED TO
FINANCE PUBLIC WORKS AND PAYABLE ONLY FROM THE REVENUES DERIVED FROM THE PROJECT
BEING FINANCED.

(APPLE LOGO)

                                (APPLE LOGO)
<PAGE>   59

Intermediate Tax-Free Bond Fund (continued)

    PROSPECTUS

                                       22
FUND SUMMARIES

                                The Fund will maintain a dollar-weighted average
                                portfolio maturity between three to ten years.
                                The average portfolio maturity will fluctuate
                                depending on the outlook for interest rate
                                changes. The ability to change the average
                                portfolio maturity allows the Fund to meet its
                                objective of providing high current income with
                                preservation of capital.

                                In managing the portfolio, the manager uses a
                                "top down" investment management approach
                                focusing on actual or anticipated changes or
                                trends in interest rates, the financial markets,
                                or the economy.

                                In addition to the securities described above,
                                the Fund may invest in other debt securities.

                                The Fund may, from time to time, take temporary
                                defensive positions that are inconsistent with
                                the Fund's principal investment strategies in
                                attempting to respond to adverse market,
                                economic, political, or other conditions. In
                                these and in other cases, the Fund may not
                                achieve its investment goal.

INTEREST RATES:
ONE OF THE MOST SIGNIFICANT FACTORS AFFECTING THE PERFORMANCE OF A BOND FUND IS
                                THE RISE AND FALL OF INTEREST RATES. WHEN
                                INTEREST RATES RISE, A BOND'S VALUE GENERALLY
                                DECLINES.

BOND MATURITIES:
A BOND IS ISSUED WITH A SPECIFIC MATURITY DATE -- THE DATE WHEN THE BOND'S
ISSUER, OR SELLER, MUST PAY BACK THE BOND'S INITIAL VALUE. BOND MATURITIES
GENERALLY RANGE FROM LESS THAN ONE YEAR (SHORT-TERM) TO 30 YEARS (LONG-TERM).
THE LONGER A BOND'S MATURITY, THE MORE RISK YOU, AS A BOND INVESTOR, FACE AS
INTEREST RATES RISE. LONG-TERM BONDS ARE MORE SUITABLE FOR INVESTORS WILLING TO
TAKE GREATER RISKS; SHORT-TERM BOND INVESTORS SHOULD BE WILLING TO ACCEPT LOWER
YIELDS IN RETURN FOR LESS FLUCTUATION IN THE VALUE OF THEIR INVESTMENT.

(APPLE LOGO)

                                (APPLE LOGO)
<PAGE>   60

Intermediate Tax-Free Bond Fund (continued)

    PROSPECTUS

                                       23

                                WHAT ARE THE MAIN RISKS OF INVESTING IN THIS
                                FUND?

                                Loss of money is a risk of investing in the
                                Fund. In addition, your investment in the Fund
                                may be subject to the following principal risks:

                                - CREDIT ENHANCEMENT RISK -- Credit enhancement
                                  risk involves the possibility that a "credit
                                  enhancer," such as a letter of credit,
                                  declines in quality and therefore leads to a
                                  decrease in the value of the Fund's
                                  investments.

                                - CREDIT RISK -- Credit risk is the possibility
                                  that an issuer cannot make timely interest and
                                  principal payments on its debt obligations,
                                  such as bonds. In general, lower-rated bonds
                                  have higher credit risks. However, because the
                                  Fund invests in investment grade debt
                                  obligations, credit risk is minimized.

                                - INTEREST RATE RISK -- Interest rate risk
                                  involves the possibility that the value of the
                                  Fund's investments will decline due to an
                                  increase in interest rates. In general, the
                                  longer a security's maturity, the greater the
                                  interest rate risk.

                                For more information about these risks please
                                refer to the section titled "Investment
                                Practices and Risks."

                                AN INVESTMENT IN THE FUND IS NOT A DEPOSIT OR AN
                                OBLIGATION OF BANK OF OKLAHOMA, N.A., ITS
                                AFFILIATES, OR ANY BANK, AND IS NOT INSURED OR
                                GUARANTEED BY THE FEDERAL DEPOSIT INSURANCE
                                CORPORATION OR ANY OTHER GOVERNMENT AGENCY.
<PAGE>   61

Intermediate Tax-Free Bond Fund (continued)

    PROSPECTUS

                                       24
FUND SUMMARIES

                                PERFORMANCE INFORMATION

                                The bar chart and the performance table below
                                illustrate the risks and volatility of an
                                investment in the Fund. Of course, the Fund's
                                past performance does not necessarily indicate
                                how the Fund will perform in the future.

                                This bar chart shows changes in the Fund's
                                performance from year to year.*

                                 ANNUAL TOTAL RETURNS (PERIODS ENDED 12/31)

<TABLE>
<S>                                                           <C>
1993                                                                             11.79
1994                                                                             -3.51
1995                                                                             13.71
1996                                                                              3.72
1997                                                                              7.27
1998                                                                              5.46
1999                                                                             -1.87
</TABLE>


                                * The performance information shown above is
                                  based on a calendar year. The Fund's total
                                  return from 1/1/00 to 9/30/00 was 5.79%. Sales
                                  charges are not reflected in the bar chart
                                  and, if they were reflected, returns would be
                                  less than those shown.


<TABLE>
                               <S>                       <C>       <C>
                               Best Quarter:              Q1  1995    5.92%
                               Worst Quarter:            Q1  1994    -3.81%
</TABLE>

                                This table compares the Fund's average annual
                                total returns for periods ending December 31,
                                1999 to those of the Lehman Brothers Municipal
                                Bond Index.
                                 AVERAGE ANNUAL TOTAL RETURNS
                                 (PERIODS ENDED 12/31/99)

<TABLE>
<CAPTION>
                                                                                Since
                                                                              Inception
                                                       1 Year      5 Years    (5/29/92)
                               --------------------------------------------------------
                               <S>                    <C>         <C>         <C>
                               Intermediate Tax-       -4.48%       4.90%       4.99%
                                 Free Bond Fund
                                 (reflects maximum
                                 sales charge of
                                 3.00%)
                               --------------------------------------------------------
                               Lehman Brothers         -2.07%       6.92%       6.22%
                                 Municipal Bond
                                 Index(1)
                               --------------------------------------------------------
</TABLE>

                                (1) The Lehman Brothers Municipal Bond Index is
                                    an unmanaged index considered to be
                                    representative of the municipal bond market
                                    as a whole.
<PAGE>   62

Intermediate Tax-Free Bond Fund (continued)

    PROSPECTUS

                                       25

FEES AND EXPENSES
---------------------------------------------------
Shareholder Fees
This table describes the shareholder fees that
you pay if you purchase or sell Fund shares. You
would pay these fees directly from your
investment in the Fund.
Maximum Sales Charge (Load) Imposed on Purchases
(as a percentage of offering price)       3.00%*
Maximum Deferred Sales Charge (Load)        0%**
(as a percentage of net asset value)

------------------------------------------------
*  The sales charges imposed on purchases of
   shares decreases as the purchase amount
   increases. In addition, a sales charge is not
   imposed on purchases of shares by certain
   investors. Please refer to the section titled
   "Your Account -- How Sales Charges are
   Calculated."

** A contingent deferred sales charge of 0.75%
   will be assessed against the proceeds of any
   redemption request relating to shares
   purchased without a sales charge in reliance
   upon the waiver accorded to purchases in the
   amount of $1 million or more, if the
   redemption request is made within one year of
   the purchase date. Please refer to the
   section titled "Your Account -- How Sales
   Charges are Calculated."

------------------------------------------------
Annual Fund Operating Expenses
This table describes the Fund's expenses that
you pay indirectly if you hold Fund shares.
Investment Advisory Fees                  0.55%+
Distribution/Service (12b-1) Fees         0.25%+

Other Expenses                             0.42%


TOTAL ANNUAL FUND OPERATING EXPENSES      1.22%+


------------------------------------------------
+ During the last fiscal year, the Adviser
  waived 0.20% of its Investment Advisory Fees
  and the Distributor waived 0.25% of its
  Distribution/Service (12b-1) Fees. These fee
  waivers are expected to continue through
  December 31, 2001. Accordingly, actual annual
  fund operating expenses were as follows:
      Investment Advisory Fees             0.35%
      Distribution/Service (12b-1) Fees    0.00%

      Other Expenses                       0.42%


      TOTAL ANNUAL FUND OPERATING
      EXPENSES                             0.77%


------------------------------------------------
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. The Example also
assumes that each year your investment has a 5%
return and Fund expenses remain the same.
Although your actual costs and returns may be
different, your approximate costs of investing
$10,000 in the Fund would be:


<TABLE>
<CAPTION>
   1 Year        3 Years        5 Years        10 Years
---------------------------------------------------------
<S>            <C>            <C>            <C>
    $421           $676           $950          $1,733
</TABLE>


ADDITIONAL
INFORMATION
DIVIDENDS
AND CAPITAL GAINS
Dividends are paid monthly; capital gains, if any, are paid annually.

INVESTMENT ADVISER
Bank of Oklahoma, N.A.
Tulsa, OK

INCEPTION DATE
May 29, 1992

NET ASSETS AS OF
NOVEMBER 30, 2000

$27 million


SUITABLE FOR IRAS
No

MINIMUM INITIAL
INVESTMENT
$1,000

NEWSPAPER
ABBREVIATION
Am Perform IntmTxF

AMERICAN PERFORMANCE
FUND NUMBER
003

CUSIP NUMBER
028846509

TICKER SYMBOL
APTFX
<PAGE>   63

    PROSPECTUS

                                       26
FUND SUMMARIES

                                Short-Term Income Fund
                                ------------------------------------------------

                                INVESTMENT GOAL

                                Total return by investing in U.S. government and
                                investment grade corporate debt securities and
                                mortgage related securities.

                                PRINCIPAL INVESTMENT STRATEGY


                                The Short-Term Income Fund seeks to maximize
                                total return by investing primarily in an
                                actively managed, diversified portfolio of
                                short-term bonds and other fixed income
                                securities. To pursue this goal, the Fund
                                normally invests at least 65% of its assets in
                                interest-bearing bonds. The Fund invests
                                primarily in investment grade or comparable
                                quality debt obligations such as bonds, notes
                                and debentures, and bills issued by U.S.
                                corporations or by the U.S. government, its
                                agencies, or instrumentalities, municipal
                                securities, and derivatives including
                                mortgage-related securities and asset-backed
                                securities. The Fund invests in debt obligations
                                only if they carry a rating within the three
                                highest rating categories assigned by a
                                nationally recognized statistical ratings
                                organization (e.g., at least "A" from Moody's or
                                Standard & Poor's). The Fund also invests in
                                money market instruments. If the rating of a
                                security is downgraded after purchase, the
                                Adviser will determine whether it is in the best
                                interest of the Fund's shareholders to continue
                                to hold the security. The Fund will seek to
                                increase the value of your investment through a
                                combination of income and capital gains.


CREDIT QUALITY: A BOND'S CREDIT QUALITY DEPENDS ON THE ISSUER'S ABILITY TO PAY
INTEREST ON THE BOND AND TO REPAY THE DEBT. BONDS ISSUED OR BACKED BY THE U.S.
GOVERNMENT OFFER MAXIMUM CREDIT PROTECTION; BONDS ISSUED OR BACKED BY FOREIGN
GOVERNMENTS CAN CARRY CONSIDERABLY MORE RISK. THE LOWER THE BOND'S CREDIT RATING
BY A RATING AGENCY (FOR EXAMPLE, MOODY'S OR STANDARD & POOR'S), THE GREATER THE
CHANCE THAT THE BOND ISSUER WILL DEFAULT, OR FAIL TO MEET ITS PAYMENT
OBLIGATIONS. BONDS RATED IN ONE OF THE FOUR HIGHEST RATING CATEGORIES ARE
CONSIDERED "INVESTMENT GRADE."

(APPLE LOGO)
<PAGE>   64

    PROSPECTUS

                                       27

Short-Term Income Fund (continued)
                                The Fund will maintain a dollar-weighted average
                                portfolio maturity of three years or less. The
                                average portfolio maturity will fluctuate
                                depending on the outlook for interest rate
                                changes. The ability to change the average
                                portfolio maturity allows the Fund to meet its
                                objective of maximizing total return.

                                In managing the portfolio, the manager uses a
                                "top down" investment management approach
                                focusing on actual or anticipated changes or
                                trends in interest rates, the financial markets,
                                or the economy.

                                In addition to the securities described above,
                                the Fund may invest in other debt securities.

                                The Fund may from time to time, take temporary
                                defensive positions that are inconsistent with
                                the Fund's principal investment strategies in
                                attempting to respond to adverse market,
                                economic, political, or other conditions. In
                                these and in other cases, the Fund may not
                                achieve its investment goal.

INTEREST RATES: ONE OF THE MOST SIGNIFICANT FACTORS AFFECTING THE PERFORMANCE OF
A BOND FUND IS THE RISE AND FALL OF INTEREST RATES. WHEN INTEREST RATES RISE, A
BOND'S VALUE GENERALLY DECLINES.
BOND

MATURITIES: A BOND IS ISSUED WITH A SPECIFIC MATURITY DATE -- THE DATE WHEN THE
BOND'S ISSUER, OR SELLER, MUST PAY BACK THE BOND'S INITIAL VALUE. BOND
MATURITIES GENERALLY RANGE FROM LESS THAN ONE YEAR (SHORT-TERM) TO 30 YEARS
(LONG-TERM). THE LONGER A BOND'S MATURITY, THE MORE RISK YOU, AS A BOND
INVESTOR, FACE AS INTEREST RATES RISE. LONG-TERM BONDS ARE MORE SUITABLE FOR
INVESTORS WILLING TO TAKE GREATER RISKS; SHORT-TERM BOND INVESTORS SHOULD BE
WILLING TO ACCEPT LOWER YIELDS IN RETURN FOR LESS FLUCTUATION IN THE VALUE OF
THEIR INVESTMENT.

(APPLE LOGO)

                                (APPLE LOGO)
<PAGE>   65

    PROSPECTUS

                                       28
FUND SUMMARIES

Short-Term Income Fund (continued)

                                WHAT ARE THE MAIN RISKS OF INVESTING IN THIS
                                FUND?

                                Loss of money is a risk of investing in the
                                Fund. In addition, your investment in the Fund
                                may be subject to the following principal risks:

                                - CREDIT RISK -- Credit risk is the possibility
                                  that an issuer cannot make timely interest and
                                  principal payments on its debt obligations,
                                  such as bonds. In general, lower-rated bonds
                                  have higher credit risks. However, because the
                                  Fund invests in investment grade debt
                                  obligations, credit risk is minimized.

                                - INTEREST RATE RISK -- Interest rate risk
                                  involves the possibility that the value of the
                                  Fund's investments will decline due to an
                                  increase in interest rates. In general, the
                                  longer a security's maturity, the greater the
                                  interest rate risk.

                                - PREPAYMENT/CALL RISK -- Prepayment risk is the
                                  chance that the repayment of a mortgage will
                                  occur sooner than expected. Call risk is the
                                  possibility that during periods of falling
                                  interest rates, a bond issuer will
                                  "call" -- or repay -- its high-yielding bond
                                  before the bond's maturity date. In each case,
                                  the Fund may be forced to reinvest in
                                  securities with a lower yield. Changes in
                                  prepayment/call rates can result in greater
                                  price and yield volatility.

                                For more information about these risks please
                                refer to the section titled "Investment
                                Practices and Risks."

                                AN INVESTMENT IN THE FUND IS NOT A DEPOSIT OR AN
                                OBLIGATION OF BANK OF OKLAHOMA, N.A., ITS
                                AFFILIATES, OR ANY BANK, AND IS NOT INSURED OR
                                GUARANTEED BY THE FEDERAL DEPOSIT INSURANCE
                                CORPORATION OR ANY OTHER GOVERNMENT AGENCY.
<PAGE>   66

Short-Term Income Fund (continued)

    PROSPECTUS

                                       29

                                PERFORMANCE INFORMATION

                                The bar chart and the performance table below
                                illustrate the risks and volatility of an
                                investment in the Fund. Of course, the Fund's
                                past performance does not necessarily indicate
                                how the Fund will perform in the future.

                                This bar chart shows changes in the Fund's
                                performance from year to year.*
                                ANNUAL TOTAL RETURNS (PERIODS ENDED 12/31)

<TABLE>
<S>                                                           <C>
1995                                                                             8.49
1996                                                                             4.35
1997                                                                             7.82
1998                                                                             7.36
1999                                                                             3.54
</TABLE>


                                * The performance information shown above is
                                  based on a calendar year. The Fund's total
                                  return from 1/1/00 to 9/30/00 was 5.87%. Sales
                                  charges are not reflected in the bar chart
                                  and, if they were reflected, returns would be
                                  less than those shown.


<TABLE>
                               <S>                   <C>   <C>       <C>
                               Best Quarter:          Q4     1995     2.72%
                               Worst Quarter:         Q1     1996    -0.04%
</TABLE>


                                This table compares the Fund's average annual
                                total returns for periods ending December 31,
                                1999 to those of the Merrill Lynch U.S.
                                Government/Corporate 1-5 Year Bond Index.

                                AVERAGE ANNUAL TOTAL RETURN
                                (PERIODS ENDED 12/31/99)

<TABLE>
<CAPTION>
                                                                                 Since
                                                                               Inception
                                                        1 Year      5 Years    (10/19/94)
                               ----------------------------------------------------------
                               <S>                     <C>         <C>         <C>
                               Short-Term Income Fund
                                 (reflects a maximum
                                 sales charge of
                                 2.00%)                  1.43%       5.87%       5.61%
                               ----------------------------------------------------------
                               Merrill Lynch U.S.
                                 Government/Corporate
                                 1-5 Year Bond
                                 Index(1)                2.19%       6.58%       6.86%
                               ----------------------------------------------------------
</TABLE>

                                (1) The Merrill Lynch U.S. Government/Corporate
                                    1-5 Year Bond Index is an unmanaged index
                                    comprised of investment grade government and
                                    corporate debt securities with maturities
                                    between 1 and 5 years.
<PAGE>   67

Short-Term Income Fund (continued)

    PROSPECTUS

                                       30
FUND SUMMARIES

FEES AND EXPENSES
---------------------------------------------------
Shareholder Fees
This table describes the shareholder fees that
you pay if you purchase or sell Fund shares. You
would pay these fees directly from your
investment in the Fund.
Maximum Sales Charge (Load) Imposed on Purchases
(as a percentage of offering price)       2.00%*
Maximum Deferred Sales Charge (Load)        0%**
(as a percentage of net asset value)
------------------------------------------------
*  The sales charges imposed on purchases of
   shares decreases as the purchase amount
   increases. In addition, a sales charge is not
   imposed on purchases of shares by certain
   investors. Please refer to the section titled
   "Your Account -- How Sales Charges are
   Calculated."

** A contingent deferred sales charge of 0.50%
   will be assessed against the proceeds of any
   redemption request relating to shares
   purchased without a sales charge in reliance
   upon the waiver accorded to purchases in the
   amount of $1 million or more, if the
   redemption request is made within one year of
   the purchase date. Please refer to the
   section titled "Your Account -- How Sales
   Charges are Calculated."

------------------------------------------------
Annual Fund Operating Expenses

This table describes the Fund's expenses that
you pay indirectly if you hold Fund shares.
Investment Advisory Fees                  0.55%+
Distribution/Service (12b-1) Fees         0.25%+

Other Expenses                             0.41%


TOTAL ANNUAL FUND OPERATING EXPENSES      1.21%+

------------------------------------------------

+  During the last fiscal year, the Adviser
   waived 0.55% of its Investment Advisory Fee,
   the Distributor waived 0.08% of its
   Distribution/Service (12b-1) Fees, and
   various parties reimbursed 0.01% of Other
   Expenses. These fee waivers and
   reimbursements are expected to continue
   through December 31, 2001. Accordingly,
   actual annual fund operating expenses were as
   follows:

   Investment Advisory Fees                0.00%
   Distribution/Service (12b-1) Fees       0.17%

   Other Expenses                          0.40%


   TOTAL ANNUAL FUND OPERATING EXPENSES    0.57%


------------------------------------------------
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. The Example also
assumes that each year your investment has a 5%
return and Fund expenses remain the same.
Although your actual costs and returns may be
different, your approximate costs of investing
$10,000 in the Fund would be:


<TABLE>
<CAPTION>
   1 Year        3 Years        5 Years        10 Years
---------------------------------------------------------
<S>            <C>            <C>            <C>
    $321           $576           $852          $1,637
</TABLE>


ADDITIONAL
INFORMATION

DIVIDENDS
AND CAPITAL GAINS
Dividends are paid monthly; capital gains, if any, are paid annually.

INVESTMENT ADVISER
Bank of Oklahoma, N.A.
Tulsa, OK

INCEPTION DATE
October 19, 1994

NET ASSETS AS OF
NOVEMBER 30, 2000

$62 million


SUITABLE FOR IRAS
Yes

MINIMUM INITIAL INVESTMENT
$1,000

NEWSPAPER ABBREVIATION
Am Perform ShTrInc

AMERICAN PERFORMANCE FUND NUMBER
008

CUSIP NUMBER
028846806

TICKER SYMBOL
APSTX
<PAGE>   68

    PROSPECTUS

                                       31

 EQUITY FUNDS

                                Equity Fund
                                ------------------------------------------------

                                INVESTMENT GOAL

                                Growth of capital and, secondarily, income by
                                investing in U.S. common stocks.

                                PRINCIPAL INVESTMENT STRATEGY

                                The Equity Fund seeks growth of capital and,
                                secondarily, income by investing primarily in a
                                diversified portfolio of common stocks and
                                securities convertible into common stocks.

                                To pursue this goal, the Fund invests primarily
                                in equity securities of U.S. companies with
                                weighted average market capitalization and
                                book-to-price ratios similar to those of the
                                Standard & Poor's 500/BARRA Value Index (S&P
                                500/BARRA Value Index). The S&P 500/BARRA Value
                                Index includes stocks based on only one
                                attribute -- the book-to-price ratio. However,
                                stocks included in the S&P 500/BARRA Value Index
                                and securities to be selected by the manager of
                                the Equity Fund also exhibit characteristics
                                associated with "value" stocks: lower
                                price-to-earnings ratios, higher dividend
                                yields, and lower historical and predicted
                                earnings growth.

                                The Fund attempts to identify stocks of
                                undervalued companies by employing a
                                quantitative investment approach whereby
                                individual stocks are ranked according to their
                                relative price strength, relative value,
                                earnings momentum, and earnings estimate
                                revisions. Additional criteria the manager uses
                                to select particular stocks include industry
                                weightings, volatility, momentum, size, trading
                                activity, growth, earnings yield, value,
                                earnings variability, leverage, currency
                                sensitivity, and dividend yield. Economic
                                conditions may warrant the consideration of
                                other factors when ranking individual stocks.

THE S&P 500/BARRA VALUE INDEX:


CONSISTS OF THOSE DOMESTIC STOCKS INCLUDED IN THE S&P 500 INDEX WHICH ADHERE TO
A VALUE INVESTMENT STYLE. AS OF THE DATE OF THIS PROSPECTUS, THE S&P 500/BARRA
VALUE INDEX STATISTICS WERE AS FOLLOWS: THE SMALLEST COMPANY HAD A MARKET
CAPITALIZATION OF $155 MILLION, THE LARGEST COMPANY A MARKET CAPITALIZATION OF
$307 BILLION, THE MEAN MARKET CAPITALIZATION WAS $15 BILLION, AND THE WEIGHTED
AVERAGE MARKET CAPITALIZATION WAS $72 BILLION.


RELATIVE PRICE STRENGTH:



THE PRICE CHANGE OF ANY STOCK VERSUS THE PRICE CHANGE OF THE WHOLE STOCK MARKET.


RELATIVE VALUE:



A DIVIDEND DISCOUNT MODEL, WHICH IS DERIVED FROM THE THEORY THAT A STOCK'S PRICE
IS EQUAL TO THE STREAM OF ITS FUTURE DIVIDENDS DISCOUNTED TO PRESENT VALUE.


(APPLE LOGO)

(APPLE LOGO)

(APPLE LOGO)
<PAGE>   69

    PROSPECTUS

                                       32
FUND SUMMARIES

Equity Fund (continued)
                                In managing the Fund's portfolio, the manager
                                attempts to match the risk characteristics of
                                the stocks comprising the S&P 500/BARRA Value
                                Index. The Fund does not seek to match the
                                performance of the S&P 500/BARRA Value Index,
                                nor does it limit its investments to stocks in
                                that index.

                                In addition to the securities described above,
                                the Fund may invest in money market instruments,
                                U.S. Treasury obligations, and other types of
                                equity and debt securities.

                                The Fund may, from time to time, take temporary
                                defensive positions that are inconsistent with
                                the Fund's principal investment strategies in
                                attempting to respond to adverse market,
                                economic, political, or other conditions. In
                                these and in other cases, the Fund may not
                                achieve its investment goal.

                                WHAT ARE THE MAIN RISKS OF INVESTING IN THIS
                                FUND?

                                Loss of money is a risk of investing in the
                                Fund. In addition, your investment in the Fund
                                may be subject to the following principal risks:

                                - INVESTMENT STYLE RISK -- Investment style risk
                                  is the possibility that returns from value
                                  stocks will trail returns from other asset
                                  classes or the overall stock market.

                                - MARKET RISK -- Market risk is the possibility
                                  that the Fund's investments in equity
                                  securities will decline because of drops in
                                  the stock market. Stock markets tend to move
                                  in cycles, with periods of either rising or
                                  falling prices. The value of your investment
                                  will go up or down in response to these
                                  movements.

                                The Fund may trade securities actively, which
                                could increase its transaction costs (thus
                                lowering performance) and may increase the
                                amount of taxes that you pay.
<PAGE>   70

Equity Fund (continued)

    PROSPECTUS

                                       33

                                For more information about these risks please
                                refer to the section titled "Investment
                                Practices and Risks."

                                AN INVESTMENT IN THE FUND IS NOT A DEPOSIT OR AN
                                OBLIGATION OF BANK OF OKLAHOMA, N.A., ITS
                                AFFILIATES, OR ANY BANK, AND IS NOT INSURED OR
                                GUARANTEED BY THE FEDERAL DEPOSIT INSURANCE
                                CORPORATION OR ANY OTHER GOVERNMENT AGENCY.

                                PERFORMANCE INFORMATION

                                The bar chart and the performance table below
                                illustrate the risks and volatility of an
                                investment in the Fund. Of course, the Fund's
                                past performance does not necessarily indicate
                                how the Fund will perform in the future.

                                This bar chart shows changes in the Fund's
                                performance from year to year.*
                                 ANNUAL TOTAL RETURNS (PERIODS ENDED 12/31)
                                [BAR GRAPH]

<TABLE>
<S>                                                           <C>
1991                                                                             26.13
1992                                                                             -3.47
1993                                                                             10.46
1994                                                                             -1.21
1995                                                                             35.26
1996                                                                             25.91
1997                                                                             28.77
1998                                                                             18.83
1999                                                                             12.44
</TABLE>


                                * The performance information shown above is
                                  based on a calendar year. The Fund's total
                                  return from 1/1/00 to 9/30/00 was -0.53%.
                                  Sales charges are not reflected in the bar
                                  chart and, if they were reflected, returns
                                  would be less than those shown.


<TABLE>
                               <S>             <C>    <C>     <C>
                               Best Quarter:   Q4     1998     18.88%
                               Worst Quarter:  Q3     1998    -12.79%
</TABLE>
<PAGE>   71

Equity Fund (continued)

    PROSPECTUS

                                       34
FUND SUMMARIES


                                This table compares the Fund's average annual
                                total returns for periods ending December 31,
                                1999 to those of the S&P 500 Index and the S&P
                                500/BARRA Value Index.

                                 AVERAGE ANNUAL TOTAL RETURNS
                                 (PERIODS ENDED 12/31/99)


<TABLE>
<CAPTION>
                                                                                Since
                                                                              Inception
                                                       1 Year      5 Years    (9/28/90)
                               --------------------------------------------------------
                               <S>                    <C>         <C>         <C>
                               Equity Fund
                                 (reflects maximum
                                 sales charge of
                                 5.00%)                  6.83%      22.72%      15.79%
                               --------------------------------------------------------
                               S&P 500 Index(1)         21.04%      28.55%      21.35%
                               --------------------------------------------------------
                               S&P 500/BARRA Value
                                 Index(2)               12.72%      22.94%      18.55%
                               --------------------------------------------------------
</TABLE>


                                (1) The S&P 500 Index is an unmanaged index
                                    generally representative of the performance
                                    of large companies in the U.S. stock market.


                                (2)The S&P 500/BARRA Value Index is an unmanaged
                                   index generally representative of the
                                   performance of large value companies in the
                                   U.S. stock market.

<PAGE>   72

Equity Fund (continued)

    PROSPECTUS

                                       35

FEES AND EXPENSES
---------------------------------------------------
Shareholder Fees
This table describes the shareholder fees that
you pay if you purchase or sell Fund shares. You
would pay these fees directly from your
investment in the Fund.
Maximum Sales Charge (Load) Imposed on Purchases
(as a percentage of offering price)       5.00%*
Maximum Deferred Sales Charge (Load)        0%**
(as a percentage of net asset value)
------------------------------------------------
*  The sales charges imposed on purchases of
   shares decreases as the purchase amount
   increases. In addition, a sales charge is not
   imposed on purchases of shares by certain
   investors. Please refer to the section titled
   "Your Account -- How Sales Charges are
   Calculated."

** A contingent deferred sales charge of 1.00%
   will be assessed against the proceeds of any
   redemption request relating to shares
   purchased without a sales charge in reliance
   upon the waiver accorded to purchases in the
   amount of $1 million or more, if the
   redemption request is made within one year of
   the purchase date. Please refer to the
   section titled "Your Account -- How Sales
   Charges are Calculated."
------------------------------------------------
Annual Fund Operating Expenses
This table describes the Fund's expenses that
you pay indirectly if you hold Fund shares.

Investment Advisory Fees                  0.69%+
Distribution/Service (12b-1) Fees          0.25%

Other Expenses                             0.32%


TOTAL ANNUAL FUND OPERATING EXPENSES      1.26%+

------------------------------------------------
+ During the last fiscal year, the Adviser
  waived 0.19% of its Investment Advisory Fees.
  This fee waiver is expected to continue
  through December 31, 2001. Accordingly, actual
  annual fund operating expenses were as
  follows:
   Investment Advisory Fees                0.50%
   Distribution/Service (12b-1) Fees       0.25%

   Other Expenses                          0.32%


   TOTAL ANNUAL FUND OPERATING EXPENSES    1.07%

------------------------------------------------

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. The Example also
assumes that each year your investment has a 5%
return and Fund expenses remain the same.
Although your actual costs and returns may be
different, your approximate costs of investing
$10,000 in the Fund would be:


<TABLE>
<CAPTION>
   1 Year        3 Years        5 Years        10 Years
---------------------------------------------------------
<S>            <C>            <C>            <C>
622.$....          $880          $1,157         $1,946
</TABLE>


ADDITIONAL
INFORMATION

DIVIDENDS
AND CAPITAL GAINS
Dividends are paid quarterly; capital gains, if any, are paid annually.

INVESTMENT ADVISER
Bank of Oklahoma, N.A.
Tulsa, OK

INCEPTION DATE
September 28, 1990

NET ASSETS AS OF
NOVEMBER 30, 2000

$131 million


SUITABLE FOR IRAS
Yes

MINIMUM INITIAL INVESTMENT
$1,000

NEWSPAPER ABBREVIATION
Am Perform Equity

AMERICAN PERFORMANCE FUND NUMBER
004

CUSIP NUMBER
028846608

TICKER SYMBOL
APEQX
<PAGE>   73

    PROSPECTUS

                                       36
FUND SUMMARIES

                                Balanced Fund
                                ------------------------------------------------

                                INVESTMENT GOAL

                                Capital appreciation and income by investing in
                                U.S. common stocks and investment grade bonds.

                                PRINCIPAL INVESTMENT STRATEGY
                                The Balanced Fund seeks capital appreciation and
                                income by investing primarily in a broadly
                                diversified portfolio of securities, including
                                common stocks, preferred stocks and bonds. To
                                pursue this goal, the Fund normally invests
                                between 50% and 75% of its total assets in
                                equity securities and at least 25% of its assets
                                in investment grade (rated, at the time of
                                purchase, in one of the three highest rating
                                categories) or comparable quality debt
                                obligations.
                                The equity portion of the Fund primarily
                                consists of large and small capitalization
                                stocks of both undervalued companies and
                                companies with above average growth potential.
                                In selecting equity securities, the Adviser
                                employs a quantitative investment approach
                                whereby individual stocks are ranked according
                                to their relative price strength, relative
                                value, earnings momentum, and earnings estimate
                                revisions. Economic conditions may warrant the
                                consideration of other factors when ranking
                                individual stocks.
                                The debt portion of the Fund primarily consists
                                of bonds, notes and debentures, and bills issued
                                by U.S. corporations or the U.S. government, its
                                agencies, or instrumentalities, mortgage-related
                                securities, and asset-backed securities. The
                                Fund seeks to maintain a dollar-weighted average
                                portfolio maturity of seven to twelve years for
                                the debt portion of its portfolio. The Fund also
                                invests in money market instruments. If the
                                rating of a security is downgraded after
                                purchase, the Adviser will determine whether it
                                is in the best interest of the Fund's
                                shareholders to continue to hold the security.

BALANCED FUNDS: ARE GENERALLY "MIDDLE-OF-THE-ROAD" INVESTMENTS THAT SEEK TO
PROVIDE SOME COMBINATION OF GROWTH, INCOME, AND CONSERVATION OF CAPITAL BY
INVESTING IN A MIX OF STOCKS, BONDS, AND/OR MONEY MARKET INSTRUMENTS. BECAUSE
THE PRICES OF STOCKS AND BONDS OFTEN MOVE IN DIFFERENT DIRECTIONS, BALANCED
FUNDS ARE ABLE TO USE REWARDS FROM ONE TYPE OF INVESTMENT TO HELP OFFSET THE
RISKS FROM ANOTHER.

RELATIVE PRICE STRENGTH:



THE PRICE CHANGE OF ANY STOCK VERSUS THE PRICE CHANGE OF THE WHOLE STOCK MARKET.


RELATIVE VALUE:



A DIVIDEND DISCOUNT MODEL, WHICH IS DERIVED FROM THE
THEORY THAT A STOCK'S PRICE IS EQUAL TO THE STREAM OF ITS FUTURE DIVIDENDS
DISCOUNTED TO PRESENT VALUE.


(APPLE LOGO)

(APPLE LOGO)

(APPLE LOGO)
<PAGE>   74

    PROSPECTUS

                                       37

Balanced Fund (continued)

                                The portion of the Fund's assets invested in
                                equity and debt securities will vary in
                                accordance with economic conditions, the level
                                of stock prices, interest rates, and the risk
                                associated with each investment medium.

                                In addition to the securities described above,
                                the Fund may invest in other equity and debt
                                securities. The Fund may from time to time, take
                                temporary defensive positions that are
                                inconsistent with the Fund's principal
                                investment strategies in attempting to respond
                                to adverse market, economic, political, or other
                                conditions. In these and in other cases, the
                                Fund may not achieve its investment goal.

                                WHAT ARE THE MAIN RISKS OF INVESTING IN THIS
                                FUND?

                                Loss of money is a risk of investing in the
                                Fund. In addition, your investment in the Fund
                                may be subject to the following principal risks:

                                - CREDIT RISK -- Credit risk is the possibility
                                  that an issuer cannot make timely interest and
                                  principal payments on its debt obligations,
                                  such as bonds. In general, lower-rated bonds
                                  have higher credit risks. However, because the
                                  Fund invests in investment grade debt
                                  obligations, credit risk is minimized.

                                - INTEREST RATE RISK -- Interest rate risk
                                  involves the possibility that the value of the
                                  Fund's investments will decline due to an
                                  increase in interest rates. Generally, an
                                  increase in the average maturity of the fixed
                                  income portion of the Fund will make it more
                                  sensitive to interest rate risk.

                                - MARKET RISK -- Market risk is the possibility
                                  that the Fund's investments in equity
                                  securities will decline because of drops in
                                  the stock market. Stock markets tend to move
                                  in cycles, with periods of either rising or
                                  falling prices. The value of your investment
                                  will go up or down in response to these
                                  movements.
<PAGE>   75

Balanced Fund (continued)

    PROSPECTUS

                                       38
FUND SUMMARIES

                                - PORTFOLIO BALANCING RISK -- Portfolio
                                  balancing risk is the possibility that the
                                  portfolio manager will not accurately assess
                                  the optimal mix of stocks and debt securities
                                  and therefore will underperform other balanced
                                  funds.

                                To the extent that the Fund makes investments
                                with additional risks, those risks could
                                increase volatility or reduce performance. The
                                Fund may trade securities actively, which could
                                increase its transaction costs (thus lowering
                                performance) and may increase the amount of
                                taxes that you pay.

                                For more information about these risks please
                                refer to the section titled "Investment
                                Practices and Risks."

                                AN INVESTMENT IN THE FUND IS NOT A DEPOSIT OR AN
                                OBLIGATION OF BANK OF OKLAHOMA, N.A., ITS
                                AFFILIATES, OR ANY BANK, AND IS NOT INSURED OR
                                GUARANTEED BY THE FEDERAL DEPOSIT INSURANCE
                                CORPORATION OR ANY OTHER GOVERNMENT AGENCY.

                                PERFORMANCE INFORMATION

                                The bar chart and the performance table below
                                illustrate the risks and volatility of an
                                investment in the Fund. Of course, the Fund's
                                past performance does not necessarily indicate
                                how the Fund will perform in the future.
<PAGE>   76

Balanced Fund (continued)

    PROSPECTUS

                                       39

                                This bar chart shows changes in the Fund's
                                performance from year to year.*
                                 ANNUAL TOTAL RETURNS (PERIODS ENDED 12/31)
                                [BAR GRAPH]

<TABLE>
<S>                                                           <C>
1996                                                                             16.38
1997                                                                             19.46
1998                                                                             17.36
1999                                                                              9.26
</TABLE>


                                * The performance information shown above is
                                  based on a calendar year. The Fund's total
                                  return from 1/1/00 to 9/30/00 was 0.51%. Sales
                                  charges are not reflected in the bar chart
                                  and, if they were reflected, returns would be
                                  less than those shown.


<TABLE>
                               <S>             <C>    <C>     <C>
                               Best Quarter     Q2    1997    13.01%
                               Worst Quarter    Q3    1998    -5.40%
</TABLE>

                                This table compares the Fund's average annual
                                total returns for periods ending December 31,
                                1999 to those of the S&P 500 Index and the
                                Salomon Brothers Broad (Investment Grade) Bond
                                Index.
                                 AVERAGE ANNUAL TOTAL RETURNS
                                 (PERIODS ENDED 12/31/99)

<TABLE>
<CAPTION>
                                                                          Since
                                                                        Inception
                                                               1 Year   (6/1/95)
                               --------------------------------------------------
                               <S>                             <C>      <C>
                               Balanced Fund (reflects
                                 maximum sales charge of
                                 5.00%)                         3.77%    15.07%
                               --------------------------------------------------
                               S&P 500 Index(1)                21.04%    27.00%
                               --------------------------------------------------
                               Salomon Brothers Broad
                                 (Investment Grade) Bond
                                 Index(2)                      -0.83%     6.09%
                               --------------------------------------------------
</TABLE>

                                (1) The S&P 500 Index is an unmanaged index
                                    generally representative of the performance
                                    of large companies in the U.S. stock market.
                                (2) The Salomon Brothers Broad (Investment
                                    Grade) Bond Index is an unmanaged index
                                    comprised of investment-grade corporate and
                                    U.S. government bonds.
<PAGE>   77

Balanced Fund (continued)

    PROSPECTUS

                                       40
FUND SUMMARIES

FEES AND EXPENSES

------------------------------------------------
Shareholder Fees
This table describes the shareholder fees that
you pay if you purchase or sell Fund shares. You
would pay these fees directly from your
investment in the Fund.
Maximum Sales Charge (Load) Imposed on Purchases
(as a percentage of offering price)       5.00%*
Maximum Deferred Sales Charge (Load)        0%**
(as a percentage of net asset value)
------------------------------------------------
*  The sales charges imposed on purchases of
   shares decreases as the purchase amount
   increases. In addition, a sales charge is not
   imposed on purchases of shares by certain
   investors. Please refer to the section titled
   "Your Account -- How Sales Charges are
   Calculated."

** A contingent deferred sales charge of 1.00%
   will be assessed against the proceeds of any
   redemption request relating to shares
   purchased without a sales charge in reliance
   upon the waiver accorded to purchases in the
   amount of $1 million or more, if the
   redemption request is made within one year of
   the purchase date. Please refer to the
   section titled "Your Account -- How Sales
   Charges are Calculated."
------------------------------------------------
Annual Fund Operating Expenses
This table describes the Fund's expenses that
you pay indirectly if you hold Fund shares.

Investment Advisory Fees                  0.74%+
Distribution/Service (12b-1) Fees         0.25%+
Other Expenses                             0.36%
TOTAL ANNUAL FUND OPERATING EXPENSES      1.35%+
------------------------------------------------

+ During the last fiscal year, the Adviser
  waived 0.32% of its Investment Advisory Fees,
  the Distributor waived 0.25% of its
  Distribution/Service (12b-1) Fees, and various
  parties reimbursed 0.02% of Other Expenses.
  These fee waivers and reimbursements are
  expected to continue through December 31,
  2001. Accordingly, actual annual fund
  operating expenses were as follows:

   Investment Advisory Fees                0.42%
   Distribution/Service (12b-1) Fees       0.00%

   Other Expenses                          0.34%


   TOTAL ANNUAL FUND OPERATING EXPENSES    0.76%

------------------------------------------------
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. The Example also
assumes that each year your investment has a 5%
return and Fund expenses remain the same.
Although your actual costs and returns may be
different, your approximate costs of investing
$10,000 in the Fund would be:

<TABLE>
<CAPTION>
   1 Year        3 Years        5 Years        10 Years
---------------------------------------------------------
<S>            <C>            <C>            <C>
631.$....          $906          $1,202         $2,043
</TABLE>

                                                          ADDITIONAL
                                                          INFORMATION

                                                          DIVIDENDS
                                                          AND CAPITAL GAINS
                                                          Dividends are paid
                                                          quarterly; capital
                                                          gains, if any, are
                                                          paid annually.

                                                          INVESTMENT ADVISER
                                                          Bank of Oklahoma,
                                                          N.A.
                                                          Tulsa, OK

                                                          INCEPTION DATE
                                                          June 1, 1995

                                                          NET ASSETS AS OF
                                                          NOVEMBER 30, 2000

                                                          $6 million


                                                          SUITABLE FOR IRAS
                                                          Yes

                                                          MINIMUM INITIAL
                                                          INVESTMENT
                                                          $1,000

                                                          NEWSPAPER
                                                          ABBREVIATION
                                                          Am Perform Balan

                                                          AMERICAN PERFORMANCE
                                                          FUND NUMBER
                                                          009

                                                          CUSIP NUMBER
                                                          028846889

                                                          TICKER SYMBOL
                                                          APBAX
<PAGE>   78

    PROSPECTUS

                                       41

                                Growth Equity Fund
                                ------------------------------------------------

                                INVESTMENT GOAL

                                Long-term capital appreciation by investing in
                                U.S. common stocks.

                                PRINCIPAL INVESTMENT STRATEGY

                                The Growth Equity Fund seeks long-term capital
                                appreciation by investing primarily in a
                                diversified portfolio of common stocks and
                                securities convertible into common stocks.

                                To pursue this goal, the Fund invests primarily
                                in a universe of equity securities of large U.S.
                                companies above a given market capitalization,
                                currently $1 billion, with a weighted average
                                market value similar to that of the S&P
                                500/BARRA Growth Index, which exhibit growth
                                characteristics.
                                The Fund attempts to identify large
                                capitalization stocks with above-average growth
                                potential by employing a quantitative investment
                                approach whereby individual stocks are ranked
                                according to their relative price strength,
                                relative value, earnings momentum, earnings
                                estimate revisions, return on equity, past
                                growth, earnings per share and sales per share,
                                and future estimated earnings per share growth.
                                Economic conditions may warrant the
                                consideration of other factors when ranking
                                individual stocks. The Fund will exhibit
                                volatility similar to the S&P 500/BARRA Growth
                                Index and slightly higher than the S&P 500
                                Index.

GROWTH FUNDS:
GROWTH INVESTING FOCUSES ON COMPANIES BELIEVED TO HAVE ABOVE-AVERAGE POTENTIAL
FOR GROWTH IN REVENUE AND EARNINGS. REFLECTING THE MARKET'S HIGH EXPECTATIONS
FOR SUPERIOR GROWTH, THE PRICES OF SUCH STOCKS ARE TYPICALLY ABOVE-AVERAGE IN
RELATION TO SUCH MEASURES AS REVENUE, EARNINGS, BOOK VALUE, AND DIVIDENDS.


THE S&P 500/BARRA GROWTH INDEX:
CONSISTS OF THOSE DOMESTIC STOCKS INCLUDED IN THE S&P 500 INDEX WHICH ADHERE TO
A GROWTH INVESTMENT STYLE. AS OF THE DATE OF THIS PROSPECTUS, THE S&P 500/BARRA
GROWTH INDEX STATISTICS WERE AS FOLLOWS: THE SMALLEST COMPANY HAD A MARKET
CAPITALIZATION OF $1 BILLION, THE LARGEST COMPANY A MARKET CAPITALIZATION OF
$491 BILLION, THE MEAN MARKET CAPITALIZATION WAS $51 BILLION, AND THE WEIGHTED
AVERAGE MARKET CAPITALIZATION WAS $173 BILLION.


RELATIVE PRICE STRENGTH:



THE PRICE CHANGE OF ANY STOCK VERSUS THE PRICE CHANGE OF THE WHOLE STOCK MARKET.


RELATIVE VALUE:



A DIVIDEND DISCOUNT MODEL, WHICH IS DERIVED FROM THE THEORY THAT A STOCK'S PRICE
IS EQUAL TO THE STREAM OF ITS FUTURE DIVIDENDS DISCOUNTED TO PRESENT VALUE.


(APPLE LOGO)

(APPLE LOGO)

(APPLE LOGO)

(APPLE LOGO)
<PAGE>   79

    PROSPECTUS

                                       42
FUND SUMMARIES

Growth Equity Fund (continued)
                                In addition to the securities described above,
                                the fund may invest in money market instruments,
                                U.S. Treasury obligations and other types of
                                equity and debt securities.

                                The Fund may, from time to time, take temporary
                                defensive positions that are inconsistent with
                                the Fund's principal investment strategies, in
                                attempting to respond to adverse market,
                                economic, political, or other conditions. In
                                these and in other cases, the Fund may not
                                achieve its investment goal.

                                WHAT ARE THE MAIN RISKS OF INVESTING IN THIS
                                FUND?

                                Loss of money is a risk of investing in the
                                Fund. In addition, your investment in the Fund
                                may be subject to the following principal risks:

                                - INVESTMENT STYLE RISK -- Investment style risk
                                  is the possibility that returns from large
                                  capitalization growth stocks will trail
                                  returns from other asset classes or the
                                  overall stock market.

                                - MARKET RISK -- Market risk is the possibility
                                  that the Fund's investments in equity
                                  securities will decline because of drops in
                                  the stock market. Stock markets tend to move
                                  in cycles, with periods of either rising or
                                  falling prices. The value of your investment
                                  will go up or down in response to these
                                  movements.

                                The Fund may trade securities actively, which
                                could increase its transaction costs (thus
                                lowering performance) and may increase the
                                amount of taxes that you pay.

                                For more information about these risks please
                                refer to the section titled "Investment
                                Practices and Risks."

                                AN INVESTMENT IN THE FUND IS NOT A DEPOSIT OR AN
                                OBLIGATION OF BANK OF OKLAHOMA, N.A., ITS
                                AFFILIATES, OR ANY BANK, AND IS NOT INSURED OR
                                GUARANTEED BY THE FEDERAL DEPOSIT INSURANCE
                                CORPORATION OR ANY OTHER GOVERNMENT AGENCY.
<PAGE>   80

Growth Equity Fund (continued)

    PROSPECTUS

                                       43

                                PERFORMANCE INFORMATION

                                The bar chart and the performance table below
                                give some indication of the risks and volatility
                                of an investment in the Fund. Of course, the
                                Fund's past performance does not necessarily
                                indicate how the Fund will perform in the
                                future.

                                This bar chart shows changes in the Fund's
                                performance from year to year.*+
                                 ANNUAL TOTAL RETURNS (PERIODS ENDED 12/31)

<TABLE>
<S>                                                           <C>
1995                                                                             35.99
1996                                                                             24.41
1997                                                                             32.88
1998                                                                             42.25
1999                                                                             27.71
</TABLE>


                                * The performance information shown above is
                                  based on a calendar year. The Fund's total
                                  return from 1/1/00 to 9/30/00 was -8.17%.
                                  Sales charges are not reflected in the bar
                                  chart and, if they were reflected, returns
                                  would be less than those shown.


<TABLE>
                               <S>             <C>    <C>     <C>
                               Best Quarter:    Q4    1998    23.55%
                               Worst Quarter:   Q3    1998    -7.56%
</TABLE>
<PAGE>   81

Growth Equity Fund (continued)

    PROSPECTUS

                                       44
FUND SUMMARIES

                                This table compares the Fund's average annual
                                total returns for periods ending December 31,
                                1999 to those of the S&P 500 Index and the S&P
                                500/BARRA Growth Index.+
                                AVERAGE ANNUAL TOTAL RETURNS
                                (PERIODS ENDED 12/31/99)

<TABLE>
<CAPTION>
                                                                            Since
                                                                          Inception
                                                       1 Year   5 Years   (6/30/94)
                               -----------------------------------------------------
                               <S>                     <C>      <C>       <C>
                               Growth Equity Fund
                                 (reflects a maximum
                                 sales charge of
                                 5.00%)                21.35%   31.17%      28.21%
                               -----------------------------------------------------
                               S&P 500 Index(1)        21.04%   28.55%      26.75%
                               -----------------------------------------------------
                               S&P 500/BARRA Growth
                                 Index(2)              28.25%   33.63%      33.63%
                               -----------------------------------------------------
</TABLE>

                                (1)  The S&P 500 Index is an unmanaged index
                                     generally representative of the performance
                                     of large companies in the U.S. stock
                                     market.

                                (2)  The S&P 500/BARRA Growth Index is an
                                     unmanaged index generally representative of
                                     the performance of large growth companies
                                     in the U.S. stock market.


                                + The above-quoted performance information
                                  includes the performance of a predecessor fund
                                  for the period from June 30, 1994 until the
                                  Growth Equity Fund commenced operations on
                                  November 3, 1997 adjusted to reflect the
                                  deduction of fees and expenses applicable to
                                  the Growth Equity Fund as stated in this
                                  prospectus in the Fees and Expenses section
                                  (i.e., adjusted to reflect anticipated fees
                                  and expenses, absent any fee waivers). The
                                  predecessor fund was not registered under the
                                  1940 Act and therefore was not subject to
                                  certain investment restrictions, limitations
                                  and diversification requirements imposed by
                                  the Act and the Code. If the predecessor fund
                                  had been registered under the 1940 Act, its
                                  performance may have been adversely affected.
                                  The investment objective, restrictions and
                                  guidelines of the Growth Equity Fund are
                                  materially equivalent to its predecessor fund
                                  and both are managed by the same personnel.

<PAGE>   82

    PROSPECTUS

                                       45

Growth Equity Fund (continued)
FEES AND EXPENSES
---------------------------------------------------
Shareholder Fees
This table describes the shareholder fees that
you pay if you purchase or sell Fund shares. You
would pay these fees directly from your
investment in the Fund.
Maximum Sales Charge (Load) Imposed on Purchases
(as a percentage of offering price)       5.00%*
Maximum Deferred Sales Charge (Load)        0%**
(as a percentage of net asset value)
------------------------------------------------
*  The sales charges imposed on purchases of
   shares decreases as the purchase amount
   increases. In addition, a sales charge is not
   imposed on purchases of shares by certain
   investors. Please refer to the section titled
   "Your Account -- How Sales Charges are
   Calculated."

** A contingent deferred sales charge of 1.00%
   will be assessed against the proceeds of any
   redemption request relating to shares
   purchased without a sales charge in reliance
   upon the waiver accorded to purchases in the
   amount of $1 million or more, if the
   redemption request is made within one year of
   the purchase date. Please refer to the
   section titled "Your Account -- How Sales
   Charges are Calculated."
------------------------------------------------
Annual Fund Operating Expenses
This table describes the Fund's expenses that
you pay indirectly if you hold Fund shares.

Investment Advisory Fees                  0.69%+
Distribution/Service (12b-1) Fees          0.25%
Other Expenses                             0.34%
TOTAL ANNUAL FUND OPERATING EXPENSES      1.28%+
------------------------------------------------

+ During the last fiscal year, the Adviser
  waived 0.19% of its Investment Advisory Fees
  and various parties reimbursed 0.02% of Other
  Expenses. The fee waiver and reimbursements
  are expected to continue through December 31,
  2001. Accordingly, actual annual fund
  operating expenses were as follows:


      Investment Advisory Fees             0.50%
      Distribution/Service (12b-1) Fees    0.25%

      Other Expenses                       0.32%


      TOTAL ANNUAL FUND OPERATING
      EXPENSES                             1.07%

------------------------------------------------
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. The Example also
assumes that each year your investment has a 5%
return and Fund expenses remain the same.
Although your actual costs and returns may be
different, your approximate costs of investing
$10,000 in the Fund would be:

<TABLE>
<CAPTION>
   1 Year        3 Years        5 Years        10 Years
---------------------------------------------------------
<S>            <C>            <C>            <C>
    $624           $886          $1,167         $1,968
</TABLE>

                                                          ADDITIONAL
                                                          INFORMATION

                                                          DIVIDENDS
                                                          AND CAPITAL GAINS
                                                          Dividends are paid
                                                          quarterly; capital
                                                          gains, if any, are
                                                          paid annually.

                                                          INVESTMENT ADVISER
                                                          Bank of Oklahoma,
                                                          N.A.
                                                          Tulsa, OK

                                                          INCEPTION DATE
                                                          November 3, 1997

                                                          NET ASSETS AS OF
                                                          NOVEMBER 30, 2000

                                                          $134 million


                                                          SUITABLE FOR IRAS
                                                          Yes

                                                          MINIMUM INITIAL
                                                          INVESTMENT
                                                          $1,000

                                                          NEWSPAPER
                                                          ABBREVIATION
                                                          Am Perform GroEq

                                                          AMERICAN PERFORMANCE
                                                          FUND NUMBER
                                                          010

                                                          CUSIP NUMBER
                                                          028846871

                                                          TICKER SYMBOL
                                                          APGEX
<PAGE>   83

    PROSPECTUS

                                       46
FUND SUMMARIES

                                Small Cap Equity Fund
                                ------------------------------------------------

                                INVESTMENT GOAL

                                Long-term capital appreciation and, secondarily,
                                income by investing in U.S. small cap common
                                stocks.

                                PRINCIPAL INVESTMENT STRATEGY

                                The Small Cap Equity Fund seeks long-term
                                capital appreciation and, secondarily, income by
                                investing primarily in a diversified portfolio
                                of common stocks and securities convertible into
                                common stocks of small-size companies. To pursue
                                this goal, the Fund primarily invests in equity
                                securities of small capitalization U.S.
                                companies believed to be undervalued, or present
                                above average growth potential. The Fund
                                attempts to identify stocks of both undervalued
                                small capitalization companies and small
                                capitalization companies with above average
                                growth potential by employing a quantitative
                                investment approach whereby individual stocks
                                are ranked according to their relative price
                                strength, earnings estimate revisions, book-to-
                                price, sales-to-price, and cash flow to price.
                                Additional criteria the manager uses to select
                                particular stocks include volatility, momentum,
                                size, trading activity, growth, earnings yield,
                                value, earnings variability, leverage, currency
                                sensitivity, and dividend yield. Economic
                                conditions may warrant the consideration of
                                other factors when ranking individual stocks.

                                In managing the Fund's portfolio, the portfolio
                                will be constructed to exhibit investment
                                characteristics of the stocks comprising the S&P
                                Small Cap 600 Index. However, the Fund will not
                                limit its investments to stocks within the S&P
                                Small Cap 600 Index and will hold only a
                                representative sample of the stocks in the S&P
                                Small Cap 600 Index.
SMALL-CAP STOCKS:
STOCKS OF PUBLICLY TRADED COMPANIES -- AND MUTUAL FUNDS THAT HOLD THESE
STOCKS -- CAN BE CLASSIFIED BY THE COMPANIES' MARKET VALUE, OR CAPITALIZATION.
SMALL-CAP FUNDS TYPICALLY HOLD STOCKS OF COMPANIES WITH A MARKET VALUE OF LESS
THAN $1 BILLION.
THE S&P SMALL CAP 600 INDEX:

CONSISTS OF 600 DOMESTIC STOCKS CHOSEN FOR MARKET SIZE, LIQUIDITY AND INDUSTRY
GROUP REPRESENTATIONS. AS OF THE DATE OF THIS PROSPECTUS, THE S&P SMALL CAP 600
INDEX STATISTICS WERE AS FOLLOWS: THE SMALLEST COMPANY HAD A MARKET
CAPITALIZATION OF $12 MILLION, THE LARGEST COMPANY A MARKET CAPITALIZATION OF $3
BILLION, THE MEAN MARKET CAPITALIZATION WAS $551 MILLION, AND THE WEIGHTED
AVERAGE MARKET CAPITALIZATION WAS $936 MILLION.


(APPLE LOGO)

(APPLE LOGO)
<PAGE>   84

    PROSPECTUS

                                       47

Small Cap Equity Fund (continued)
                                In addition to the securities described above,
                                the Fund may invest in money market instruments,
                                U.S. Treasury obligations, and other types of
                                equity and debt securities.

                                The Fund may, from time to time, take temporary
                                defensive positions that are inconsistent with
                                the Fund's principal investment strategies in
                                attempting to respond to adverse market,
                                economic, political, or other conditions. In
                                these and in other cases, the Fund may not
                                achieve its investment goal.

                                WHAT ARE THE MAIN RISKS OF INVESTING IN THIS
                                FUND?

                                Loss of money is a risk of investing in the
                                Fund. In addition, your investment in the Fund
                                may be subject to the following principal risks:

                                - INVESTMENT STYLE RISK -- Investment style risk
                                  is the possibility that returns from small
                                  capitalization value and growth stocks will
                                  trail returns from other asset classes or the
                                  overall stock market.

                                - MARKET RISK -- Market risk is the possibility
                                  that the Fund's investments in equity
                                  securities will decline because of drops in
                                  the stock market. Stock markets tend to move
                                  in cycles, with periods of either rising or
                                  falling prices. The value of your investment
                                  will go up or down in response to these
                                  movements.

                                - SMALL CAP SECURITIES RISK -- Small cap
                                  securities risk involves the greater risk of
                                  investing in smaller, less well-known
                                  companies, especially those that have a narrow
                                  product line or are traded infrequently, than
                                  investing in established companies with proven
                                  track records.

                                The Fund may trade securities actively, which
                                could increase its transaction costs (thus
                                lowering performance) and may increase the
                                amount of taxes that you pay.
<PAGE>   85

Small Cap Equity Fund (continued)

    PROSPECTUS

                                       48
FUND SUMMARIES

                                For more information about these risks please
                                refer to the section titled "Investment
                                Practices and Risks."
                                AN INVESTMENT IN THE FUND IS NOT A DEPOSIT OR AN
                                OBLIGATION OF BANK OF OKLAHOMA, N.A., ITS
                                AFFILIATES, OR ANY BANK, AND IS NOT INSURED OR
                                GUARANTEED BY THE FEDERAL DEPOSIT INSURANCE
                                CORPORATION OR ANY OTHER GOVERNMENT AGENCY.

                                PERFORMANCE INFORMATION

                                A bar chart and performance table are not
                                included for the Small Cap Equity Fund because
                                the Fund did not commence operations until
                                2/17/99 and therefore does not have a
                                performance history for a full calendar year.
<PAGE>   86

Small Cap Equity Fund (continued)

    PROSPECTUS

                                       49

FEES AND EXPENSES
------------------------------------------------
Shareholder Fees
This table describes the shareholder fees that
you pay if you purchase or sell Fund shares. You
would pay these fees directly from your
investment in the Fund.
Maximum Sales Charge (Load) Imposed on Purchases
(as a percentage of offering price)       5.00%*
Maximum Deferred Sales Charge (Load)        0%**
(as a percentage of net asset value)

------------------------------------------------
*  The sales charges imposed on purchases of
   shares decreases as the purchase amount
   increases. In addition, a sales charge is not
   imposed on purchases of shares by certain
   investors. Please refer to the section titled
   "Your Account -- How Sales Charges are
   Calculated."

** A contingent deferred sales charge of 1.00%
   will be assessed against the proceeds of any
   redemption request relating to shares
   purchased without a sales charge in reliance
   upon the waiver accorded to purchases in the
   amount of $1 million or more, if the
   redemption request is made within one year of
   the purchase date. Please refer to the
   section titled "Your Account -- How Sales
   Charges are Calculated."
------------------------------------------------
Annual Fund Operating Expenses
This table describes the Fund's expenses that
you pay indirectly if you hold Fund shares.

Investment Advisory Fees                  0.69%+
Distribution/Service (12b-1) Fees         0.25%+

Other Expenses                             0.53%


TOTAL ANNUAL FUND OPERATING EXPENSES      1.47%+

------------------------------------------------

+ During the last fiscal year, the Adviser
  waived 0.69% of its Investment Advisory Fees,
  the Distributor waived 0.25% of its
  Distribution/Service (12b-1) Fees, and various
  parties reimbursed 0.01% of Other Expenses.
  For the period through December 31, 2001 the
  Adviser expects to waive 0.49% of its
  Investment Advisory Fees and the Distributor
  expects to waive 0.25% of its
  Distribution/Service (12b-1) Fees and various
  parties are expected to reimburse 0.01% of
  Other Expenses. Accordingly, annual fund
  operating expenses are expected to be as
  follows:



      Investment Advisory Fees             0.20%

      Distribution/Service (12b-1) Fees    0.00%

      Other Expenses                       0.52%


      TOTAL ANNUAL FUND OPERATING
      EXPENSES                             0.72%

------------------------------------------------
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. The Example also
assumes that each year your investment has a 5%
return and Fund expenses remain the same.
Although your actual costs and returns may be
different, your approximate costs of investing
$10,000 in the Fund would be:


<TABLE>
<CAPTION>
   1 Year        3 Years        5 Years        10 Years
---------------------------------------------------------
<S>            <C>            <C>            <C>
    $642           $942          $1,263         $2,170
</TABLE>


                                                          ADDITIONAL
                                                          INFORMATION

                                                          DIVIDENDS
                                                          AND CAPITAL GAINS
                                                          Dividends are paid
                                                          quarterly; capital
                                                          gains, if any, are
                                                          paid annually.

                                                          INVESTMENT ADVISER
                                                          Bank of Oklahoma,
                                                          N.A.
                                                          Tulsa, OK

                                                          INCEPTION DATE
                                                          February 17, 1999

                                                          NET ASSETS AS OF
                                                          NOVEMBER 30, 2000

                                                          $7 million


                                                          SUITABLE FOR IRAS
                                                          Yes

                                                          MINIMUM INITIAL
                                                          INVESTMENT
                                                          $1,000

                                                          NEWSPAPER
                                                          ABBREVIATION
                                                          n/a

                                                          AMERICAN PERFORMANCE
                                                          FUND NUMBER
                                                          011

                                                          CUSIP NUMBER
                                                          028846863

                                                          TICKER SYMBOL
                                                          n/a
<PAGE>   87

    PROSPECTUS

                                       50

                                  (FLAG LOGO)

                           AMERICAN PERFORMANCE FUNDS

Your Account

HOW SALES CHARGES ARE CALCULATED

Shares of each Fund are sold at their public offering price, which includes the
initial sales charge. Therefore, part of the money you invest will be used to
pay the sales charge. The remainder is invested in Fund shares. The sales charge
decreases with larger purchases. There is no sales charge on reinvested
dividends and distributions or on purchases of the Money Market Funds or the
Institutional Money Market Funds. The American Performance Institutional Money
Market Funds are offered through a separate prospectus.

The current sales charge rates are as follows:

FOR THE EQUITY FUND, THE BALANCED FUND, THE GROWTH EQUITY FUND, AND THE SMALL
CAP EQUITY FUND

<TABLE>
<CAPTION>
                                       Sales Charge        Sales Charge
                                        as a % of            as a % of
          Your Investment             Offering Price    Your Net Investment
---------------------------------------------------------------------------
<S>                                   <C>               <C>
Up to $49,999                              5.00%               5.26%
$50,000 up to $99,999                      3.75%               3.90%
$100,000 up to $249,999                    2.75%               2.83%
$250,000 up to $499,999                    2.00%               2.04%
$500,000 up to $999,999                    1.75%               1.78%
$1,000,000 and above(1)                    0.00%               0.00%
---------------------------------------------------------------------------
</TABLE>

FOR THE BOND FUND

<TABLE>
<CAPTION>
                                       Sales Charge        Sales Charge
                                        as a % of            as a % of
          Your Investment             Offering Price    Your Net Investment
---------------------------------------------------------------------------
<S>                                   <C>               <C>
Up to $49,999                              4.00%               4.17%
$50,000 up to $99,999                      3.25%               3.36%
$100,000 up to $249,999                    2.50%               2.56%
$250,000 up to $499,999                    2.00%               2.04%
$500,000 up to $999,999                    1.50%               1.52%
$1,000,000 and above(1)                    0.00%               0.00%
---------------------------------------------------------------------------
</TABLE>

(1) There is no initial sales charge on purchases of $1 million or more.
    However, a contingent deferred sales charge (CDSC) of up to 1.00% of the
    purchase price will be charged to the shareholder if shares are redeemed in
    the first year after purchase. This charge will be based on the lower of
    your cost for the shares or their net asset value (NAV) at the time of
    redemption. There will be no CDSC on reinvested distributions.
<PAGE>   88

    PROSPECTUS

                                       51

FOR THE INTERMEDIATE BOND FUND AND THE INTERMEDIATE TAX-FREE BOND FUND

<TABLE>
<CAPTION>
                                       Sales Charge        Sales Charge
                                        as a % of            as a % of
          Your Investment             Offering Price    Your Net Investment
---------------------------------------------------------------------------
<S>                                   <C>               <C>
Up to $49,999                              3.00%               3.09%
$50,000 up to $99,999                      2.50%               2.56%
$100,000 up to $249,999                    2.00%               2.04%
$250,000 up to $499,999                    1.50%               1.52%
$500,000 up to $999,999                    1.25%               1.27%
$1,000,000 and above(1)                    0.00%               0.00%
---------------------------------------------------------------------------
</TABLE>

FOR THE SHORT-TERM INCOME FUND

<TABLE>
<CAPTION>
                                       Sales Charge        Sales Charge
                                        as a % of            as a % of
          Your Investment             Offering Price    Your Net Investment
---------------------------------------------------------------------------
<S>                                   <C>               <C>
Up to $49,999                              2.00%               2.04%
$50,000 up to $99,999                      1.50%               1.52%
$100,000 up to $249,999                    1.25%               1.27%
$250,000 up to $499,999                    1.00%               1.01%
$500,000 up to $999,999                    0.75%               0.76%
$1,000,000 and above(1)                    0.00%               0.00%
---------------------------------------------------------------------------
</TABLE>

(1) There is no initial sales charge on purchases of $1 million or more.
    However, a contingent deferred sales charge (CDSC) of up to 1.00% of the
    purchase price will be charged to the shareholder if shares are redeemed in
    the first year after purchase. This charge will be based on the lower of
    your cost for the shares or their net asset value (NAV) at the time of
    redemption. There will be no CDSC on reinvested distributions.

SALES CHARGE WAIVERS

The Distributor may periodically waive the sales charges for all customers with
respect to any of the Equity Funds or Bond Funds. In addition, the Distributor
may waive the sales charge for the purchase of a Fund's shares with the proceeds
from the recent redemption of shares of another non-money market mutual fund
that imposes a sales charge.

The sales charges may also be waived for:

  1. investors who purchase through accounts with the Investment Adviser and
     through their existing trust relationship with the Investment Adviser;

  2. employees of the Investment Adviser or its affiliates;
<PAGE>   89

    PROSPECTUS

                                       52
YOUR ACCOUNT

  3. each Trustee of the Funds and any employee of a company that constitutes
     the principal business activity of a Trustee;

  4. employees of the Distributor and its affiliates;

  5. orders placed on behalf of other investment companies distributed by The
     BISYS Group, Inc. or its affiliated companies;

  6. existing shareholders who own shares in any of the Funds within their trust
     accounts and purchase additional shares outside of these trust
     relationships;

  7. investors within wrap accounts;


  8. investors who purchase in connection with 401(k) plans, 403(b) plans, and
     other employer-sponsored qualified retirement plans; Investment Retirement
     Accounts and


  9. investors who purchase in connection with non-transactional fee fund
     programs and programs offered by fee-based financial planners and other
     types of financial institutions.

Each investor described in paragraphs (2), (3), (4), (6), (8), and (9) above
must identify himself or herself at the time of purchase. When an investor who
has previously redeemed shares of any American Performance Fund re-enters the
American Performance Funds, the sales charge on the newly purchased shares will
be waived on a one-time basis in an amount up to the total of any sales charge
paid on the shares previously redeemed. If the shareholder exercising this
re-entry privilege paid a sales charge on the redeemed shares and held them for
less than 91 days, such shareholder must reduce his or her cost basis of the
redeemed shares for purposes of determining any capital gain or loss on the
redemption by the lesser of (1) the sales charge paid for those shares, or (2)
the sales charge waived in connection with the purchase of the new shares. The
Funds reserve the right to alter the terms of their sales charge waiver
practices upon sixty days' notice to shareholders.

SALES CHARGE REDUCTIONS

Reduced sales charges are available to shareholders with investments of $50,000
or more (please see the previous section titled "How Sales Charges are
Calculated.") In addition, you may qualify for reduced sales charges under the
following circumstances.

- Letter of Intent. You inform the Funds in writing that you intend to purchase
  enough shares over a 13-month period to qualify for a reduced sales charge.
  You must include a minimum of 5% of the total amount you intend to purchase
  with your letter of intent.

- Right of Accumulation. When the value of shares you already own plus the
  amount you intend to invest reaches the amount needed to qualify for reduced
  sales charges, your added investment will qualify for the reduced sales
  charge.
<PAGE>   90

    PROSPECTUS

                                       53

- Combination Privilege. Combine accounts of multiple Funds (excluding the Money
  Market Funds) or accounts of immediate family household members (spouse and
  children under 21) and businesses owned by you as sole proprietorship to
  achieve reduced sales charges.

- Concurrent Purchases. For purposes of qualifying for a reduced sales charge,
  investors have the privilege of:

     (a) combining concurrent purchases of, and holdings in, shares of any of
         the American Performance Funds purchased from a broker or dealer
         selling the American Performance Funds, sold with a sales charge
         ("Eligible Shares"); or

     (b) combining concurrent purchases of shares of any funds purchased from a
         broker or dealer selling the American Performance Funds, sold with a
         sales charge ("Other Shares") with concurrent purchases of Eligible
         Shares.

     Investors are permitted to purchase Eligible Shares at the public offering
     price applicable to the total of (a) the dollar amount of the Eligible
     Shares and Other Shares then being purchased plus (b) an amount equal to
     the then-current net asset value of the purchaser's combined holdings of
     Eligible Shares.

- Reinstatement Privilege. If you have sold shares and decide to reinvest in the
  Fund within a 90 day period, you will not be charged the applicable sales load
  on amounts up to the value of the shares you sold. You must provide a written
  reinstatement request and payment within 90 days of the date your instructions
  to sell were processed.
<PAGE>   91

    PROSPECTUS

                                       54
YOUR ACCOUNT

DISTRIBUTION/SERVICE (12B-1) FEES

The Funds (except the American Performance Institutional Money Market Funds)
have adopted a plan under Rule 12b-1 that allows each Fund to pay distribution
and service fees for the sale and distribution of its shares and for services
provided to shareholders. Because these fees are paid out of a Fund's assets
continuously, over time, these fees will increase the cost of your investment
and may cost you more than paying other types of sales charges. The maximum
distribution fee is 0.25% of the average daily net assets of a Fund.

                                OPENING AN ACCOUNT

                                1.Read this prospectus carefully.

                                2.Determine how much you want to invest. The
                                  minimum investment for the American
                                  Performance Funds is as follows:

                                   - INITIAL PURCHASE:  $1,000 for each Fund

                                   - ADDITIONAL PURCHASES:  $100 for each Fund.

                                   These minimums may be waived if purchases are
                                   made in connection with Individual Retirement
                                   Accounts, Keoghs, qualified pension plans,
                                   similar plans, or other employer plans. For
                                   more information on IRAs, Keoghs, or similar
                                   plans, contact the Funds at (918) 588-6586.
                                   The minimum investment in the Auto Invest
                                   Plan is $100. Please refer to the section
                                   titled "Additional Investor Services."

                                3.Complete the appropriate parts of the Account
                                  Registration Form, carefully following the
                                  instructions. You must submit additional
                                  documentation when opening trust, corporate or
                                  power of attorney accounts. For more
                                  information, please contact your financial
                                  representative or call the Funds at (800)
                                  762-7085.
<PAGE>   92

    PROSPECTUS

                                       55

BUYING SHARES


<TABLE>
<CAPTION>
        OPENING AN ACCOUNT                 ADDING TO AN ACCOUNT
<S>  <C>                            <C>  <C>
By Mail
-    Make out a check, bank draft,  -    Make out a check, bank draft,
     or money order for the              or money order for the
     investment amount (at least         investment amount payable (at
     $1,000), payable to the             least $100) to the American
     American Performance Funds.         Performance Funds.
-    Deliver the check, bank        -    Deliver the check, bank
     draft, or money order and           draft, or money order and
     your completed Account              investment slip attached to
     Registration Form to the            your account statement (or,
     Funds' Custodian at Bank of         if unavailable, provide the
     Oklahoma, N.A., Attention:          Fund name, amount invested,
     American Performance Funds,         account name, and account
     P.O. Box 182730, Columbus,          number) to the Funds'
     Ohio 43218-2730.                    Custodian at Bank of
                                         Oklahoma, N.A., Attention:
                                         American Performance Funds,
                                         P.O. Box 182730, Columbus,
                                         Ohio 43218-2730.
----------------------------------------------------------------------
By Overnight Mail
-    Make out a check, bank draft,  -    Make out a check, bank draft,
     or money order for the              or money order for the
     investment amount (at least         investment amount payable (at
     $1,000), payable to the             least $100) to the American
     American Performance Funds.         Performance Funds.
-    Deliver the check, bank        -    Deliver the check, bank
     draft, or money order and           draft, or money order and
     your completed Account              investment slip attached to
     Registration Form to c/o            your account statement (or,
     BISYS Fund Services, Attn:          if unavailable, provide the
     T.A. Operations, American           Fund name, amount invested,
     Performance Funds, 3435             account name, and account
     Stelzer Road, Columbus, Ohio        number) to c/o BISYS Fund
     43219-3035.                         Services, Attn: T.A.
                                         Operations, American
                                         Performance Funds, 3435
                                         Stelzer Road, Columbus, Ohio
                                         43219-3035.
----------------------------------------------------------------------

        All purchases made by check should be in U.S. dollars.
 Third party checks, credit card checks or cash will not be accepted.
</TABLE>

<PAGE>   93

    PROSPECTUS

                                       56
YOUR ACCOUNT

<TABLE>
<CAPTION>
       OPENING AN ACCOUNT               ADDING TO AN ACCOUNT
<S>                               <C>
By Telephone or Wire Transfer
- Call (800) 762-7085 for         - Deliver your completed Account
  instructions on opening an        Registration Form to the Funds
  account by wire transfer.         at: c/o BISYS Fund Services
                                    Attn: T.A. Operations
                                    3435 Stelzer Rd.
                                    Columbus, OH 43219
                                  - To place an order by telephone
                                  call the Funds at (800) 762-7085
                                    for instructions on purchasing
                                    additional shares by wire
                                    transfer.
                                  - Your bank may charge a fee to
                                  wire funds.
------------------------------------------------------------------
By Electronic Funds Transfer
- Your bank must participate in   - Establish the electronic
  the Automated Clearing House    purchase option on your Account
  and must be a U.S. bank.          Registration Form or call
                                    (800) 762-7085.
                                  - Call (800) 762-7085 to arrange
                                  an electronic purchase.
                                  - Your bank may charge a fee to
                                    electronically transfer funds.
------------------------------------------------------------------
</TABLE>
<PAGE>   94

    PROSPECTUS

                                       57

SELLING SHARES


<TABLE>
<CAPTION>
TO SELL SOME OR ALL OF YOUR SHARES
<S>                                         <C>
By Mail
- Accounts of any type.                     - Write a letter of instruction
                                              indicating the fund name, your account
- Sales of any amount.                        number, the name(s) in which the
                                              account is registered and the dollar
                                              value or number of shares you wish to
                                              sell.
                                            - Include the account owner
                                              signature(s).
                                            - Mail the materials to the Funds'
                                              Custodian at Bank of Oklahoma, N.A.,
                                              Attention: American Performance Funds,
                                              P.O. Box 182730, Columbus, Ohio
                                              43218-2730.
                                            - A check will be mailed to the name(s)
                                              and address in which the account is
                                              registered, or otherwise according to
                                              your letter of instruction.
------------------------------------------------------------------------------------
By Overnight Mail
- Accounts of any type.                     - Write a letter of instruction
                                              indicating the fund name, your account
- Sales of any amount.                        number, the name(s) in which the
                                              account is registered and the dollar
                                              value or number of shares you wish to
                                              sell.
                                            - Include the account owner
                                              signature(s).
                                            - Mail the materials to American
                                              Performance Funds, c/o BISYS Fund
                                              Services, Attn: T.A. Operations, 3435
                                              Stelzer Road, Columbus, Ohio
                                              43219-3035.
                                            - A check will be mailed to the name(s)
                                              and address in which the account is
                                              registered, or otherwise according to
                                              your letter of instruction.
------------------------------------------------------------------------------------
</TABLE>

<PAGE>   95

    PROSPECTUS

                                       58
YOUR ACCOUNT

<TABLE>
<CAPTION>
TO SELL SOME OR ALL OF YOUR SHARES
<S>                                         <C>
By Phone
- Accounts of any type.                     - Call (800) 762-7085 with instructions
                                              as to how you wish to receive your
- Sales of any amount.                        funds (mail, wire, electronic
                                              transfer).
------------------------------------------------------------------------------------
By Wire
- Accounts of any type which have elected   - Call (800) 762-7085 to request a wire
  the wire option on the Account              transfer.
  Registration Form.
                                            - If you call by 4 p.m. Eastern time,
- Sales of any amount.                        your payment will normally be wired to
                                              your bank on the next business day.
                                            - The Fund may charge a wire fee.
                                            - Your bank may charge a fee to wire
                                              funds.
------------------------------------------------------------------------------------
By Electronic Funds Transfer
- Accounts of any type.                     - Call (800) 762-7085 to request an
                                              electronic funds transfer.
- Sales of any amount.
                                            - If you call by 4 p.m. Eastern time,
- Shareholders with accounts at a U.S.        the NAV of your shares will normally
  bank which participates in the Automated    be determined on the same day and the
  Clearing House.                             proceeds will be created within 8
                                              days.
                                            - Your bank may charge a fee to
                                              electronically transfer funds.
------------------------------------------------------------------------------------
</TABLE>

Selling Shares in Writing. In certain circumstances, you may need to include a
signature guarantee, which protects you against fraudulent orders. You will need
a signature guarantee unless:

- the redemption check is payable to the shareholder(s) of record, and the check
  is mailed to the shareholder(s) of record and mailed to the address of record,
  or

- the redemption proceeds are being wired according to bank instructions
  currently on your account.

You should be able to obtain your signature guarantee from a bank, broker,
dealer, credit union, securities exchange or association, clearing agency, or
savings association. A notary public CANNOT provide a signature guarantee.
<PAGE>   96

    PROSPECTUS

                                       59


Receiving Your Money. Normally, payment of your redemption proceeds will be made
as promptly as possible and, in any event, within seven calendar days after the
redemption order is received. At various times, however, a Fund may be requested
to redeem shares for which it has not yet received good payment; collection of
payment may take ten or more days. If you have made your initial investment by
check, you cannot receive the proceeds of that check until it has cleared (which
may require up to 10 business days). You can avoid this delay by purchasing
shares with a certified check.


Involuntary Sales of Your Shares. Due to the relatively high costs of handling
small investments, each Fund reserves the right to redeem your shares at net
asset value if your account balance in any Fund drops below $500. Before any
Fund exercises its right to redeem your shares you will be given at least 60
days written notice to give you time to add to your account and avoid selling
your shares.

Refusal of Redemption Request. The Funds may postpone payment for shares at
times when the New York Stock Exchange is closed or under any emergency
circumstances as determined by the Securities and Exchange Commission. If you
experience difficulty making a telephone redemption during periods of drastic
economic or market change, you can send the Funds your request by regular or
overnight mail. Follow the instructions above under "Selling Your Shares" in
this section.

Redemption In Kind. The Funds reserve the right to make payment in securities
rather than cash, known as "redemption in kind." This could occur under
extraordinary circumstances, such as a very large redemption that could affect
Fund operations (for example, more than 1% of a Fund's net assets). If a Fund
deems it advisable for the benefit of all shareholders, redemption in kind will
consist of securities equal in market value to your shares. When you convert
these securities to cash, you will pay brokerage charges.

Undeliverable Redemption Checks. For any shareholder who chooses to receive
distributions in cash: If distribution checks (1) are returned and marked as
"undeliverable" or (2) remain uncashed for six months, your account will be
changed automatically so that all future distributions are reinvested in your
account. Checks that remain uncashed for six months will be canceled and the
money reinvested in the appropriate Fund as of the cancellation date. No
interest is paid during the time the check is outstanding.
<PAGE>   97

    PROSPECTUS

                                       60
YOUR ACCOUNT

EXCHANGING SHARES

How to Exchange Your Shares. Shares of any Fund offered in this Prospectus may
be exchanged without payment of a sales charge for shares of any American
Performance Fund having a sales charge equal to or less than that of the Fund
shares sought to be exchanged. If the shareholder exercising the exchange
privilege paid a sales charge on the exchanged shares that is less than the
sales charge applicable to the shares sought to be acquired through the
exchange, such shareholder must pay a sales charge on the exchange equal to the
difference between the sales charge paid for the exchanged shares and the sales
charge applicable to the shares sought to be acquired through the exchange. The
exchange will be made on the basis of the relative net asset values of the
shares exchanged. The Funds reserve the right to eliminate or to alter the terms
of this exchange offer upon sixty days' notice to shareholders.

A shareholder wishing to exchange his or her shares may do so by contacting the
Funds at (800) 762-7085 or by providing written instructions to the Funds at
BISYS Fund Services, 3435 Stelzer Road, Columbus, OH 43219. Any shareholder who
wishes to make an exchange must have received a current Prospectus of the Fund
in which he or she wishes to invest before the exchange will be effected.

TRANSACTION POLICIES

Valuation of Shares. The net asset value per share of a Fund is determined by
dividing the total market value of the Fund's investments and other assets, less
any liabilities, by the total number of outstanding shares of the Fund.

MONEY MARKET FUNDS


- The net asset value of each of the Money Market Funds is determined at 4:00
  p.m. on each business day in which the New York Stock Exchange ("NYSE") is
  open for trading and the Federal Reserve Bank of Kansas City is open.


- The assets in each Money Market Fund are valued based upon the amortized cost
  method. For further information about valuation of investments, see the
  Statement of Additional Information.

- The net asset value of each of the Money Market Funds is expected to remain at
  a constant $1.00 per share, although there is no assurance that this will be
  maintained.

BOND AND EQUITY FUNDS

- The net asset value of each of the Bond and Equity Funds is determined on each
  business day as of the close of regular trading of the NYSE (generally
<PAGE>   98

    PROSPECTUS

                                       61

4:00 p.m. Eastern time) on each day in which the NYSE is open for trading, and
the Federal Reserve Bank of Kansas City is open.

- The assets in each of the Bond and Equity Funds are valued at market value. If
  market quotations are not readily available, the securities will be valued at
  fair value by the Funds' Pricing Committee. For further information about
  valuation of investments, see the Statement of Additional Information.

Buy and Sell Prices. When you buy shares, you pay the net asset value next
determined after your order is received. When you sell shares, you receive the
net asset value next determined after your order is received.

ADDITIONAL INVESTOR SERVICES

Auto Invest Plan (AIP). AIP lets you set up periodic additional investments in
the Funds of your choice through automatic deductions from your bank account.
The minimum investment amount is $100 per month or quarter per Fund. To
establish, complete the appropriate section in the Account Registration Form.
The minimum initial investment in the AIP is $100 and the minimum for subsequent
investments is $50. To participate in AIP from your bank account, please attach
a voided check to your Account Registration Form.

Directed Dividend Option. By selecting the appropriate box in the Account
Registration Form, you can elect to receive your distributions in cash (check)
or have distributions (capital gains and dividends) reinvested in another
American Performance Fund without a sales charge. You must maintain the minimum
balance in each Fund into which you plan to reinvest distributions or the
reinvestment will be suspended and your distributions paid to you. The Fund may
modify or terminate this directed dividend option without notice. You can change
or terminate your participation in the directed dividend option at any time.

Systematic Withdrawal Plan (SWP). If you have at least $10,000 in your account,
you may use SWP, which allows you to receive regular distributions from your
account. Under the plan you may elect to receive automatic payments via check of
at least $100 per Fund or more on a monthly or quarterly basis. You may arrange
to receive regular distributions from your account via check by completing the
appropriate section in the Account Registration Form and attaching a voided
check or by calling (800) 762-7085. The maximum withdrawal per year is 12% of
the account value at the time of election.

DIVIDENDS AND CAPITAL GAINS


As a mutual fund shareholder, you may receive capital gains and/or income from
your investment. The Money Market Funds and Bond Funds declare income dividends
daily and pay income dividends monthly. The Equity Funds declare and pay income
dividends quarterly. The Funds distribute capital gains they

<PAGE>   99

    PROSPECTUS

                                       62
YOUR ACCOUNT


have realized, if any, at least once a year. It is unlikely that the Money
Market Funds will realize any capital gains.


We will automatically reinvest any income and capital gains distributions you
are entitled to in additional shares of your Fund(s) unless you notify our
Distributor that you want to receive your distributions in cash. To do so, send
a letter with your request, including your name and account number to:

                           American Performance Funds
                            c/o BISYS Fund Services
                               3435 Stelzer Road
                              Columbus, Ohio 43219

Your request will become effective for distributions having record dates after
our Distributor receives your request. Note that the Internal Revenue Service
treats dividends paid in additional Fund shares the same as it treats dividends
paid in cash.

TAXES

Your mutual fund investments may have a considerable impact on your tax
situation. We've summarized some of the main points you should know below. Note,
however, that the following is general information and will not apply to you if
you are investing through a tax-deferred account such as an IRA or a qualified
employee benefit plan. In addition, if you are not a resident of the United
States, you may have to pay taxes besides those described here, such as U.S.
withholding and estate taxes.

- Important Note. If you have not done so already, be sure to provide us with
  your correct taxpayer identification number OR certify that it is correct.
  Unless we have that information, the Funds may be required by law to withhold
  31% of the taxable distributions you would otherwise be entitled to receive
  from your Fund investments as well as any proceeds you would normally receive
  from selling Fund shares.

We will send you a statement each year showing the tax status of all your
distributions. The laws governing taxes change frequently, however, so please
consult your tax adviser for the most up-to-date information and specific
guidance regarding your particular tax situation. You can find more information
about the potential tax consequences of mutual fund investing in our Statement
of Additional Information.

- Taxes on Fund Distributions. You may owe taxes on Fund distributions even if
  they represent income or capital gains the Fund earned before you invested in
  it (for example, if such income or capital gains were included in the price
  you initially paid for your shares). Note that you will generally have to pay
  taxes on Fund distributions whether you received them in the form of cash or
  additional Fund shares. The Internal Revenue Service treats most mutual fund
  distributions as ordinary income. One exception is gains from the sale of
  assets
<PAGE>   100

    PROSPECTUS

                                       63

  held by a Fund for more than one year, which, for an individual shareholder
  are typically taxed at a lower rate than ordinary income regardless of how
  long such shareholder has held Fund shares.

- State and Local Taxes. In addition to federal taxes, you may have to pay state
  and local taxes on the dividends or capital gains you receive from a Fund, as
  well as on any capital gains you realized from selling or exchanging Fund
  shares.

- Dividends and Short-Term Capital Gains. The IRS treats any dividends and
  short-term capital gains you receive from the Funds as ordinary income.

- Special Considerations for Shareholders of the Intermediate Tax-Free Bond
  Fund. Shareholders of the Intermediate Tax-Free Bond Fund should note the
  following:

  - The Fund's portfolio managers expect that virtually all of the income it
    generates will be exempt from federal income taxes. If, however, you
    receive Social Security or railroad retirement benefits, you should
    consult your tax adviser to determine whether an investment in the Fund
    may affect the federal taxation of your benefits.

  - It is expected that the dividends you receive from the Fund will be exempt
    from federal income tax, however, any short-term capital gains you receive
    from the Fund will be taxed as ordinary income.

  - Some of the Fund's income may be subject to the alternative minimum tax
    for individual shareholders.

  - Corporate shareholders must include all tax-exempt interest income
    dividends in determining their federal alternative minimum tax.

- Funds Investing in Foreign Securities. If your Fund invests in foreign
  securities, the income those securities generate may be subject to foreign
  withholding taxes, which may decrease their yield. Foreign governments may
  also impose taxes on other payments or gains your Fund earns on these
  securities. In general, shareholders in these Funds will not be entitled to
  claim a credit or deduction for these foreign taxes on their U.S. tax return.
  (There are some exceptions, however; please consult your tax adviser for more
  information.) In addition, foreign investments may prompt a fund to distribute
  ordinary income more frequently and/or in greater amounts than purely domestic
  funds, which could increase your tax liability.

- Tax Consequences of Selling or Exchanging Shares. If you sell or exchange Fund
  shares (including shares of the Intermediate Tax-Free Bond Fund), you will
  generally have to report any capital gain you realize as income and any
  capital loss as a deduction on your federal income tax return. For more
  specific information about your own tax situation, consult your tax adviser.
<PAGE>   101

    PROSPECTUS

                                       64
YOUR ACCOUNT

The portfolio managers of the Funds do not actively consider tax consequences
when making investment decisions. From time to time, the Funds may realize
capital gains as by-products of ordinary investment activities. As a result, the
amount and timing of Fund distributions may vary considerably from year to year.

THESE TAX CONSIDERATIONS MAY OR MAY NOT APPLY TO YOU. PLEASE CONSULT YOUR TAX
ADVISER TO DETERMINE WHETHER THESE CONSIDERATIONS ARE RELEVANT TO YOUR
PARTICULAR INVESTMENTS AND TAX SITUATION. MORE INFORMATION ABOUT TAXES IS IN OUR
STATEMENT OF ADDITIONAL INFORMATION.
<PAGE>   102

    PROSPECTUS

                                       65

                                  (FLAG LOGO)

                           AMERICAN PERFORMANCE FUNDS

Investment Management

                                INVESTMENT ADVISER

                                Bank of Oklahoma, N.A. serves as the investment
                                adviser to each of the Funds and, subject to the
                                supervision of Board of Trustees of the American
                                Performance Funds, is responsible for the
                                day-to-day management of their investment
                                portfolios.


                                As of September 30, 2000, Bank of Oklahoma, N.A.
                                and its affiliates had $9.2 billion in assets
                                under management. Bank of Oklahoma, N.A. is a
                                subsidiary of BOK Financial Corporation ("BOK
                                Financial"). BOK Financial is controlled by its
                                principal shareholder, George B. Kaiser. Through
                                Bank of Oklahoma, N.A. and its other
                                subsidiaries, BOK Financial provides a full
                                array of trust, commercial banking and retail
                                banking. Its non-bank subsidiaries engage in
                                various bank-related services, including
                                mortgage banking and providing credit life,
                                accident, and health insurance on certain loans
                                originated by its subsidiaries.


                                The investment advisory fees paid to Bank of
                                Oklahoma, N.A., after voluntary fee reductions,
                                by the Funds for the fiscal year ended August
                                31, 2000, were as follows:

<TABLE>
<CAPTION>
                                                               % OF AVERAGE
                               FUND                             NET ASSETS
                               <S>                           <C>
                                - U.S. Treasury Fund               0.40%
                                - Cash Management Fund             0.29%
                                - Bond Fund                        0.35%
                                - Intermediate Bond Fund           0.35%
                                - Intermediate Tax-Free Bond
                                  Fund                             0.35%
                                - Short-Term Income Fund           0.00%
                                - Equity Fund                      0.50%
                                - Balanced Fund                    0.42%
                                - Growth Equity Fund               0.50%
                                - Small Cap Equity Fund            0.00%
</TABLE>
<PAGE>   103

    PROSPECTUS

                                       66
INVESTMENT MANAGEMENT

                                The persons primarily responsible for the
                                day-to-day management of each Fund, as well as
                                their previous business experience, are as
                                follows:

<TABLE>
<CAPTION>
PORTFOLIO
 MANAGER           FUND(S)                      BUSINESS EXPERIENCE
---------          -------                      -------------------
<S>         <C>                     <C>
William     Intermediate Tax-Free   Since 1963, Mr. Bequette has been a
Bequette    Bond Fund               portfolio manager for Bank of Oklahoma,
                                    N.A.
J. Brian    Bond Fund, the          Since 1993, Mr. Henderson has been a
Henderson   Intermediate Bond       portfolio manager for Bank of Oklahoma,
            Fund, and the Short-    N.A. In 1991, Mr. Henderson joined Bank of
            Term Income Fund        Oklahoma, N.A. as a Government Securities
                                    Trader and was named Investment Officer of
                                    the Capital Market Division in 1992. Prior
                                    to joining Bank of Oklahoma, N.A., Mr.
                                    Henderson was a Financial Consultant and
                                    Equity Analyst with Southwest Securities in
                                    Dallas, Texas.
Andrew W.   Balanced Fund           Since 1993, Mr. Hood has been a portfolio
Hood                                manager for Bank of Oklahoma, N.A. From
                                    1987 to 1993 Mr. Hood was a portfolio
                                    manager for Sun Trust Bank in Florida.
K.C.        Intermediate Tax-Free   Since 1994, Mr. Matthews has been a
Matthews    Bond Fund               portfolio manager for Bank of Oklahoma,
                                    N.A. Mr. Matthews joined Bank of Oklahoma,
                                    N.A. in 1993 in the Capital Markets
                                    Division.
Grafton M.  Equity Fund, the        Since 1988, Mr. Potter has served as
Potter      Growth Equity Fund,     Director of Equity Research for Bank of
            and the Small Cap       Oklahoma, N.A.
            Equity Fund
</TABLE>
<PAGE>   104

    PROSPECTUS

                                       67

                                  (FLAG LOGO)

                           AMERICAN PERFORMANCE FUNDS

Financial Highlights

The financial highlights table is intended to help you understand the Funds'
financial performance for the past 5 years or, if shorter, the period of each
Fund's operations. Certain information reflects financial results for a single
Fund share. 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). This information has been audited by KPMG LLP,
whose report, along with the Funds' financial statements, are included in the
annual report, which is available upon request.


          HOW TO READ THE           FINANCIAL HIGHLIGHTS TABLE           THIS
EXPLANATION USES THE U.S. TREASURY FUND AS AN EXAMPLE. THE FUND BEGAN FISCAL
2000 WITH A NET ASSET VALUE (PRICE) OF $1 PER SHARE. DURING THE YEAR, THE FUND
EARNED $0.051 PER SHARE FROM INVESTMENT INCOME (INTEREST AND DIVIDENDS).



SHAREHOLDERS RECEIVED $0.051 PER SHARE IN THE FORM OF DIVIDEND DISTRIBUTIONS. A
PORTION OF EACH YEAR'S DISTRIBUTIONS MAY COME FROM THE PRIOR YEAR'S INCOME.



THE EARNINGS ($0.051 PER SHARE) MINUS THE DISTRIBUTIONS ($0.051 PER SHARE)
RESULTED IN A SHARE PRICE OF $1 AT THE END OF THE YEAR. FOR A SHAREHOLDER WHO
REINVESTED THE DISTRIBUTIONS IN THE PURCHASE OF MORE SHARES, THE TOTAL RETURN
FROM THE FUND WAS 5.20% FOR THE YEAR.



AS OF AUGUST 31, 2000, THE FUND HAD $608 MILLION IN NET ASSETS. FOR THE YEAR,
ITS EXPENSE RATIO AFTER FEE WAIVERS WAS 0.71% ($7.10 PER $1,000 OF NET ASSETS);
AND ITS NET INVESTMENT INCOME AMOUNTED TO 5.11% OF ITS AVERAGE NET ASSETS.

(APPLE LOGO)
<PAGE>   105

    PROSPECTUS

                                       68
FINANCIAL HIGHLIGHTS

 U.S. TREASURY FUND


<TABLE>
<CAPTION>
                                                          YEAR ENDED AUGUST 31,
                                           ----------------------------------------------------
                                             2000       1999       1998       1997       1996
<S>                                        <C>        <C>        <C>        <C>        <C>
-----------------------------------------------------------------------------------------------
Net Asset Value, Beginning of Period       $  1.000   $  1.000   $  1.000   $  1.000   $  1.000
-----------------------------------------------------------------------------------------------

Investment Activities
 Net investment income                        0.051      0.042      0.048      0.046      0.047
                                           --------------------------------------------
     Total from Investment Activities         0.051      0.042      0.048      0.046      0.047
                                           --------------------------------------------

Distributions
 Net investment income                       (0.051)    (0.042)    (0.048)    (0.046)    (0.047)
                                           --------------------------------------------
     Total Distributions                     (0.051)    (0.042)    (0.048)    (0.046)    (0.047)

-----------------------------------------------------------------------------------------------

Net Asset Value, End of Period             $  1.000   $  1.000   $  1.000   $  1.000   $  1.000

-----------------------------------------------------------------------------------------------

Total Return                                   5.20%      4.26%      4.94%      4.74%      4.85%

-----------------------------------------------------------------------------------------------

Ratios/Supplementary Data:
 Net Assets at end of period (000)         $608,410   $394,415   $388,319   $298,424   $217,406

 Ratio of expenses to average net assets       0.71%      0.71%      0.72%      0.72%      0.74%

 Ratio of net investment income to
   average net assets                          5.11%      4.17%      4.83%      4.65%      4.74%

 Ratio of expenses to average net assets*      0.96%      0.96%      0.97%      0.97%      0.99%

-----------------------------------------------------------------------------------------------
</TABLE>



*During the period, certain fees were voluntarily reduced. If such voluntary fee
 reductions had not occurred, the ratios would have been as indicated.

<PAGE>   106

    PROSPECTUS

                                       69

 CASH MANAGEMENT FUND


<TABLE>
<CAPTION>
                                                          YEAR ENDED AUGUST 31,
                                           ----------------------------------------------------
                                             2000       1999       1998       1997       1996
<S>                                        <C>        <C>        <C>        <C>        <C>
-----------------------------------------------------------------------------------------------
Net Asset Value, Beginning of Period       $  1.000   $  1.000   $  1.000   $  1.000   $  1.000
-----------------------------------------------------------------------------------------------

Investment Activities
 Net investment income                        0.054      0.045      0.050      0.049      0.050
 Net realized and unrealized losses on
   investments                                   --         --         --     (0.010)        --
                                           ---------------------------------------------
     Total from Investment Activities         0.054      0.045      0.050      0.039      0.050
                                           ---------------------------------------------

Distributions
 Net investment income                       (0.054)    (0.045)    (0.050)    (0.049)    (0.050)
                                           ---------------------------------------------
     Total Distributions                     (0.054)    (0.045)    (0.050)    (0.049)    (0.050)
                                           ---------------------------------------------
 Capital contribution                            --         --         --      0.010         --

-----------------------------------------------------------------------------------------------

Net Asset Value, End of Period             $  1.000   $  1.000   $  1.000   $  1.000   $  1.000

-----------------------------------------------------------------------------------------------

Total Return                                   5.55%      4.63%      5.14%      5.05%(a)     5.14%

-----------------------------------------------------------------------------------------------

Ratios/Supplementary Data:
 Net Assets at end of period (000)         $647,086   $551,880   $466,571   $331,095   $375,797

 Ratio of expenses to average net assets       0.55%      0.65%      0.71%      0.72%      0.71%

 Ratio of net investment income to
   average net assets                          5.42%      4.53%      5.02%      4.93%      5.01%

 Ratio of expenses to average net assets*      0.95%      0.95%      0.96%      0.97%      0.96%

-----------------------------------------------------------------------------------------------
</TABLE>


*  During the period, certain fees were voluntarily reduced. If such voluntary
   fee reductions had not occurred, the ratios would have been as indicated.

(a) The total return includes the effect of a capital contribution of $0.010 per
    share. The return without the capital contribution would have been 4.05%.
<PAGE>   107

    PROSPECTUS

                                       70
FINANCIAL HIGHLIGHTS

 BOND FUND


<TABLE>
<CAPTION>
                                                             YEAR ENDED AUGUST 31,
                                                -----------------------------------------------
                                                 2000      1999      1998      1997      1996
<S>                                             <C>       <C>       <C>       <C>       <C>
-----------------------------------------------------------------------------------------------
Net Asset Value, Beginning of Period            $  9.18   $  9.76   $  9.29   $  8.99   $  9.29
-----------------------------------------------------------------------------------------------

Investment Activities
 Net investment income                             0.57      0.57      0.57      0.58      0.57
 Net realized and unrealized gains (losses) on
   investments                                    (0.01)    (0.58)     0.47      0.30     (0.30)
                                                ----------------------------------------
     Total from Investment Activities              0.56     (0.01)     1.04      0.88      0.27
                                                ----------------------------------------

Distributions
 Net investment income                            (0.57)    (0.57)    (0.57)    (0.58)    (0.57)
 In excess of net realized gains                               --        --        --        --
                                                ----------------------------------------
     Total Distributions                          (0.57)    (0.57)    (0.57)    (0.58)    (0.57)

-----------------------------------------------------------------------------------------------

Net Asset Value, End of Period                  $  9.17   $  9.18   $  9.76   $  9.29   $  8.99

-----------------------------------------------------------------------------------------------

Total Return (excludes sales charge)               6.38%    (0.19)%   11.54%    10.03%     2.84%

-----------------------------------------------------------------------------------------------

Ratios/Supplementary Data:
 Net Assets at end of period (000)              $56,141   $62,721   $52,706   $35,454   $32,807

 Ratio of expenses to average net assets           0.97%     0.97%     0.96%     0.94%     0.96%

 Ratio of net investment income to average net
   assets                                          6.31%     5.95%     6.02%     6.29%     6.08%

 Ratio of expenses to average net assets*          1.17%     1.17%     1.16%     1.14%     1.16%

 Portfolio turnover                               27.39%    41.02%    47.80%    83.65%    61.02%

-----------------------------------------------------------------------------------------------
</TABLE>



*During the period, certain fees were voluntarily reduced and reimbursed. If
 such voluntary fee reductions and reimbursements had not occurred, the ratios
 would have been as indicated.

<PAGE>   108

    PROSPECTUS

                                       71

 INTERMEDIATE BOND FUND


<TABLE>
<CAPTION>
                                                             YEAR ENDED AUGUST 31,
                                                -----------------------------------------------
                                                 2000      1999      1998      1997      1996
<S>                                             <C>       <C>       <C>       <C>       <C>
-----------------------------------------------------------------------------------------------
Net Asset Value, Beginning of Period            $ 10.08   $ 10.50   $ 10.23   $ 10.01   $ 10.26
-----------------------------------------------------------------------------------------------

Investment Activities
 Net investment income                             0.60      0.60      0.61      0.60      0.60
 Net realized and unrealized gains (losses) on
   investments                                       --     (0.42)     0.27      0.22     (0.25)
                                                ----------------------------------------
     Total from Investment Activities              0.60      0.18      0.88      0.82      0.35
                                                ----------------------------------------

Distributions

 Net investment income                            (0.60)    (0.60)    (0.61)    (0.60)    (0.60)
                                                ----------------------------------------
     Total Distributions                          (0.60)    (0.60)    (0.61)    (0.60)    (0.60)

-----------------------------------------------------------------------------------------------

Net Asset Value, End of Period                  $ 10.08   $ 10.08   $ 10.50   $ 10.23   $ 10.01

-----------------------------------------------------------------------------------------------

Total Return (excludes sales charge)               6.21%     1.73%     8.80%     8.38%     3.41%

-----------------------------------------------------------------------------------------------

Ratios/Supplementary Data:
 Net Assets at end of period (000)              $84,218   $87,132   $85,382   $77,319   $63,088

 Ratio of expenses to average net assets           0.96%     0.97%     0.95%     0.93%     0.95%

 Ratio of net investment income to average net
   assets                                          6.04%     5.80%     5.86%     5.89%     5.84%

 Ratio of expenses to average net assets*          1.17%     1.17%     1.15%     1.13%     1.15%

 Portfolio turnover                               34.32%    34.47%    31.98%    40.77%   129.97%

-----------------------------------------------------------------------------------------------
</TABLE>


 * During the period, certain fees were voluntarily reduced. If such voluntary
   fee reductions had not occurred, the ratios would have been as indicated.
<PAGE>   109

    PROSPECTUS

                                       72
FINANCIAL HIGHLIGHTS

 INTERMEDIATE TAX-FREE BOND FUND


<TABLE>
<CAPTION>
                                                             YEAR ENDED AUGUST 31,
                                                -----------------------------------------------
                                                 2000      1999      1998      1997      1996
<S>                                             <C>       <C>       <C>       <C>       <C>
-----------------------------------------------------------------------------------------------
Net Asset Value, Beginning of Period            $ 10.51   $ 10.99   $ 10.78   $ 10.57   $ 10.67
-----------------------------------------------------------------------------------------------

Investment Activities
 Net investment income                             0.47      0.47      0.48      0.49      0.49
 Net realized and unrealized gains (losses) on
   investments                                     0.11     (0.44)     0.28      0.21     (0.10)
                                                       ----------------------------------------
     Total from Investment Activities              0.58      0.03      0.76      0.70      0.39
                                                       ----------------------------------------

Distributions
 Net investment income                            (0.47)    (0.47)    (0.48)    (0.49)    (0.49)
 Net realized gains                               (0.06)    (0.04)    (0.07)       --        --
                                                       ----------------------------------------
     Total Distributions                          (0.53)    (0.51)    (0.55)    (0.49)    (0.49)

-----------------------------------------------------------------------------------------------

Net Asset Value, End of Period                  $ 10.56   $ 10.51   $ 10.99   $ 10.78   $ 10.57

-----------------------------------------------------------------------------------------------

Total Return (excludes sales charge)               5.78%     0.19%     7.28%     6.79%     3.68%

-----------------------------------------------------------------------------------------------

Ratios/Supplementary Data:
 Net Assets at end of period (000)              $26,902   $30,353   $30,454   $26,544   $31,036

 Ratio of expenses to average net assets           0.77%     0.75%     0.74%     0.74%     0.75%

 Ratio of net investment income to average net
   assets                                          4.58%     4.33%     4.44%     4.61%     4.58%

 Ratio of expenses to average net assets*          1.22%     1.20%     1.19%     1.19%     1.20%

 Portfolio turnover                                0.00%    11.96%    19.10%    11.38%    19.53%

-----------------------------------------------------------------------------------------------
</TABLE>


 * During the period, certain fees were voluntarily reduced. If such voluntary
   fee reductions had not occurred, the ratios would have been as indicated.
<PAGE>   110

    PROSPECTUS

                                       73

 SHORT-TERM INCOME FUND


<TABLE>
<CAPTION>
                                                             YEAR ENDED AUGUST 31,
                                                -----------------------------------------------
                                                 2000      1999      1998      1997      1996
-----------------------------------------------------------------------------------------------
<S>                                             <C>       <C>       <C>       <C>       <C>
Net Asset Value, Beginning of Period            $  9.89   $ 10.12   $  9.92   $  9.79   $  9.95
-----------------------------------------------------------------------------------------------

Investment Activities
 Net investment income                             0.62      0.59      0.62      0.61      0.59
 Net realized and unrealized gains
   (losses) on investments                         0.04     (0.23)     0.20      0.14     (0.14)
                                                       ----------------------------------------
     Total from Investment Activities              0.66      0.36      0.82      0.75      0.45
                                                       ----------------------------------------

Distributions
 Net investment income                            (0.62)    (0.59)    (0.62)    (0.61)    (0.59)
 In excess of net investment income                  --        --        --     (0.01)       --
 Net realized gains                                  --        --        --        --     (0.01)
 In excess of net realized gains                     --        --(a)      --       --     (0.01)
                                                       ----------------------------------------
     Total Distributions                          (0.62)    (0.59)    (0.62)    (0.62)    (0.61)

-----------------------------------------------------------------------------------------------

Net Asset Value, End of Period                  $  9.93   $  9.89   $ 10.12   $  9.92   $  9.79

-----------------------------------------------------------------------------------------------

Total Return (excludes sales charge)               6.92%     3.66%     8.47%     7.85%     4.64%

-----------------------------------------------------------------------------------------------

Ratios/Supplementary Data:
 Net Assets at end of period (000)              $61,650   $62,523   $32,390   $15,658   $14,399

 Ratio of expenses to average net assets           0.57%     0.56%     0.41%     0.33%     0.41%

 Ratio of net investment income to average net
   assets                                          6.30%     5.85%     6.15%     6.14%     5.95%

 Ratio of expenses to average net assets*          1.21%     1.24%     1.22%     1.16%     1.24%

 Portfolio turnover                               50.34%   109.69%    60.02%    37.55%    80.98%

-----------------------------------------------------------------------------------------------
</TABLE>


*  During the period, certain fees were voluntarily reduced. If such voluntary
   fee reductions had not occurred, the ratios would have been as indicated.

(a) Distribution per share was less than $0.005.
<PAGE>   111

    PROSPECTUS

                                       74
FINANCIAL HIGHLIGHTS

 EQUITY FUND


<TABLE>
<CAPTION>
                                                           YEAR ENDED AUGUST 31,
                                            ---------------------------------------------------
                                              2000       1999       1998       1997      1996
<S>                                         <C>        <C>        <C>        <C>        <C>
-----------------------------------------------------------------------------------------------
Net Asset Value, Beginning of Period        $  18.16   $  15.06   $  17.33   $  13.73   $ 12.33
-----------------------------------------------------------------------------------------------

Investment Activities
 Net investment income                          0.07       0.06       0.08       0.13      0.18
 Net realized and unrealized gains on
   investments                                  2.52       4.06       0.19       5.03      2.04
                                            -------------------------------------------
     Total from Investment Activities           2.59       4.12       0.27       5.16      2.22
                                            -------------------------------------------

Distributions
 Net investment income                         (0.06)     (0.06)     (0.07)     (0.13)    (0.18)
 In excess of net investment income               --         --         --      (0.01)       --
 Net realized gains                            (3.21)     (0.96)     (2.47)     (1.42)    (0.64)
                                            -------------------------------------------
     Total Distributions                       (3.27)     (1.02)     (2.54)     (1.56)    (0.82)

-----------------------------------------------------------------------------------------------

Net Asset Value, End of Period              $  17.48   $  18.16   $  15.06   $  17.33   $ 13.73

-----------------------------------------------------------------------------------------------

Total Return (excludes sales charge)           15.70%     27.92%      0.79%     40.23%    18.53%

-----------------------------------------------------------------------------------------------

Ratios/Supplementary Data:
 Net Assets at end of period (000)          $151,163   $183,777   $166,965   $170,887   $86,352

 Ratio of expenses to average net assets        1.07%      1.08%      1.07%      1.06%     1.08%

 Ratio of net investment income to average
   net assets                                   0.38%      0.33%      0.44%      0.88%     1.35%

 Ratio of expenses to average net assets*       1.26%      1.27%      1.26%      1.25%     1.27%

 Portfolio turnover                           114.90%    120.70%     72.10%     93.82%    67.46%

-----------------------------------------------------------------------------------------------
</TABLE>


 * During the period, certain fees were voluntarily reduced. If such voluntary
   fee reductions had not occurred, the ratios would have been as indicated.
<PAGE>   112

    PROSPECTUS

                                       75

 BALANCED FUND


<TABLE>
<CAPTION>
                                                             YEAR ENDED AUGUST 31,
                                                -----------------------------------------------
                                                 2000      1999      1998      1997      1996
-----------------------------------------------------------------------------------------------
<S>                                             <C>       <C>       <C>       <C>       <C>
Net Asset Value, Beginning of Period            $ 13.62   $ 12.37   $ 13.38   $ 11.28   $ 10.62
-----------------------------------------------------------------------------------------------

Investment Activities
 Net investment income                             0.31      0.34      0.40      0.41      0.35
 Net realized and unrealized gains on
   investments                                     1.37      1.90      0.21      2.46      0.79
                                                ----------------------------------------
     Total from Investment Activities              1.68      2.24      0.61      2.87      1.14
                                                ----------------------------------------

Distributions
 Net investment income                            (0.31)    (0.34)    (0.34)    (0.41)    (0.35)
 Net realized gains                               (1.11)    (0.65)    (1.28)    (0.36)    (0.13)
 In excess of net realized gains                  (0.02)       --        --        --        --
                                                ----------------------------------------
     Total Distributions                          (1.44)    (0.99)    (1.62)    (0.77)    (0.48)

-----------------------------------------------------------------------------------------------

Net Asset Value, End of Period                  $ 13.86   $ 13.62   $ 12.37   $ 13.38   $ 11.28

-----------------------------------------------------------------------------------------------

Total Return (excludes sales charge)              13.06%    18.51%     4.55%    26.33%    10.87%

-----------------------------------------------------------------------------------------------

Ratios/Supplementary Data:
 Net Assets at end of period (000)              $70,636   $56,571   $40,656   $30,249   $22,592

 Ratio of expenses to average net assets           0.76%     0.67%     0.47%     0.36%     0.38%

 Ratio of net investment income to average net
   assets                                          2.38%     2.52%     3.02%     3.34%     3.27%

 Ratio of expenses to average net assets*          1.35%     1.35%     1.34%     1.38%     1.40%

 Portfolio turnover                              124.49%    99.94%    78.07%    66.12%    71.89%

-----------------------------------------------------------------------------------------------
</TABLE>


 * During the period, certain fees were voluntarily reduced. If such voluntary
   fee reductions had not occurred, the ratios would have been as indicated.
<PAGE>   113

    PROSPECTUS

                                       76
FINANCIAL HIGHLIGHTS

 GROWTH EQUITY FUND


<TABLE>
<CAPTION>
                                                         YEAR         YEAR      NOVEMBER 3,
                                                        ENDED        ENDED        1997 TO
                                                      AUGUST 31,   AUGUST 31,   AUGUST 31,
                                                         2000         1999        1998(A)
-------------------------------------------------------------------------------------------
<S>                                                   <C>          <C>          <C>
Net Asset Value, Beginning of Period                   $  15.46     $  11.25      $ 10.00
-------------------------------------------------------------------------------------------

Investment Activities
 Net investment income                                    (0.04)          --         0.02
 Net realized and unrealized gains on investments          3.10         4.67         1.25
                                                       ------------------------------------
     Total from Investment Activities                      3.06         4.67         1.27
                                                       ------------------------------------

Distributions
 Net investment income                                       --        (0.01)       (0.02)
 In excess of net investment income                          --        (0.01)          --
 Net realized gains                                       (1.95)       (0.44)          --
                                                       ------------------------------------
     Total Distributions                                  (1.95)       (0.46)       (0.02)

-------------------------------------------------------------------------------------------

Net Asset Value, End of Period                         $  16.57     $  15.46      $ 11.25

-------------------------------------------------------------------------------------------

Total Return (excludes sales charge)                      20.45%       42.19%       12.69%(c)

-------------------------------------------------------------------------------------------

Ratios/Supplementary Data:
 Net Assets at end of period (000)                     $175,449     $135,376      $78,677

 Ratio of expenses to average net assets                   1.07%        1.09%        1.12%(b)

 Ratio of net investment income to average net
   assets                                                 (0.23)%       0.01%        0.24%(b)

 Ratio of expenses to average net assets*                  1.28%        1.28%        1.31%(b)

 Portfolio turnover                                      124.30%      124.80%       36.08%

-------------------------------------------------------------------------------------------
</TABLE>


*  During the period, certain fees were voluntarily reduced. If such voluntary
   fee reductions had not occurred, the ratio would have been as indicated.

(a) Period from commencement of operations.

(b) Annualized.

(c) Not annualized.
<PAGE>   114

    PROSPECTUS

                                       77

 SMALL CAP EQUITY FUND


<TABLE>
<CAPTION>
                                                                 YEAR      FEBRUARY 17,
                                                                ENDED        1999 TO
                                                              AUGUST 31,    AUGUST 31,
                                                                 2000        1999(A)
---------------------------------------------------------------------------------------
<S>                                                           <C>          <C>
Net Asset Value, Beginning of Period                            $10.47        $10.00
---------------------------------------------------------------------------------------

Investment Activities
 Net investment income                                            0.03          0.02
 Net realized and unrealized gains on investments                 2.21          0.46
                                                               -----------------------
     Total from Investment Activities                             2.24          0.48
                                                               -----------------------

Distributions
 Net investment income                                           (0.04)        (0.01)
 Net realized gains                                              (0.13)           --
                                                               -----------------------
     Total Distributions                                         (0.17)        (0.01)

---------------------------------------------------------------------------------------

Net Asset Value, End of Period                                  $12.54        $10.47

---------------------------------------------------------------------------------------

Total Return (excludes sales charge)                             21.60%         4.77%(c)

---------------------------------------------------------------------------------------

Ratios/Supplementary Data:
 Net Assets at end of period (000)                              $8,042        $7,390

 Ratio of expenses to average net assets                          0.52%         0.70%(b)

 Ratio of net investment income to average net assets             0.28%         0.37%(b)

 Ratio of expenses to average net assets*                         1.47%         1.63%(b)

 Portfolio turnover                                             164.17%        74.58%

---------------------------------------------------------------------------------------
</TABLE>


*  During the period, certain fees were voluntarily reduced. If such voluntary
   fee reductions had not occurred, the ratios would have been as indicated.

(a) Period from commencement of operations.

(b) Annualized.

(c) Not annualized.
<PAGE>   115

    PROSPECTUS

                                       78

                                  (FLAG LOGO)

                           AMERICAN PERFORMANCE FUNDS

Investment Practices
and Risks

INVESTMENT PRACTICES

The Funds invest in a variety of securities and employ a number of investment
techniques. Each security and technique involves certain risks. What follows is
a more comprehensive list of the securities and techniques used by the Funds, as
well as the risks inherent in their use. For a more complete discussion, see the
Statement of Additional Information. Following the table is a more complete
discussion of risk. Refer to the "Fund Summaries" section for a description of
each Fund's principal investment strategy and risks.

<TABLE>
<CAPTION>
                    FUND NAME                          FUND CODE
<S>                                                <C>
 - U.S. Treasury Fund                                      1
 - Cash Management Fund                                    2
 - Bond Fund                                               3
 - Intermediate Bond Fund                                  4
 - Intermediate Tax-Free Bond Fund                         5
 - Short-Term Income Fund                                  6
 - Equity Fund                                             7
 - Balanced Fund                                           8
 - Growth Equity Fund                                      9
 - Small Cap Equity Fund                                  10
</TABLE>

<TABLE>
<CAPTION>

INSTRUMENT                               FUND CODE          RISK TYPE
<S>                                  <C>                <C>
AMERICAN DEPOSITORY RECEIPTS             2-4, 6-10      - Market
(ADRS):                                                 - Political
ADRs are foreign shares of a                            - Foreign
company held by a U.S. bank that                          Investment
issues a receipt evidencing
ownership. Dividends are paid in
U.S. dollars.
-------------------------------------------------------------------------
ASSET-BACKED SECURITIES:                 2-4, 6, 8      - Pre-payment
Securities secured by company                           - Credit
receivables, home equity loans,                         - Interest Rate
truck and auto loans, leases,                           - Regulatory
credit card receivables and other
securities backed by other types of
receivables or other assets.
</TABLE>
<PAGE>   116

    PROSPECTUS

                                       79

<TABLE>
<CAPTION>

INSTRUMENT                               FUND CODE          RISK TYPE
<S>                                  <C>                <C>
BANKERS' ACCEPTANCES:                      2-10         - Credit
Bills of exchange or time drafts                        - Liquidity
drawn on and accepted by a                              - Interest Rate
commercial bank. Maturities are
generally six months or less.
-------------------------------------------------------------------------
CALL AND PUT OPTIONS:                    2-4, 6-10      - Credit
A call option gives the buyer the                       - Market
right to buy, and obligates the                         - Leverage
seller of the option to sell, a
security at a specified price. A
put option gives the buyer the
right to sell, and obligates the
seller of the option to buy a
security at a specified price. The
Funds will sell only covered call
and secured put options.
-------------------------------------------------------------------------
CERTIFICATES OF DEPOSIT:                   2-10         - Credit
Negotiable instruments with a                           - Liquidity
stated maturity.                                        - Interest Rate
-------------------------------------------------------------------------
COMMERCIAL PAPER:                          2-10         - Credit
Secured and unsecured short-term                        - Liquidity
promissory notes issued by                              - Interest Rate
corporations and other entities                         - Foreign
including foreign entities.                               Investment
Maturities generally vary from a
few days to nine months.
-------------------------------------------------------------------------
COMMON STOCK:                              7-10         - Market
Shares of ownership of a company.
-------------------------------------------------------------------------
CONVERTIBLE SECURITIES:                    7-10         - Market
Bonds or preferred stock that                           - Credit
convert to common stock.
-------------------------------------------------------------------------
DERIVATIVES:                               3-10         - Management
Instruments whose value is derived                      - Market
from an underlying contract, index                      - Credit
or security, or any combination                         - Liquidity
thereof, including futures, options                     - Leverage
(e.g., put and calls), options on
futures, swap agreements, and some
mortgage-backed securities.
</TABLE>
<PAGE>   117

    PROSPECTUS

                                       80
INVESTMENT PRACTICES AND RISKS

<TABLE>
<CAPTION>

INSTRUMENT                               FUND CODE          RISK TYPE
<S>                                  <C>                <C>
FOREIGN SECURITIES:                    3,4, 6, 7-10     - Market
Stocks issued by foreign companies,                     - Political
as well as commercial paper of                          - Liquidity
foreign issuers and obligations of                      - Foreign
foreign banks, overseas branches of                       Investment
U.S. banks and supranational
entities.
-------------------------------------------------------------------------
FUTURES AND RELATED OPTIONS:               3-10         - Management
A contract providing for the future                     - Market
sale and purchase of a specified                        - Credit
amount of a specified security,                         - Liquidity
class of securities, or an index at                     - Leverage
a specified time in the future and
at a specified price.
-------------------------------------------------------------------------
ILLIQUID SECURITIES:                       1-10         - Liquidity
Each Money Market Fund may invest                       - Market
up to 10% and each Bond Fund and
each Equity Fund may invest up to
15% of its net assets in securities
that are illiquid. Illiquid
securities are those securities
which cannot be disposed of in the
ordinary course of business, seven
days or less, at approximately the
value at which the Fund has valued
the securities.
-------------------------------------------------------------------------
INVESTMENT COMPANY SECURITIES:             3-10         - Market
Shares of other registered
investment companies with similar
investment objectives. A Fund may
invest up to 5% of its assets in
the shares of any one registered
investment company, but may not own
more than 3% of the securities of
any one registered investment
company or invest more than 10% of
its assets in the securities of
other registered investment
companies. These registered
investment companies may include
money market funds of the American
Performance Funds and shares of
other registered investment
companies for which the Adviser or
any of its affiliates serves as
investment adviser, administrator
or distributor.
</TABLE>
<PAGE>   118

    PROSPECTUS

                                       81

<TABLE>
<CAPTION>

INSTRUMENT                               FUND CODE          RISK TYPE
<S>                                  <C>                <C>
INVESTMENT GRADE BONDS:                    3-10         - Interest Rate
Interest-bearing or discounted                          - Credit
government or corporate securities
that obligate the issuer to pay the
bondholder a specified sum of
money, usually at specific
intervals, and to repay the
principal amount of the loan at
maturity. Investment grade bonds
are those rated BBB or better by
S&P or Baa or better by Moody's or
similarly rated by other nationally
recognized statistical rating
organizations, or, if not rated,
determined to be of comparable
quality by the Adviser.
-------------------------------------------------------------------------
LOAN PARTICIPATION INTERESTS:                2          - Interest Rate
Loan participation interests are                        - Liquidity
interests in bank loans made to                         - Credit
corporations. In these arrangements
the bank transfers the cash stream
of the underlying bank loan to the
participating investor.
-------------------------------------------------------------------------
MONEY MARKET INSTRUMENTS:                  2-10         - Interest Rate
Investment-grade, U.S.                                  - Credit
dollar-denominated debt securities
that have remaining maturities of
one year or less. These securities
may include U.S. government
obligations, commercial paper and
other short-term corporate
obligations, repurchase agreements
collateralized with U.S. government
securities, certificates of
deposit, bankers' acceptances, and
other financial institution
obligations. These securities may
carry fixed or variable interest
rates.
-------------------------------------------------------------------------
MORTGAGE-BACKED SECURITIES:                1-10         - Pre-payment
Debt obligations secured by real                        - Credit
estate loans and pools of loans.                        - Interest Rate
These include collateralized                            - Regulatory
mortgage obligations and real
estate mortgage investment
conduits.
</TABLE>
<PAGE>   119

    PROSPECTUS

                                       82
INVESTMENT PRACTICES AND RISKS

<TABLE>
<CAPTION>

INSTRUMENT                               FUND CODE          RISK TYPE
<S>                                  <C>                <C>
MUNICIPAL SECURITIES:                       2-6         - Credit
Securities issued by a state or                         - Political
political subdivision to obtain                         - Tax
funds for various public purposes.                      - Interest Rate
                                                        - Regulatory
-------------------------------------------------------------------------
PREFERRED STOCK:                           7-10         - Market
Preferred stocks are equity
securities that generally pay
dividends at a specified rate and
have preference over common stock
in the payment of dividends and
liquidation. Preferred stock
generally does not carry voting
rights.
-------------------------------------------------------------------------
REPURCHASE AGREEMENTS:                     1-10         - Credit
The purchase of a security and the
simultaneous commitment to return
the security to the seller at an
agreed upon price on an agreed upon
date. This is treated as a loan by
a Fund.
-------------------------------------------------------------------------
REVERSE REPURCHASE AGREEMENT:              1-10         - Credit
The sale of a security and the                          - Leverage
simultaneous commitment to buy the
security back at an agreed upon
price on an agreed upon date. This
is treated as a borrowing by a
Fund.
-------------------------------------------------------------------------
RESTRICTED SECURITIES:                     2-10         - Liquidity
Securities not registered under the                     - Market
Securities Act of 1933, such as
privately placed commercial paper
and Rule 144A securities.
-------------------------------------------------------------------------
SECURITIES LENDING:                        1-10         - Leverage
The lending of up to 33 1/3% of a                       - Liquidity
Fund's total assets. In return the                      - Credit
Fund will receive cash, other
securities, and/or letters of
credit.
-------------------------------------------------------------------------
TIME DEPOSITS:                             2-10         - Liquidity
Non-negotiable receipts issued by a                     - Credit
bank in exchange for the deposit of                     - Interest Rate
funds.
</TABLE>
<PAGE>   120

    PROSPECTUS

                                       83

<TABLE>
<CAPTION>

INSTRUMENT                               FUND CODE          RISK TYPE
<S>                                  <C>                <C>
TREASURY RECEIPTS:                         1, 2         - Interest Rate
Treasury receipts, Treasury
investment growth receipts, and
certificates of accrual of Treasury
securities.
-------------------------------------------------------------------------
U.S. GOVERNMENT AGENCY SECURITIES:         1-10         - Interest Rate
Securities issued by agencies and                       - Credit
instrumentalities of the U.S.
government. These include Ginnie
Mae, Fannie Mae, and Freddie Mac.
-------------------------------------------------------------------------
U.S. TREASURY OBLIGATIONS:                 1-10         - Interest Rate
Bills, notes, bonds, separately
traded registered interest and
principal securities, and coupons
under bank entry safekeeping.
-------------------------------------------------------------------------
VARIABLE AND FLOATING RATE                 2-10         - Credit
INSTRUMENTS:                                            - Liquidity
Obligations with interest rates                         - Interest Rate
which are reset daily, weekly,
quarterly or some other period and
which may be payable to the Fund on
demand.
-------------------------------------------------------------------------
WARRANTS:                                  7-10         - Interest Rate
Securities, typically issued with                       - Credit
preferred stock or bonds, that give
the holder the right to buy a
proportionate amount of common
stock at a specified price.
-------------------------------------------------------------------------
WHEN-ISSUED SECURITIES:                    1-10         - Interest Rate
Contract to purchase securities at                      - Leverage
a fixed price for delivery at a                         - Liquidity
future date.                                            - Credit
-------------------------------------------------------------------------
ZERO-COUPON DEBT OBLIGATIONS:             3, 4, 6       - Credit
Bonds and other debt that pay no                        - Interest Rate
interest, but are issued at a                           - Zero Coupon
discount from their value at
maturity. When held to maturity,
their entire return equals the
difference between their issue
price and their maturity value.
</TABLE>
<PAGE>   121

   PROSPECTUS

                                       84
INVESTMENT PRACTICES AND RISKS
INVESTMENT RISKS

Below is a more complete discussion of the types of risks inherent in the
securities and investment techniques listed above as well as those risks
discussed in "What are the main risks of investing in this Fund?" Because of
these risks, the value of the securities held by each Fund may fluctuate, as
will the value of your investment in the Fund. Certain investments and Funds are
more susceptible to these risks than others.

- Credit Risk
  The risk that the issuer of a security, or the counterparty to a contract,
  will default or otherwise become unable to honor a financial obligation.
  Credit risk is generally higher for non-investment grade securities. The price
  of a security can be adversely affected prior to actual default as its credit
  status deteriorates and the probability of default rises.

- Foreign Investment Risk
  The risk associated with higher transaction costs, delayed settlements,
  currency controls and adverse economic developments. This also includes the
  risk that fluctuations in the exchange rates between the U.S. dollar and
  foreign currencies may negatively affect an investment. Adverse changes in
  exchange rates may erode or reverse any gains produced by foreign currency
  denominated investments and may widen any losses. Exchange rate volatility
  also may affect the ability of an issuer to repay U.S. dollar denominated
  debt, thereby increasing credit risk. Foreign securities may also be affected
  by incomplete or inaccurate financial information on companies, social
  upheavals or political actions ranging from tax code changes to governmental
  collapse. These risks are more significant in emerging markets.

- Interest Rate Risk
  The risk that debt prices overall will decline over short or even long periods
  due to rising interest rates. A rise in rates typically cause a fall in
  values, while a fall in rates typically causes a rise in values. Interest rate
  risk should be modest for shorter term securities, moderate for
<PAGE>   122

   PROSPECTUS

                                       85

  intermediate-term securities, and high for longer-term securities.

- Investment Style Risk
  The risk that returns from a particular class or group of stocks (e.g., value,
  growth, small cap, large cap) will trail returns from other asset classes or
  the overall stock market. Groups or asset classes of stocks tend to go through
  cycles of doing better -- or worse -- than common stocks in general. These
  periods can last for periods as long as several years. Additionally, a
  particular asset class or group of stocks could fall out of favor with the
  market, causing the Fund to underperform funds that focus on other types of
  stocks.

- Leverage Risk
  The risk associated with securities or practices that multiply small index or
  market movements into large changes in value. Leverage is often associated
  with investments in derivatives, but also may be embedded directly in the
  characteristics of other securities. Leveraged risk is hedged when a
  derivative (a security whose value is based on another security or index) is
  used as a hedge against an opposite position that a Fund also holds, any loss
  generated by the derivative should be substantially offset by gains on the
  hedged investment, and vice versa. Hedges are sometimes subject to imperfect
  matching between the derivative and underlying security, and there can be no
  assurance that a Fund's hedging transactions will be effective.

- Liquidity Risk
  The risk that certain securities may be difficult or impossible to sell at the
  time and the price that would normally prevail in the market. The seller may
  have to lower the price, sell other securities instead or forego an investment
  opportunity, any of which could have a negative effect on Fund management or
  performance. This includes the risk of missing out on an investment
  opportunity because the assets necessary to take advantage of it are tied up
  in less advantageous investments.
<PAGE>   123

   PROSPECTUS

                                       86
INVESTMENT PRACTICES AND RISKS

- Management Risk
  The risk that a strategy used by a Fund's portfolio manager may fail to
  produce the intended result. This includes the risk that changes in the value
  of a hedging instrument will not match those of the asset being hedged.
  Incomplete matching can result in unanticipated risks.

- Market Risk
  The risk that the market value of a security may move up and down, sometimes
  rapidly and unpredictably. These fluctuations may cause a security to be worth
  less than the price originally paid for it, or less than it was worth at an
  earlier time. Market risk may affect a single issuer, industrial sector of the
  economy or the market as a whole. Finally, key information about a security or
  market may be inaccurate or unavailable. This is particularly relevant to
  investments in foreign securities.

- Political Risk
  The risk of losses attributable to unfavorable governmental or political
  actions, seizure of foreign deposits, changes in tax or trade statutes, and
  governmental collapse and war.

- Pre-Payment/Call Risk
  The risk that the principal repayment of a security will occur at an
  unexpected time. Prepayment risk is the chance that the repayment of a
  mortgage will occur sooner than expected. Call risk is the possibility that
  during periods of falling interest rates, a bond issuer will "call" -- or
  repay -- its high-yielding bond before the bond's maturity date. Changes in
  pre-payment/call rates can result in greater price and yield volatility.

  Pre-payments/calls generally accelerate when interest rates decline. When
  mortgage and other obligations are pre-paid, a Fund may have to reinvest in
  securities with a lower yield. In this event, the Fund would experience a
  decline in income -- and the potential for taxable capital gains. Further,
  with early prepayment, a Fund
<PAGE>   124

   PROSPECTUS

                                       87

  may fail to recover any premium paid, resulting in an unexpected capital loss.
  Prepayment/call risk is generally low for securities with a short-term
  maturity, moderate for securities with an intermediate-term maturity, and high
  for securities with a long-term maturity.

- Regulatory Risk
  The risk associated with Federal and state laws which may restrict the
  remedies that a lender has when a borrower defaults on loans. These laws
  include restrictions on foreclosures, redemption rights after foreclosure,
  Federal and state bankruptcy and debtor relief laws, restrictions on "due on
  sale" clauses, and state usury laws.

- Small Cap Securities Risk
  Stocks of small-capitalization companies are more risky than stocks of larger
  companies and may be more vulnerable than larger companies to adverse business
  or economic developments. Many of these companies are young and have a limited
  track record. Small cap companies may also have limited product lines,
  markets, or financial resources. Securities of such companies may be less
  liquid and more volatile than securities of larger companies or the market
  averages in general and, therefore, may involve greater risk than investing in
  larger companies. In addition, small cap companies may not be well-known to
  the investing public, may not have institutional ownership, and may have only
  cyclical, static, or moderate growth prospects. If a Fund concentrates on
  small-capitalization companies, its performance may be more volatile than that
  of a fund that invests primarily in larger companies.

- Tax Risk
  The risk that the issuer of the securities will fail to comply with certain
  requirements of the Internal Revenue Code, which would cause adverse tax
  consequences.
<PAGE>   125

   PROSPECTUS

                                       88
INVESTMENT PRACTICES AND RISKS

- Zero Coupon Risk
  The market prices of securities structured as zero coupon or pay-in-kind
  securities are generally affected to a greater extent by interest rate
  changes. These securities tend to be more volatile than securities which pay
  interest periodically.
<PAGE>   126

    PROSPECTUS

                                       89

                                  (FLAG LOGO)

                           AMERICAN PERFORMANCE FUNDS

Glossary of Investment Terms

ALTERNATIVE MINIMUM TAX
A measure designed to assure that individuals pay at least a minimum amount of
federal income taxes. Certain securities used to fund private, for-profit
activities are subject to AMT.

BALANCED FUND
A mutual fund that seeks to provide some combination of income, capital growth,
and conservation of principal by investing in stocks, bonds, and/or money market
instruments.

BOND
A debt security issued by a corporation, government, or government agency in
exchange for the money you lend it. In most instances, the issuer agrees to pay
back the loan by a specific date and make regular interest payments until that
date.

CAPITAL GAINS DISTRIBUTION
Payment to mutual fund shareholders of gains realized on securities that the
fund has sold at a profit, minus any realized losses.

COMMON STOCK
A security representing ownership rights in a corporation. A stockholder is
entitled to share in the company's profits, some of which may be paid out as
dividends.

CREDIT QUALITY
A measure of a bond issuer's ability to repay interest and principal in a timely
manner.

DIVERSIFIED
Holding a variety of securities so that a fund's return is not badly hurt by the
poor performance of a single security or industry.

DIVIDENDS
Payment to shareholders of income from interest or dividends generated by a
fund's investments.

FIXED INCOME SECURITIES
Investments, such as bonds, that have a fixed payment schedule. While the level
of income offered by these securities is predetermined, their prices may
fluctuate.

GROWTH STOCKS
Stocks of companies believed to have above-average prospects for growth.
Reflecting market expectations for superior growth, the prices of growth stocks
often are relatively high in comparison to revenue, earnings, book value, and
dividends.
<PAGE>   127

    PROSPECTUS

                                       90
GLOSSARY OF INVESTMENT TERMS

INDEX
An unmanaged group of securities whose overall performance is used as a standard
to measure investment performance.

INVESTMENT ADVISER
An organization that makes the day-to-day decisions regarding a fund's
investments.

INVESTMENT GRADE
A bond whose credit quality is considered by independent bond-rating agencies to
be sufficient to ensure timely payment of principal and interest under current
economic circumstances.

LIQUIDITY
The degree of a security's marketability (that is, how quickly the security can
be sold at a fair price and converted to cash).

MATURITY
The date when a bond issuer agrees to repay the bond's principal, or face value,
to the bond's buyer.

MONEY MARKET FUND
A mutual fund that seeks to provide income, liquidity, and a stable share price
by investing in very short-term, liquid investments.

MONEY MARKET INSTRUMENTS
Short-term, liquid investments (usually with a maturity of 13 months or less)
which include U.S. Treasury bills, bank certificates of deposit (CDs),
repurchase agreements, commercial paper, and bankers' acceptances.

MUNICIPAL SECURITY
Debt obligations issued by a state or local government. Interest income from
municipal securities, and therefore dividend income from municipal bond funds,
is generally free from federal income taxes, as well as taxes in the state in
which the securities were issued.

MUTUAL FUND
An investment company that pools the money of many people and invests it in a
variety of securities in an effort to achieve a specific objective over time.

NET ASSET VALUE (NAV)
The market value of a mutual fund's total assets, minus liabilities, divided by
the number of shares outstanding. The value of a single share is called its
share value or share price.

OPERATING EXPENSES
The percentage of a fund's average net assets used to pay its expenses.
Operating expenses include investment advisory fees, distribution/service
(12b-1) fees, and administration fees.
<PAGE>   128

    PROSPECTUS

                                       91

SECURITIES
Stocks, bonds, money market instruments, and other investment vehicles.

TOTAL RETURN
A percentage change, over a specified time period, in a mutual fund's net asset
value, with the ending net asset value adjusted to account for the reinvestment
of all distributions of dividends and capital gains.

VALUE STOCKS
Stocks of companies whose growth prospects are generally regarded as subpar by
the market. Reflecting these market expectations, the prices of value stocks
typically are below-average in comparison to such factors as revenue, earnings,
book value, and dividends.

VOLATILITY
The fluctuations in value of a mutual fund or other security. The greater a
fund's volatility, the wider the fluctuations between its high and low prices.

YIELD
Income (interest and dividends) earned by an investment, expressed as a
percentage of the investment's price.
<PAGE>   129

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<PAGE>   130

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<PAGE>   131

                                  (FLAG LOGO)

                           AMERICAN PERFORMANCE FUNDS

More Information

                                More information about the Funds is available
                                without charge through the following:

                                STATEMENT OF ADDITIONAL INFORMATION (SAI)
                                More detailed information about the American
                                Performance Funds is included in our SAI. The
                                SAI has been filed with the SEC and is
                                incorporated by reference into this prospectus.
                                This means that the SAI, for legal purposes, is
                                a part of this prospectus.
                                ANNUAL AND SEMI-ANNUAL REPORTS
                                These reports list the Funds' holdings and
                                contain information on the market conditions and
                                investment strategies that significantly
                                affected the American Performance Funds'
                                performance during the last year.
                                TO OBTAIN THE SAI, ANNUAL OR SEMI-ANNUAL
                                REPORTS, OR MORE INFORMATION:
                                BY TELEPHONE:
                                Call 1-800-762-7085

                                BY MAIL:
                                American Performance Funds
                                3435 Stelzer Road
                                Columbus, Ohio 43219-3035
                                BY INTERNET:
                                http://www.apfunds.com

                                FROM THE SEC:
                                You can also obtain the SAI, the Annual and
                                Semi-Annual Reports, and other information about
                                the American Performance Funds, from the SEC's
                                web site (http://www.sec.gov). You may review
                                and copy documents at the SEC Public Reference
                                Room in Washington, DC (for information call
                                1-202-942-8090). You may request documents by
                                mail from the SEC, upon payment of a duplicating
                                fee, by writing to: Securities and Exchange
                                Commission, Public Reference Section, 450 5th
                                Street, N.W., Washington, DC 20549-0102 or by
                                sending an e-mail to: [email protected].

                                American Performance Funds' Investment Company

                                Act registration number is 811-6114.

INVESTMENT ADVISER

Bank of Oklahoma, N.A.
Bank Oklahoma Tower
Tulsa, Oklahoma 74103

DISTRIBUTOR &
ADMINISTRATOR

BISYS Fund Services
3435 Stelzer Road
Columbus, Ohio
43219-3035

LEGAL COUNSEL

Ropes & Gray
1301 K Street, N.W.
Suite 800 East
Washington, DC 20005



<PAGE>   132
                       STATEMENT OF ADDITIONAL INFORMATION




                           AMERICAN PERFORMANCE FUNDS

                     AMERICAN PERFORMANCE MONEY MARKET FUNDS
                         AMERICAN PERFORMANCE BOND FUNDS
                        AMERICAN PERFORMANCE EQUITY FUNDS





                                 January 1, 2001




This Statement of Additional Information is not a Prospectus, but should be read
in conjunction with the Prospectuses for the American Performance Money Market
Funds, the American Performance Bond Funds, and the American Performance Equity
Funds, each dated January 1, 2001. This Statement of Additional Information is
incorporated in its entirety into those Prospectuses. A copy of each Prospectus
for the American Performance Funds (the "Funds") may be obtained by writing to
the Funds at 3435 Stelzer Road, Columbus, Ohio 43219, or by telephoning (800)
762-7085.
<PAGE>   133
                                TABLE OF CONTENTS
                                -----------------

<TABLE>
<S>                                                                     <C>


THE FUNDS...............................................................B-1

INVESTMENT OBJECTIVE AND POLICIES.......................................B-1
         ADDITIONAL INFORMATION ON FUND INSTRUMENTS.....................B-2
                  Asset-Backed Securities...............................B-5
                  Bank Obligations......................................B-5
                  Calls.................................................B-6
                  Foreign Investments...................................B-8
                  Futures Contracts.....................................B-8
                  Investment Company(10) Services(11)...................B-9
                  Loan Participation....................................B-10
                  Mortgage-Related Securities...........................B-10
                  Municipal Securities..................................B-12
                  Options...............................................B-13
                  Private Placement Investments.........................B-14
                  Puts..................................................B-14
                  Repurchase Agreements.................................B-15
                  Reverse Repurchase Agreements.........................B-15
                  Securities Lending....................................B-16
                  U.S. Government Obligations...........................B-16
                  Variable Amount and Floating Rate Notes...............B-16
                  When-Issued Securities................................B-18
                  Zero Coupon Obligations...............................B-18

         INVESTMENT RESTRICTIONS........................................B-19

         PORTFOLIO TURNOVER.............................................B-23

         ADDITIONAL TAX INFORMATION CONCERNING ALL THE FUNDS............B-23

         ADDITIONAL TAX INFORMATION CONCERNING THE INTERMEDIATE TAX-FREE
         BOND FUND......................................................B-26

VALUATION...............................................................B-28

ADDITIONAL PURCHASE AND REDEMPTION INFORMATION..........................B-29
</TABLE>


                                       i
<PAGE>   134

<TABLE>
<S>                                                                     <C>
MANAGEMENT AND SERVICE PROVIDERS OF THE(32) FUND(33)....................B-31
         TRUSTEES AND OFFICERS..........................................B-31
         INVESTMENT ADVISER.............................................B-33
         DISTRIBUTION...................................................B-35
         GLASS-(38) STEAGAL(39) ACT.....................................B-36
         PORTFOLIO TRANSACTIONS.........................................B-37
         ADMINISTRATOR..................................................B-39
         SUB-ADMINISTRATOR..............................................B-40
         DISTRIBUTOR....................................................B-40
         CUSTODIAN, TRANSFER AGENT AND FUND ACCOUNTANT..................B-41
         LEGAL COUNSEL..................................................B-42

ADDITIONAL INFORMATION..................................................B-42
         DESCRIPTION OF SHARES..........................................B-42
         SHAREHOLDER AND TRUSTEE LIABILITY..............................B-43
         CALCULATION OF PERFORMANCE(50) DATE(51)........................B-44
         PERFORMANCE COMPARISONS........................................B-46
         MISCELLANEOUS..................................................B-47

FINANCIAL STATEMENTS....................................................B-51

APPENDIX................................................................B-52
</TABLE>


                                       ii
<PAGE>   135
                                    THE FUNDS

         The American Performance Funds (the "Funds") is a diversified open-end
management investment company. The Funds presently consist of twelve series of
units of beneficial interest ("Shares"), representing interests in the following
portfolios:

         American Performance Institutional U.S. Treasury Fund (the
         "Institutional U.S. Treasury Fund")
         American Performance Institutional Cash Management Fund (the
         "Institutional Cash Management Fund")
         American Performance U.S. Treasury Fund (the "U.S. Treasury Fund")
         American Performance Cash Management Fund (the "Cash Management Fund")
         American Performance Bond Fund (the "Bond Fund")
         American Performance Intermediate Bond Fund (the "Intermediate Bond
         Fund")
         American Performance Intermediate Tax-Free Bond Fund (the "Intermediate
         Tax-Free Bond Fund")
         American Performance Short-Term Income Fund (the "Short-Term Income
         Fund")
         American Performance Equity Fund (the "Equity Fund")
         American Performance Balanced Fund (the "Balanced Fund")
         American Performance Growth Equity Fund (the "Growth Equity Fund")
         American Performance Small Cap Equity Fund ("Small Cap Equity Fund")

         This Statement of Additional Information ("SAI") relates to all the
Funds listed above except for the Institutional U.S. Treasury Fund and the
Institutional Cash Management Fund which have a separate SAI dated December 11,
2000. The U.S. Treasury Fund and the Cash Management Fund are sometimes referred
to as the "Money Market Funds," the Bond Fund, the Intermediate Bond Fund, the
Intermediate Tax-Free Bond Fund, and the Short-Term Income Fund are sometimes
referred to as the "Bond Funds," and the Equity Fund, the Balanced Fund, the
Growth Equity Fund, and the Small Cap Equity Fund are sometimes referred to as
the "Equity Funds." The information contained in this document expands upon
subjects discussed in the Prospectuses for the Funds. An investment in a Fund
should not be made without first reading that Fund's Prospectus.

                        INVESTMENT OBJECTIVE AND POLICIES

         The following policies supplement each Fund's investment objective and
policies as set forth in the respective Prospectus for that Fund.

                                      B-1
<PAGE>   136
ADDITIONAL INFORMATION ON THE FUNDS
-----------------------------------

The Money Market Funds
----------------------


         All securities or instruments in which either of the Money Market Funds
invests are valued based on the amortized cost valuation technique pursuant to
Rule 2a- 7 under the Investment Company Act of 1940, as amended (the "1940
Act"). All instruments in which either of the Money Market Funds invests will
have remaining maturities of 397 days or less, although instruments subject to
repurchase agreements and certain variable or floating rate obligations may bear
longer maturities. The average dollar-weighted maturity of the securities in
each of the Money Market Funds will not exceed 90 days. Obligations purchased by
the Money Market Funds are limited to U.S. dollar-denominated obligations which
the Board of Trustees has determined present minimal credit risks.

         The Cash Management Fund will invest only in issuers or instruments
that at the time of purchase (1) have received the highest short-term rating by
at least two nationally recognized statistical ratings organizations ("NRSROs")
(e.g., "A-1" by Standard & Poor's Corporation ("S&P") and "Prime-1" by Moody's
Investors Services, Inc. ("Moody's")); or (2) are single rated and have received
the highest short-term rating by a NRSRO; or (3) are unrated, but are determined
to be of comparable quality by the Investment Adviser pursuant to guidelines
approved by the Board of Trustees and subject to the ratification of the Board
of Trustees. See the Appendix for definitions of the foregoing instruments and
rating systems.

         The Fund may, from time to time, concentrate its investments in certain
securities issued by U.S. banks, U.S. branches of foreign banks and foreign
branches of U.S. banks. Concentration in obligations issued by commercial banks
and bank holding companies will involve a greater exposure to economic,
business, political, or regulatory changes that are generally adverse to banks
and bank holding companies. Such changes could include significant changes in
interest rates, general declines in bank asset quality, including real estate
loans, and the imposition of costly or otherwise burdensome government
regulations or restrictions. The Fund will not purchase securities issued by
Bank of Oklahoma, N.A. ("BOK" or "Adviser") or any of its affiliates.

         Obligations issued or guaranteed by U.S. government agencies or
instrumentalities in which the Cash Management Fund may invest can vary
significantly in terms of the credit risk involved. Obligations of certain
agencies and instrumentalities of the U.S. government such as the Government
National Mortgage Association and the Export-Import Bank of the United States,
are supported by the full faith and credit of the U.S. Treasury; others, such as
those of the Federal National Mortgage Association, are supported by the right
of the issuer to borrow from the U.S. Treasury; others, such as those of the
Student Loan Marketing Association, are supported by the discretionary authority
of the U.S. government to purchase the agency's obligations; still others, such
as those of the Federal Farm Credit Banks or the Federal Home Loan Mortgage
Corporation, are supported only by the credit of the instrumentality. No
assurance can be given that the U.S. government would provide financial support
to U.S.

                                      B-2
<PAGE>   137
government-sponsored agencies or instrumentalities if it is not obligated to do
so by law. The Cash Management Fund will invest in the obligations of such
agencies or instrumentalities only when the Adviser deems the credit risk with
respect thereto to be minimal.

The Bond Funds
--------------

         The Bond Fund, the Intermediate Bond Fund, and the Short-Term Income
Fund will invest in debt securities only if they carry a rating within the three
highest ratings categories assigned by an NRSRO (e.g., at least "A" from
Moody's), or S&P (including all sub-classifications indicated by modifiers of
such "A" ratings)) or, if unrated, are deemed by the Adviser under guidelines
established by the Funds' Board of Trustees to present attractive opportunities
and to be of comparable quality to the securities so rated. See "Appendix" for
an explanation of these ratings.

         The Bond Fund, the Intermediate Bond Fund, and the Short-Term Income
Fund, under normal market conditions, will each invest at least 65% of the value
of their total assets in bonds, except that, when market conditions indicate a
temporary defensive investment strategy as determined by the Funds' Adviser,
more than 35% of the Bond Fund's, the Intermediate Bond Fund's, or the
Short-Term Income Fund's assets may be held in cash equivalents. For purposes of
the above-stated policies, "bonds" includes any debt instrument with a remaining
maturity of one year or more.

         Under normal market conditions at least 80% of the net assets of the
Intermediate Tax-Free Bond Fund will be invested in a diversified portfolio of
obligations (such as bonds, notes, and debentures) issued by or on behalf of
states, territories and possessions of the United States, the District of
Columbia and other political subdivisions, agencies, instrumentalities and
authorities, the interest on which is both exempt from federal income taxes and
not treated as a preference item for individuals for purposes of the federal
alternative minimum tax ("Municipal Securities"). The Fund invests in Municipal
Securities which are rated at the time of purchase within the three highest
rating groups assigned by an NRSRO, in the case of bonds (e.g. at least A by
Moody's or S&P); rated within the highest ratings category assigned by an NRSRO,
in the case of notes (e.g., "SP-1" by S&P or "MIG-1" by Moody's); rated in the
highest ratings category assigned by an NRSRO, in the case of tax-exempt
commercial paper (e.g., "A-1" or higher by S&P or "Prime-1" by Moody's); or
rated in the highest ratings category assigned by an NRSRO, in the case of
variable rate demand obligations, (e.g., "VMIG-1" by Moody's). This is a
fundamental policy and may only be changed by the vote of a majority of the
outstanding Shares of the Intermediate Tax-Free Bond Fund.

         Bonds, notes, and debentures in which the Bond Funds may invest may
differ in interest rates, maturities and times of issuance. The market value of
the Bond Funds' debt securities will change in response to interest rate changes
and other factors. During periods of falling interest rates, the value of
outstanding debt securities generally rise. Conversely, during periods of rising
interest rates, the value of such securities generally decline. Moreover, while
securities with longer maturities tend to produce higher yields, the price of
longer maturity securities is also subject to greater fluctuations as a result
of changes in interest rates. Conversely, securities with shorter maturities
generally have less price movement than securities of comparable quality with

                                      B-3
<PAGE>   138
longer maturities. Changes by NRSROs in the rating of any debt security and in
the ability of an issuer to make payments of interest and principal also affect
the value of these investments. Except under conditions of default, changes in
the value of a Bond Fund's portfolio securities will not affect cash income
derived from these securities but will affect a Bond Fund's net asset value.

The Equity Funds
----------------

         Under normal market conditions, the Equity Fund and the Growth Equity
Fund will invest at least 70% and the Small Cap Equity Fund will invest at least
65% of the value of their respective total assets in common stocks and
securities convertible into common stocks of companies believed by the Adviser
to be characterized by sound management and the ability to finance expected
growth. The Equity Fund, the Growth Equity Fund, and the Small Cap Equity Fund
may also invest up to 30% of their respective total assets in preferred stocks,
corporate bonds, notes, warrants, and cash equivalents. Corporate bonds will be
rated at the time of purchase within the three highest ratings categories
assigned by an NRSRO (e.g., at least "A" by Moody's or S&P) or, if not rated,
found by the Adviser under guidelines established by the Funds' Board of
Trustees to be of comparable quality.

         Under normal market conditions, the Balanced Fund will invest in equity
securities consisting of common stocks but may also invest in other equity-type
securities such as warrants, convertible preferred stocks and convertible debt
instruments. The Balanced Fund's equity investments will be in companies
believed by its Adviser to be undervalued. The Balanced Fund's debt securities
will consist of securities such as bonds, notes, debentures and money market
instruments. The average dollar-weighted portfolio maturity of debt securities
held by the Balanced Fund will vary according to market conditions and interest
rate cycles and will range between 1 year and 30 years under normal market
conditions. While securities with longer maturities tend to produce higher
yields, the price of longer maturity securities is also subject to greater
market fluctuations as a result of changes in interest rates. The Balanced
Fund's debt securities will consist of high grade securities, which are those
securities rated within the three highest ratings categories assigned by an
NRSRO at the time of purchase (e.g. , at least "A" from Moody's or S&P
(including all sub-classifications indicated by modifiers of such "A" ratings))
or, if not rated, found by the Adviser under guidelines established by the
Funds' Board of Trustees to be of comparable quality.

         It is a fundamental policy of the Balanced Fund that it will invest at
least 25% of its total assets in fixed-income securities. For this purpose,
fixed-income securities include debt securities, mortgage-related securities,
nonconvertible preferred stock and that portion of the value of securities
convertible into common stock, including convertible preferred stock and
convertible debt, which is attributable to the fixed-income characteristics of
those securities.

         Certain debt securities such as, but not limited to, mortgage backed
securities and CMOs, as well as securities subject to prepayment of principal
prior to the stated maturity date, are expected to be repaid prior to their
stated maturity dates. The Adviser determines the "effective maturity" of the
securities based on the expected payment date (which is earlier than the stated
maturity dates of the securities). For purposes of calculating the Balanced
Fund's weighted

                                      B-4
<PAGE>   139
average portfolio maturity, the effective maturity of such securities, as
determined by the Adviser, will be used.

ADDITIONAL INFORMATION ON FUND INSTRUMENTS
------------------------------------------

         ASSET-BACKED SECURITIES
         -----------------------

         The Cash Management Fund, Bond Fund, the Intermediate Bond Fund, and
the Short-Term Income Fund may invest in securities backed by automobile
receivables and credit-card receivables and other securities backed by other
types of receivables or other assets. Credit support for asset-backed securities
may be based on the underlying assets and/or provided through credit
enhancements by a third party. Credit enhancement techniques include letters of
credit, insurance bonds, limited guarantees (which are generally provided by the
issuer), senior-subordinated structures and over-collateralization. These Funds
will only purchase an asset-backed security if it is rated within the three
highest ratings categories assigned by an NRSRO (e.g., at least "A" by S&P or
Moody's). Asset-backed securities are generally considered to be illiquid.

         BANK OBLIGATIONS
         ----------------

         The Cash Management Fund, the Bond Funds, and the Equity Funds may
invest in obligations of the banking industry such as bankers' acceptances,
commercial paper, loan participations, bearer deposit notes, promissory notes,
floating or variable rate obligations, certificates of deposit, and demand and
time deposits.

         Bankers' acceptances: Bankers' acceptances are negotiable drafts or
bills of exchange typically drawn by an importer or exporter to pay for specific
merchandise, which are "accepted" by a bank, meaning, in effect, that the bank
unconditionally agrees to pay the face value of the instrument on maturity. The
Funds will invest in only those bankers' acceptances guaranteed by domestic and
foreign banks having, at the time of investment, total assets in excess of $1
billion (as of the date of their most recently published financial statements).

         Certificates of deposit: Certificates of deposit are negotiable
certificates issued against funds deposited in a commercial bank for a definite
period of time and earning a specified return. Certificates of deposit will be
those of domestic and foreign branches of U.S. commercial banks which, at the
time of purchase, have total assets in excess of $1 billion (as of the date of
their most recently published financial statements). Certificates of deposit may
also include those issued by foreign banks outside the United States with total
assets at the time of purchase, in excess of the equivalent of $1 billion. The
Funds may also invest in Eurodollar certificates of deposit which are U.S.
dollar-denominated certificates of deposit issued by branches of foreign and
domestic banks located outside the United States and Yankee certificates of
deposit which are certificates of deposit issued by a U.S. branch of a foreign
bank denominated in U.S. dollars and held in the United States.

                                      B-5
<PAGE>   140
         In addition, the Funds may invest in bearer deposit notes, which are
negotiable time deposits with a specific maturity date issued by a bank, and
time deposits, which are interest bearing non-negotiable deposits at a bank that
have a specific maturity date.

         Commercial Paper: Commercial paper consists of unsecured promissory
notes issued by corporations. Except as noted below with respect to variable
amount master demand notes, issues of commercial paper normally have maturities
of nine months or less and fixed rates of return.

         The Funds may also invest in Canadian Commercial Paper which is
commercial paper issued by a Canadian corporation or a Canadian counterpart of a
U.S. corporation and in Europaper which is U.S. dollar-denominated commercial
paper of a foreign issuer.

         The Bond, Intermediate Bond, and Short-Term Income Funds will only
purchase commercial paper rated at the time of purchase within the highest
ratings categories assigned by an NRSRO (e.g., A-1 by S&P, Prime-1 by Moody's or
F- 1 by Fitch Investors Service) or, if not rated, found by the Adviser under
guidelines established by the Funds' Board of Trustees to be of comparable
quality.

         CALLS
         -----

         The Bond Funds and the Equity Funds may write (sell) "covered" call
options and purchase options to close out options previously written by the
Fund. Such options must be listed on a national securities exchange. The purpose
of each Fund in writing covered call options is to generate additional premium
income. This premium income will serve to enhance the Fund's total return and
will reduce the effect of any price decline of the security involved in the
option.

         A call option gives the holder (buyer) the "right to purchase" a
security at a specified price (the exercise price) at any time until a certain
date (the expiration date). So long as the obligation of the writer of a call
option continues, the writer may be assigned an exercise notice by the
broker-dealer through whom such option was sold, requiring the writer to deliver
the underlying security against payment of the exercise price. This obligation
terminates upon the expiration of the call option, or such earlier time at which
the writer effects a closing purchase transaction by purchasing an option
identical to that previously sold. To secure the writer's obligation to deliver
the underlying security in the case of a call option, subject to the rules of
the Options Clearing Corporation, a writer is required to deposit in escrow the
underlying security or other assets in accordance with such rules. The Bond
Funds and the Equity Funds will write only covered call options. This means that
a Fund will only write a call option on a security which a Fund already owns. In
order to comply with the requirements of the securities laws in several states,
a Fund will not write a covered call option if, as a result, the aggregate
market value of all portfolio securities covering call options or currencies
subject to put options exceeds 25% of the market value of the Fund's net assets.

         Portfolio securities on which call options may be written will be
purchased solely on the basis of investment considerations consistent with each
Fund's investment objectives. The

                                      B-6
<PAGE>   141
writing of covered call options is a conservative investment technique believed
to involve relatively little risk (in contrast to the writing of naked or
uncovered options, which a Fund will not do), but capable of enhancing the
Fund's total return. When writing a covered call option, a Fund, in return for
the premium, gives up the opportunity for profit from a price increase in the
underlying security above the exercise price, but conversely retains the risk of
loss should the price of the security decline. Unlike one who owns securities
not subject to an option, a Fund has no control over when it may be required to
sell the underlying securities, since it may be assigned an exercise notice at
any time prior to the expiration of its obligation as a writer. If a call option
which a Fund has written expires, a Fund will realize a gain in the amount of
the premium; however, such gain may be offset by a decline in the market value
of the underlying security during the option period. If the call option is
exercised, a Fund will realize a gain or loss from the sale of the underlying
security. The security covering the call will be maintained in a segregated
account of the Fund's custodian. The Bond Funds and the Equity Funds do not
consider a security covered by a call to be "pledged" as that term is used in
each Fund's policy which limits the pledging or mortgaging of its net assets.

         The premium received is the fair market value of an option. The premium
each Fund will receive from writing a call option will reflect, among other
things, the current market price of the underlying security, the relationship of
the exercise price to such market price, the historical price volatility of the
underlying security, and the length of the option period. Once the decision to
write a call option has been made, the Adviser in determining whether a
particular call option should be written on a particular security, will consider
the reasonableness of the anticipated premium and the likelihood that a liquid
secondary market will exist for those options. The premium received by a Fund
for writing covered call options will be recorded as a liability in the Fund's
statement of assets and liabilities. This liability will be adjusted daily to
the option's current market value, which will be the latest sale price at the
time at which the net asset value per Share of the Fund is computed (close of
the New York Stock Exchange ("NYSE")), or, in the absence of such sale, the
latest asked price. The liability will be extinguished upon expiration of the
option, the purchase of an identical option in the closing transaction, or
delivery of the underlying security upon the exercise of the option.

         Closing transactions will be effected in order to realize a profit on
an outstanding call option, to prevent an underlying security from being called,
or to permit the sale of the underlying security. Furthermore, effecting a
closing transaction will permit a Fund to write another call option on the
underlying security with either a different exercise price or expiration date or
both. If a Fund desires to sell a particular security from its portfolio on
which it has written a call option, it will seek to effect a closing transaction
prior to, or concurrently with, the sale of the security. There is, of course,
no assurance that a Fund will be able to effect such closing transactions at a
favorable price. If a Fund cannot enter into such a transaction, it may be
required to hold a security that it might otherwise have sold, in which case it
would continue to be at market risk on the security. This could result in higher
transaction costs. A Fund will pay transaction costs in connection with the
writing of options to close out previously written options. Such transaction
costs are normally higher than those applicable to purchases and sales of
portfolio securities.

                                      B-7
<PAGE>   142
         Call options written by a Fund will normally have expiration dates of
less than nine months from the date written. The exercise price of the options
may be below, equal to, or above the current market values of the underlying
securities at the time the options are written. From time to time, a Fund may
purchase an underlying security for delivery in accordance with an exercise
notice of a call option assigned to it, rather than delivering such security
from its portfolio. In such cases, additional costs will be incurred.

         A Fund will realize a profit or loss from a closing purchase
transaction if the cost of the transaction is less or more than the premium
received from the writing of the option. Because increases in the market price
of a call option will generally reflect increases in the market price of the
underlying security, any loss resulting from the repurchase of a call option is
likely to be offset in whole or in part by appreciation of the underlying
security owned by the Fund.

         FOREIGN INVESTMENTS
         -------------------

         The Cash Management Fund, the Bond Fund, the Intermediate Bond Fund,
the Short-Term Income Fund, and the Equity Funds may, subject to their
investment objectives, restrictions and policies, invest in certain obligations
or securities of foreign issuers. Permissible investments may consist of
obligations of foreign branches, agencies or subsidiaries of U.S. banks and of
foreign banks, including European Certificates of Deposit, European Time
Deposits, Canadian Time Deposits and Yankee Certificates of Deposit, and
investments in Canadian Commercial Paper, foreign securities and Europaper.
These instruments may subject a Fund to investment risks that differ in some
respects from those related to investments in obligations of U.S. domestic
issuers. Such risks include future adverse political and economic developments,
the possible imposition of withholding taxes on interest or other income,
possible seizure, nationalization, or expropriation of foreign deposits, the
possible establishment of exchange controls or taxation at the source, greater
fluctuations in value due to changes in exchange rates, or the adoption of other
foreign governmental restrictions which might adversely affect the payment of
principal and interest on such obligations. Such investments may also entail
higher custodial fees and sales commissions than domestic investments. Foreign
issuers of securities or obligations are often subject to accounting treatment
and engage in business practices different from those respecting domestic
issuers of similar securities or obligations. Foreign branches of U.S. banks and
foreign banks may be subject to less stringent reserve requirements than those
applicable to domestic branches of U.S. banks. Special U.S. tax considerations
may apply to a Fund's foreign investments.

         Each Equity Fund may also invest in foreign securities through the
purchase of sponsored and unsponsored American Depository Receipts and may also
invest in securities issued by foreign branches of U.S. banks and foreign banks,
in Canadian commercial paper, and in Europaper (U.S. dollar-denominated
commercial paper of a foreign issuer).

         The Bond, Intermediate Bond, and Short-Term Income Funds may also
invest in Canadian, Supra-national, and World Bank Bonds, Eurodollars, and
similar instruments. Investment in foreign securities is subject to special
risks, such as future adverse political and economic developments, possible
seizure, nationalization, or expropriation of foreign

                                      B-8
<PAGE>   143
investments, less stringent disclosure requirements, the possible establishment
of exchange controls or taxation at the source, or the adoption of other foreign
governmental restrictions.

         FUTURES CONTRACTS
         -----------------

         The Bond Funds and the Equity Funds may enter into contracts for the
future delivery of securities and futures contracts based on a specific
security, class of securities or an index, purchase or sell options on any such
futures contracts, and engage in related closing transactions. A futures
contract on a securities index is an agreement obligating either party to pay,
and entitling the other party to receive, while the contract is outstanding,
cash payments based on the level of a specified securities index.

         When interest rates are expected to rise or market values of portfolio
securities are expected to fall, a Fund can seek through the sale of futures
contracts to offset a decline in the value of its portfolio securities. When
interest rates are expected to fall or market values are expected to rise, a
Fund, through the purchase of such contracts, can attempt to secure better rates
or prices for the Fund than might later be available in the market when it
effects anticipated purchases.

         The acquisition of put and call options on futures contracts will,
respectively, give a Fund the right (but not the obligation), for a specified
price, to sell or to purchase the underlying futures contract, upon exercise of
the option, at any time during the option period.

         Futures transactions involve brokerage costs and require a Fund to
segregate assets to cover contracts that would require it to purchase
securities. A Fund may lose the expected benefit of futures transactions if
interest rates or securities prices move in an unanticipated manner. Such
unanticipated changes may also result in poorer overall performance than if the
Fund had not entered into any futures transactions. In addition, the value of a
Fund's futures positions may not prove to be perfectly or even highly correlated
with the value of its portfolio securities, limiting the Fund's ability to hedge
effectively against interest rate and/or market risk and giving rise to
additional risks. There is no assurance of liquidity in the secondary market for
purposes of closing out futures positions.

         Aggregate initial margin deposits for futures contracts, and premiums
paid for related options, may not exceed 5% of an Bond Fund's or an Equity
Fund's total assets, and the value of securities that are the subject of such
futures and options (both for receipt and delivery) may not exceed one-third of
the market value of a Bond Fund's or an Equity Fund's total assets. Futures
transactions will be limited to the extent necessary to maintain each Bond
Funds' or Equity Funds' qualification as a regulated investment company ("RIC").

         INVESTMENT COMPANY SECURITIES
         -----------------------------

         Each Bond Fund and Equity Fund may invest in Shares of other investment
companies, including the American Performance Money Market Funds. However, none
of the Bond Funds or the Equity Funds may invest more than 5% of its total
assets in the securities of any one investment company, nor may any Bond Fund or
any Equity Fund own more than 3% of the

                                      B-9
<PAGE>   144
securities of any investment company or invest more than 10% of its total assets
in the securities of other investment companies. These investment companies
typically pay an investment advisory fee out of their assets. Therefore,
investments may be subject to duplicate management, advisory and distribution
fees. The Adviser will consider this fee in its investment analysis when
determining whether to purchase Shares of these companies for a Bond Fund or an
Equity Fund. This fee is in addition to the fees received by a Bond Fund's or an
Equity Fund's Adviser and Administrator. In order to avoid the imposition of
additional fees as a result of investments by a Bond Fund or an Equity Fund in
Shares of the American Performance Money Market Funds, the Adviser and
Administrator have agreed to promptly forward to the appropriate Bond Fund or
the appropriate Equity Fund any portion of their usual asset-based service fees
from an American Performance Money Market Fund which is attributable to
investment by the appropriate Bond Fund or the appropriate Equity Fund in Shares
of the American Performance Money Market Fund.

         LOAN PARTICIPATION
         ------------------

         The Cash Management Fund may purchase certain loan participation
interests. Loan participation interests represent interests in bank loans made
to corporations. The contractual arrangement with the bank transfers the cash
stream of the underlying bank loan to the participating investor. Because the
issuing bank does not guarantee the participations, they are subject to the
credit risks generally associated with the underlying corporate borrower. The
secondary market, if any, for these loan participations is extremely limited and
any such participations purchased by the investor are regarded as illiquid. In
addition, because it may be necessary under the terms of the loan participation
for the investor to assert through the issuing bank such rights as may exist
against the underlying corporate borrower, in the event the underlying corporate
borrower fails to pay principal, and interest when due, the investor may be
subject to delays, expenses and risks that are greater than those that would
have been involved if the investor had purchased a direct obligation (such as
commercial paper) of such borrower. Moreover, under the terms of the loan
participation the investor may be regarded as a creditor of the issuing bank
(rather than of the underlying corporate borrower), so that the issuer may also
be subject to the risk that the issuing bank may become insolvent. Further, in
the event of the bankruptcy or insolvency of the corporate borrower, the loan
participation may be subject to certain defenses that can be asserted by such
borrower as a result of improper conduct by the issuing bank. The Cash
Management Fund intends to limit investments in loan participation interests to
5% of its total assets.

         MORTGAGE-RELATED SECURITIES
         ---------------------------

         Each of the Funds may, consistent with its investment objective,
restrictions and policies, invest in mortgage-related securities issued or
guaranteed by the U.S. Government, its agencies or instrumentalities. The Equity
Fund, the Growth Equity Fund, the Small Cap Equity Fund, and the Intermediate
Tax-Free Bond Fund will each limit its total investment in such securities to 5%
or less of net assets.

         Mortgage-related securities, for purposes of the Funds' Prospectus and
this Statement of Additional Information, represent pools of mortgage loans
assembled for sale to investors by

                                      B-10
<PAGE>   145
various governmental agencies such as the Government National Mortgage
Association and government-related organizations such as the Federal National
Mortgage Association and the Federal Home Loan Mortgage Corporation, as well as
by nongovernmental issuers such as commercial banks, savings and loan
institutions, mortgage bankers, and private mortgage insurance companies.
Although certain mortgage-related securities are guaranteed by a third party or
otherwise similarly secured, the market value of the security, which may
fluctuate, is not so secured. If a Fund purchases a mortgage-related security at
a premium, that portion may be lost if there is a decline in the market value of
the security whether resulting from changes in interest rates or prepayments in
the underlying mortgage collateral. As with other interest-bearing securities,
the prices of such securities are inversely affected by changes in interest
rates. However, though the value of a mortgage-related security may decline when
interest rates rise, the converse is not necessarily true since in periods of
declining interest rates the mortgages underlying the securities are prone to
prepayment. For this and other reasons, a mortgage-related security's stated
maturity may be shortened by unscheduled prepayments on the underlying mortgages
and, therefore, it is not possible to predict accurately the security's return
to a Fund. In addition, regular payments received in respect of mortgage-related
securities include both interest and principal. No assurance can be given as to
the return a Fund will receive when these amounts are reinvested.

         There are a number of important differences among the agencies and
instrumentalities of the U.S. government that issue mortgage-related securities
and among the securities that they issue. Mortgage-related securities issued by
the Government National Mortgage Association ("GNMA") include GNMA Mortgage
Pass-Through Certificates (also known as "Ginnie Maes") which are guaranteed as
to the timely payment of principal and interest by GNMA and such guarantee is
backed by the full faith and credit of the United States. GNMA is a wholly-owned
U.S. government corporation within the Department of Housing and Urban
Development. GNMA certificates also are supported by the authority of GNMA to
borrow funds from the U.S. government to make payments under its guarantee.
Mortgage-related securities issued by the Federal National Mortgage Association
("FNMA") include FNMA Guaranteed Mortgage Pass-Through Certificates (also known
as "Fannie Maes") which are solely the obligations of the FNMA and are not
backed by or entitled to the full faith and credit of the United States. The
FNMA is a government-sponsored organization owned entirely by private
stock-holders. Fannie Maes are guaranteed as to timely payment of principal and
interest by FNMA. Mortgage-related securities issued by the Federal Home Loan
Mortgage Corporation ("FHLMC") include FHLMC Mortgage Participation Certificates
(also known as "Freddie Macs" or "PCs"). The FHLMC is a corporate
instrumentality of the United States, created pursuant to an Act of Congress,
which is owned entirely by Federal Home Loan Banks. Freddie Macs are not
guaranteed by the United States or by any Federal Home Loan Banks and do not
constitute a debt or obligation of the United States or of any Federal Home Loan
Bank. Freddie Macs entitle the holder to timely payment of interest, which is
guaranteed by the FHLMC. The FHLMC guarantees either ultimate collection or
timely payment of all principal payments on the underlying mortgage loans. When
the FHLMC does not guarantee timely payment of principal, FHLMC may remit the
amount due on account of its guarantee of ultimate payment of principal at any
time after default on an underlying mortgage, but in no event later than one
year after it becomes payable.

                                      B-11
<PAGE>   146
         The U.S. Treasury Fund will invest only in mortgage-related securities
backed by the full faith and credit of the U.S. government.

         The Cash Management Fund and the Balanced Fund also may invest in
collateralized mortgage obligations structured on pools of mortgage pass-through
certificates or mortgage loans. The Cash Management Fund will only invest in
collateralized mortgage obligations which meet the quality requirements of Rule
2a-7 under the 1940 Act. Collateralized mortgage obligations will be purchased
only if rated at the time of purchase in one of the three highest rating
categories by an NRSRO or, if not rated, found by the Adviser under guidelines
established by the Funds' Board of Trustees to be of comparable quality.

         MUNICIPAL SECURITIES
         --------------------

         As a matter of fundamental policy, under normal market conditions, at
least 80% of the net assets of the Intermediate Tax-Free Bond Fund will be
invested in Municipal Securities, the income from which is exempt from federal
income taxes (subject to the possible incidence of any Federal alternative
minimum tax). The Bond Fund, the Intermediate Bond Fund and the Short-Term
Income Fund, under normal market conditions, may invest in Municipal Securities
the income from which is not exempt from federal income taxes. Municipal
Securities include debt obligations issued to obtain funds for various public
purposes, such as the construction of a wide range of public facilities, the
refunding of outstanding obligations, the payment of general operating expenses,
and the extension of loans to other public institutions and facilities. The
Intermediate Tax-Free Bond Fund may purchase short-term tax-exempt General
Obligations Notes, Tax Anticipation Notes, Bond Anticipation Notes, Revenue
Anticipation Notes, Project Notes, and other forms of short-term tax exempt
loans. Such notes are issued with a short-term maturity in anticipation of the
receipt of tax funds, the proceeds of bond placements, or other revenues. In
addition, the Intermediate Tax-Free Bond Fund may invest in other types of
tax-exempt investments, such as municipal bonds, private activity bonds, and
pollution control bonds. The Intermediate Tax-Free Bond Fund may also purchase
tax-exempt commercial paper. While the issuing state or local housing agency has
the primary obligation with respect to its Project Notes, they are also secured
by the full faith and credit of the United States through agreements with the
issuing authority which provide that, if required, the federal government will
lend the issuer an amount equal to the principal of and interest on the Project
Notes.

         The two principal classifications of Municipal Securities which may be
held by the Intermediate Tax-Free Bond Fund are "general obligation" securities
and "revenue" securities. General obligation securities are secured by the
issuer's pledge of its full faith, credit and taxing power for the payment of
principal and interest. Revenue securities are payable only from the revenues
derived from a particular facility or class of facilities or, in some cases,
from proceeds of a special excise tax or other specific revenue source such as
the user of the facility being financed. Private activity bonds held by the
Intermediate Tax-Free Bond Fund are in most cases revenue securities and are not
payable from the unrestricted revenues of the issuer. Consequently, the credit
quality of private activity bonds is usually directly related to the credit
standing of the corporate user of the facility involved.

                                      B-12
<PAGE>   147
         The Intermediate Tax-Free Bond Fund may also invest in "moral
obligation" securities, which are normally issued by special purpose public
authorities. If the issuer of moral obligation securities is unable to meet its
debt service obligations from current revenues, it may draw on a reserve fund,
the restoration of which is a moral commitment, but not a legal obligation of
the state or municipality which created the issuer.

         The Intermediate Tax-Free Bond Fund invests in Municipal Securities
which are rated at the time of purchase within the three highest rating groups
assigned by an NRSRO, in the case of bonds (e.g. at least A by Moody's or S&P);
rated within the highest ratings category assigned by an NRSRO, in the case of
notes (e.g., "SP-1" by S&P or "MIG-1" by Moody's); rated in the highest ratings
category assigned by an NRSRO, in the case of tax-exempt commercial paper (e.g.,
"A-1" or higher by S&P or "Prime-1" by Moody's); or rated in the highest ratings
category assigned by an NRSRO, in the case of variable rate demand obligations,
(e.g., "VMIG-1" by Moody's). The Intermediate Tax-Free Bond Fund may also
purchase Municipal Securities which are unrated at the time of purchase but are
determined to be of comparable quality by the Adviser pursuant to guidelines
approved by the Funds' Board of Trustees. The applicable Municipal Securities
ratings are described in the Appendix.

         There are, of course, variations in the quality of Municipal
Securities, both within a particular classification and between classifications,
and the yields on Municipal Securities depend upon a variety of factors,
including general money market conditions, the financial condition of the
issuer, general conditions of the municipal bond market, the size of a
particular offering, the maturity of the obligations, and the rating of the
issue. The ratings of NRSROs represent their opinions as to the quality of
Municipal Securities. It should be emphasized, however, that ratings are general
and are not absolute standards of quality, and Municipal Securities with the
same maturity, interest rate and rating may have different yields while
Municipal Securities of the same maturity and interest rate with different
ratings may have the same yield. Subsequent to its purchase by the Intermediate
Tax-Free Bond Fund, an issue of Municipal Securities may cease to be rated or
its rating may be reduced below the minimum rating required for purchase by the
Fund. The Fund's Adviser will consider such an event in determining whether the
Fund should continue to hold the obligations.

         Although the Intermediate Tax-Free Bond Fund may invest more than 25%
of its net assets in (i) Municipal Securities whose issuers are in the same
state (ii) Municipal Securities the interest on which is paid solely from
revenues of similar projects, and (iii) private activity bonds, it does not
presently intend to do so on a regular basis. To the extent the Intermediate
Tax-Free Bond Fund's assets are concentrated in Municipal Securities that are
payable from the revenues of similar projects or are issued by issuers located
in the same state, or are concentrated in private activity bonds, the
Intermediate Tax-Free Bond Fund will be subject to the peculiar risks presented
by the laws and economic conditions relating to such states, projects and bonds
to a greater extent than it would be if its assets were not so concentrated.

         The Intermediate Tax-Free Bond Fund may invest in short-term Municipal
Securities up to 100% of its assets during temporary defensive periods.

                                      B-13
<PAGE>   148
         An issuer's obligations under its Municipal Securities are subject to
the provisions of bankruptcy, insolvency, and other laws affecting the rights
and remedies of creditors, such as the federal bankruptcy code, and laws, if
any, which may be enacted by Congress or state legislatures extending the time
for payment of principal or interest, or both, or imposing other constraints
upon the enforcement of such obligations. The power or ability of an issuer to
meet its obligations for the payment of interest on and principal of its
Municipal Securities may be materially adversely affected by litigation or other
conditions.

         OPTIONS
         -------

         The Bond Funds and the Equity Funds may purchase call options. A call
option gives the purchaser of the option the right to buy, and a writer has the
obligation to sell, the underlying security at the stated exercise price at any
time prior to the expiration of the option, regardless of the market price of
the security. The premium paid to the writer is consideration for undertaking
the obligations under the option contract. Call options purchased by the
foregoing Funds will be valued at the last sale price, or in the absence of such
a price, at the mean between bid and asked price.

         The Bond Funds and the Equity Funds may also purchase index options.
Index options (or options on securities indices) are similar in many respects to
options on securities, except that an index option gives the holder the right to
receive, upon exercise, cash instead of securities, if the closing level of the
securities index upon which the option is based is greater than the exercise
price of the option.

         Purchasing options is a specialized investment technique that entails a
substantial risk of a complete loss of the amounts paid as premiums to writers
of options. Each of the Bond Funds and Equity Funds will purchase call options
and index options only when its total investment in such options immediately
after such purchase, will not exceed 5% of its total assets.

         PRIVATE PLACEMENT INVESTMENTS
         -----------------------------

         The Cash Management Fund, the Bond Funds, and the Equity Funds may
invest in commercial paper issued in reliance on the so-called "private
placement" exemption from registration afforded by Section 4(2) of the
Securities Act of 1933, and resold to qualified institutional buyers under
Securities Act Rule 144A ("Section 4(2) paper"). Section 4(2) paper is
restricted as to disposition under the federal securities laws, and generally is
sold to institutional investors such as the Funds who agree that they are
purchasing the paper for investment and not with a view to public distribution.
Any resale by the purchaser must be in an exempt transaction and may be
accomplished in accordance with Rule 144A. Section 4(2) paper normally is resold
to other institutional investors like the Funds through or with the assistance
of the issuer or investment dealers who make a market in the Section 4(2) paper,
thus providing liquidity. The Bond Funds and the Equity Funds will not invest
more than 15% of their net assets and the Cash Management Fund will not invest
more than 10% of its net assets in Section 4(2) paper and illiquid securities
unless the Adviser determines, by continuous reference to the appropriate
trading markets and pursuant to guidelines approve by the Board of Trustees,
that any Section 4(2) paper held by a Fund in excess of this level is at all
times liquid.

                                      B-14
<PAGE>   149
         Because it is not possible to predict with assurance exactly how this
market for Section 4(2) paper sold and offered under Rule 144A will develop, the
Board of Trustees and the Adviser, pursuant to the guidelines approved by the
Board of Trustees, will carefully monitor the Funds' investments in these
securities, focusing on such important factors, among others, as valuation,
liquidity, and availability of information. Investments in Section 4(2) paper
could have the effect of reducing a Fund's liquidity to the extent that
qualified institutional buyers become for a time not interested in purchasing
these restricted securities.

         PUTS
         ----

         The Cash Management Fund, the Bond Funds, and the Equity Funds may
acquire "puts" with respect to securities held in their portfolios. A put is a
right to sell a specified security (or securities) within a specified period of
time at a specified exercise price. The Cash Management Fund may sell, transfer,
or assign a put only in conjunction with the sale, transfer, or assignment of
the underlying security or securities.

         The amount payable to a Fund upon its exercise of a "put" on debt
securities is normally (i) the Fund's acquisition cost of the securities
(excluding any accrued interest which the portfolio paid on their acquisition),
less any amortized market premium or plus any amortized market or original issue
discount during the period the Fund owned the securities, plus (ii) all interest
accrued on the securities since the last interest payment date during that
period.

         Puts may be acquired by a Fund to facilitate the liquidity of its
portfolio assets. Puts may also be used to facilitate the reinvestment of a
Fund's assets at a rate of return more favorable than that of the underlying
security or to limit the potential losses involved in a decline in an equity
security's market value.

         Each Fund intends to enter into puts only with dealers, banks, and
broker-dealers which, in the Adviser's opinion, present minimal credit risks.

                                      B-15
<PAGE>   150
         REPURCHASE AGREEMENTS
         ---------------------

         Securities held by each of the Funds may be subject to repurchase
agreements. Under the terms of a repurchase agreement, a Fund would acquire
securities from a financial institution such as a member bank of the Federal
Deposit Insurance Corporation or a registered broker-dealer, which the Adviser
deems creditworthy under guidelines approved by the Board of Trustees, subject
to the seller's agreement to repurchase such securities at a mutually
agreed-upon date and price. The repurchase price would generally equal the price
paid by the Fund plus interest negotiated on the basis of current short-term
rates, which may be more or less than the rate on the underlying portfolio
securities. The seller under a repurchase agreement will be required to maintain
the value of collateral held pursuant to the agreement at not less than the
repurchase price (including accrued interest). If the seller were to default on
its repurchase obligation or become insolvent, a Fund would suffer a loss to the
extent that the proceeds from a sale of the underlying portfolio securities were
less than the repurchase price under the agreement, or to the extent that the
disposition of such securities by the Fund were delayed pending court action.
Additionally, there is no controlling legal precedent confirming that a Fund
would be entitled, as against a claim by such seller or its receiver or trustee
in bankruptcy, to retain the underlying securities, although the Board of
Trustees of the Funds believes that, under the regular procedures normally in
effect for custody of each Fund's securities subject to repurchase agreements
and under applicable federal laws, a court of competent jurisdiction would rule
in favor of a Fund if presented with the question. Securities subject to
repurchase agreements will be held by each Fund's Custodian, Sub-Custodian, or
in the Federal Reserve/Treasury book-entry system. Repurchase agreements are
considered to be loans by an investment company under the 1940 Act.

         REVERSE REPURCHASE AGREEMENTS
         -----------------------------

         Each Fund may borrow funds for temporary purposes by entering into
reverse repurchase agreements in accordance with the investment restrictions
described below. Pursuant to such agreements, a Fund would sell portfolio
securities to financial institutions such as banks and broker-dealers and agree
to repurchase them at a mutually agreed upon date and price. At the time a Fund
enters into a reverse repurchase agreement, it will place in a segregated
custodial account assets, such as liquid high quality debt securities,
consistent with the Fund's investment objective having a value not less than
100% of the repurchase price (including accrued interest), and will subsequently
monitor the account to ensure that such required value is maintained. Reverse
repurchase agreements involve the risk that the market value of the securities
sold by a Fund may decline below the price at which such Fund is obligated to
repurchase the securities. Reverse repurchase agreements are considered to be
borrowings by an investment company under the 1940 Act.

                                      B-16
<PAGE>   151
         SECURITIES LENDING
         ------------------

         Each of the Funds may lend its portfolio securities to broker-dealers,
banks or institutional borrowers of securities. A Fund must receive 100%
collateral in the form of cash, U.S. government securities, or other high
quality debt instruments. This collateral must be valued daily by the Fund's
Adviser and should the market value of the loaned securities increase, the
borrower must furnish additional collateral to the Fund. During the time
portfolio securities are on loan, the borrower will pay the Fund any dividends
or interest paid on such securities. Loans will be subject to termination by a
Fund or the borrower at any time. While a Fund will not have the right to vote
securities in loan, it intends to terminate the loan and regain the right to
vote if that is considered important with respect to the investment. A Fund will
only enter into loan arrangements with broker-dealers, banks or other
institutions which the Adviser has determined are creditworthy under guidelines
established by the Funds' Board of Trustees. Each Fund will limit securities
loans to 33 "% of the value of its total assets.

         U.S. GOVERNMENT OBLIGATIONS
         ---------------------------

         The U.S. Treasury Fund invests exclusively in obligations issued or
guaranteed by the U.S. government, some of which may be subject to repurchase
agreements. All of the other Funds may invest in obligations issued or
guaranteed by the U.S. government, its agencies or instrumentalities, some of
which may be subject to repurchase agreements. Obligations of certain agencies
and instrumentalities of the U.S. government are supported by the full faith and
credit of the U.S. government; others are supported by the right of the issuer
to borrow from the government; others are supported by the discretionary
authority of the U.S. government to purchase the agency's obligations; and still
others are supported only by the credit of the instrumentality. No assurance can
be given that the U.S. government would provide financial support to U.S.
government-sponsored agencies or instrumentalities if it is not obligated to do
so by law. A Fund (excluding however, the U.S. Treasury Fund) will invest in the
obligations of such agencies or instrumentalities only when the Adviser believes
that the credit risk with respect thereto is minimal.

VARIABLE AMOUNT AND FLOATING RATE NOTES
---------------------------------------

         Variable amount and floating rate notes: Commercial paper eligible for
investment by the Cash Management Fund, the Bond Funds, and the Equity Funds may
include variable amount and floating rate notes. A variable rate note is one
whose terms provide for the readjustment of its interest rate on set dates and
which, upon such readjustment, can reasonably be expected to have a fair market
value that approximates its par value. A floating rate note is one whose terms
provide for the readjustment of its interest rate whenever a specified interest
rate changes and which, at any time, can reasonably be expected to have a market
value that approximates its par value. Such notes are frequently not rated by
credit rating agencies; however, unrated variable and floating rate notes
purchased by a Fund will be determined by the Adviser or under guidelines
established by the Funds' Board of Trustees to be of comparable quality, at the
time of purchase, to rated instruments which are eligible for purchase under the
Fund's investment policies. In making such determinations, the Adviser will
consider the earning power, cash flow and other liquidity ratios of the issuers
of such notes (such issuers include financial,

                                      B-17
<PAGE>   152
merchandising, bank holding and other companies) and will monitor their
financial condition. Although there may be no active secondary market with
respect to a particular variable or floating rate note purchased by a Fund, the
Fund may re-sell the note at any time to a third party. The absence of such an
active secondary market, however, could make it difficult for the Fund to
dispose of the variable or floating rate note involved in the event the issuer
of the note defaulted on its payment obligations, and the Fund could, for this
or other reasons, suffer a loss to the extent of the default. Variable or
floating rate notes may be secured by bank letters of credit or drafts.

         Municipal Securities purchased by the Intermediate Tax-Free Bond Fund
may include rated and unrated variable and floating rate tax-exempt notes. There
may be no active secondary market with respect to a particular variable or
floating rate note. Nevertheless, the periodic readjustments of their interest
rates tend to assure that their value to the Intermediate Tax-Free Bond Fund
will approximate their par value.

         Variable amount master demand notes in which the Cash Management Fund
may invest are unsecured demand notes that permit the indebtedness thereunder to
vary, and provide for periodic adjustments in the interest rate according to the
terms of the instrument. Because master demand notes are direct lending
arrangements between the Cash Management Fund and the issuer, they are not
normally traded. Although there is no secondary market for the notes, the Cash
Management Fund may demand payment of principal and accrued interest at any
time. The period of time remaining until the principal amount actually can be
recovered under a variable amount master demand note generally shall not exceed
seven days. To the extent such maximum period were exceeded, the note in
question would be considered illiquid. While the notes are not typically rated
by credit rating agencies, issuers of variable amount master demand notes (which
are normally manufacturing, retail, financial, and other business concerns) must
satisfy the same criteria as set forth above for commercial paper. The Cash
Management Fund will invest in variable amount master demand notes only where
such notes are determined by its Adviser pursuant to guidelines established by
the Funds' Board of Trustees to be of comparable quality to rated issuers or
instruments eligible for investment by the Cash Management Fund. The Adviser
will consider the earning power, cash flow, and other liquidity ratios of the
issuers of such notes and will continuously monitor their financial status and
ability to meet payment on demand. In determining average dollar-weighted
portfolio maturity, a variable amount master demand note will be deemed to have
a maturity equal to the longer of the period of time remaining until the next
readjustment of the interest rate or the period of time remaining until the
principal amount can be recovered from the issuer through demand.

         Variable or floating rate notes with stated maturities of more than one
year may, based on the amortized cost valuation technique pursuant to Rule 2a-7
under the 1940 Act, be deemed to have shorter maturities in accordance with such
Rule.

                                      B-18
<PAGE>   153
         WHEN-ISSUED SECURITIES
         ----------------------

         Each Fund may purchase securities on a when-issued basis. When-issued
securities are securities purchased for delivery beyond the normal settlement
date at a stated price and yield and thereby involve a risk that the yield
obtained in the transaction will be less than those available in the market when
delivery takes place. A Fund relies on the seller to consummate the trade and
will generally not pay for such securities or start earning interest on them
until they are received. When a Fund agrees to purchase such securities, its
Custodian will set aside cash or liquid high grade securities equal to the
amount of the commitment in a separate account with the Custodian or a
Sub-Custodian of the Fund. Failure of the seller to consummate the trade may
result in the Fund incurring a loss or missing an opportunity to obtain a price
considered to be advantageous. Securities purchased on a when-issued basis are
recorded as an asset and are subject to changes in value based upon changes in
the general level of interest rates. Each Fund expects that commitments to
purchase when-issued securities will not exceed 25% of the value of its total
assets absent unusual market conditions. In the event that its commitments to
purchase when-issued securities ever exceed 25% of the value of its assets, a
Fund's liquidity and the ability of the Adviser to manage it might be severely
affected. No Fund intends to purchase when-issued securities for speculative
purposes but only in furtherance of its investment objective.

         ZERO COUPON OBLIGATIONS
         -----------------------

         The Bond, the Intermediate Bond, and the Short-Term Income Funds may
hold zero-coupon obligations issued by the U.S. Treasury and U.S. government
agencies. Such zero-coupon obligations pay no current interest and are typically
sold at prices greatly discounted from par value, with par value to be paid to
the holder at maturity. The return on a zero-coupon obligation, when held to
maturity, equals the difference between the par value and the original purchase
price. Zero-coupon obligations have greater price volatility than coupon
obligations and such obligations will be purchased only if, at the time of
purchase, the yield spread, considered in light of the obligation's duration, is
considered advantageous.

         Even though such bonds do not pay current interest in cash, a Fund
nonetheless is required to accrue interest income on these investments and to
distribute the interest income on a current basis. Thus, a Fund could be
required at times to liquidate other investments in order to satisfy its
distribution requirements.

TEMPORARY DEFENSIVE POSITIONS
-----------------------------

         During temporary defensive periods as determined by the Adviser, the
Bond Fund, the Intermediate Bond Fund, the Short-Term Income Fund, and the
Equity Funds may hold up to 100% of its total assets in cash equivalents. The
Intermediate Tax-Free Bond Fund may invest in short-term Municipal Securities up
to 100% of its assets during temporary defensive periods.

                                      B-19
<PAGE>   154
INVESTMENT RESTRICTIONS
-----------------------

         Unless otherwise specifically noted, the following investment
restrictions may be changed with respect to a particular Fund only by a vote of
a majority of the outstanding Shares of that Fund.

         None of the Funds may:

         1. Purchase securities on margin, sell securities short, or participate
on a joint or joint and several basis in any securities trading account, except,
in the case of the Intermediate Tax-Free Bond Fund, for use of short-term credit
necessary for clearance of purchases of portfolio securities.

         2. Underwrite the securities of other issuers except to the extent that
a Fund may be deemed to be an underwriter under certain securities laws in the
disposition of "restricted securities."

         3. Purchase or sell commodities or commodity contracts, except that
each of the Bond Funds and the Equity Funds may invest in futures contracts if,
immediately thereafter, the aggregate initial margin deposits for futures
contracts, and premium paid for related options, does not exceed 5% of the
Fund's total assets and the value of securities that are the subject of such
futures and options (both for receipt and delivery) does not exceed one-third of
the value of the Fund's total assets.

         4. Purchase participation or other direct interests in oil, gas or
mineral exploration or development programs or leases (although investments by
the Cash Management Fund, the Bond Funds, and the Equity Funds in marketable
securities of companies engaged in such activities are not hereby precluded).

         5. Invest in any issuer for purposes of exercising control or
management.

         6. Purchase or retain securities of any issuer if the officers or
Trustees of the Funds or the officers or directors of its Adviser owning
beneficially more than one-half of 1% of the securities of such issuer together
own beneficially more than 5% of such securities.

         7. Invest more than 5% of a Fund's total assets in the securities of
issuers which together with any predecessors have a record of less than three
years of continuous operation.

         8. Purchase or sell real estate, including limited partnership
interests, (however, each Fund, except a Money Market Fund, may, to the extent
appropriate to its investment objective, purchase securities secured by real
estate or interests therein or securities issued by companies investing in real
estate or interests therein).

         9. Except with respect to the Growth Equity Fund, and the Small Cap
Equity Fund, for as long as Shares of a Fund are registered in Arkansas and for
so long as the State of Arkansas so requires, invest more than 10% of a Fund's
total assets in the securities of issuers

                                      B-20
<PAGE>   155
which are restricted as to disposition, other than restricted securities
eligible for resale pursuant to Rule 144A under the Securities Act of 1933. As
of the date of this SAI, the State of Arkansas did not require this restriction.

         In addition, the Money Market Funds may not:

         1. Buy common stocks or voting securities, or state, municipal, or
private activity bonds.

         2. Purchase securities of any one issuer, other than obligations issued
or guaranteed by the U.S. government (and, with respect to the Cash Management
Fund, other than obligations issued or guaranteed by the U.S. government or its
agencies or instrumentalities) if, as a result, with respect to 75% of its
portfolio, more than 5% of the value of each Fund's total assets would be
invested in such issuer.(1)

         3. Borrow money or issue senior securities, except that each Fund may
borrow from banks and enter into reverse repurchase agreements for temporary
purposes in amounts up to 10% of the value of its total assets at the time of
such borrowing; or mortgage, pledge, or hypothecate any assets, except in
connection with any such borrowing and in amounts not in excess of the lesser of
the dollar amounts borrowed or 10% of the value of such Fund's total assets at
the time of its borrowing. Neither Fund will purchase securities while its
borrowings (including reverse repurchase agreements) exceed 5% of the total
assets of such Fund.

         4. Make loans, except that each Fund may purchase or hold debt
instruments in accordance with its investment objective and policies, may lend
portfolio securities in accordance with its investment objective and policies,
and may enter into repurchase agreements.

         5. Enter into repurchase agreements with maturities in excess of seven
days if such investment, together with other instruments in such Fund which are
not readily marketable, exceeds 10% of such Fund's net assets.

         6. Invest in securities of other investment companies except as they
may be acquired as part of a merger, consolidation, reorganization, or
acquisition of assets.

         The U.S. Treasury Fund may not:

         1. Purchase securities other than U.S. Treasury bills, notes and other
obligations backed by the full faith and credit of the U.S. government, some of
which may be subject to repurchase agreements.

--------------------
(1) In addition, although not a fundamental investment restriction (and
therefore subject to change without a Shareholder vote), to the extent required
by rules of the Securities and Exchange Commission the U.S. Treasury Fund and
the Cash Management Fund each generally apply the above restriction with respect
to 100% of their portfolios.

                                      B-21
<PAGE>   156
         2. Purchase any securities which would cause more than 25% of the value
of each Fund's total assets at the time of purchase to be invested in securities
of one or more issuers conducting their principal business activities in the
same industry, provided that (a) there is no limitation with respect to
obligations issued or guaranteed by the U.S. government or its agencies or
instrumentalities, obligations issued by commercial banks and bank holding
companies, repurchase agreements secured by bank instruments or obligations of
the U.S. government or its agencies or instrumentalities and obligations issued
by commercial banks and bank holding companies primarily engaged in the banking
industry; (b) wholly-owned finance companies will be considered to be in the
industries of their parents if their activities are primarily related to
financing the activities of their parents; and (c) utilities will be divided
according to their services. For example, gas, gas transmission, electric and
gas, electric, and telephone will each be considered a separate industry.

         The Cash Management Fund may not:

         1. Write or sell puts, calls, straddles, spreads or combinations
thereof except that the Cash Management Fund may acquire puts with respect to
obligations in its portfolio and sell those puts in conjunction with a sale of
those obligations.

         2. Acquire a put, if, immediately after such acquisition, over 5% of
the total value of the Cash Management Fund's assets would be subject to puts
from such issuer (except that the 5% limitation is inapplicable to puts that, by
their terms, would be readily exercisable in the event of a default in payment
of principal or interest on the underlying securities). For the purpose of this
investment restriction and the investment restriction immediately below, a put
will be considered to be from the party to whom the Cash Management Fund will
look for payment of the exercise price.

         3. Acquire a put that, by its terms, would be readily exercisable in
the event of a default in payment of principal and interest on the underlying
security or securities if immediately after that acquisition the value of the
security or securities underlying that put, when aggregated with the value of
any other securities issued or guaranteed by the issuer of the put, would exceed
10% of the total value of the Cash Management Fund's assets.

         4. Purchase any securities which would cause more than 25% of the value
of the Fund's total assets at the time of purchase to be invested in securities
of one or more issuers conducting their principal business activities in the
same industry, provided that (a) there is no limitation with respect to
obligations issued or guaranteed by the U.S. government or its agencies or
instrumentalities, repurchase agreements secured by obligations of the U.S.
government or its agencies or instrumentalities, bank certificates of deposits,
bankers' acceptances, and repurchase agreements secured by bank instruments
(such bank certificates of deposits, bankers' acceptances, and repurchase
agreements secured by bank instruments may be issued or guaranteed by U.S. banks
and U.S. branches of foreign banks); (b) wholly-owned finance companies will be
considered to be in the industries of their parents if their activities are
primarily related to financing the activities of their parents; and (c)
utilities will be divided according to their services.

                                      B-22
<PAGE>   157
         The Intermediate Tax-Free Bond Fund may not:

         1. Invest in private activity bonds where the payment of principal and
interest are the responsibility of a company (including its predecessors) with
less than three years of continuous operation.

         2. Acquire a put, if, immediately after such acquisition, over 5% of
the total value of the Intermediate Tax-Free Bond Fund's assets would be subject
to puts from such issuer (except that the 5% limitation is inapplicable to puts
that, by their terms, would be readily exercisable in the event of a default in
payment of principal or interest on the underlying securities). For the purpose
of this investment restriction and Investment Restriction Number 3 below, a put
will be considered to be from the party to whom the Intermediate Tax-Free Bond
Fund will look for payment of the exercise price.

         3. Acquire a put that, by its terms, would be readily exercisable in
the event of a default in payment of principal and interest on the underlying
security or securities if immediately after that acquisition the value of the
security or securities underlying that put, when aggregated with the value of
any other securities issued or guaranteed by the issuer of the put, would exceed
10% of the total value of the Intermediate Tax-Free Bond Fund's assets.

         The Bond Funds and the Equity Funds may not:

         1. Purchase a security if, as a result, with respect to 75% of its
portfolio (i) more than 5% of the value of its total assets would be invested in
any one issuer, or (ii) it would hold more than 10% of any class of securities
of such issuer. There is no limit on the percentage of assets that may be
invested in U.S. Treasury bills, notes, or other obligations issued or
guaranteed by the U.S. government or its agencies and instrumentalities. For
purposes of this and the immediately following limitation, a security is
considered to be issued by the government entity (or entities) whose assets and
revenues back the security, or, with respect to a private activity bond that is
backed only by the assets and revenues of a non-governmental user, such
non-governmental user.

         2. Purchase a security if, as a result, more than 25% of the value of
its total assets would be invested in securities of one or more issuers
conducting their principal business activities in the same industry, provided
that (a) this limitation shall not apply to obligations issued or guaranteed by
the U.S. government or its agencies and instrumentalities; (b) wholly owned
finance companies will be considered to be in the industries of their parents if
their activities are primarily related to financing the activities of their
parents; (c) utilities will be divided according to their services (for example,
gas, gas transmission, electric and gas, electric, and telephone will each be
considered a separate industry); and (d) with respect to the Bond Funds, this
limitation shall not apply to Municipal Securities or governmental guarantees of
Municipal Securities; and further, that for the purpose of this limitation only,
private activity bonds that are backed only by the assets and revenues of a
non-governmental user shall not be deemed to be Municipal Securities.

                                      B-23
<PAGE>   158
         3. Borrow money or issue senior securities, except that each Fund may
borrow from banks or enter into reverse repurchase agreements for temporary
purposes in amounts up to 10% of the value of its total assets at the time of
such borrowing; or mortgage, pledge, or hypothecate any assets, except in
connection with any such borrowing and in amounts not in excess of the lesser of
the dollar amounts borrowed or 10% of the value of each Fund's total assets at
the time of its borrowing. No Fund will purchase securities while its borrowings
(including reverse repurchase agreements) exceed 5% of its total assets.

         4. Make loans, except that each Fund may, in accordance with its
investment objectives and policies, purchase or hold debt instruments, lend
portfolio securities, and enter into repurchase agreements.

         5. Enter into a repurchase agreement with a maturity in excess of seven
days if such investment, together with other instruments in the Fund which are
not readily marketable, exceeds 10% of such Fund's net assets.

         If a percentage restriction is satisfied at the time of investment, a
later increase or decrease in such percentage resulting from a change in asset
value will not constitute a violation of such restriction.

PORTFOLIO TURNOVER
------------------

         The portfolio turnover rate for each Fund is calculated by dividing the
lesser of purchases or sales of portfolio securities for the year by the monthly
average value of the portfolio securities. The calculation excludes all
securities whose maturities, at the time of acquisition, were one year or less.
Thus, for regulatory purposes, the portfolio turnovers with respect to the Money
Market Funds will be zero. Fund turnover may vary greatly from year to year as
well as within a particular year, and may also be affected by cash requirements
for redemptions of Shares and by requirements which enable the Funds to receive
certain favorable tax treatments. Fund turnover will not be a limiting factor in
making portfolio decisions. High turnover rates will generally result in higher
transaction costs to a Fund and may result in additional tax consequences
(including an increase in short-term capital gains which are generally taxed to
individual Shareholders at ordinary income tax rates) to a Fund's Shareholders.

ADDITIONAL TAX INFORMATION CONCERNING ALL THE FUNDS
---------------------------------------------------

         It is the policy of each of the Funds to meet the requirements of
Subchapter M of the Internal Revenue Code of 1986, as amended (the "Code"). By
following such policy, each Fund expects to eliminate or reduce to a nominal
amount the federal income taxes to which it may be subject.

         In order to qualify as a regulated investment company (a "RIC") under
Subchapter M each Fund must, among other things, (1) derive at least 90% of its
gross income from dividends, interest, payments with respect to securities
loans, and gains from the sale or other disposition of stock or securities,
foreign currencies or other income (including gains from options, futures or
forward contracts) derived with respect to its business of investing in stock,
securities or

                                      B-24
<PAGE>   159
currencies, and (2) diversify its holdings so that at the end of each quarter of
its taxable year (i) at least 50% of the market value of the Fund's assets is
represented by cash or cash items, U.S. government securities, securities of
other RICs and other securities limited, in respect of any one issuer, to an
amount not greater than 5% of the value of the Fund's assets and 10% of the
outstanding voting securities of such issuer, and (ii) not more than 25% of the
value of its assets is invested in the securities of any one issuer (other than
U.S. government securities or securities of other RICs) or of two or more
issuers that the Fund controls and that are engaged in the same, similar or
related trades or businesses. These requirements may limit the range of the
Fund's investments. If a Fund qualifies as a RIC, it will not be subject to
federal income tax on the part of its net investment income and net realized
capital gains, if any, that it distributes to Shareholders, provided the Fund
distributes during its taxable year at least 90% of the sum of its taxable net
investment income, its net tax-exempt income and the excess, if any, of net
short-term capital gains over net long-term capital losses for such year. Each
Fund intends to make sufficient distributions to Shareholders to meet this
requirement.

         If a Fund fails to qualify as a RIC accorded special tax treatment in
any taxable year, the Fund will be subject to tax on its income at corporate
rates, and could be required to recognize unrealized gains, pay substantial
taxes and interest and to make substantial distributions before requalifying as
a RIC that is accorded special tax treatment.

         Distributions from a Fund (other than exempt-interest dividends, as
discussed below) generally will be taxable to Shareholders as ordinary income to
the extent derived from the Fund's investment income and short-term capital
gains. Distributions of long-term capital gains will be taxable to Shareholders
as such, regardless of how long a Shareholder has held Shares of the Fund.
Distributions will be taxable to Shareholders whether received in cash or
additional Shares.

         Dividends and distributions on a Fund's Share generally subject to
federal income tax as described herein to the extent they do not exceed the
Fund's realized income and gains, even though such dividends and distributions
may economically represent a return of a particular Shareholder's investment.
Such distributions are likely to occur in respect of Shares purchased at a time
when a Fund's net asset value reflects gains that are either unrealized, or
realized but not distributed. Such realized gains may be required to be
distributed even when a Fund's net asset value also reflects unrealized losses.

         The Code imposes a non-deductible 4% excise tax on RICs that do not
distribute in each calendar year (regardless of whether they otherwise have a
non-calendar taxable year) an amount at least equal to the sum of 98% of their
"ordinary income" (as defined) for the calendar year plus 98% of their capital
gain net income for the one-year period ending on October 31 of such calendar
year, plus any undistributed amounts from the prior year. For the foregoing
purposes, a Fund is treated as having distributed any amount on which it is
subject to income tax for any taxable year ending in such calendar year. A
dividend paid to Shareholders by a Fund in January of a year generally is deemed
to have been paid by the Fund on December 31 of the preceding year, if the
dividend was declared and payable to Shareholders of record on a date in
October, November or December of that preceding year. If distributions during a
calendar year by a Fund did not meet the 98% threshold, that particular Fund
would be subject to this 4% excise tax on

                                      B-25
<PAGE>   160
the undistributed amounts. Each Fund generally intends to make distributions
sufficient to avoid the imposition of this 4% excise tax.

         A Fund's transactions in futures contracts, options, and foreign
currency denominated securities, and certain other investment and hedging
activities of the Fund, will be subject to special tax rules. These rules may
accelerate income to the Fund, defer losses to the Fund, cause adjustments in
the holding periods of the Fund's assets, convert short-term capital losses into
long-term capital losses, convert long-term capital gains into short-term
capital gains, or otherwise affect the character of the Fund's income.
Consequently, the amount, timing, and character of distributions to Shareholders
could be affected. Income earned as a result of these transactions would, in
general, not be eligible for the dividends-received deduction or for treatment
as exempt-interest dividends when distributed to Shareholders. Each Fund will
endeavor to make any available elections pertaining to these transactions in a
manner believed to be in the best interest of the Fund.

         If a Shareholder sells Shares, such Shareholder will generally
recognize gain or loss in an amount equal to the difference between the adjusted
tax basis in the Shares and the amount received. If such Shareholder holds
Shares as capital assets, the gain or loss will be a capital gain or loss. For
taxable years beginning after December 31, 2000, the maximum capital gain tax
rate for capital assets (including Fund Shares) held by a non-corporate
Shareholder for more than 5 years will be 8 percent and 18 percent (rather than
10 percent and 20 percent). The 18-percent rate applies only to assets the
holding period for which begins after December 31, 2000 (including by way of an
election to mark the asset to the market, and to pay the tax on any gain
thereon, as of January 2, 2001). The mark-to-market election may be
disadvantageous from a federal tax perspective, and Shareholders should consult
their tax advisors before making such an election.

         Any loss on the sale of Shares will be treated as a long-term capital
loss to the extent of any capital gain dividends received with respect to those
Shares. For purposes of determining whether Shares have been held for six months
or less, the holding period is suspended for any periods during which a
Shareholder's risk of loss is diminished as a result of holding one or more
other positions in substantially similar or related property, or through certain
options or short sales. In addition, any loss realized on a sale or exchange of
Shares will be disallowed to the extent that a Shareholder replaces the disposed
of Shares with other Shares within a period of 61 days beginning 30 days before
and ending 30 days after the date of disposition. In such an event, the
Shareholder's basis in the replacement Shares will be adjusted to reflect the
disallowed loss.

         If Shareholders borrow money to buy Fund Shares, they may not deduct
the interest on that loan. Under Internal Revenue Service rules, Fund Shares may
be treated as having been bought with borrowed money even if the purchase of the
Fund Shares cannot be traced directly to borrowed money.

         The foregoing is only a summary of some of the important federal tax
considerations generally affecting purchasers of Shares of each Fund. Further
tax information regarding the Intermediate Tax-Free Bond Fund is included in the
next section of this Statement of Additional Information. No attempt is made to
present a detailed explanation of the federal income tax

                                      B-26
<PAGE>   161
treatment of each Fund or its Shareholders, and this discussion is not intended
as a substitute for careful tax planning. Accordingly, potential purchasers of
Shares of a Fund are urged to consult their tax advisers with specific reference
to their own tax situation, including the potential application of foreign,
state and local taxes.

         The foregoing discussion and the discussion below regarding the
Intermediate Tax-Free Bond Fund are based on tax laws and regulations which are
in effect on the date of this Statement of Additional Information; such laws and
regulations may be changed by legislative or administrative action, and such
changes may be retroactive.

ADDITIONAL TAX INFORMATION CONCERNING THE INTERMEDIATE TAX-FREE BOND FUND
-------------------------------------------------------------------------

         The Code permits a RIC which invests at least 50% of its assets in
tax-free Municipal Securities and other securities exempt from the regular
federal income tax to pass through to its investors, tax-free, net interest
income from such securities.

         The policy of the Intermediate Tax-Free Bond Fund is to pay each year
as dividends substantially all the Fund's interest income net of certain
deductions. An exempt-interest dividend is any dividend or part thereof (other
than a capital gain dividend) paid by the Intermediate Tax-Free Bond Fund and
designated as an exempt-interest dividend in a written notice mailed to
Shareholders after the close of the Fund's taxable year. Such dividends will not
exceed, in the aggregate, the net interest the Fund receives during the taxable
year from Municipal Securities and other securities exempt from the regular
federal income tax. The percentage of the total dividends paid for any taxable
year which qualifies as federal exempt-interest dividends will be the same for
all Shareholders receiving dividends from the Intermediate Tax-Free Bond Fund
during such year, regardless of the period for which the Shares were held.

         Exempt-interest dividends may be treated by the Intermediate Tax-Free
Bond Fund's Shareholders as items of interest excludable from their gross income
under Section 103(a) of the Code. However, each Shareholder of an Intermediate
Tax-Free Bond Fund is advised to consult his or her tax adviser with respect to
whether exempt-interest dividends would retain the exclusion under Section
103(a) if such Shareholder were treated as a "substantial user" or a "related
person" to such user under Section 147(a) with respect to facilities financed
through any of the tax-exempt obligations held by the Fund. "Substantial user"
is defined under U.S. Treasury Regulations to include any non-exempt person who
regularly uses a part of such facilities in his or her trade or business and
(a)(i) whose gross revenues derived with respect to the facilities financed by
the issuance of bonds are more than 5% of the total revenues derived by all
users of such facilities or (ii) who occupies more than 5% of the usable area of
the facility or (b) for whom such facilities or a part thereof were specifically
constructed, reconstructed or acquired. "Related persons" include certain
related natural persons, affiliated corporations, partners and partnerships.

         Dividends attributable to interest on certain private activity bonds
issued after August 7, 1986 must be included in alternative minimum taxable
income for purposes of determining

                                      B-27
<PAGE>   162
liability (if any) for the alternative minimum tax for individuals and
corporations. In the case of corporations, all tax-exempt interest dividends
will be taken into account in determining adjusted current earnings for the
purpose of computing the alternative minimum tax.

         The Intermediate Tax-Free Bond Fund may acquire rights regarding
specified portfolio securities under puts. (See "INVESTMENT OBJECTIVE AND
POLICIES - Additional Information on Fund Instruments - Puts" above for further
information.) The policy of the Intermediate Tax-Free Bond Fund is to limit its
acquisition of puts to those under which the Fund will be treated for federal
income tax purposes as the owner of the Municipal Securities acquired subject to
the put and the interest on the Municipal Securities will be tax-exempt to the
Fund. Although the Internal Revenue Service has issued a published ruling that
provides some guidance regarding the tax consequences of the purchase of puts,
there is currently no definitive rule that establishes the tax consequences of
many of the types of puts that the Funds could acquire under the 1940 Act.
Therefore, although the Intermediate Tax-Free Bond Fund will only acquire a put
after concluding that it will have the tax consequences described above, the
Internal Revenue Service could reach a different conclusion from that of the
Fund.

         The Intermediate Tax-Free Bond Fund will distribute at least 90% of any
investment company taxable income for each taxable year. In general, the Fund's
investment company taxable income will be its taxable income subject to certain
adjustments and excluding net capital gains (i.e., the excess of any net
long-term capital gain for the taxable year over the net short-term capital
loss, if any for such year). The Intermediate Tax-Free Bond Fund will be taxed
on any undistributed investment company taxable income. To the extent such
income is distributed by the Intermediate Tax-Free Bond Fund (whether in cash or
additional Shares), it will be taxable to Shareholders as ordinary income. The
Fund intends to/will distribute net capital gains, if any, at least once a year
and such distributions will generally be taxable to Shareholders. The
dividends-received deduction for corporations will not apply to such
distributions.

         If for any taxable year the Intermediate Tax-Free Bond Fund does not
qualify for the special tax treatment accorded RICs and their Shareholders, all
of its taxable income would be subject to tax at regular corporate rates
(without any deduction for distributions to Shareholders), and Municipal
Securities interest income, although not taxable to the Fund, would be taxable
to Shareholders when distributed as dividends.

         Income exempt from federal income taxation must be considered when
determining whether Social Security payments or railroad retirement benefits
received by a Shareholder are subject to federal income taxation.

         Interest income from certain types of municipal securities may
constitute a preference item for individuals for purposes of the federal
alternative minimum tax. To the extent the Intermediate Tax-Free Bond Fund
invests in these securities, individual Shareholders, depending on their own tax
status, may be subject to alternative minimum tax on that part of the
Intermediate Tax-Free Bond Fund's distributions derived from these securities.
More generally, corporate Shareholders may be subject to the federal alternative
minimum tax on distributions derived by the Intermediate Tax-Free Bond Fund from
Municipal Securities.

                                      B-28
<PAGE>   163
         Opinions relating to the validity of Municipal Securities and to the
exemption of interest thereon from federal income tax are rendered by bond
counsel to the respective issuers at the time of issuance. Neither the
Intermediate Tax-Free Bond Fund nor its Adviser will review the proceedings
relating to the issuance of Municipal Securities or the basis for such opinions.

         The foregoing is only a summary of some of the important federal tax
considerations generally affecting purchasers of Shares of the Intermediate
Tax-Free Bond Fund. Additional tax information concerning all of the Funds is
contained in the immediately preceding section of this Statement of Additional
Information. No attempt is made to present a detailed explanation of the income
tax treatment of the Intermediate Tax-Free Bond Fund or its Shareholders, and
this discussion is not intended as a substitute for careful tax planning.
Accordingly, potential purchasers of Shares of the Intermediate Tax-Free Bond
Fund are urged to consult their tax advisers with specific reference to their
own tax situation.


                                    VALUATION

         The Money Market Funds have elected to use the amortized cost method of
valuation pursuant to Rule 2a-7 under the 1940 Act. This involves valuing an
instrument at its cost initially and thereafter assuming a constant amortization
to maturity of any discounts or premiums, regardless of the impact of
fluctuating interest rates on the market value of the instrument. This method
may result in periods during which value, as determined by amortized cost, is
higher or lower than the price each Fund would receive if it sold the
instrument. The value of securities in the Funds can be expected to vary
inversely with changes in prevailing interest rates.

         Pursuant to Rule 2a-7, the Money Market Funds will maintain a
dollar-weighted average portfolio maturity appropriate to their objective of
maintaining a stable net asset value per Share, provided that no Fund will
purchase any security with a remaining maturity of more than 397 days
(securities subject to repurchase agreements and certain variable or floating
rate instruments may bear longer maturities) nor maintain a dollar-weighted
average portfolio maturity which exceeds 90 days. The Funds' Board of Trustees
has also undertaken to establish procedures reasonably designed, taking into
account current market conditions and a Fund's investment objective, to
stabilize the net asset value per Share of the Money Market Funds for purposes
of sales and redemptions at $1.00. These procedures include review by the
Trustees, at such intervals as they deem appropriate, to determine the extent,
if any, to which the net asset value per Share of each Fund calculated by using
available market quotations deviates from $1.00 per Share. In the event such
deviation exceeds one half of one percent, the Rule requires that the Board
promptly consider what action, if any, should be initiated. If the Trustees
believe that the extent of any deviation from a Fund's $1.00 amortized cost
price per Share may result in material dilution or other unfair results to new
or existing investors, they will take such steps as they consider appropriate to
eliminate or reduce to the extent reasonably practicable any such dilution or
unfair results. These steps may include selling portfolio instruments prior to
maturity, shortening the dollar-weighted average portfolio maturity, withholding
or reducing dividends, reducing the number of a Fund's outstanding Shares
without monetary consideration, or utilizing a net asset value per Share
determined by using available market quotations.

                                      B-29
<PAGE>   164
         The value of portfolio securities of (i) the U.S. Treasury Fund and the
Cash Management Fund determined for the shadow pricing of such assets under Rule
2a-7(c)(7) and (ii) each Bond Fund and Equity Fund for purposes of establishing
the net asset value per share of such Fund will be determined according to the
following Security Valuation Procedures:

                  A.       If available, based on price obtained from one of the
                           following independent pricing services: Muller Data
                           Corporation, J.J. Kenney Co., Inc., Merrill Lynch &
                           Co., Inc., Interactive Data Corporation, Bloomberg
                           L.P., and Reuters Limited;

                  B.       If a security cannot be valued pursuant to paragraph
                           (A) hereof, based on quotes from at least two
                           broker/dealers or market makers identified by the
                           Funds' Adviser, such quotes to be obtained by the
                           Funds' Fund Accountant, if such quotes are available;
                           or

                  C.       If a security cannot be valued pursuant to paragraphs
                           (A) and (B) hereof, based on a price determined by
                           the Funds' Pricing Committee.


         The Bond Funds and the Equity Funds will value securities for which the
principal market is a securities exchange, at their fair market values based
upon the latest available sales price or, absent such a price, by reference to
the latest available bid prices in the principal market in which such securities
are normally traded. Securities, the principal market for which is not a
securities exchange, will be valued based on bid quotations in such principal
market. Short-term securities are valued at amortized cost, which approximates
current value.


         The Pricing Committee conducts its pricing activities in the manner
established by the Security Valuation Procedures. The Security Valuation
Procedures are reviewed and approved by the Funds' Board of Trustees at least
annually.

                 ADDITIONAL PURCHASE AND REDEMPTION INFORMATION

         Shares in each Fund are sold on a continuous basis by BISYS Fund
Services (the "Distributor"), and the Distributor has agreed to use appropriate
efforts to solicit all purchase orders. In addition to purchasing Shares
directly from the Distributor, Shares may be purchased through financial
institutions and intermediaries, broker-dealers, or similar entities, including
affiliates or subsidiaries of the Distributor ("Participating Organizations")
pursuant to contractual arrangements with the Distributor under the Funds'
Distribution and Shareholder Services Plan. Customers purchasing Shares of the
Funds may include officers, directors, or employees of the Adviser and its
affiliates.

                                      B-30
<PAGE>   165
<TABLE>
                                                              FEE TABLE
                                                              ---------

<CAPTION>
                                                  Intermediate   Intermediate   Short-Term                       Growth   Small Cap
                                           Bond       Bond         Tax-free       Income     Equity   Balanced   Equity    Equity
                                           Fund       Fund         Bond Fund       Fund       Fund      Fund      Fund      Fund
                                           ----       ----         ---------       ----       ----      ----      ----      ----
<S>                                        <C>    <C>            <C>            <C>          <C>      <C>        <C>      <C>
Shareholder Transaction Expenses(1)
--------------------------------
Maximum Sales Load                         4.00%      3.00%          3.00%         2.00%      5.00%     5.00%     5.00%     5.00%
Imposed on Purchases(2)
(as a percentage of offering price)

Maximum Sales Load Imposed                    0%         0%             0%            0%         0%        0%        0%        0%
on Reinvested Dividends
(as a percentage of offering price)

Deferred Sales Load(3)                        0%         0%             0%            0%         0%        0%        0%        0%
(as a percentage of original purchase
price or redemption proceeds, if applicable)

Redemption Fees(4)                            0%         0%             0%            0%         0%        0%        0%        0%
(as a percentage of amount redeemed,
if applicable)

Exchange Fees                                $0         $0             $0            $0         $0        $0        $0        $0
</TABLE>

         (1) Participating organizations may charge a Customer's account fees
for automatic investment and other investment and trust services provided in
connection with investment in the Funds.

         (2) There may be no sales load imposed upon purchases of Shares of the
Funds by (1) investors who purchase through the Investment Adviser and who have
an existing trust relationship with the Investment Adviser; (2) employees of the
Investment Adviser or its affiliates; (3) each Trustee of the Funds and any
employee of a company that constitutes the principal business activity of a
Trustee; (4) employees of the Distributor and its affiliates; (5) orders placed
on behalf of other investment companies distributed by The BISYS Group, Inc. or
its affiliated companies; (6) existing Shareholders who own Shares in any of the
Bond Investment Funds within their trust accounts and purchase additional Shares
outside of their trust relationships; (7) investors within wrap accounts; (8)
investors who purchase in connection with 401(k) plans, 403(b) plans, and other
employer-sponsored, qualified retirement plans; and (9) investors who purchase
in connection with non-transactional fee fund programs and programs offered by
fee-based financial planners and other types of financial institutions.

         (3) A Contingent Deferred Sales Load of 1.00% for the Bond Fund, the
Equity Fund, the Balanced Fund, the Growth Equity Fund, and the Small Cap Equity
Fund, 0.75% for the Intermediate Bond Fund and Intermediate Tax-Free Bond Fund,
and 0.50% for the Short-Term Income Fund will be assessed against the proceeds
of any redemption request relating to Shares of that Fund which were purchased
without a sales charge in reliance upon the waiver accorded to purchases in the
amount of $1 million or more, but only where such redemption request is made
within one year of the date the Shares were purchased.

         (4) A wire redemption charge may be deducted from the amount of a wire
redemption payment made at the request of a holder of Shares. The current
charge, which is subject to change upon notice to Shareholders, is $15.00.

         The Funds may suspend the right of redemption or postpone the date of
payment for Shares during any period when (a) trading on the NYSE is restricted
by applicable rules and regulations of the SEC, (b) the NYSE is closed for other
than customary weekend and holiday closings, (c) the SEC has by order permitted
such suspension, or (d) an emergency exists as determined by the SEC.

                                      B-31
<PAGE>   166
         The Money Market Funds may redeem Shares involuntarily if redemption
appears appropriate in light of the Funds' responsibilities under the 1940 Act.
(See "VALUATION - The Money Market Funds" above for further information.)

                                      B-32
<PAGE>   167
                  MANAGEMENT AND SERVICE PROVIDERS OF THE FUNDS

TRUSTEES AND OFFICERS
---------------------

         The names of the trustees and the officers of the Funds, their
addresses, and principal occupations during the past five years are as follows:

<TABLE>
<CAPTION>
                                     Position(s) Held               Principal Occupation
Name, Address, and Age               With the Funds                 During Past 5 Years
----------------------               ----------------               -------------------
<S>                                  <C>                            <C>
Walter B. Grimm*, 55                 Chairman, President,           From June, 1992 to present, employee of
3435 Stelzer Road                    and Trustee                    BISYS Fund Services.
Columbus, OH  43219

Michael J. Hall, 56                  Trustee                        From September, 1998 to present, Vice
10701 E. Ute Street                                                 President Finance and Chief Financial
Tulsa, Oklahoma  74116                                              Officer and Director, Matrix Service
                                                                    Company; from December 1995 to November,
                                                                    1997, Vice President and Chief Financial
                                                                    Officer, Worldwide Sports & Recreation,
                                                                    Inc.; from January, 1994 to November,
                                                                    1997, Vice President and Chief Financial
                                                                    Officer, Pexco Holdings, Inc.

I. Edgar Hendrix, 56                 Trustee                        From July 2000 to present, Executive V.P.
8 East 3rd Street                                                   and Chief Financial Officer, Spectrum
Tulsa, Oklahoma  74103                                              Field Services, Inc.; from July 1976 to
                                                                    1999, Vice-President and Treasurer,
                                                                    Parker Drilling Company.

Perry A. Wimpey, 68                  Trustee                        From January, 1992 to present, Local
4843 S. 69th East Ave.                                              Financial and Regulatory Consultant.
Tulsa, Oklahoma  74145


Alaina V. Metz, 33                   Assistant Secretary            From June, 1995 to present, employee of
3435 Stelzer Road                                                   BISYS Fund Services; from May 1989 to
Columbus, OH  43219                                                 June 1995, Supervisor, Mutual Fund Legal
                                                                    Department, Alliance Capital Management.

Jeffrey Shiverdecker, 38             Treasurer                      From July, 1996 to present, employee
3435 Stelzer Road                                                   of BISYS Fund Services; from December
Columbus, OH  43219                                                 1990 to July 1996, Manager, Investor
                                                                    Fiduciary Trust Company; from
                                                                    October 1980 to 1990, Production
                                                                    Engineer, The Coca-Cola Company.
</TABLE>

                                      B-33
<PAGE>   168
<TABLE>
<S>                                  <C>                            <C>
Jeffrey Cusick, 41                   Vice President and             From July, 1995 to present, employee of
3435 Stelzer Road                    Secretary                      BISYS Fund Services; from September 1993
Columbus, OH 43219                                                  to July 1995, Assistant Vice President,
                                                                    Federated Administration Services; from
                                                                    1989 to September 1993, Client Services
                                                                    Manager, Federated Administration
                                                                    Services.

William J. Tomko, 42                 Assistant Treasurer            From 1986 to present, employee of BISYS
3435 Stelzer Road                                                   Fund Services.
Columbus, OH 43219
</TABLE>

---------------

         * Mr. Grimm is considered to be an "interested person" of the Funds as
defined in the 1940 Act.

         The Trustees receive fees and are reimbursed for their expenses in
connection with each meeting of the Board of Trustees they attend. However, no
officer or employee of an Adviser or the Administrator of the Funds receives any
compensation from the Funds for acting as a Trustee. The officers of the Funds
receive no compensation directly from the Funds for performing the duties of
their offices. BISYS receives fees from each Fund for acting as Administrator
and may receive additional income under the Distribution Plan of the Funds.

<TABLE>
                                              COMPENSATION TABLE(1)
                                              ------------------

<CAPTION>
                                                                                                Total
                          Aggregate              Pension of                                     Compensation
                          Compensation           Retirement                                     from the
                          from the               Benefits                Estimated              American
                          American               Accrued As              Annual                 Performance
Name of Person            Performance            Part of Fund            Benefits Upon          Funds Paid to
Position                  Funds                  Expenses                Retirement             Trustee
--------                  -----                  --------                ----------             -------
<S>                       <C>                    <C>                     <C>                    <C>
Walter B. Grimm           $0                     None                    None                   $0
Michael J. Hall           $9,000                 None                    None                   $9,000
Perry A. Wimpey           $9,000                 None                    None                   $9,000
I. Edgar Hendrix          $9,000                 None                    None                   $9,000
</TABLE>

(1)  Figures are for the Funds' fiscal year ended August 31, 2000.

                                      B-34
<PAGE>   169
CODE OF ETHICS
--------------

         Each Fund, Bank of Oklahoma, N.A., and BISYS Fund Services have adopted
codes of ethics ("Codes") under Rule 17j-1 of the 1940 Act, and these Codes
permit personnel subject to the Codes to invest in securities, including
securities that may be purchased or held by each Fund.

INVESTMENT ADVISER
------------------

         Investment advisory services are provided to each of the Funds by BOK,
pursuant to an Investment Advisory Agreement.

         BOK, the largest trust company headquartered in the State of Oklahoma,
is a subsidiary of BOK Financial Corporation ("BOK Financial"). BOK Financial is
controlled by its principal shareholder, George B. Kaiser. Through its
subsidiaries, BOK Financial provides a full array of trust, commercial banking
and retail banking services. Its non-bank subsidiaries engage in various
bank-related services, including mortgage banking and providing credit, life,
accident, and health insurance on certain loans originated by its subsidiaries.

         BOK maintains offices in Oklahoma, Arkansas, Texas and New Mexico and
offers a variety of services for both corporate and individual customers.
Individual financial trust services include personal trust management,
administration of estates, and management of individual investments and
custodial accounts. For corporate clients, the array of services includes
management, administration and recordkeeping of pension plans, thrift plans,
401(k) plans and master trust plans. BOK has experience in providing investment
advisory service to the Funds and experience in managing collective investment
funds with investment portfolios and objectives comparable to those of the
Funds. BOK also serves as transfer agent and registrar for corporate securities,
paying agent for dividends and its affiliates and interest, and indenture
trustee of bond issues. At September 30, 2000, BOK and its affiliates had
approximately $9.2 billion in assets under management.

         Subject to the general supervision of the Funds' Board of Trustees and
in accordance with the investment objective and restrictions of each of the
Funds, BOK reviews, supervises, and provides general investment advice regarding
each of the Funds' investment programs. Subject to the general supervision of
the Funds' Board of Trustees and in accordance with the investment objective and
restrictions of each of the Funds, BOK makes all final decisions with respect to
portfolio securities of each of the Funds, places orders for all purchases and
sales of the portfolio securities of each of the Funds, and maintains each
Fund's records directly relating to such purchases and sales.

         For the services provided and expenses assumed pursuant to the
Investment Advisory Agreement with the Funds, the Adviser is entitled to receive
a fee from each of the Funds, computed daily and paid monthly, based on the
lower of (1) such fee as may, from time to time, be agreed upon in writing by
the Funds and the Adviser or (2) the average daily net assets of each such Fund
as follows: the U.S. Treasury Fund and the Cash Management Fund - forty
one-hundredths of one percent (0.40%) annually; the Equity Fund and the Small
Cap Equity Fund and the Growth Equity Fund - sixty-nine one-hundredths of one
percent (0.69%) annually; the

                                      B-35
<PAGE>   170
Balanced Fund -seventy-four one-hundredths of one percent (0.74%) annually; the
Bond Fund, the Intermediate Bond Fund, the Intermediate Tax-Free Bond Fund and
the Short-Term Income Fund - fifty-five one-hundredths of one percent (0.55%)
annually. (See "SALES CHARGES," "DISTRIBUTION," and "GENERAL INFORMATION
--Custodian and Transfer Agent.") BOK may periodically waive all or a portion of
its fee with respect to any Fund to increase the net income of such Fund
available for distribution as dividends.

The Funds paid BOK the following fees for investment advisory services:


<TABLE>
                                                   FISCAL YEAR ENDED

<CAPTION>
                                            August 31, 2000              August 31, 1999              August 31, 1998
                                            ---------------              ---------------              ---------------
                                                 Additional                   Additional                   Additional
                                                     Amount                       Amount                       Amount
                                          Paid       Waived           Paid        Waived           Paid        Waived
                                          ----       ------           ----        ------           ----        ------
<S>                                 <C>          <C>            <C>           <C>            <C>             <C>
U.S. Treasury Fund                  $1,944,043     $     --     $1,664,869      $      0     $1,495,245      $      0
Cash Management Fund                 1,665,822      631,871      1,862,255*      200,753      1,630,192*            0
Bond Fund                              204,794      117,027        198,756       113,576        162,521        92,870
Intermediate Bond Fund                 295,193      168,684        307,478       175,703        284,465       162,552
Intermediate Tax-Free Bond Fund         97,078       55,474        106,891        61,081        100,362        57,350
Short-Term Income Fund                      --      347,187              0       298,363              0       117,712
Equity Fund                            811,482      308,366        952,423       361,923        974,200       370,196
Balanced Fund                          263,998      201,142        161,661       226,590         46,817       236,504
Growth Equity Fund                     826,644      314,128        580,464       220,577        287,102       109,099
Small Cap Equity Fund                       --       53,360              0(1)     21,596(1)         N/A            --
Aggressive Growth Fund                     N/A          N/A         43,409        16,495        188,145        81,755
</TABLE>


* Of this amount, AMR Investment Services, Inc. received $497,875 for the fiscal
year ended August 31, 1999 and $954,195 for the fiscal year ended August 31,
1998.

         Until April 30, 1999, sub-investment advisory services were provided to
the Cash Management Fund by AMR Investment Services, Inc. ("AMR") pursuant to a
Sub-Investment Advisory Agreement between BOK and AMR. For the services provided
and the expenses assumed pursuant to the Sub-Advisory Agreement, AMR received a
fee from BOK, computed daily and paid monthly, at the annual rate of not less
than fifteen one-hundredths of one percent (0.15%) nor more than forty
one-hundredths of one percent (0.40%) of the average daily net assets of the
Cash Management Fund.

         The Investment Advisory Agreement will continue in effect as to a
particular Fund for successive one-year terms after the aforementioned date, if
such continuance is approved at least annually by the Funds' Board of Trustees
or by vote of a majority of the outstanding voting Shares of such Fund and a
majority of the Trustees who are not parties to the Investment Advisory
Agreement, or interested persons (as defined in 1940 Act) of any party to the
Investment Advisory Agreement by votes cast in person at a meeting called for
such purpose.

         The Investment Advisory Agreement is terminable as to a particular Fund
at any time on 60 days' written notice without penalty by the Trustees, by vote
of a majority of the outstanding voting Shares of that Fund, or by the
Investment Adviser. The Investment Advisory Agreement also terminates
automatically in the event of any assignment, as defined in the 1940 Act.

         The Investment Advisory Agreement provides that the Adviser shall not
be liable for any error of judgment or mistake of law or for any loss suffered
by the Funds in connection with the performance of the Agreement, except a loss
resulting from a breach of fiduciary duty with respect to the receipt of
compensation for services or a loss resulting from willful misfeasance,


(1) Figures are for the period from commencement & operations on February 17,
1999 through August 31, 1999.



                                      B-36
<PAGE>   171
bad faith, or gross negligence on the part of the respective provider of
services to the Funds in the performance of its duties, or from reckless
disregard by it of its duties and obligations thereunder.

         From time to time, advertisements, supplemental sales literature and
information furnished to present or prospective Shareholders of the Funds may
include descriptions of the Adviser including, but not limited to, (i) a
description of the adviser's operations; (ii) descriptions of certain personnel
and their functions; and (iii) statistics and rankings related to the adviser's
operations.

DISTRIBUTION
------------

         Shares of the Funds are sold on a continuous basis by the Distributor
for the Funds. Under the Funds' Amended and Restated Distribution and
Shareholder Services Plan (the "Distribution Plan"), each of the Funds will pay
a monthly distribution fee to the Distributor as compensation for its services
in connection with the Distribution Plan at an annual rate equal to twenty-five
one hundredths of one percent (0.25%) of its average daily net assets. The
Distributor may use the distribution fee to provide distribution assistance with
respect to the Funds' Shares or to provide Shareholder services to the holders
of the Funds' Shares. The Distributor may also use the distribution fee (i) to
pay financial institutions and intermediaries (such as insurance companies, and
investment counselors, but not including banks), broker-dealers, and the
Distributor's affiliates and subsidiaries compensation for services or
reimbursement of expenses incurred in connection with distribution assistance or
(ii) to pay banks, other financial institutions and intermediaries,
broker-dealers, and the Distributor's affiliates and subsidiaries compensation
for services or reimbursement of expenses incurred in connection with the
provision of Shareholder services. All payments by the Distributor for
distribution assistance or Shareholder services under the Distribution Plan will
be made pursuant to an agreement between the Distributor and such bank, other
financial institution or intermediary, broker-dealer, or affiliate or subsidiary
of the Distributor (a "Servicing Agreement"; banks, other financial institutions
and intermediaries, broker-dealers, and the Distributor's affiliates and
subsidiaries which may enter into a Servicing Agreement are hereinafter referred
to individually as a "Participating Organization"). A Servicing Agreement will
relate to the provision of distribution assistance in connection with the
distribution of the Funds' Shares to the Participating Organization's customers
on whose behalf the investment in such Shares is made and/or to the provision of
Shareholder services rendered to the Participating Organization's customers
owning the Funds' Shares. Under the Distribution Plan, a Participating
Organization may include the Funds' Advisers or their affiliates. A Servicing
Agreement entered into with a bank (or any of its subsidiaries or affiliates)
will contain a representation that the bank (or subsidiary or affiliate)
believes that it possesses the legal authority to perform the services
contemplated by the Servicing Agreement without violation of applicable banking
laws (including the Glass-Steagall Act).

         The distribution fee will be payable without regard to whether the
amount of the fee is more or less than the actual expenses incurred in a
particular year by the Distributor in connection with distribution assistance or
Shareholder services rendered by the Distributor itself or incurred by the
Distributor pursuant to the Servicing Agreements entered into under the

                                      B-37
<PAGE>   172
Distribution Plan. If the amount of the distribution fee is greater than the
Distributor's actual expenses incurred in a particular year (and the Distributor
does not waive that portion of the distribution fee), the Distributor will
realize a profit in that year from the distribution fee. If the amount of the
distribution fee is less than the Distributor's actual expenses incurred in a
particular year, the Distributor will realize a loss in that year under the
Distribution Plan and will not recover from the Funds the excess of expenses for
the year over the distribution fee, unless actual expenses incurred in a later
year in which the Distribution Plan remains in effect were less than the
distribution fee paid in that later year. The Distributor may periodically waive
all or a portion of the distribution fee to increase the net income attributable
to a Fund available for distribution as dividends to the Fund's Shareholders. To
lower operating expenses, the Distributor may voluntarily reduce its fees under
the Distribution Plan.

         The Distributor received the following amounts under the Distribution
Plan:


<TABLE>
                                                 FISCAL YEAR ENDED

<CAPTION>
                                           August 31, 2000             August 31, 1999             August 31, 1998
                                           ---------------             ---------------             ---------------
                                                Additional                  Additional                  Additional
                                                    Amount                      Amount                      Amount
                                       Paid         Waived         Paid         Waived         Paid         Waived
                                       ----         ------         ----         ------         ----         ------
<S>                                <C>          <C>            <C>          <C>            <C>          <C>
U.S. Treasury Fund                 $     --     $1,215,022     $      0     $1,040,542     $      0     $  934,531
Cash Management Fund                     --      1,436,053            0      1,289,379            0      1,018,870
Bond Fund                           146,283             --      141,969              0      116,086              0
Intermediate Bond Fund              210,854             --      219,627              0      203,189              0
Intermediate Tax-Free Bond Fund          --         69,342            0         76,352            0         71,687
Short-Term Income Fund              107,312         50,500       69,143         66,742            0         53,506
Equity Fund                         405,741             --      476,212              0      487,100              0
Balanced Fund                            --        157,142            0        131,166            0         95,717
Growth Equity Fund                  413,322             --      290,232              0           --             --
Small Cap Equity Fund                    --         19,333            0          7,824           --             --
Aggressive Growth Fund                   --             --       21,704             --      112,919              0
</TABLE>


         Substantially all of the amount received by the Distributor under the
Distribution Plan during the last fiscal year, the periods from September 1,
1999 to August 31, 2000, was spent on compensation to dealers. BISYS retained
1.09% and spent this amount on printing and mailing of prospectuses. The total
amount spent on compensation to dealers during the last fiscal year was $14,025.
The total amount retained by BISYS during the last fiscal year was $1,269,487.

GLASS-STEAGALL ACT
------------------


         The Gramm-Leach-Bliley Act of 1999 repealed certain provisions of the
Glass-Steagall Act that had previously restricted the ability of banks and their
affiliates to engage in certain mutual fund activities. Nevertheless, the
Adviser's activities remain subject to, and may be limited by, applicable
federal banking law and regulations. The Adviser believes that they possess the
legal authority to perform the services for the Funds contemplated by the
Investment Advisory Agreement and described in the Prospectuses and this
Statement of Additional Information and has so represented in the Investment
Advisory Agreement. Future changes in either federal or state statutes and
regulations relating


                                      B-38
<PAGE>   173

to the permissible activities of banks or bank holding companies and the
subsidiaries or affiliates of those entities, as well as further judicial or
administrative decisions or interpretations of present and future statutes and
regulations could prevent or restrict the Adviser from continuing to perform
such services for the Trust. Depending upon the nature of any changes in the
services that could be provided by the Adviser, the Board of Trustees of the
Trust would review the Trust's relationship with the Adviser and consider taking
all action necessary in the circumstances.

         Should further legislative, judicial or administrative action prohibit
or restrict the activities of the Adviser its affiliates, and its correspondent
banks in connection with customer purchases of Shares of the Trust, such Banks
might be required to alter materially or discontinue the services offered by
them to customers. It is not anticipated, however, that any change in the
Trust's method of operations would affect its net asset value per Share or
result in financial losses to any customer.


PORTFOLIO TRANSACTIONS
----------------------

         Pursuant to the Investment Advisory Agreement, subject to the general
supervision of the Board of Trustees of the Funds and in accordance with each
Fund's investment objective, policies and restrictions, which securities are to
be purchased and sold by each such Fund and which brokers are to be eligible to
execute its portfolio transactions. Purchases and sales of portfolio securities
with respect to the Money Market Funds and the Bond Funds usually are principal
transactions in which portfolio securities are purchased directly from the
issuer or from an underwriter or market maker for the securities. Purchases from
underwriters of portfolio securities include a commission or concession paid by
the issuer to the underwriter and purchases from dealers serving as market
makers may include the spread between the bid and asked price. Transactions with
respect to the Equity Funds on stock exchanges (other than certain foreign stock
exchanges) involve the payment of negotiated brokerage commissions. Transactions
in the over-the-counter market are generally principal transactions with
dealers. With respect to the over-the-counter market, the Funds, where possible,
will deal directly with the dealers who make a market in the securities involved
except in those circumstances where better price and execution are available
elsewhere. While the Adviser generally seeks competitive spreads or commissions,
the Funds may not necessarily pay the lowest spread or commission available on
each transaction, for reasons discussed below.

         During the fiscal year ended August 31, 2000, the Funds paid aggregate
brokerage commissions as follows:

         Equity Fund                                 $489,870
         Balanced Fund                               $132,948
         Growth Equity Fund                           $33,524
         Small Cap Equity Fund                        $30,219

         During the fiscal year ended August 31, 1999, the Funds paid aggregate
brokerage commissions as follows:

                                      B-39
<PAGE>   174
         Equity Fund                                 $558,258
         Aggressive Growth Fund                      $104,769
         Balanced Fund                               $104,663
         Growth Equity Fund                          $236,072
         Small Cap Equity Fund                        $25,692


         During the fiscal year ended August 31, 1998, the Funds paid aggregate
brokerage commissions as follows:

         Equity Fund                                  $279,771
         Aggressive Growth Fund                       $118,045
         Balanced Fund                                 $56,206
         Growth Equity Fund                            $61,297

         Allocation of transactions, including their frequency, to various
dealers is determined by the Adviser with respect to the Funds it serves based
on its best judgment and in a manner deemed fair and reasonable to Shareholders.
The primary consideration is prompt execution of orders in an effective manner
at the most favorable price. Subject to this consideration, dealers who provide
supplemental investment research to the Adviser may receive orders for
transactions by the Funds. Information so received is in addition to and not in
lieu of services required to be performed by the Adviser and does not reduce the
advisory fees payable to the Adviser. Such information may be useful to the
Adviser in serving both the Funds and other clients and, conversely,
supplemental information obtained by the placement of business of other clients
may be useful to such adviser in carrying out its obligations to the Funds.

         The Funds will not execute portfolio transactions through, acquire
portfolio securities issued by, make savings deposits in, or enter into
repurchase or reverse repurchase agreements with the Adviser, the Distributor,
or their affiliates except as may be permitted under the 1940 Act, and will not
give preference to correspondents of an Adviser with respect to such
transactions, securities, savings deposits, repurchase agreements, and reverse
repurchase agreements.

         Investment decisions for each Fund are made independently from those
for the other Funds or any other investment company or account managed by the
Adviser. Any such other investment company or account may also invest in the
same securities as the Funds. When a purchase or sale of the same security is
made at substantially the same time on behalf of a given Fund and another Fund,
investment company or account, the transaction will be averaged as to price, and
available investments allocated as to amount, in a manner which the Adviser
believes to be equitable to the Fund(s) and such other investment company or
account. In some instances, this investment procedure may adversely affect the
price paid or received by a Fund or the size of the position obtained by a Fund.
To the extent permitted by law, the Adviser may aggregate the securities to be
sold or purchased by it for a Fund with those to be sold or purchased by it for
other Funds or for other investment companies or accounts in order to obtain
best execution. As provided by the Investment Advisory Agreement, in making
investment recommendations for the Funds, the Adviser will not inquire or take
into consideration whether an issuer of securities

                                      B-40
<PAGE>   175
proposed for purchase or sale by the Funds is a customer of the Adviser or their
respective parents or subsidiaries or affiliates unless legally required to do
so and, in dealing with its commercial customers, the Adviser and their
respective parents, subsidiaries, and affiliates will not inquire or take into
consideration whether securities of such customers are held by the Funds.

Allocation of Initial Public Offerings
--------------------------------------

         Opportunities to invest in initial public offerings ("IPOs") will be
allocated to Funds in a fair and equitable manner pursuant to the following
procedures. When an opportunity to participate in an IPO has been identified,
the investment personnel of BOK will conduct an analysis to determine which
Funds would benefit from the addition of the IPO to their portfolios. This
analysis will take into account each Fund's investment objective, policies and
limitations. Also considered will be each Fund's liquidity and present
portfolio, including risk/reward characteristics. When BOK investment personnel
determine that an IPO opportunity is suitable and desirable for more than one
Fund, the IPO will be allocated to each such Fund on the basis of relative net
assets. Where the opportunity is determined to be suitable and desirable for
only one Fund, the opportunity will be allocated solely to that Fund. All Fund
allocation decisions shall be made by the Chief Investment Officer of BOK or
his/her delegate. The availability of opportunities to invest in IPOs is highly
dependent on market conditions. Investing in IPOs may significantly affect the
performance of a Fund.

ADMINISTRATOR
-------------

         BISYS Fund Services Ohio ("BISYS") serves as general manager and
administrator (the "Administrator") to each Fund pursuant to the Management and
Administration Agreement (the "Administration Agreement"). The Administrator
assists in supervising all operations of each Fund (other than those performed
under the Investment Advisory, Custodian, Fund Accounting, and Transfer Agency
Agreements for that Fund). The Administrator is a broker-dealer registered with
the SEC and is a member of the National Association of Securities Dealers, Inc.

         Under the Administration Agreement, the Administrator has agreed to
price the portfolio securities of each Fund and to compute the net asset value
and net income of those Funds on a daily basis, to maintain office facilities
for the Funds, to maintain the Funds' financial accounts and records, and to
furnish the Funds statistical and research data, data processing, clerical,
accounting, and bookkeeping services, and certain other services required by the
Funds with respect to the Funds. The Administrator prepares annual and
semi-annual reports to the SEC, prepares federal and state tax returns, prepares
filings with state securities commissions, and generally assists in all aspects
of the Funds' operations other than those performed under the Investment
Advisory, Custodian, Fund Accounting, and Transfer Agency Agreements. Under the
Administration Agreement, the Administrator may delegate all or any part of its
responsibilities thereunder.

         The Administrator receives a fee from each Fund for its services
provided and expenses assumed pursuant to the Administration Agreement,
calculated daily and paid monthly, at the annual rate of twenty one hundredths
of one percent (0.20%) of each Fund's average daily net assets. The
Administrator may periodically set its fees at less than the maximum allowable

                                      B-41
<PAGE>   176
amount with respect to any Fund in order to increase the net income of one or
more of the Funds available for distribution as dividends.

         BISYS received the following fees for management and administrative
services:

<TABLE>
                                        FISCAL YEAR ENDED

<CAPTION>
                                          August 31, 2000    August 31, 1999    August 31, 1998
                                          ---------------    ---------------    ---------------
                                        Paid       Waived               Paid               Paid
                                        ----       ------               ----               ----
<S>                                 <C>          <C>                <C>                <C>
U.S. Treasury Fund                  $972,021     $     --           $832,442           $747,624
Cash Management Fund                 919,078      229,769            958,511            815,098
Bond Fund                            117,027           --            113,576             92,870
Intermediate Bond Fund               168,684           --            175,704            162,552
Intermediate Tax-Free Bond Fund       55,474           --             61,081             57,350
Short-Term Income Fund               126,250           --            108,497             42,805
Equity Fund                          324,594           --            380,973            389,681
Balanced Fund                        125,714           --            104,934             76,574
Growth Equity Fund                   330,659           --            232,188            114,841
Small Cap Equity Fund                 15,467           --              6,259                 --
Aggressive Growth Fund                    --           --             14,453             86,058
</TABLE>

         The Administration Agreement provides that the Administrator shall not
be liable for any error of judgment or mistake of law or any loss suffered by
the Funds in connection with the matters to which the Agreement relates, except
a loss resulting from willful misfeasance, bad faith, or gross negligence in the
performance of its duties, or from the reckless disregard by it of its
obligations and duties thereunder.

SUB-ADMINISTRATOR
-----------------

         Effective May 12, 1995, BOK became the Sub-Administrator to the Funds
pursuant to an agreement between the Administrator and BOK. Pursuant to this
agreement, BOK assumed many of the Administrator's duties, for which BOK
receives a fee, paid by the Administrator, calculated at an annual rate of five
one-hundredths of one percent (0.05%) of each Fund's average net assets.

         BOK received the following fees for Sub-Administration services:

<TABLE>
                                             FISCAL YEAR ENDED

<CAPTION>
                                       August 31, 2000           August 31, 1999           August 31, 1998
                                       ---------------           ---------------           ---------------
                                                  Paid                      Paid                      Paid
                                                  ----                      ----                      ----
<S>                                    <C>                       <C>                       <C>
U.S. Treasury Fund                            $243,002                  $ 20,611                  $373,811
Cash Management Fund                           287,210                   239,628                   407,548
Bond Fund                                       29,255                    15,270                    63,848
Intermediate Bond Fund                          42,199                    27,124                   111,754
Intermediate Tax-Free Bond Fund                 13,868                    43,926                    39,428
Short-Term Income Fund                          31,562                    28,394                    29,428
Equity Fund                                     81,148                    26,234                   336,099
Balanced Fund                                   31,428                    95,243                    70,830
Growth Equity Fund                              82,659                    58,047                    99,050
Small Cap Equity Fund                            3,866                     1,565                         -
Aggressive Growth Fund                              --                     2,891                    74,225
</TABLE>

                                      B-42
<PAGE>   177
DISTRIBUTOR
-----------

         BISYS serves as distributor to each of the Funds pursuant to its
Distribution Agreement with the Funds.

CUSTODIAN, TRANSFER AGENT AND FUND ACCOUNTANT
---------------------------------------------

         Cash and securities owned by each of the Funds are held by BOK as
custodian. Under the Custodian Agreement BOK (i) maintains a separate account or
accounts in the name of each Fund; (ii) makes receipts and disbursements of
money on behalf of each Fund; (iii) collects and receives all income and other
payments and distributions on account of the Funds' portfolio securities; (iv)
responds to correspondence from security brokers and others relating to its
duties; and (v) makes periodic reports to the Funds' Board of Trustees
concerning the Funds' operations. BOK may, at its own expense, open and maintain
a sub-custody account or accounts on behalf of the Funds, provided that it shall
remain liable for the performance of all of its duties under the Custodian
Agreement.

         Under the Custodian Agreement, the Funds have agreed to pay BOK a
custodian fee with respect to each Fund at an annual rate of three one
hundredths of one percent (0.03%) of such Fund's average daily net assets. BOK
is also entitled to be reimbursed by the Funds for its reasonable out-of-pocket
expenses incurred in the performance of its duties under the Custodian
Agreement. BOK may periodically set its custodian fees at less than the maximum
allowable amount with respect to a Fund to increase the Fund's net income
available for distribution as dividends.

         BISYS Fund Services Ohio, Inc. serves as transfer agent to each of the
Funds pursuant to a Transfer Agency Agreement with the Funds. While BISYS Fund
Services Ohio, Inc. is a distinct legal entity from BISYS Fund Services (each
Fund's Administrator and Distributor), BISYS Fund Services Ohio, Inc. is
considered to be an affiliated person of BISYS Fund Services under the 1940 Act
due to, among other things, the fact that BISYS Fund Services Ohio, Inc. is
owned by substantially the same persons that directly or indirectly own BISYS
Fund Services. Under the Transfer Agency Agreement, BISYS Fund Services Ohio,
Inc. has agreed: (i) to issue and redeem Shares of the Funds; (ii) to address
and mail all communications by the Funds to its Shareholders, including reports
to Shareholders, dividend and distribution notices, and proxy material for its
meetings of Shareholders; (iii) to respond to correspondence or inquiries by
Shareholders and others relating to its duties; (iv) to maintain Shareholder
accounts and certain sub-accounts; and (v) to make periodic reports to the
Funds' Board of Trustees concerning the Funds' operations.

         Under the Transfer Agency Agreement, the Funds have agreed to pay BISYS
Fund Services Ohio, Inc. an annual fee of two one- hundredths of one percent
(0.02%) of each Fund's average daily net assets. In addition to the annual per
fund fee, BISYS is entitled to receive an annual per account fee of $15.00 for
each IRA account and the following annual fees:

                                      B-43
<PAGE>   178
<TABLE>
Retail - Load     Retail - No-Load          Institutional
-------------     ----------------          -------------
<S>               <C>                       <C>                        <C>
Daily Dividend:   $25.00 per account        $21.00 per account         $17.00 per account
Annual Dividend:  $23.00 per account        $19.00 per account         $15.00 per account
</TABLE>

         BISYS Fund Services Ohio, Inc. is also entitled to be reimbursed for
out-of-pocket expenses in providing services under the Transfer Agency
Agreement.

         BISYS Fund Services Ohio, Inc. serves as fund accountant for each Fund
pursuant to a Fund Accounting Agreement with the Funds. As fund accountant for
the Funds, BISYS Fund Services Ohio, Inc. prices the Funds' Shares, calculates
the Funds' net asset value, and maintains the general ledger accounting records
for each Fund. Under its Fund Accounting Agreement with the Funds, BISYS Fund
Services Ohio, Inc. is entitled to receive a fee from each Fund as follows:
three one- hundredths of one percent (0.03%) of average net assets up to $150
million; two one- hundredths of one percent (0.02%) of average net assets in
excess of $150 million up to $250 million; one and one- half one- hundredths of
one percent (0.015%) of average net assets in excess of $250 million. BISYS Fund
Services Ohio, Inc. is also entitled to be reimbursed for out- of- pocket
expenses in providing services under the Fund Accounting Agreement. BISYS Fund
Services Ohio, Inc. may periodically set its fund accounting fees at less than
the maximum allowable amount with respect to a Fund in order to increase the
Fund's net income available for distribution as dividends.

AUDITORS
--------

         KPMG LLP, Two Nationwide Plaza, Columbus, Ohio, 43215, serves as
independent public accountants for the Funds.

LEGAL COUNSEL
-------------

         Ropes & Gray, Suite 800 East, One Franklin Square, 1301 K Street, N.W.,
Washington, D.C. 20005 are counsel to the Funds.

                             ADDITIONAL INFORMATION

DESCRIPTION OF SHARES
---------------------

         Each Fund is a separate series of a Massachusetts business trust which
was organized on October 1, 1987 and began active operations in August of 1990.
The Declaration of Trust was filed with the Secretary of State of the
Commonwealth of Massachusetts on October 2, 1987 and authorizes the Board of
Trustees to issue an unlimited number of Shares, which are units of beneficial
interest, with par value of $0.00001. The Funds currently comprise twelve series
of Shares which represent interests in the Institutional U.S. Treasury Fund, the
Institutional Cash Management Fund, the U.S. Treasury Fund, the Cash Management
Fund, the Bond Fund, the Intermediate Bond Fund, the Intermediate Tax-Free Bond
Fund, the Short-Term Income Fund, the Equity Fund, the Balanced Fund, the Growth
Equity Fund and the Small Cap Equity Fund. The Aggressive Growth Fund was
liquidated on February 19, 1999. The Declaration of Trust authorizes the Board
of Trustees to divide or redivide any unissued Shares of the Funds into one

                                      B-44
<PAGE>   179
or more additional series by setting or changing in any one or more respects
their respective preferences, conversion or other rights, voting power,
restrictions, limitations as to dividends, qualifications, and terms and
conditions of redemption.

Shares have no subscription or preemptive rights and only such conversion or
exchange rights as the Board may grant in its discretion. When issued for
payment as described in the Prospectuses and this Statement of Additional
Information, the Funds' Shares will be fully paid and non-assessable. In the
event of a liquidation or dissolution of the Funds, Shares of a Fund are
entitled to receive the assets available for distribution belonging to the Fund,
and a proportionate distribution, based upon the relative asset values of the
respective Funds, of any general assets not belonging to any particular Fund
which are available for distribution.

         Rule 18f-2 under the 1940 Act provides that any matter required to be
submitted to the holders of the outstanding voting securities of an investment
company such as the Funds shall not be deemed to have been effectively acted
upon unless approved by the holders of a majority of the outstanding Shares of
each Fund affected by the matter. For purposes of determining whether the
approval of a majority of the outstanding Shares of a Fund will be required in
connection with a matter, a Fund will be deemed to be affected by a matter
unless it is clear that the interests of each Fund in the matter are identical
(in which case the Shareholders of the Funds will vote in the aggregate), or
that the matter does not affect any interest of the Fund (in which case no vote
by the Shareholders of the Fund in question will be required). Under Rule 18f-2,
the approval of an investment advisory agreement or any change in investment
policy would be effectively acted upon with respect to a Fund only if approved
by a majority of the outstanding Shares of such Fund. However, Rule 18f-2 also
provides that the ratification of independent public accountants, the approval
of principal underwriting contracts, and the election of Trustees may be
effectively acted upon by Shareholders of the Funds voting without regard to
series.

SHAREHOLDER AND TRUSTEE LIABILITY
---------------------------------

         Under Massachusetts law, holders of units of beneficial interest in a
business trust may, under certain circumstances, be held personally liable as
partners for the obligations of the trust. However, the Declaration of Trust
provides that Shareholders shall not be subject to any personal liability for
the obligations of the Funds, and that every written agreement, obligation,
instrument, or undertaking made by the Funds shall contain a provision to the
effect that the Shareholders are not personally liable thereunder. The
Declaration of Trust provides for indemnification out of the trust property of
any Shareholder held personally liable solely by reason of his being or having
been a Shareholder. The Declaration of Trust also provides that the Funds shall,
upon request, assume the defense of any claim made against any Shareholder for
any act or obligation of the Funds, and shall satisfy any judgment thereon.
Thus, the risk of a Shareholder incurring financial loss on account of
Shareholder liability is limited to circumstances in which the Funds themselves
would be unable to meet their obligations.

         The Declaration of Trust states further that no Trustee, officer, or
agent of the Funds shall be personally liable in connection with the
administration or preservation of the assets of the trust or the conduct of the
Funds' business; nor shall any Trustee, officer, or agent be personally liable
to any person for any action or failure to act except for his own bad faith,
willful

                                      B-45
<PAGE>   180
misfeasance, gross negligence, or reckless disregard of his duties. The
Declaration of Trust also provides that all persons having any claim against the
Trustees or the Funds shall look solely to the assets of the trust for payment.

CALCULATION OF PERFORMANCE DATA
-------------------------------

         Yields based on the seven-day period ended August 31, 2000 (the "base
period") were as follows:

         U.S. Treasury Fund                                        4.40%
         Cash Management Fund                                      5.10%

         Effective yields based on the base period were as follows:

         U.S. Treasury Fund                                        4.50%
         Cash Management Fund                                      5.23%

         Each Money Market Fund's seven-day yield is computed by determining the
percentage net change, excluding capital changes, in the value of an investment
in one share of the Fund over the base period, and multiplying the net change by
365/7 (or approximately 52 weeks). Each Money Market Fund's effective yield
represents a compounding of the yield by adding 1 to the number representing the
percentage change in value of the investment during the base period, raising
that sum to a power equal to 365/7, and subtracting 1 from the result.

         Yields based on the thirty-day period ended August 31, 2000 ("30-day
base period") were as follows:

<TABLE>
<CAPTION>
--------------------------------------------------------------------------------
Fund                                 With Sales Load       Without Sales Load
--------------------------------------------------------------------------------
<S>                                  <C>                   <C>
Bond Fund                                      6.03%                    6.22%
--------------------------------------------------------------------------------
Intermediate Bond Fund                         5.73%                    5.93%
--------------------------------------------------------------------------------
Intermediate Tax-Free Bond Fund                3.45%                    3.88%
--------------------------------------------------------------------------------
Short-Term Income Fund                         5.79%                    6.41%
--------------------------------------------------------------------------------
</TABLE>

         The 30-day yield of each Bond Fund is calculated by dividing the net
investment income per-share earned during the 30-day base period by the maximum
offering price per share on the last day of the period, according to the
following formula:

                         30-Day Yield = 2[( a-b +1)(6)-1]
                                           -----
                                            cd

         In the above formula, "a" represents dividends and interest earned
during the 30-day base period; "b" represents expenses accrued for the 30-day
base period (net of reimbursements); "c" represents the average daily number of
Shares outstanding during the 30-day base period that

                                      B-46
<PAGE>   181
were entitled to receive dividends; and "d" represents the maximum offering
price per share on the last day of the 30-day base period.

         The tax equivalent yield for the Intermediate Tax-Free Bond Fund is
computed by dividing that portion of the Intermediate Tax Free Bond Fund's yield
which is tax-exempt by one minus a stated income tax rate and adding the product
to that portion, if any, of the yield of the Fund that is not tax-exempt. The
tax-equivalent yield for the Intermediate Tax-Free Bond Fund will generally be
computed based on an assumed effective Federal income tax rate of 39.6%.

         The average annual total return of each Bond Fund and Equity Fund is
determined by calculating the change in the value of a hypothetical $1,000
investment in the Fund for each of the periods shown. Average annual total
return for each Fund was computed by determining the average annual compounded
rate of return over the applicable period that would equate the initial amount
invested to the ending redeemable value of the investment. The ending redeemable
value includes dividends and capital gain distributions reinvested at net asset
value. The resulting percentages indicated the positive or negative investment
results that an investor would have experienced from changes in Share price and
reinvestment of dividends and capital gains distributions. The total return data
above are calculated assuming the imposition of the maximum sales charge for
each respective Fund.

         The average annual total returns for the one-year period ended August
31, 2000 were as follows:


<TABLE>
<CAPTION>
--------------------------------------------------------------------------------
Fund                                   With Sales Load      Without Sales Load
--------------------------------------------------------------------------------
<S>                                    <C>                  <C>
Bond Fund                                        2.16%                   6.38%
--------------------------------------------------------------------------------
Intermediate Bond Fund                           3.04%                   6.21%
--------------------------------------------------------------------------------
Intermediate Tax-Free Bond Fund                  2.56%                   5.78%
--------------------------------------------------------------------------------
Short-Term Income Fund                           4.80%                   6.92%
--------------------------------------------------------------------------------
Equity Fund                                      9.89%                  15.70%
--------------------------------------------------------------------------------
Balanced Fund                                    7.38%                  13.06%
--------------------------------------------------------------------------------
Growth Equity Fund                              14.45%                  20.45%
--------------------------------------------------------------------------------
Small Cap Equity Fund                           15.53%                  21.60%
--------------------------------------------------------------------------------
</TABLE>


         The average annual total returns for the five-year period ended August
31, 2000 were as follows:


<TABLE>
<CAPTION>
--------------------------------------------------------------------------------
Fund                                   With Sales Load      Without Sales Load
--------------------------------------------------------------------------------
<S>                                    <C>                  <C>
Bond Fund                                        5.16%                   6.03%
--------------------------------------------------------------------------------
Intermediate Bond Fund                           5.02%                   5.67%
--------------------------------------------------------------------------------
Intermediate Tax-Free Bond Fund                  4.08%                   4.71%
--------------------------------------------------------------------------------
Short-Term Income Fund                           5.87%                   6.29%
--------------------------------------------------------------------------------
Equity Fund                                     18.69%                  19.91%
--------------------------------------------------------------------------------
Balanced Fund                                   13.26%                  14.43%
--------------------------------------------------------------------------------
Growth Equity Fund                              26.11%                  27.40%
--------------------------------------------------------------------------------
</TABLE>


                                      B-47
<PAGE>   182
         The average annual total returns for the period from commencement of
operations through August 31, 1999 were as follows:


<TABLE>
<CAPTION>
--------------------------------------------------------------------------------------------------------------------
Fund                                     Commencement of Operations       With Sales Load       Without Sales Load
----                                     --------------------------       ---------------       ------------------
--------------------------------------------------------------------------------------------------------------------
<S>                                      <C>                              <C>                   <C>
Bond Fund                                September 28, 1990                         6.93%                    7.37%
--------------------------------------------------------------------------------------------------------------------
Intermediate Bond Fund                   September 28, 1990                         6.35%                    6.68%
--------------------------------------------------------------------------------------------------------------------
Intermediate Tax-Free Bond Fund          May 29, 1992                               5.35%                    5.74%
--------------------------------------------------------------------------------------------------------------------
Short-Term Income Fund                   October 19, 1994                           5.83%                    6.19%
--------------------------------------------------------------------------------------------------------------------
Equity Fund                              September 28, 1990                        15.18%                   15.78%
--------------------------------------------------------------------------------------------------------------------
Balanced Fund                            June 1, 1995                              14.04%                   15.17%
--------------------------------------------------------------------------------------------------------------------
Growth Equity Fund(1)                    June 30, 1994                             25.22%                   26.26%
--------------------------------------------------------------------------------------------------------------------
Small Cap Equity Fund                    February 17, 1999                         13.22%                   17.10%
--------------------------------------------------------------------------------------------------------------------
</TABLE>


         (1) The performance data for the Growth Equity Fund includes the
performance history of its predecessor fund, a common trust fund, for the period
from June 30, 1994 until the Growth Equity Fund commenced operations on November
3, 1997. The predecessor fund was not registered under the 1940 Act and
therefore was not subject to certain investment restrictions, limitations and
diversification requirements imposed by the 1940 Act and the Code. If the
predecessor fund had been subject to such requirements under the 1940 Act and
the Code its performance may have been adversely affected.

         Performance will fluctuate from time to time and is not necessarily
representative of future results. Accordingly, a Fund's performance may not
provide for comparison with bank deposits or other investments that pay a fixed
return for a stated period of time. Performance is a function of a Fund's
quality, composition, and maturity, as well as expenses allocated to the Fund.
Fees imposed upon Customer accounts by Participating Organizations will reduce a
Fund's effective yield to customers.

                                      B-48
<PAGE>   183
PERFORMANCE COMPARISONS
-----------------------

         Investors may judge the performance of the Funds by comparing their
performance to the performance of other mutual funds or mutual fund portfolios
with comparable investment objectives and policies through various mutual fund
or market indices such as the Morgan Stanley Capital International EAFE Index
and those prepared by Dow Jones & Co., Inc., Standard & Poor's Corporation,
Shearson Lehman Brothers, Inc. and The Russell 2000 Index and to data prepared
by Lipper, Inc., a widely recognized independent service which monitors the
performance of mutual funds, Morningstar, Inc. and the Consumer Price Index.
Comparisons may also be made to indices or data published in Donoghue's MONEY
FUND REPORT of Holliston, Massachusetts 01746, a nationally recognized money
market fund reporting service, Money Magazine, Forbes, Fortune, Ibbotson
Associates, Inc., CDA/Wiesenberger, American Banker, Institutional Investor,
Barron's, The Wall Street Journal, The Bond Buyer's Weekly 20-Bond Index, The
Bond Buyer's Index, The Bond Buyer, The New York Times, Business Week, Pensions
and Investments, U.S.A. Today and local newspapers. In addition to performance
information, general information about these Funds that appears in a publication
such as those mentioned above may be included in advertisements and in reports
to Shareholders.

         From time to time, the Funds may include the following types of
information in advertisements, supplemental sales literature and reports to
Shareholders: (1) discussions of general economic or financial principles (such
as the effects of inflation, the power of compounding and the benefits of
dollar-cost averaging); (2) discussions of general economic trends; (3)
presentations of statistical data to supplement such discussions; (4)
descriptions of past or anticipated portfolio holdings for one or more of the
Funds within the Trust; (5) descriptions of investment strategies for one or
more of such Funds; (6) descriptions or comparisons of various savings and
investment products (including but not limited to insured bank products,
annuities, qualified retirement plans and individual stocks and bonds) which may
or may not include the Funds; (7) comparisons of investment products (including
the Funds) with relevant market or industry indices or other appropriate
benchmarks; (8) discussions of fund rankings or ratings by recognized rating
organizations; and (9) testimonials describing the experience of persons that
have invested in one or more of the Funds. In addition, with respect to the
Intermediate Tax-Free Bond Fund, the benefits of tax-free investments may be
communicated to shareholders. For example, the Intermediate Tax-Free Bond Fund
may present information on the yield that a taxable investment must earn at
various income brackets to produce after-tax yields equivalent to those of the
tax-exempt investments.

         The Funds may also include calculations, such as hypothetical
compounding examples, which describe hypothetical investment results in such
communications. Such performance examples will be based on an express set of
assumptions and are not indicative of the performance of any of the Funds.

         Morningstar, Inc., Chicago, Illinois, rates mutual funds on a one- to
five-star rating scale with five stars representing the highest rating. Such
ratings are based upon a fund's historical risk/reward ratio as determined by
Morningstar relative to other funds in that fund's class. Funds are divided into
classes based upon their respective investment objectives. The one- to five-star

                                      B-49
<PAGE>   184
ratings represent the following ratings by Morningstar, respectively: Lowest,
Below Average, Neutral, Above Average and Highest.

         Current yields or performance will fluctuate from time to time and are
not necessarily representative of future results. Accordingly, a Fund's yield or
performance may not provide for comparison with bank deposits or other
investments that pay a fixed return for a stated period of time. Yield and
performance are functions of a Fund's quality, composition, and maturity, as
well as expenses allocated to the Fund.

         Fees imposed on its affiliated or correspondent banks for cash
management services will reduce a Fund's effective yield to Customers.

MISCELLANEOUS
-------------

         The Funds are not required to hold a meeting of Shareholders for the
purpose of electing Trustees except that (i) the Funds are required to hold a
Shareholders' meeting for the election of Trustees at such time as less than a
majority of the Trustees holding office have been elected by Shareholders and
(ii) if, as a result of a vacancy on the Board of Trustees, less than two-thirds
of the Trustees holding office have been elected by the Shareholders, that
vacancy may only be filled by a vote of the Shareholders. In addition, Trustees
may be removed from office by a written consent signed by the holders of Shares
representing two-thirds of the outstanding Shares of the Funds at a meeting duly
called for the purpose, which meeting shall be held upon the written request of
the holders of Shares representing not less than 10% of the outstanding Shares
of the Funds. Upon written request by the holders of Shares representing 1% of
the outstanding Shares of the Funds stating that such Shareholders wish to
communicate with the other Shareholders for the purpose of obtaining the
signatures necessary to demand a meeting to consider removal of a Trustee, the
Funds will provide a list of Shareholders or disseminate appropriate materials
(at the expense of the requesting Shareholders). Except as set forth above, the
Trustees may continue to hold office and may appoint successor Trustees.

         The Funds are registered with the SEC as a management investment
company. Such registration does not involve supervision by the Commission of the
management or policies of the Funds.

         The Prospectuses and this Statement of Additional Information omit
certain of the information contained in the Registration Statement filed with
the SEC. Copies of such information may be obtained from the Commission's
website at http://www.sec.gov or from the Commission upon payment of the
prescribed fee.

         The Prospectuses and this Statement of Additional Information are not
an offering of the securities herein described in any state in which such
offering may not lawfully be made. No salesman, dealer, or other person is
authorized to give any information or make any representation other than those
contained in the Prospectus and Statement of Additional Information.

                                      B-50
<PAGE>   185

         As of December 7, 2000, Bank of Oklahoma, N.A. (Bank of Oklahoma Tower,
One Williams Center, Tulsa, Oklahoma 74103) and its bank affiliates were the
Shareholder of record of 100% of the U.S. Treasury Fund's Shares, 100% of the
Cash Management Fund's Shares, 97% of the Bond Fund's Shares, 96% of the
Intermediate Bond Fund's Shares, 81% of the Intermediate Tax-Free Bond Fund's
Shares, 97% of the Short-Term Income Fund's Shares, 97% of the Equity Fund's
Shares, 100% of the Balanced Fund's Shares, 96% of the Growth Equity Fund's
Shares, and 100% of the Small Cap Equity Fund's Shares. As of December 7, 2000
Bank of Oklahoma, N.A. and its bank affiliates possessed, on behalf of its
underlying accounts, voting or investment power with respect to 23% of the U.S.
Treasury Fund's Shares, 24% of the Cash Management Fund's Shares, 77% of the
Bond Fund's Shares, 79% of the Intermediate Bond Fund's Shares, 78% of the
Intermediate Tax-Free Bond Fund's Shares, 96% of the Short-Term Income Fund's
Shares, 65% of the Equity Fund's Shares, 48% of the Balanced Fund's Shares, 81%
of the Growth Equity Fund's Shares, and 95% of the Small Cap Equity Fund's
Shares, and, as a consequence, Bank of Oklahoma, N.A. and its bank affiliates
may be deemed to be a controlling person of each Fund under the 1940 Act.

         As of December 7, 2000 the trustees and officers of the Funds, as a
group, owned less than one percent of the Shares of each of the Funds.

         The following table indicates each additional person known by the Funds
to own beneficially five percent (5%) or more of the Shares of the Funds as of
December 7, 2000:

<TABLE>
<CAPTION>
Name and Address                                                Percent of Fund
<S>                                                             <C>
                               U.S. Treasury Fund
                               ------------------

NABANK and Co.                                                           99.99%
P.O. Box 2180
Tulsa, OK  74192


                              Cash Management Fund
                              --------------------

NABANK and Co.                                                           99.92%
P.O. Box 2180
Tulsa, OK  74192


                                    Bond Fund
                                    ---------

NABANK and Co.                                                           94.70%
P.O. Box 2180
Tulsa, OK  74192
</TABLE>


                                      B-51
<PAGE>   186

<TABLE>
<S>                                                             <C>
                             Intermediate Bond Fund
                             ----------------------

NABANK and Co.                                                           93.00%
P.O. Box 2180
Tulsa, OK  74192


                         Intermediate Tax-Free Bond Fund
                         -------------------------------

NABANK and Co.                                                           76.25%
P.O. Box 2180
Tulsa, OK  74192


                             Short Term Income Fund
                             ----------------------

NABANK and Co.
24.35%167
All Reinvest Account
P.O. Box 2180
Tulsa, OK  74192

NABANK and Co.                                                           64.53%
Income
Cash/CG/Reinvest
P.O. Box 2180
Tulsa, OK  74192

NABANK and Co.                                                           8.133%
P.O. Box 2180170
Tulsa, OK  74192171


                                   Equity Fund
                                   -----------

NABANK and Co.                                                           96.58%
P.O. Box 2180
Tulsa, OK  74192


                                  Balanced Fund
                                  -------------

NABANK and Co.                                                           99.72%
P.O. Box 2180
Tulsa, OK  74192
</TABLE>


                                      B-52
<PAGE>   187

<TABLE>
<S>                                                             <C>
                               Growth Equity Fund
                               ------------------

NABANK and Co.                                                           92.63%
P.O. Box 2180
Tulsa, OK  74192


                              Small Cap Equity Fund

NABANK and Co.                                                           97.25%
P.O. Box 2180
Tulsa, OK  74192
</TABLE>


                                      B-53
<PAGE>   188
                              FINANCIAL STATEMENTS


         The Independent Auditors' Report, Financial Highlights, and Financial
Statements included in the American Performance Funds' Annual Report for the
fiscal year ended August 31, 2000, are incorporated by reference into this
Statement of Additional Information. A copy of the Annual Report dated as of
August 31, 2000 may be obtained without charge by contacting the Distributor,
BISYS Fund Services at 3435 Stelzer Road, Columbus, Ohio 43219 or by telephoning
toll-free at 1-800-762-7085.


                                      B-54
<PAGE>   189
APPENDIX


The nationally recognized statistical rating organizations (individually, an
"NRSRO") that may be utilized by the Funds with regard to portfolio investments
for the Funds include Moody's Investors Service, Inc. ("Moody's"), Standard &
Poor's Corporation ("S&P"), Fitch IBCA, Duff & Phelps ("Fitch IBCA"), and
Thomson BankWatch, Inc. ("Thomson"). Set forth below is a description of the
relevant ratings of each such NSRO. The NSROs that may be utilized by the Funds
and the description of each NSRO's ratings is as of the date of this Statement
of Additional Information, and may subsequently change.


Long -Term Debt Ratings (may be assigned, for example, to corporate and
municipal bonds)

Description of the five highest long-term debt ratings by Moody's (Moody's
applies numerical modifiers (1,2, and 3) in each rating category to indicate the
security's ranking within the category):

Aaa      Bonds which are rated Aaa are judged to be of the best quality. They
         carry the smallest degree of investment risk and are generally referred
         to as "gilt edged." Interest payments are protected by a large or by an
         exceptionally stable margin and principal is secure. While the various
         protective elements are likely to change, such changes as can be
         visualized are most unlikely to impair the fundamentally strong
         position of such issues.

Aa       Bonds which are rated Aa are judged to be of high quality by all
         standards. Together with the Aaa group they comprise what are generally
         known as high-grade bonds. They are rated lower than the best bonds
         because margins of protection may not be as large as in Aaa securities
         or fluctuation of protective elements may be of greater amplitude or
         there may be other elements present which make the long-term risk
         appear somewhat larger than the Aaa securities.

A        Bonds which are rated A possess many favorable investment attributes
         and are to be considered as upper-medium-grade obligations. Factors
         giving security to principal and interest are considered adequate, but
         elements may be present which suggest a susceptibility to impairment
         some time in the future.

Baa      Bonds which are rated Baa are considered as medium-grade obligations
         (i.e., they are neither highly protected nor poorly secured). Interest
         payments and principal security appear adequate for the present but
         certain protective elements may be

                                      B-55
<PAGE>   190
         lacking or may be characteristically unreliable over any great length
         of time. Such bonds lack outstanding investment characteristics and in
         fact have speculative characteristics as well.

Ba       Bonds which are rated Ba are judged to have speculative elements; their
         future cannot be considered as well-assured. Often the protection of
         interest and principal payments may be very moderate, and thereby not
         well safeguarded during both good and bad times over the future.
         Uncertainty of position characterizes bonds in this class.


         Description of the five highest long-term debt ratings by S & P (S&P
may apply a plus (+) or minus (-) to a particular rating classification to show
relative standing within that classification):

AAA      An obligation rated 'AAA' has the highest rating assigned by Standard &
         Poor's. The obligor's capacity to meet its financial commitment on the
         obligation is extremely strong.

AA       An obligation rated 'AA' differs from the highest rated obligations
         only in small degree. The obligor's capacity to meet its financial
         commitment on the obligation is very strong.

A        An obligation rated 'A' is somewhat more susceptible to the adverse
         effects of changes in circumstances and economic conditions than
         obligations in higher rated categories. However, the obligor's capacity
         to meet its financial commitment on the obligation is still strong.

BBB      An obligation rated 'BBB' exhibits adequate protection parameters.
         However, adverse economic conditions or changing circumstances are more
         likely to lead to a weakened capacity of the obligor to meet its
         financial commitment on the obligation. Obligations rated 'BB', 'B',
         'CCC', 'CC', and 'C' are regarded as having significant speculative
         characteristics. 'BB' indicates the least degree of speculation and 'C'
         the highest. While such obligations will likely have some quality and
         protective characteristics, these may be outweighed by large
         uncertainties or major exposures to adverse conditions.

BB       An obligation rated 'BB' is less vulnerable to nonpayment than other
         speculative issues. However, it faces major ongoing uncertainties or
         exposure to adverse business, financial, or economic conditions which
         could lead to the obligor's inadequate capacity to meet its financial
         commitment on the obligation.

Description of the three highest long-term debt ratings by Fitch IBCA:

                                      B-56
<PAGE>   191
AAA      Highest credit quality. `AAA' ratings denote the lowest expectation of
         credit risk. They are assigned only in case of exceptionally strong
         capacity for timely payment of financial commitments. This capacity is
         highly unlikely to be adversely affected by foreseeable events.


AA       Very high credit quality. `AA' ratings denote a very low expectation of
         credit risk. They indicate very strong capacity for timely payment of
         financial commitments. This capacity is not significantly vulnerable to
         foreseeable events.

A        High credit quality. `A' ratings denote a low expectation of credit
         risk. The capacity for timely payment of financial commitments is
         considered strong. This capacity may, nevertheless, be more vulnerable
         to changes in circumstances or in economic conditions than is the case
         for higher ratings.

Short -Term Debt Ratings (may be assigned, for example, to commercial paper,
master demand notes, bank instruments, and letters of credit)

Moody's description of its three highest short-term debt ratings:

Prime-1  Issuers rated Prime-1 (or supporting institutions) have a superior
         ability for repayment of senior short-term debt obligations. Prime-1
         repayment ability will often be evidenced by many of the following
         characteristics:

                  - Leading market positions in well-established industries.

                  - High rates of return on funds employed.

                           - Conservative capitalization structure with moderate
                             reliance on debt and ample asset protection.

                           - Broad margins in earnings coverage of fixed
                             financial charges and high internal cash
                             generation.

                           - Well-established access to a range of financial
                             markets and assured sources of alternate liquidity.

Prime-2  Issuers rated Prime-2 (or supporting institutions) have a strong
         ability for repayment of senior short-term debt obligations. This will
         normally be evidenced by many of the characteristics cited above but to
         a lesser degree. Earnings trends and coverage ratios, while sound, may
         be more subject to variation. Capitalization characteristics, while
         still appropriate, may be more affected by external conditions. Ample
         alternate liquidity is maintained.

Prime-3  Issuers rated Prime-3 (or supporting institutions) have an acceptable
         ability for repayment of senior short-term obligations. The effect of
         industry

                                      B-57
<PAGE>   192
         characteristics and market compositions may be more pronounced.
         Variability in earnings and profitability may result in changes in the
         level of debt protection measurements and may require relatively high
         financial leverage. Adequate alternate liquidity is maintained.

S & P's description of its three highest short-term debt ratings:

A-1      A short-term obligation rated 'A-1' is rated in the highest category by
         Standard & Poor's. The obligor's capacity to meet its financial
         commitment on the obligation is strong. Within this category, certain
         obligations are designated with a plus sign (+). This indicates that
         the obligor's capacity to meet its financial commitment on these
         obligations is extremely strong.

A-2      A short-term obligation rated 'A-2' is somewhat more susceptible to the
         adverse effects of changes in circumstances and economic conditions
         than obligations in higher rating categories. However, the obligor's
         capacity to meet its financial commitment on the obligation is
         satisfactory.

A-3      A short-term obligation rated 'A-3' exhibits adequate protection
         parameters. However, adverse economic conditions or changing
         circumstances are more likely to lead to a weakened capacity of the
         obligor to meet its financial commitment on the obligation.

Fitch IBCA's description of its three highest short-term debt ratings:

F1       Highest credit quality. Indicates the Best capacity for timely payment
         of financial commitments; may have an added "+" to denote any
         exceptionally strong credit feature.

F2       Good credit quality. A satisfactory capacity for timely payment of
         financial commitments, but the margin of safety is not as great as in
         the case of the higher ratings.

F3       Fair credit quality. The capacity for timely payment of financial
         commitments is adequate; however, near-term adverse changes could
         result in a reduction to non-investment grade.

Short-Term Loan/Municipal Note Ratings


Moody's description of its two highest short-term loan/municipal note ratings:

MIG1/VMIG 1       This designation denotes superior credit quality. Excellent
                  protection is afforded by established cash flows, highly
                  reliable liquidity support, or demonstrated broad-based access
                  to the market for refinancing.

                                      B-58
<PAGE>   193
MIG 2/VMIG 2      This designation denotes strong credit quality. Margins of
                  protection are ample, although not as large as in the
                  preceding group.

SHORT-TERM DEBT RATINGS
-----------------------


         Thomson BankWatch, Inc. ("TBW") ratings are based upon a qualitative
and quantitative analysis of all segments of the organization including, where
applicable, holding company and operating subsidiaries.


         BankWatch(TM) Ratings do not constitute a recommendation to buy or sell
securities of any of these companies. Further, BankWatch does not suggest
specific investment criteria for individual clients.


The TBW Short-Term Ratings apply to commercial paper, other senior short-term
obligations and deposit obligations of the entities to which the rating has been
assigned.

The TBW Short-Term Rating apply only to unsecured instruments that have a
maturity of one year or less.

The TBW Short-Term Ratings specifically assess the likelihood of an untimely
payment of principal or interest.

TBW-1    THE HIGHEST CATEGORY; INDICATES A VERY HIGH LIKELIHOOD THAT PRINCIPAL
         AND INTEREST WILL BE PAID ON A TIMELY BASIS.

TBW-2    The second-highest category; while the degree of safety regarding
         timely repayment of principal and interest is strong, the relative
         degree of safety is not as high as for issues rated TBW-1.

TBW-3    The lowest investment-grade category; indicates that while the
         obligation is more susceptible to adverse developments (both internal
         and external) than those with higher ratings, the capacity to service
         principal and interest in a timely fashion is considered adequate.

TBW-4    The lowest rating category; this rating is regarded as non investment
         grade and therefore speculative.

                                      B-59
<PAGE>   194


                             REGISTRATION STATEMENT
                                       OF
                           AMERICAN PERFORMANCE FUNDS
                                       ON
                                    FORM N-1A

PART C.  OTHER INFORMATION

Item 23. EXHIBITS

         (a)          Agreement and Declaration of Trust dated October 1, 1987,
                      as amended and restated on August 20, 1990 is incorporated
                      by reference to Exhibit 1 to Post-Effective Amendment No.
                      1 to the Funds' Registration Statement (filed October 31,
                      1990).

         (b)(1)       Bylaws as approved and adopted by Registrant's Board of
                      Trustees is incorporated by reference to Exhibit 2 to
                      Post-Effective Amendment No. 1 to the Funds' Registration
                      Statement (filed October 31, 1990).

         (b)(2)       Certified Resolution of the Registrant's Board of Trustees
                      amending the Registrant's Bylaws as adopted by a unanimous
                      vote at a meeting of the Board of Trustees on October 25,
                      1991 is incorporated by reference to Exhibit 2(b) to
                      Post-Effective Amendment No. 3 to the Funds' Registration
                      Statement (filed November 26, 1991).

         (b)(3)       Certified Resolution of the Registrant's Board of Trustees
                      amending the Registrant's Bylaws as adopted by a unanimous
                      vote at a meeting of the Board of Trustees on October 25,
                      1991 is incorporated by reference to Exhibit 2(b) to
                      Post-Effective Amendment No. 3 to the Funds' Registration
                      Statement (filed November 26, 1991).

         (c)          Article III, Section 4 and 5, Article V, Article VIII,
                      Section 4, and Article IX, Sections 1, 4, 5 and 7 of the
                      Agreement and Declaration of Trust dated October 1, 1987,
                      as amended and restated on August 20, 1990 is incorporated
                      by reference to Exhibit 1 to Post-Effective Amendment No.
                      1 to the Funds' Registration Statement (filed October 31,
                      1990).

                      Article 9, Article 10, Section 6 and Article 11 of the
                      Bylaws as approved and adopted by Registrant's Board of
                      Trustees is incorporated by reference to Exhibit 2 to
                      Post-Effective Amendment No. 1 to the Funds' Registration
                      Statement (filed October 31, 1990).

<PAGE>   195


         (d)(1)       Investment Advisory Agreement between Registrant and Bank
                      of Oklahoma, N.A. (formerly BancOklahoma Trust Company)
                      dated October 1, 1994 is incorporated by reference to
                      Exhibit (5)(a) to Post-Effective Amendment No. 11 to the
                      Funds' Registration Statement (filed February 13, 1995).

         (d)(2)       Investment Advisory Agreement between Registrant and Bank
                      of Oklahoma, N.A. dated July 25, 1997 is incorporated by
                      reference to Exhibit (d)(2) to Post-Effective Amendment
                      No. 20 to the Funds' Registration Statement (filed October
                      29, 1999).

         (d)(3)       Sub-Investment Advisory Agreement between Bank of
                      Oklahoma, N.A. and AMR Investment Services, Inc. dated
                      June 16, 1997 is incorporated by reference to Exhibit 5(b)
                      to Post-Effective Amendment No. 16 to the Funds'
                      Registration Statement (filed December 17, 1997).

         (d)(4)       Amended Schedule A dated January 21, 1999 to the
                      Investment Advisory Agreement between Registrant and Bank
                      of Oklahoma, N.A. dated July 25, 1997 is incorporated by
                      reference to Exhibit (d)(4) to Post-Effective Amendment
                      No. 20 to the Funds' Registration Statement (filed October
                      29, 1999).

         (e)(1)       Distribution Agreement between Registrant and BISYS Fund
                      Services, LP (formerly, The Winsbury Company Limited
                      Partnership) is incorporated by reference to Exhibit 6(a)
                      to Post-Effective Amendment No. 6 to the Funds'
                      Registration Statement (filed December 7, 1993).

         (e)(2)       Amended Schedules A and B dated January 21, 1999 to
                      Distribution Agreement between Registrant and BISYS Fund
                      Services, LP (formerly, The Winsbury Company Limited
                      Partnership) dated October 1, 1993 are incorporated by
                      reference to Exhibit (e)(2) to Post-Effective Amendment
                      No. 20 to the Funds' Registration Statement (filed October
                      29, 1999).

         (f)          None.

         (g)(1)       Custodian Agreement between Registrant and Bank of
                      Oklahoma, N.A. is incorporated by reference to Exhibit
                      8(a) to Post-Effective Amendment No. 1 to the Funds'
                      Registration Statement (filed October 31, 1990).

         (g)(2)       Amended Schedule A dated January 21, 1999 to Custodian
                      Agreement dated September 5, 1990 between Registrant and
                      Bank of Oklahoma,



                                      C-2
<PAGE>   196


                      N.A. is incorporated by reference to Exhibit (g)(2) to
                      Post-Effective Amendment No. 20 to the Funds' Registration
                      Statement (filed October 29, 1999).

         (h)(1)       Management and Administration Agreement between Registrant
                      and BISYS Fund Services, LP (formerly The Winsbury Company
                      Limited Partnership) dated September 5, 1990, as amended
                      and restated on May 12, 1995, is incorporated by reference
                      to Exhibit 9(a) to Post-Effective Amendment No. 13 to the
                      Funds' Registration Statement (filed October 31, 1995).

         (h)(2)       Administration Agreement between Registrant and BISYS Fund
                      Services Ohio, Inc. dated September 15, 1999 is
                      incorporated by reference to Exhibit (h)(2) to
                      Post-Effective Amendment No. 20 to the Funds' Registration
                      Statement (filed October 29, 1999).

         (h)(3)       Transfer Agency and Shareholder Service Agreement between
                      Registrant and BISYS Fund Services Ohio, Inc. (formerly,
                      The Winsbury Service Corporation) is incorporated by
                      reference to Exhibit 9(b) to Post-Effective Amendment No.
                      1 to the Funds' Registration Statement (filed October 31,
                      1990).

         (h)(4)       Transfer Agency Agreement between Registrant and BISYS
                      Fund Services Ohio, Inc. dated September 15, 1999 is
                      incorporated by reference to Exhibit (h)(4) to
                      Post-Effective Amendment No. 20 to the Funds' Registration
                      Statement (filed October 29, 1999).

         (h)(5)       Fund Accounting Agreement between Registrant and BISYS
                      Fund Services Ohio, Inc. (formerly, The Winsbury Service
                      Corporation) dated September 5, 1990, as amended and
                      restated May 12, 1995, is incorporated by reference to
                      Exhibit 9(d) to Post-Effective Amendment No. 15 to the
                      Funds' Registration Statement (filed June 24, 1997).

         (h)(6)       Fund Accounting Agreement between Registrant and BISYS
                      Fund Services Ohio, Inc. dated September 15, 1999, is
                      incorporated by reference to Exhibit (h)(6) to
                      Post-Effective Amendment No. 20 to the Funds' Registration
                      Statement (filed October 29, 1999).

         (h)(7)       Sub-Administration Agreement between BISYS Fund Services,
                      Limited Partnership and Bank of Oklahoma, N.A. dated July
                      25, 1997 is incorporated by reference to Exhibit 9(f) to
                      Post-Effective Amendment No. 16 to the Funds' Registration
                      Statement (filed December 17, 1997).



                                      C-3
<PAGE>   197


         (h)(8)       Sub-Administration Agreement between BISYS Fund Services,
                      Ohio, Inc. and Bank of Oklahoma, N.A. dated September 15,
                      1999, is incorporated by reference to Exhibit (h)(8) to
                      Post-Effective Amendment No. 20 to the Funds' Registration
                      Statement (filed October 29, 1999).

         (i)          Opinion of Ropes & Gray is filed herewith.

         (j)(1)       Consent of  KPMG LLP is filed herewith.

         (j)(2)       Consent of Ropes & Gray is filed herewith.

         (k)          Omitted Financial Statements:  None.

         (l)          Purchase Agreement dated August 3, 1990 between Registrant
                      and Winsbury Associates is incorporated by reference to
                      Exhibit 13 to Post-Effective Amendment No. 1 to the Funds'
                      Registration Statement (filed October 31, 1990).

         (m)(1)       Amended and Restated Distribution and Shareholder Services
                      Plan dated October 1, 1993 is incorporated by reference to
                      Exhibit 15(a) to Post-Effective Amendment No. 7 to the
                      Funds' Registration Statement (filed December 16, 1993).

         (m)(2)       Servicing Agreement with Respect to Shareholder Services
                      to be utilized in connection with Distribution and
                      Shareholder Services Plan is incorporated by reference to
                      Exhibit 15(b) to Pre-Effective Amendment No. 1 to the
                      Funds' Registration Statement (filed August 29, 1990).

         (m)(3)       Servicing Agreement with Respect to Distribution
                      Assistance and Shareholder Services to be utilized in
                      connection with Distribution and Shareholder Services Plan
                      is incorporated by reference to Exhibit 15(c) to
                      Pre-Effective Amendment No. 1 to the Funds' Registration
                      Statement (filed August 29, 1990).

         (m)(4)       Amended Schedule A to Amended and Restated Distribution
                      and Shareholder Services Plan dated October 1, 1993, is
                      incorporated by reference to Exhibit (m)(4) to
                      Post-Effective Amendment No. 20 to the Funds' Registration
                      Statement (filed October 29, 1999).

         (o)          None.



                                      C-4
<PAGE>   198


         (p)(1)       Code of Ethics for the American Performance Funds is
                      incorporated by reference to Exhibit (p)(1) to
                      Post-Effective Amendment No. 22 to the Funds' Registration
                      Statement (filed September 25, 2000).

         (p)(2)       Code of Ethics for Bank of Oklahoma, N.A. is incorporated
                      by reference to Exhibit (p)(1) to Post-Effective Amendment
                      No. 22 to the Funds' Registration Statement (filed
                      September 25, 2000).

         (p)(3)       Code of Ethics for BISYS Fund Services is incorporated by
                      reference to Exhibit (p)(1) to Post-Effective Amendment
                      No. 22 to the Funds' Registration Statement (filed
                      September 25, 2000).


Item 24. PERSONS CONTROLLED BY OR UNDER COMMON CONTROL WITH REGISTRANT

         There are no persons controlled or under common control with the
         Registrant.

Item 25. INDEMNIFICATION

         Article VIII of Registrant's Agreement and Declaration of Trust, filed
         or incorporated by reference as Exhibit (1) hereto, provides for the
         indemnification of Registrant's trustees and officers. Indemnification
         of Registrant's principal underwriter is provided for in the Agreement
         between Registrant and that service provider as filed or incorporated
         by reference as Exhibits hereto. As of the effective date of this
         Registration Statement, Registrant has obtained from a major insurance
         carrier a trustees and officers' liability policy covering certain
         types of errors and omissions. In no event will Registrant indemnify
         any of its trustees, officers, employees, or agents against any
         liability to which such person would otherwise be subject by reason of
         his willful misfeasance, bad faith, or gross negligence in the
         performance of his duties, or by reason of his reckless disregard of
         the duties involved in the conduct of his office or under his agreement
         with Registrant. Registrant will comply with Rule 484 under the
         Securities Act of 1933 and Release 11330 under the Investment Company
         Act of 1940 in connection with any indemnification.

         Insofar as indemnification for liability arising under the Securities
         Act of 1933 may be permitted to trustees, officers, and controlling
         persons of Registrant pursuant to the foregoing provisions, or
         otherwise, Registrant has been advised that in the opinion of the
         Securities and Exchange Commission such indemnification is against
         public policy as expressed in the Act and is, therefore, unenforceable.
         In the event that a claim for indemnification against such liabilities
         (other than the payment by Registrant of expenses incurred or paid by a
         trustee, officer or controlling person of Registrant in the successful
         defense of any action, suit or



                                      C-5
<PAGE>   199


         proceeding) is asserted by such trustee, officer, or controlling person
         in connection with the securities being registered, Registrant will,
         unless in the opinion of its counsel the matter has been settled by
         controlling precedent, submit to a court of appropriate jurisdiction
         the question of whether such indemnification by it is against public
         policy as expressed in the Act and will be governed by the final
         adjudication of such issue.

Item 26. BUSINESS AND OTHER CONNECTIONS OF INVESTMENT ADVISER

         Bank of Oklahoma, N.A. ("BOK") serves as Registrant's investment
         adviser.

         To the knowledge of Registrant, none of the directors or officers of
         BOK except those set forth below is or has been, at any time during the
         past two calendar years, engaged in any other business, profession,
         vocation or employment of a substantial nature. Set forth below are the
         names and principal businesses of the directors of BOK who are engaged
         in any other business, profession, vocation or employment of a
         substantial nature.

                             BANK OF OKLAHOMA, N.A.

<TABLE>
<CAPTION>
         Name and Position With           Other
         Bank of Oklahoma                 Substantial                                       Type of
         N.A.                             Occupation                                        Business
         ----------------------           -----------                                       --------
         <S>                              <C>                                               <C>
         W. Wayne Allen                   Chairman and Chief Executive Officer,             Oil
         Director                          Phillips Petroleum Company, 18
                                           Phillips Building, Bartlesville, OK 74004

         Keith E. Bailey                  Chairman, President and Chief                     Oil, Gas and
         Director                          Executive Officer, The Williams                  Telecommunications
                                           Companies, Inc., P.O. Box 2400,
                                           Tulsa, OK 74102

         Glenn A. Cox                     (Retired President and Chief Operating            Oil
         Director                          Officer, Phillips Petroleum Company),
                                           401 SE Dewey, Suite 318,
                                           Bartlesville, OK 74003

         Dr. Robert H. Donaldson          (Former President, University of                  Education
         Director                          Tulsa), 6449 S. Richmond, Tulsa, OK 74136
</TABLE>



                                      C-6
<PAGE>   200


<TABLE>
         <S>                              <C>                                               <C>
         James O. Goodwin                  Chief  Executive Officer, The Oklahoma            Publishing
         Director                          Eagle Publ. Co., 624 East Archer,
                                           Tulsa, OK 74120


         D. Joseph Graham                 Vice President and Chief Financial                Oil
         Director                          Officer, Kaiser-Francis Oil Company,
                                           P.O. Box 21468, Tulsa, OK 74121-1468

         V. Burns Hargis                  None
         Director and Vice Chairman

         Eugene A. Harris                 None
         Director and Executive
         Vice President

         E. Carey Joullian IV             President, Mustang Fuel Corporation,              Energy
         Director                          2000 Classen Blvd., 800E, Oklahoma
                                           City, OK 73106-6036

         George  B. Kaiser                President and Owner, Kaiser-Francis               Oil
         Director and                      Oil Co., P.O. Box 21468, Tulsa, OK
         Chairman of the Board             74121-1468


         David R. Lopez                   President, Oklahoma Southwestern Bell             Telecommunications
         Director                          Telephone, 800 North Harvey, Oklahoma
                                           City, OK 73102

         Stanley  A. Lybarger             None
         Director, President and
         Chief Executive Officer

         Frank A. McPherson               (Retired Chairman and Chief Executive             Oil
         Director                          Officer Kerr-McGee Corporation), The
                                           Oil Center, 2601 Northwest Expressway,
                                           Suite 805E, Oklahoma City, OK 73112

</TABLE>



                                      C-7
<PAGE>   201


<TABLE>
         <S>                              <C>                                               <C>
         J. Larry Nichols                 Chief Executive Officer and President,            Energy
         Director                          Devon Energy Corporation, 20 North
                                           Broadway, Suite 1500, Oklahoma City,
                                           OK 73102-8260

         James W. Pielsticker             President, Arrow Trucking Company,                Trucking
         Director                          4230 South Elwood, P.O. Box 3750,
                                           Tulsa, OK 74101

         E.C. "Kip" Richards              Senior Vice President of Operations,              Oil
         Director                          Sooner Pipe and Supply Corporation,
                                           MidContinent Tower, 10th Floor, 401
                                           S. Boston, Tulsa, OK 74103

         L. Francis Rooney, III           Chairman and Chief Executive Officer,             Construction
         Director                          Manhattan Construction Company, 111
                                           W. 5th Street, Suite 1000, Tulsa, OK
                                           74103-4253

         James A. White                   None
         Director, Executive Vice
         President and Chief
         Financial Officer
</TABLE>





The address of Bank of Oklahoma, N.A. is P.O. Box 2300, Tulsa, Oklahoma  74192.

The address of the BOK Financial Corporation is One Williams Center, Bank of
Oklahoma Tower, Tulsa, Oklahoma 74192.




                                      C-8
<PAGE>   202


Item 27.  PRINCIPAL UNDERWRITER

     (a)       BISYS Fund Services, Limited Partnership acts as distributor and
               administrator for Registrant. BISYS Fund Services also
               distributes the securities of the following investment companies:
               Alpine Equity Trust, American Independence Funds Trust, American
               Performance Funds, AmSouth Funds, BB&T Funds, The Coventry Group,
               The Eureka Funds, Fifth Third Funds, Governor Funds, Hirtle
               Callaghan Trust, HSBC Funds Trust and HSBC Mutual Funds Trust,
               The Infinity Mutual Funds, Inc., Magna Funds, Mercantile Mutual
               Funds, Inc., Metamarkets.com, Meyers Investment Trust, MMA Praxis
               Mutual Funds, M.S.D.&T. Funds, Old Westbury Funds, Inc., Pacific
               Capital Funds, Republic Advisor Funds Trust, Republic Funds
               Trust, Summit Investment Trust, USAllianz Variable Insurance
               Products Trust, Variable Insurance Funds, The Victory Portfolios,
               The Victory Variable Insurance Funds, Vintage Mutual Funds, Inc.,
               and WHATIFI Funds.

     (b)       Partners of BISYS Fund Services as of the date of this Part C are
               as follows:

<TABLE>
<CAPTION>
                                         Positions and                       Positions and
Name and Principal                       Offices with                        Offices with
Business Address                         BISYS Fund Services                 Registrant
----------------                         -------------------                 ----------
<S>                                      <C>                                 <C>
BISYS Fund Services, Inc.                Sole General Partner                None
3435 Stelzer Road
Columbus, Ohio 43219

WC Subsidiary Corporation                Sole Limited Partner                None
150 Clove Road
Little Falls, NJ 07424
</TABLE>


Each of these corporations is a subsidiary of The BISYS Group, Inc., 150 Clove
Road, Little Falls, NJ 07424.

Item 28. LOCATION OF ACCOUNTS AND RECORDS

         (1)      Bank of Oklahoma, N.A. , Bank of Oklahoma Tower, Tulsa,
                  Oklahoma 74103 (records relating to its functions as
                  Investment Adviser).

         (2)      AMR Investment Services, Inc., P.O. Box 619003, Dallas/Ft.
                  Worth Airport, Texas 75261-9003 (records relating to its
                  function as former Sub-Investment Adviser).

         (3)      BISYS Fund Services, LP, 3435 Stelzer Road, Columbus, Ohio
                  43219 (records relating to its functions as Distributor).



                                      C-9
<PAGE>   203


         (4)      BISYS Fund Services Ohio, Inc., 3435 Stelzer Road, Columbus,
                  OH 43219 (records relating to its functions as Administrator,
                  Transfer Agent, and Fund Accountant).

         (5)      Bank of Oklahoma, N.A., Bank of Oklahoma Tower, Tulsa,
                  Oklahoma 74103 (records relating to its functions as
                  Custodian).

         (6)      Ropes & Gray, One Franklin Square, 1301 K Street, N.W., Suite
                  800 East, Washington, D.C. 20005 (Agreement and Declaration of
                  Trust, Bylaws and Minute Books).

Item 29. MANAGEMENT SERVICES

         N/A.

Item 30. UNDERTAKINGS

         (a)      Registrant undertakes to call a meeting of shareholders, at
                  the request of holders of 10% of the Registrant's outstanding
                  shares, for the purpose of voting upon the question of removal
                  of a trustee or trustees and undertakes to assist in
                  communications with other shareholders as required by Section
                  16(c) of the Investment Company Act of 1940.

         (b)      The Registrant undertakes to furnish to each person to whom a
                  prospectus is delivered a copy of the Registrant's latest
                  annual report to shareholders upon request and without charge.









                                      C-10
<PAGE>   204

                                   SIGNATURES

      Pursuant to the requirements of the Securities Act of 1933 and the
Investment Company Act of 1940, as amended, the Registrant certifies that it
meets all the requirements for effectiveness of this Registration Statement
under Rule 485(b) under the Securities Act and has duly caused this Amendment
No. 25 to the Registration Statement to be signed on its behalf by the
undersigned, duly authorized, in the City of Washington, District of Columbia on
the 28th day of December 2000.

                                                      American Performance Funds
                                                      Registrant

                                                         */S/WALTER B. GRIMM
                                                         -----------------------
                                                         Walter B. Grimm
                                                         President

 Pursuant to the requirements of the Securities Act of 1933, this Post-Effective
Amendment No. 25 to the Registration Statement has been signed below by the
following persons in the capacity and on the date indicated.

<TABLE>
<CAPTION>
SIGNATURE                                                TITLE                                DATE
---------                                                -----                                ----
<S>                                                      <C>                                  <C>
*/S/WALTER B. GRIMM                                      Chairman, President                  December 28, 2000
------------------------                                 and Trustee
 Walter B. Grimm

*/S/JEFFREY SHIVERDECKER                                 Treasurer                            December 28, 2000
------------------------
 Jeffrey Shiverdecker

*/S/MICHAEL J. HALL                                      Trustee                              December 28, 2000
------------------------
 Michael J. Hall

*/S/PERRY A. WIMPEY                                      Trustee                              December 28, 2000
------------------------
 Perry A. Wimpey

*/S/I. EDGAR HENDRIX                                     Trustee                              December 28, 2000
------------------------
 I. Edgar Hendrix

* BY: /S/ALAN G. PRIEST
------------------------
 Alan G. Priest, As
 Attorney-in-Fact Pursuant
 to Powers of Attorney Filed Herewith.
</TABLE>





<PAGE>   205

POWER OF ATTORNEY

         Michael J. Hall, whose signature appears below, does hereby constitute
and appoint Martin E. Lybecker, Alan G. Priest, and Maryellen M. Lundquist, each
individually, his true and lawful attorneys and agents, with power of
substitution or resubstitution, to do any and all acts and things and to execute
any and all instruments which said attorneys and agents, each individually, may
deem necessary or advisable or which may be required to enable the American
Performance Funds (the "Trust"), to comply with the Investment Company Act of
1940, as amended, and the Securities Act of 1933, as amended ("Acts"), and any
rules, regulations or requirements of the Securities and Exchange Commission in
respect thereof, in connection with the filing and effectiveness of any and all
amendments to the Trust's Registration Statement on Form N-1A pursuant to said
Acts, including specifically, but without limiting the generality of the
foregoing, the power and authority to sign in the name and on behalf of the
undersigned as a trustee and/or officer of the Trust any and all such amendments
filed with the Securities and Exchange Commission under said Acts, and any other
instruments or documents related thereto, and the undersigned does hereby ratify
and confirm all that said attorneys and agents, or either of them, shall do or
cause to be done by virtue thereof.

Dated:  July 25, 1997                            /S/ MICHAEL J. HALL
                                                 -------------------------------
                                                     Michael J. Hall


<PAGE>   206


                                POWER OF ATTORNEY

         Perry A. Wimpey, whose signature appears below, does hereby constitute
and appoint Martin E. Lybecker, Alan G. Priest, and Maryellen M. Lundquist, each
individually, his true and lawful attorneys and agents, with power of
substitution or resubstitution, to do any and all acts and things and to execute
any and all instruments which said attorneys and agents, each individually, may
deem necessary or advisable or which may be required to enable the American
Performance Funds (the "Trust"), to comply with the Investment Company Act of
1940, as amended, and the Securities Act of 1933, as amended ("Acts"), and any
rules, regulations or requirements of the Securities and Exchange Commission in
respect thereof, in connection with the filing and effectiveness of any and all
amendments to the Trust's Registration Statement on Form N-1A pursuant to said
Acts, including specifically, but without limiting the generality of the
foregoing, the power and authority to sign in the name and on behalf of the
undersigned as a trustee and/or officer of the Trust any and all such amendments
filed with the Securities and Exchange Commission under said Acts, and any other
instruments or documents related thereto, and the undersigned does hereby ratify
and confirm all that said attorneys and agents, or either of them, shall do or
cause to be done by virtue thereof.

Dated:  July 25, 1997                            /S/ PERRY A. WIMPEY
                                                 -------------------------------
                                                     Perry A. Wimpey


<PAGE>   207


                                POWER OF ATTORNEY

         I. Edgar Hendrix, whose signature appears below, does hereby constitute
and appoint Martin E. Lybecker, Alan G. Priest, and Maryellen M. Lundquist, each
individually, his true and lawful attorneys and agents, with power of
substitution or resubstitution, to do any and all acts and things and to execute
any and all instruments which said attorneys and agents, each individually, may
deem necessary or advisable or which may be required to enable the American
Performance Funds (the "Trust"), to comply with the Investment Company Act of
1940, as amended, and the Securities Act of 1933, as amended ("Acts"), and any
rules, regulations or requirements of the Securities and Exchange Commission in
respect thereof, in connection with the filing and effectiveness of any and all
amendments to the Trust's Registration Statement on Form N-1A pursuant to said
Acts, including specifically, but without limiting the generality of the
foregoing, the power and authority to sign in the name and on behalf of the
undersigned as a trustee and/or officer of the Trust any and all such amendments
filed with the Securities and Exchange Commission under said Acts, and any other
instruments or documents related thereto, and the undersigned does hereby ratify
and confirm all that said attorneys and agents, or either of them, shall do or
cause to be done by virtue thereof.

Dated:  July 25, 1997                            /S/ I. EDGAR HENDRIX
                                                 -------------------------------
                                                     I. Edgar Hendrix


<PAGE>   208


                                POWER OF ATTORNEY

         Walter B. Grimm, whose signature appears below, does hereby constitute
and appoint Martin E. Lybecker, Alan G. Priest, and Maryellen M. Lundquist, each
individually, his true and lawful attorneys and agents, with power of
substitution or resubstitution, to do any and all acts and things and to execute
any and all instruments which said attorneys and agents, each individually, may
deem necessary or advisable or which may be required to enable the American
Performance Funds (the "Trust"), to comply with the Investment Company Act of
1940, as amended, and the Securities Act of 1933, as amended ("Acts"), and any
rules, regulations or requirements of the Securities and Exchange Commission in
respect thereof, in connection with the filing and effectiveness of any and all
amendments to the Trust's Registration Statement on Form N-1A pursuant to said
Acts, including specifically, but without limiting the generality of the
foregoing, the power and authority to sign in the name and on behalf of the
undersigned as a trustee and/or officer of the Trust any and all such amendments
filed with the Securities and Exchange Commission under said Acts, and any other
instruments or documents related thereto, and the undersigned does hereby ratify
and confirm all that said attorneys and agents, or either of them, shall do or
cause to be done by virtue thereof.

Dated:  July 25, 1997                            /S/ WALTER B. GRIMM
                                                 -------------------------------
                                                     Walter B. Grimm


<PAGE>   209


                                POWER OF ATTORNEY

         Jeffrey Shiverdecker, whose signature appears below, does hereby
constitute and appoint Martin E. Lybecker, Alan G. Priest, and Alyssa
Albertelli, each individually, his true and lawful attorneys and agents, with
power of substitution or resubstitution, to do any and all acts and things and
to execute any and all instruments which said attorneys and agents, each
individually, may deem necessary or advisable or which may be required to enable
the American Performance Funds (the "Trust"), to comply with the Investment
Company Act of 1940, as amended, and the Securities Act of 1933, as amended
("Acts"), and any rules, regulations or requirements of the Securities and
Exchange Commission in respect thereof, in connection with the filing and
effectiveness of any and all amendments to the Trust's Registration Statement on
Form N-1A pursuant to said Acts, including specifically, but without limiting
the generality of the foregoing, the power and authority to sign in the name and
on behalf of the undersigned as a trustee and/or officer of the Trust any and
all such amendments filed with the Securities and Exchange Commission under said
Acts, and any other instruments or documents related thereto, and the
undersigned does hereby ratify and confirm all that said attorneys and agents,
or either of them, shall do or cause to be done by virtue thereof.

Dated:  October 29, 1999                          /S/ JEFFREY SHIVERDECKER
                                                 -------------------------------
                                                      Jeffrey Shiverdecker








                                      -16-
<PAGE>   210


                                  EXHIBIT INDEX

EXHIBIT
  NO.          DESCRIPTION
-------        -----------

(i)            Opinion of Ropes & Gray.

(j)(1)         Consent of  KPMG LLP.

(j)(2)         Consent of Ropes & Gray.





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