AMERICAN CENTURY INVESTMENT TRUST
485BPOS, 1998-05-13
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                       SECURITIES AND EXCHANGE COMMISSION
                              Washington, DC 20549

                                    FORM N-1A

REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933                X
                                                                     -----

         File No. 33-65170:

         Pre-Effective Amendment No.____

         Post-Effective Amendment No._6_                               

                                     and/or

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

         File No. 811-7822:

         Amendment No._7_


         AMERICAN CENTURY INVESTMENT TRUST
         (Exact Name of Registrant as Specified in Charter)

         4500 Main Street, Kansas City, MO  64111
         (Address of Principal Executive Offices)

         Registrant's Telephone Number, including Area Code:  (816) 531-5575

         Douglas A. Paul
         Vice President, Secretary
         and General Counsel
         1665 Charleston Road, Mountain View, CA  94043
         (Name and Address of Agent for Service)

Approximate Date of Proposed Public Offering:  Immediately, upon effectiveness 
(first offered 11/17/93)

It is proposed that this filing become effective:

   _____  immediately upon filing pursuant to paragraph (b) of Rule 485
   __X__  on June 1, 1998 pursuant to paragraph (b) of Rule 485 
   _____  60 days after filing pursuant to paragraph (a) of Rule 485 
   _____  on (date) pursuant to paragraph (a)(1) of Rule 485 
   _____  75 days after filing pursuant to paragraph (a) (2) of Rule 485 
   _____  on (date) pursuant to paragraph (a)(2) of Rule 485

- --------------------------------------------------------------------------------
Registrant has elected to register an indefinite  number of shares of beneficial
interest  under the  Securities  Act of 1933  pursuant  to Rule 24f-2  under the
Investment  Company Act of 1940. On April 23, 1998, the Registrant  filed a Rule
24f-2  Notice on Form 24f-2 with  respect to its fiscal year ended  February 28,
1998.
<PAGE>
================================================================================
                              CROSS REFERENCE SHEET

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

         N-1A Item No.              Location
         -------------              --------
PART A

Item 1. Cover Page                  Cover Page
Item 2. Synopsis                    Transaction and Operating
                                    Expense Table
Item 3. Condensed Financial         Financial Highlights
          Information
Item 4. General Description         Investment Policies of
          Registrant                the Funds; Risk Factors;
                                    Other Investment
                                    Practices, Their Characteristics
                                    and Risks; Performance
                                    Advertising; Distribution
                                    of Fund Shares; Further
                                    Information About
                                    American Century
Item 5. Management of the           Management
        Fund
Item 6. Capital Stock and           Further Information About
        Other Securities            American Century, How to Redeem Shares,
                                    Cover Page, Distributions, Taxes
Item 7. Purchase of Securities      How to Open An Account;
        Being Offered               How to Exchange From One
                                    Account to Another;
                                    Share Price; Distributions;
Item 8. Redemption                  How to Redeem Shares;
                                    Signature Guarantee
Item 9. Pending Legal               N/A
        Proceedings


- --------------------------------------------------------------------------------
PART B
- --------------------------------------------------------------------------------

Item 10. Cover Page                 Cover Page
Item 11. Table of Contents          Table of Contents
Item 12. General Information        N/A
Item 13. Investment Objectives      Investment Policies and Techniques;
         and Policies               Investment Restrictions;
                                    Portfolio Transactions
Item 14. Management of the          Officers and Trustees
         Registrant
Item 15. Control Persons            Additional Purchase and Redemption
         and Principal              Information
         Holders of Securities
Item 16. Investment Advisory        Management;
         and Other Services         Custodians
Item 17. Brokerage Allocation       Brokerage;
                                    Performance Advertising
Item 18. Capital Stock and          Capital Stock;
         Other Securities           Multiple Class Structure
Item 19. Purchase, Redemption       N/A
         and Pricing of
         Securities Being
         Offered
Item 20. Tax Status                 N/A
Item 21. Underwriters               Additional Purchase and Redemption
                                    Information
Item 22. Calculation of Yield       Performance Advertising
         Quotations of Money
         Market Funds
Item 23. Financial Statements       Financial Statements
<PAGE>
                                   PROSPECTUS

                        [american century logo(reg. sm)]
                                    American
                                Century(reg.tm)

   
                                 JUNE 1, 1998
    

                                    BENHAM
                                 GROUP(reg.tm)

                              Prime Money Market

INVESTOR CLASS


                         AMERICAN CENTURY INVESTMENTS
                                FAMILY OF FUNDS

    American  Century  Investments  offers you nearly 70 fund  choices  covering
stocks, bonds, money markets,  specialty investments and blended portfolios.  To
help you find the funds that may meet your investment  needs,  American  Century
funds  have  been  divided  into  three  groups  based on  investment  style and
objectives. These groups, which appear below, are designed to help simplify your
fund decisions.

   
                       AMERICAN CENTURY INVESTMENTS
- -------------------------------------------------------------------------------
        Benham                American Century          Twentieth Century
        Group                      Group                      Group
- -------------------------------------------------------------------------------
   MONEY MARKET FUNDS         ASSET ALLOCATION &           GROWTH FUNDS
 GOVERNMENT BOND FUNDS          BALANCED FUNDS          INTERNATIONAL FUNDS
 DIVERSIFIED BOND FUNDS   CONSERVATIVE EQUITY FUNDS
  MUNICIPAL BOND FUNDS         SPECIALTY FUNDS
- -------------------------------------------------------------------------------
      Prime Money
         Market
    


                                  PROSPECTUS

   
                                 JUNE 1, 1998
    

                              Prime Money Market

                                INVESTOR CLASS

   
                       AMERICAN CENTURY INVESTMENT TRUST

    American Century Investment Trust is a part of American Century Investments,
a family of funds  that  includes  nearly 70  no-load  mutual  funds  covering a
variety of  investment  opportunities.  One of the money  market  funds from our
Benham Group is described in this Prospectus. Its investment objective is listed
on  page  2 of the  Prospectus.  The  other  funds  are  described  in  separate
prospectuses.

    Through its Investor Class of shares,  American  Century offers  investors a
full  line  of  no-load  funds,  investments  that  have  no  sales  charges  or
commissions.

    This Prospectus  gives you  information  about the fund that you should know
before investing. Please read this Prospectus carefully and retain it for future
reference.  Additional  information  is included in the  Statement of Additional
Information  dated June 1,  1998,  and filed with the  Securities  and  Exchange
Commission  (SEC).  It is  incorporated  into this  Prospectus by reference.  To
obtain a copy without charge, call or write:
    

                          AMERICAN CENTURY INVESTMENTS
                       4500 Main Street * P.O. Box 419200
                Kansas City, Missouri 64141-6200 * 1-800-345-2021
                        International calls: 816-531-5575
                     Telecommunications Device for the Deaf:
                   1-800-634-4113 * In Missouri: 816-444-3485
                             www.americancentury.com

    Additional  information,  including  this  Prospectus  and the  Statement of
Additional Information,  may be obtained by accessing the Web site maintained by
the SEC (www.sec.gov).

   
THESE  SECURITIES  HAVE NOT BEEN APPROVED OR  DISAPPROVED  BY THE SECURITIES AND
EXCHANGE COMMISSION OR ANY STATE SECURITIES  COMMISSION,  NOR HAS THE SECURITIES
AND  EXCHANGE  COMMISSION  OR ANY STATE  SECURITIES  COMMISSION  PASSED UPON THE
ACCURACY OR ADEQUACY OF THIS PROSPECTUS. ANY REPRESENTATION TO THE CONTRARY IS A
CRIMINAL OFFENSE.
    


PROSPECTUS                                                                1


                       INVESTMENT OBJECTIVE OF THE FUND

AMERICAN CENTURY-BENHAM
PRIME MONEY MARKET FUND

   
    The fund's  investment  objective  is to seek the  highest  level of current
income consistent with the preservation of capital.
    

    The fund buys high-quality, U.S. dollar-denominated money market instruments
and other short-term obligations of banks, governments and corporations.

    INVESTMENTS IN THE FUND ARE NOT INSURED NOR ARE THEY  GUARANTEED BY THE U.S.
GOVERNMENT OR ANY OTHER AGENCY. THERE IS NO ASSURANCE THAT THE FUND WILL BE ABLE
TO MAINTAIN A $1.00 SHARE PRICE.

  There is no assurance that the fund will achieve its investment objective.

NO  PERSON  IS  AUTHORIZED  BY THE  FUND TO GIVE  ANY  INFORMATION  OR MAKE  ANY
REPRESENTATION OTHER THAN THOSE CONTAINED IN THIS PROSPECTUS OR IN OTHER PRINTED
OR WRITTEN  MATERIAL ISSUED BY OR ON BEHALF OF THE FUND, AND YOU SHOULD NOT RELY
ON ANY OTHER INFORMATION OR REPRESENTATION.


2      INVESTMENT OBJECTIVE                   AMERICAN CENTURY INVESTMENTS


                               TABLE OF CONTENTS

Investment Objective of the Fund ..........................................    2
Transaction and Operating Expense Table ...................................    4
Financial Highlights ......................................................    5

INFORMATION REGARDING THE FUND

Investment Policies of the Fund ...........................................    6
    Eligible Investments ..................................................    6
    Portfolio Investment Quality and
      Maturity Criteria ...................................................    6
    Diversification .......................................................    7
    Industry Concentration ................................................    7
Risk Factors and Investment Techniques ....................................    7
    Corporate Obligations .................................................    7
    Bank Obligations ......................................................    7
    Government Obligations ................................................    8
    Variable and Floating-Rate Instruments ................................    8
    Rule 144A Securities ..................................................    8
    U.S. Dollar-Denominated Foreign Securities ............................    9
Other Investment Practices, Their Characteristics
  and Risks ...............................................................    9
    Repurchase Agreements .................................................    9
    When-Issued Securities ................................................    9
    Borrowing .............................................................    9
    Other Techniques ......................................................    9
Performance Advertising ...................................................    9

HOW TO INVEST WITH AMERICAN CENTURY INVESTMENTS

   
American Century Investments ..............................................   11
Investing in American Century .............................................   11
How to Open an Account ....................................................   11
          By Mail .........................................................   11
          By Wire .........................................................   11
          By Exchange .....................................................   12
          In Person .......................................................   12
    Subsequent Investments ................................................   12
          By Mail .........................................................   12
          By Telephone ....................................................   12
          By Online Access ................................................   12
          By Wire .........................................................   12
          In Person .......................................................   12
    Automatic Investment Plan .............................................   12
How to Exchange from One Account to Another ...............................   12
          By Mail .........................................................   13
          By Telephone ....................................................   13
          By Online Access ................................................   13
How to Redeem Shares ......................................................   13
          By Mail .........................................................   13
          By Telephone ....................................................   13
          By Check-A-Month ................................................   13
          Other Automatic Redemptions .....................................   13
    Redemption Proceeds ...................................................   13
          By Check ........................................................   13
          By Wire and ACH .................................................   13
    Redemption of Shares in Low-Balance Accounts ..........................   14
Signature Guarantee .......................................................   14
Special Shareholder Services ..............................................   14
          Automated Information Line ......................................   14
          Online Account Access ...........................................   14
          CheckWriting ....................................................   14
          Tax-Qualified Retirement Plans ..................................   15
Important Policies Regarding Your Investments .............................   15
Reports to Shareholders ...................................................   16
Employer-Sponsored Retirement Plans and
    Institutional Accounts ................................................   16
    

ADDITIONAL INFORMATION YOU SHOULD KNOW

   
Share Price ...............................................................   17
    When Share Price Is Determined ........................................   17
    How Share Price Is Determined .........................................   17
    Where to Find Yield Information .......................................   18
Distributions .............................................................   18
Taxes .....................................................................   18
    Tax-Deferred Accounts .................................................   18
    Taxable Accounts ......................................................   18
Management ................................................................   19
    Investment Management .................................................   19
    Code of Ethics ........................................................   20
    Transfer and Administrative Services ..................................   20
    Year 2000 Issues ......................................................   21
Distribution of Fund Shares ...............................................   21
Further Information About American Century ................................   21
    


PROSPECTUS                                        TABLE OF CONTENTS       3


                    TRANSACTION AND OPERATING EXPENSE TABLE

                                                                  Prime Money
                                                                     Market

SHAREHOLDER TRANSACTION EXPENSES:

Maximum Sales Load Imposed on Purchases ............................  none
Maximum Sales Load Imposed on Reinvested Dividends .................  none
Deferred Sales Load ................................................  none
Redemption Fee(1) ..................................................  none
Exchange Fee .......................................................  none

   
ANNUAL FUND OPERATING EXPENSES:
(as a percentage of average net assets)

Management Fees(2) ................................................. 0.60%
12b-1 Fees .........................................................  none
Other Expenses(3) .................................................. 0.00%
Total Fund Operating Expenses (net of expense limitation) .......... 0.60%
    

EXAMPLE:

You would pay the following expenses on a                   1 year     $ 6
$1,000 investment, assuming a 5% annual return and         3 years      19
redemption at the end of each time period:                 5 years      33
                                                          10 years      75

(1) Redemption proceeds sent by wire are subject to a $10 processing fee.

   
(2) A portion of the management  fee may be paid by the manager to  unaffiliated
    third parties who provide  recordkeeping  and  administrative  services that
    would   otherwise  be  performed  by  an  affiliate  of  the  manager.   See
    "Management-Transfer and Administrative Services," page 20.

(3) Other  Expenses,  which  includes  the fees and  expenses  (including  legal
    counsel fees) of those trustees who are not "interested  persons" as defined
    in the  Investment  Company Act of 1940 (the  Investment  Company Act),  are
    expected  to be less  than  0.01 of 1% of the  average  net  assets  for the
    current fiscal year.
    

    The purpose of this table is to help you  understand  the various  costs and
expenses  that you,  as a  shareholder,  will bear  directly  or  indirectly  in
connection with an investment in the class of shares of the fund offered by this
Prospectus.  The example set forth above assumes  reinvestment  of all dividends
and  distributions  and uses a 5%  annual  rate of  return  as  required  by SEC
regulations.

    NEITHER  THE 5% RATE OF  RETURN  NOR THE  EXPENSES  SHOWN  ABOVE  SHOULD  BE
CONSIDERED  INDICATIONS OF PAST OR FUTURE  RETURNS AND EXPENSES.  ACTUAL RETURNS
AND EXPENSES MAY BE GREATER OR LESS THAN THOSE SHOWN.

   
    The shares offered by this  Prospectus are Investor Class shares and have no
up-front or deferred sales charges,  commissions, or 12b-1 fees. The fund offers
one other class of shares,  primarily  to  institutional  investors,  that has a
different  fee  structure  than the Investor  Class.  The  difference in the fee
structures  among the classes is the result of their separate  arrangements  for
shareholder  and  distribution  services and not the result of any difference in
amounts  charged  by  the  manager  for  core  investment   advisory   services.
Accordingly,  the core  investment  advisory  expenses  do not vary by class.  A
difference in fees will result in different performance for the other class. For
additional information about the various classes, see "Further Information About
American Century," page 21.
    


4    TRANSACTION AND OPERATING EXPENSE TABLE    AMERICAN CENTURY INVESTMENTS


<TABLE>
<CAPTION>
   
                             FINANCIAL HIGHLIGHTS
                              PRIME MONEY MARKET

  The Financial  Highlights  for the fiscal year ended  February 28, 1998,  have
been audited by Coopers & Lybrand L.L.P., independent accountants,  whose report
thereon appears in the fund's annual report,  which is incorporated by reference
into the Statement of Additional  Information.  The Financial Highlights for the
periods  ended on or  before  February  28,  1997,  have been  audited  by other
independent  accountants.  The annual  report  contains  additional  performance
information  and will be made  available  upon request and without  charge.  The
information  presented  is for a share  outstanding  throughout  the years ended
February 28, except as noted.

                                        1998          1997          1996(1)         1995         1994(2)

PER-SHARE DATA

Net Asset Value,
<S>                                     <C>           <C>           <C>            <C>            <C>  
Beginning of Period .................   $1.00         $1.00         $1.00          $1.00          $1.00
                                      --------      --------      --------       --------       --------
Income From
Investment Operations

  Net Investment Income .............   0.05          0.05           0.06           0.05          0.01
                                      --------      --------      --------       --------       --------
Distributions

  From Net
  Investment Income .................  (0.05)        (0.05)         (0.06)        (0.05)         (0.01)
                                      --------      --------      --------       --------       --------
Net Asset Value, End of Period ......   $1.00         $1.00         $1.00          $1.00         $1.00
                                      ========      ========      ========       ========       ========
  TOTAL RETURN(3) ...................   5.29%         5.04%          5.60%         4.93%          0.96%

RATIOS/SUPPLEMENTAL DATA

Ratio of Operating Expenses
to Average Net Assets ...............   0.50%         0.50%          0.48%          0.04%           -

Ratio of Operating Expenses
to Average Net Assets
(Before Expense Waiver) .............   0.63%         0.63%          0.62%          0.71%       1.49%(4)

Ratio of Net Investment Income
to Average Net Assets ...............   5.17%         4.92%          5.43%          5.28%       3.35%(4)

Ratio of Net Investment Income
to Average Net Assets
(Before Expense Waiver) .............   5.04%         4.79%          5.29%          4.61%       1.86%(4)

Net Assets, End of Period
(in thousands) ......................$1,417,311    $1,211,990     $1,270,653     $1,509,863      $75,168

(1) Year Ended February 29, 1996.

(2) November 17, 1993 (inception) through February 28, 1994.

(3) Total return assumes  reinvestment  of dividends,  if any. Total returns for
    periods less than one year are not annualized.

(4) Annualized.
    
</TABLE>


PROSPECTUS                                 FINANCIAL HIGHLIGHTS      5


                        INFORMATION REGARDING THE FUND

INVESTMENT POLICIES OF THE FUND

    The fund has adopted certain  investment  restrictions that are set forth in
the  Statement of Additional  Information.  Those  restrictions,  as well as the
investment  objective of the fund identified on page 2 of this  Prospectus,  and
any other investment  policies designated as "fundamental" in this Prospectus or
in  the  Statement  of  Additional   Information,   cannot  be  changed  without
shareholder  approval.  The fund has implemented  additional investment policies
and  practices  to  guide  its  activities  in the  pursuit  of  its  investment
objective.  These policies and practices,  which are described  throughout  this
Prospectus,  are not  designated  as  fundamental  policies  and may be  changed
without shareholder approval.

   
    For an explanation of the  securities  ratings  referred to in the following
discussion,  see an explanation of fixed income securities  ratings under "Other
Information" in the Statement of Additional Information.
    

ELIGIBLE INVESTMENTS

    The fund  buys  high-quality  (first-tier),  U.S.  dollar-denominated  money
market instruments and other short-term obligations of banks,  governments,  and
corporations.  Some  of  the  fund's  possible  investments  are  listed  in the
following  table.  The  obligations  referenced  in  the  table  and  the  risks
associated  with  investing in them are  described  in the section  titled "Risk
Factors and Investment Techniques," which begins on page 7.

- --------------------------------------------------------------------------------
Issuers                                   Types of Obligations
- --------------------------------------------------------------------------------
Domestic and foreign financial            Negotiable certificates of
institutions (e.g., banks, broker-        deposit, bankers' acceptances,
dealers, insurance companies,             bank notes, and commercial
leasing and financing                     paper (including floating-rate
corporations)                             agency securities)
- --------------------------------------------------------------------------------
Domestic and foreign                      Commercial paper and short-
nonfinancial corporations                 term corporate debt obligations
                                          (including fixed- and
                                          variable-rate notes and
                                          bonds)
- --------------------------------------------------------------------------------

- --------------------------------------------------------------------------------
Issuers                                   Types of Obligations
- --------------------------------------------------------------------------------
U.S. government and its                   U.S. Treasury bills, notes,
agencies and instrumentalities            bonds, and U.S. government
                                          agency obligations (including
                                          floating-rate agency securities)
- --------------------------------------------------------------------------------
Foreign governments                       Commercial paper and
and their agencies and                    discount notes
instrumentalities
- --------------------------------------------------------------------------------

PORTFOLIO INVESTMENT QUALITY  AND MATURITY CRITERIA

    The manager  follows  regulatory  guidelines on quality and maturity for the
fund's  investments,  which are  designed to help  maintain a stable $1.00 share
price. In particular, the fund:

  (1)    Buys only U.S. dollar-denominated obligations with remaining maturities
         of 13 months or less (and variable- and floating-rate  obligations with
         demand features that effectively  shorten their maturities to 13 months
         or less);

  (2)    Maintains a dollar-weighted average portfolio maturity of 90 days or
         less;

   
  (3)    Restricts its investments to high-quality obligations determined by the
         manager  to  present  minimal  credit  risks,  pursuant  to  guidelines
         established by the Board of Trustees.
    

    To be considered high-quality, an obligation must be one of the following:

  (1)    A U.S. government obligation;

  (2)    Rated  (or  issued  by an  issuer  rated  with  respect  to a class  of
         short-term debt  obligations)  within the two highest rating categories
         for short-term debt  obligations by at least two nationally  recognized
         statistical rating organizations  (rating agencies) (or one if only one
         has rated the obligation);

  (3)    An unrated  obligation  judged by the manager,  pursuant to  guidelines
         established by the Board of Trustees, to be of comparable quality.

    The fund intends to buy only  obligations  that are designated as first-tier
securities as defined by the SEC; that is, securities with the highest rating.


6      INFORMATION REGARDING THE FUND         AMERICAN CENTURY INVESTMENTS


    The  acquisition of securities  that are unrated or rated by only one rating
agency must be approved or ratified by the Board of Trustees.

DIVERSIFICATION

    In order to reduce  investment  risks,  the  manager is  required  by law to
diversify the fund's  investment  portfolio.  As a general rule, the manager may
not invest more than 5% of the fund's  total  assets in  securities  issued by a
single  institution.  In addition,  the fund must also limit its  investments in
securities subject to puts of a single institution.

    This policy does not apply to U.S. government securities,  in which the fund
may invest without limitation. See the Statement of Additional Information for a
more detailed description.

INDUSTRY CONCENTRATION

    Under normal market  conditions,  25% or more of the fund's total assets are
invested in  obligations  of issuers in the financial  services  industry.  This
industry  concentration  reflects that of the markets in which the fund invests.
More than half of the  markets'  commercial  paper is  issued  by  companies  or
organizations in the financial services industry.

    For temporary defensive  purposes,  less than 25% of the fund's total assets
may be invested in  obligations of issuers in the financial  services  industry.
The  manager  will not invest  more than 25% of the fund's  total  assets in any
other industry.

RISK FACTORS AND INVESTMENT TECHNIQUES

    The fund may be  appropriate  for  investors  who seek to (1) earn income at
current money market rates while preserving their investments;  (2) use the fund
as part of a long-term, balanced investment portfolio consisting of money market
instruments,  bonds, and stocks;  or (3) use the fund to place investment monies
as part of a dollar-cost averaging investment program.

    Because the fund emphasizes  stability,  it will not generate as much income
as a bond fund. No single fund constitutes a balanced investment plan.

    Corporations  and  governments   address  their  short-term   borrowing  and
cash-flow management needs in a highly liquid, worldwide financial market called
the "money  market." The following is a brief  description of the types of money
market instruments the fund may buy.

CORPORATE OBLIGATIONS

    Commercial paper is issued by large  corporations to raise cash. The maximum
maturity for commercial  paper is 270 days,  although most  commercial  paper is
issued  with  maturities  of 60 days or less.  Commercial  paper is offered at a
discount with its full face value paid at maturity.

    Although  commercial  paper rates generally  fluctuate with the value of the
London Interbank Offered Rate (LIBOR), Treasury bills, bankers' acceptances, and
certificates  of deposit,  they are also influenced by (1) the issuer's size and
credit rating and (2) the commercial paper maturity date.

    Smaller or  lower-rated  corporations  may tap the  commercial  paper market
through asset-backed  commercial paper programs. In a typical program, a special
purpose  corporation  (a  SPC),  created  and/or  serviced  by a bank,  uses the
proceeds from an issuance of commercial  paper to purchase  receivables from one
or more corporations (sellers).  The sellers transfer their interest in the cash
flow from the  receivables to the SPC, and this cash is used to pay interest and
repay principal on the commercial  paper.  Letters of credit may be available to
cover the risk that the cash flow from the receivables will not be sufficient to
cover the maturing commercial paper.

    The fund may purchase corporate notes and bonds with remaining maturities of
13 months or less in the secondary market provided that each of these securities
has  characteristics  consistent with regulatory  requirements  for money market
funds.

BANK OBLIGATIONS

    Negotiable  certificates  of deposit (CDs)  evidence a bank's  obligation to
repay money  deposited  with it for a specified  period of time. The table below
identifies the types of CDs the fund may buy.

- --------------------------------------------------------------------------------
CD Type                                   Issuer
- --------------------------------------------------------------------------------
Domestic                                  Domestic offices of U.S. banks
- --------------------------------------------------------------------------------
Yankee                                    U.S. branches of foreign banks
- --------------------------------------------------------------------------------
Eurodollar                                Issued in London by U.S.,
                                          Canadian, European, and
                                          Japanese banks
- --------------------------------------------------------------------------------
Schedule B                                Canadian subsidiaries of
                                          non-Canadian banks
- --------------------------------------------------------------------------------


PROSPECTUS                           INFORMATION REGARDING THE FUND       7


    Bankers' acceptances are used to finance foreign commercial trade. Issued by
a bank with an importer's name on them, these  instruments allow the importer to
back up its own pledge to pay for  imported  goods with a bank's  obligation  to
cover the transaction if the importer fails to do so.

    Bank notes are senior unsecured promissory notes issued in the United States
by domestic commercial banks.

    The bank  obligations the fund may buy generally are not insured by the FDIC
or any other insurer.

GOVERNMENT OBLIGATIONS

    U.S.  Treasury  securities  differ from one another in their interest rates,
maturities,  and issuance and interest  payment  schedules.  Treasury bills have
initial  maturities of one year or less;  Treasury notes,  two to ten years; and
Treasury bonds, more than ten years.

    A number of U.S. government agencies and government-sponsored  organizations
issue debt  securities.  These  agencies  generally  are  created by Congress to
fulfill a specific  need,  such as providing  credit for home buyers or farmers.
Among these  agencies are the Federal  Home Loan Banks,  the Federal Farm Credit
System,  the Student Loan  Marketing  Association,  and the  Resolution  Funding
Corporation.

    Some  obligations  issued  or  guaranteed  by U.S.  government  agencies  or
instrumentalities  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
Treasury; others are supported by the U.S. government's  discretionary authority
to purchase certain obligations of the agency or instrumentality, and others are
supported only by the credit of the issuing agency or instrumentality.

    Supranational  organizations (generally,  multilateral lending institutions,
or MLIs) are  created by  governments  to promote  economic  reconstruction  and
development.  An MLI's  creditworthiness  is based not only on its own financial
performance, but on the willingness and ability of member governments to support
its lending activities.

    While maintaining  strict financial  controls to ensure liquidity and strong
creditworthiness,  MLIs finance their operations in the same manner as any other
financial  institution,   with  a  combination  of  short-  and  long-term  debt
obligations.  Short-term  debt is  usually  issued  in the  form  of  short-term
discount notes and commercial paper.

VARIABLE AND FLOATING-RATE INSTRUMENTS

    Variable-  and   floating-rate   instruments  are  issued  by  corporations,
financial institutions, and government agencies and instrumentalities.

    Floating-rate  instruments have interest rates that change whenever there is
a change in a designated base rate, whereas  variable-rate  instruments  provide
for specified periodic interest rate adjustments. The interest rate on variable-
and floating-rate  instruments is ordinarily determined by reference to (or is a
percentage of) an objective standard,  such as the Federal Funds effective rate,
the 90-day U.S. Treasury bill rate, or LIBOR.

    Although  the fund  typically  limits its  investments  to  securities  with
remaining  maturities  of 13 months or less,  it may  invest  in  variable-  and
floating-rate  instruments that have nominal (or stated) maturities in excess of
13 months,  provided that such  instruments (1) have demand features  consistent
with  regulatory  requirements  for money market  funds,  or (2) are  securities
issued by the U.S.  government  or a U.S.  government  agency that meet  certain
regulatory requirements for money market funds.

RULE 144A SECURITIES

    The fund may,  from time to time,  purchase Rule 144A  securities  when they
present  attractive  investment  opportunities  that  otherwise  meet the fund's
criteria for selection.  Rule 144A  securities are securities that are privately
placed with and traded among qualified  institutional  investors rather than the
general  public.  Although  Rule  144A  securities  are  considered  "restricted
securities," they are not necessarily illiquid.

   
    With respect to securities eligible for resale under Rule 144A, the staff of
the SEC has taken the  position  that the  liquidity of such  securities  in the
portfolio of a fund offering redeemable securities is a question of fact for the
Board  of  Trustees  to  determine,  such  determination  to  be  based  upon  a
consideration  of the readily  available  trading  markets and the review of any
contractual  restrictions.  The staff also  acknowledges  that,  while the Board
retains ultimate responsibility, it may delegate this function to the manager.
Accordingly, the Board has established guidelines and
    


8    INFORMATION REGARDING THE FUND            AMERICAN CENTURY INVESTMENTS


procedures  for  determining  the  liquidity  of Rule  144A  securities  and has
delegated  the  day-to-day  function of  determining  the liquidity of Rule 144A
securities to the manager.  The Board retains the  responsibility to monitor the
implementation of the guidelines and procedures it has adopted.

    Since the  secondary  market  for such  securities  is  limited  to  certain
qualified  institutional  investors,  the  liquidity of such  securities  may be
limited accordingly and a fund may, from time to time, hold a Rule 144A security
that is illiquid. In such an event, the fund's manager will consider appropriate
remedies to minimize  the effect on such  fund's  liquidity.  No fund may invest
more than 10% of its assets in illiquid  securities  (securities that may not be
sold within seven days at  approximately  the price used in determining  the net
asset value of fund shares).

U.S. DOLLAR-DENOMINATED FOREIGN SECURITIES

    The fund invests exclusively in U.S. dollar-denominated instruments, some of
which may be issued by foreign  entities  as  described  in the table on page 6.
Consequently,  the fund may be subject to risks different than those incurred by
a fund that invests only in debt obligations of domestic issuers.

   
    Currently,  the only  securities held outside the United States in which the
fund expects to invest are EuroCDs,  which are held in England. As a result, the
fund's exposure to these foreign  investment  risks is expected to be lower than
funds that invest more broadly in  securities  held  outside the United  States.
Regulatory limits specified in the section titled "Portfolio  Investment Quality
and Maturity  Criteria"  on page 6 apply  equally to  securities  of foreign and
domestic issuers.
    

OTHER INVESTMENT PRACTICES, THEIR CHARACTERISTICS
AND RISKS

   
    For additional information,  see "Investment  Restrictions" in the Statement
of Additional Information.
    

REPURCHASE AGREEMENTS

    The  fund may  enter  into  repurchase  agreements,  collateralized  by U.S.
government  securities,  with banks or broker-dealers that are deemed to present
minimum credit risk. A repurchase  agreement involves the purchase of a security
and a simultaneous agreement to sell the security back to the seller at a higher
price.  At the direction of the Board of Trustees,  the manager has  established
procedures  to minimize  potential  losses due to credit risk.  Delays or losses
could result if the other party to the agreement defaults or becomes bankrupt.

WHEN-ISSUED SECURITIES

   
    The fund may  sometimes  purchase new issues of  securities on a when-issued
basis or forward  commitment  basis when,  in the opinion of the  manager,  such
purchases  will  further  the  investment  objective  of the fund.  The price of
when-issued  securities is established at the time the commitment to purchase is
made. Delivery of and payment for these securities typically occur 15 to 45 days
after the commitment to purchase. Market rates of interest on debt securities at
the time of  delivery  may be higher or lower than those  contracted  for on the
when-issued security.  Accordingly, the value of such security may decline prior
to delivery,  which could  result in a loss to the fund. A separate  account for
each fund consisting of cash or appropriate  liquid assets in an amount at least
equal to the when-issued commitments will be established and maintained with the
custodian. No income will accrue to the fund prior to delivery.
    

BORROWING

    The  fund may  borrow  money  only  for  temporary  or  emergency  purposes.
Borrowings are not expected to exceed 5% of the fund's total assets.

OTHER TECHNIQUES

    The manager  may buy other types of  securities  or employ  other  portfolio
management   techniques  on  behalf  of  a  fund  including  reverse  repurchase
agreements.  When SEC  guidelines  require  it to do so, the fund will set aside
cash or  appropriate  liquid assets in a segregated  account to cover the fund's
obligations.

   
PERFORMANCE ADVERTISING

    From time to time, the fund may advertise performance data. Fund performance
may be shown  by  presenting  one or more  performance  measurements,  including
cumulative  total return or average  annual total  return,  yield and  effective
yield.  Performance data may be quoted separately for the Investor Class and for
the other class.
    


PROSPECTUS                           INFORMATION REGARDING THE FUND       9


    Cumulative  total  return data is computed by  considering  all  elements of
return,  including  reinvestment  of dividends and capital gains  distributions,
over a stated  period of time.  Average  annual  total return is  determined  by
computing  the annual  compound  return over a stated  period of time that would
have  produced  the fund's  cumulative  total return over the same period if the
fund's performance had remained constant throughout.

    A  quotation  of yield  reflects  the  fund's  income  over a stated  period
expressed as a percentage  of its share price.  Yield is calculated by measuring
the income  generated by an investment in the fund over a seven-day  period (net
of fund expenses). This income is then annualized, that is, the amount of income
generated by the investment over the seven-day period is assumed to be generated
over each  similar  period  each week  throughout  a full year and is shown as a
percentage of the  investment.  The  effective  yield is calculated in a similar
manner but, when  annualized,  the income earned by the investment is assumed to
be  reinvested.  The  effective  yield will be  slightly  higher  than the yield
because of the compounding effect on the assumed reinvestment.

    Yields are calculated  according to accounting methods that are standardized
in  accordance  with SEC  rules  for all stock  and bond  funds.  Because  yield
accounting methods differ from the methods used for other accounting purposes, a
fund's yield may not equal the income paid on its shares or the income  reported
in the fund's financial statements.

   
    The fund also may include in  advertisements  data comparing its performance
with the  performance  of  non-related  investment  media,  published  editorial
comments and performance rankings compiled by independent  organizations such as
Lipper  Analytical  Services or IBC's Money Fund  Report and  publications  that
monitor the performance of mutual funds.  Performance  information may be quoted
numerically  or may be presented  in a table,  graph or other  illustration.  In
addition,  fund  performance  may be  compared to  well-known  indices of market
performance  including  the IBC's  Money  Fund  Average  and Bank  Rate  Monitor
National  Index  of 2  (1)/(2)  year CD  rates.  Fund  performance  also  may be
compared,  on a relative basis, to other funds in our fund family. This relative
comparison, which may be based upon historical fund performance or historical or
expected volatility or other fund characteristics, may be presented numerically,
graphically or in text.  Fund  performance  also may be combined or blended with
other funds in our fund family, and that combined or blended  performance may be
compared to the same indices to which individual funds may be compared.
    

    All performance  information  advertised by the fund is historical in nature
and is not intended to represent or guarantee future results.  The value of fund
shares when redeemed may be more or less than their original cost.


10      INFORMATION REGARDING THE FUND         AMERICAN CENTURY INVESTMENTS


                HOW TO INVEST WITH AMERICAN CENTURY INVESTMENTS

AMERICAN CENTURY INVESTMENTS

    The  fund  offered  by this  prospectus  is a part of the  American  Century
Investments  family  of  mutual  funds.  Our  family  provides  a full  range of
investment  opportunities,  from  the  aggressive  equity  growth  funds  in our
Twentieth  Century Group,  to the fixed income funds in our Benham Group, to the
moderate risk and specialty  funds in our American  Century  Group.  Please call
1-800-345-2021  for a  brochure  or  prospectuses  for the  other  funds  in the
American Century Investments family.

   
    To reduce  expenses and  demonstrate  respect for our  environment,  we have
initiated a project  through which we will  eliminate  duplicate  copies of most
financial  reports and  prospectuses  to most  households  and  deliver  account
statements to most households in a single envelope,  even if they have more than
one  account.  If you would like  additional  copies of  financial  reports  and
prospectuses or separate mailing of account statements, please call us.
    

INVESTING IN AMERICAN CENTURY

    The  following  sections  explain how to invest in American  Century  funds,
including purchases, redemptions,  exchanges and special services. You will find
more detail about doing  business with us by referring to the Investor  Services
Guide that you will receive when you open an account.

    If  you  own  or  are   considering   purchasing   fund  shares  through  an
employer-sponsored  retirement  plan or through a bank,  broker-dealer  or other
financial  intermediary,  the  following  sections,  as well as the  information
contained  in our Investor  Services  Guide,  may not apply to you.  Please read
"Employer-Sponsored Retirement Plans and Institutional Accounts," page 16.

HOW TO OPEN AN ACCOUNT

    To open an account,  you must complete and sign an  application,  furnishing
your  taxpayer  identification  number.  (You must also certify  whether you are
subject to  withholding  for failing to report  income to the IRS.)  Investments
received without a certified taxpayer identification number will be returned.

    The minimum investment is $2,500 [$1,000 for IRA accounts].

    The  minimum  investment  requirements  may be  different  for some types of
retirement  accounts.  Call one of our  Investor  Services  Representatives  for
information  on  our  retirement  plans,  which  are  available  for  individual
investors or for those investing through their employers.

    Please note:  If you register  your account as belonging to multiple  owners
(e.g., as joint  tenants),  you must provide us with specific  authorization  on
your  application  in order for us to accept  written or telephone  instructions
from  a  single  owner.  Otherwise,  all  owners  will  have  to  agree  to  any
transactions  that involve the account  (whether the  transaction  request is in
writing or over the telephone).

    You may invest in the following ways:

BY MAIL

    Send a  completed  application  and  check or money  order  payable  in U.S.
dollars to American Century Investments.

BY WIRE

    You may make your initial  investment by wiring funds.  To do so, call us or
mail  a  completed   application  and  provide  your  bank  with  the  following
information:

*  RECEIVING BANK AND ROUTING NUMBER:
   Commerce Bank, N.A. (101000019)

*  BENEFICIARY (BNF):
   American Century Services Corporation
   4500 Main St., Kansas City, Missouri 64111

*  BENEFICIARY ACCOUNT NUMBER (BNF ACCT):
   2804918

*  REFERENCE FOR BENEFICIARY (RFB):
   American  Century  account number into which you are investing.  If more than
   one, leave blank and see Bank to Bank Information below.


PROSPECTUS          HOW TO INVEST WITH AMERICAN CENTURY INVESTMENTS       11


*  ORIGINATOR TO BENEFICIARY (OBI):
   Name and address of owner of account into which you are investing.

*  BANK TO BANK INFORMATION
   (BBI OR FREE FORM TEXT):

    *    Taxpayer identification or Social Security
         number.

    *    If more than one account,  account numbers and amount to be invested in
         each account.

   
    *    Current tax year, previous tax year or rollover  designation if an IRA.
         Specify  whether  traditional  IRA, Roth IRA,  Education IRA,  SEP-IRA,
         SARSEP-IRA, SIMPLE Employer or SIMPLE Employee.
    

BY EXCHANGE

    Call 1-800-345-2021 from 7 a.m. to 7 p.m. Central time to get information on
opening an account by exchanging from another American Century account. See this
page for more information on exchanges.

IN PERSON

    If you prefer to work with a representative  in person,  please visit one of
our Investor Centers, located at:

    4500 Main Street
    Kansas City, Missouri 64111

    4917 Town Center Drive
    Leawood, Kansas 66211

    1665 Charleston Road
    Mountain View, California 94043

    2000 S. Colorado Blvd.
    Denver, Colorado 80222

SUBSEQUENT INVESTMENTS

   
    Subsequent  investments  may  be  made  by an  automatic  bank,  payroll  or
government direct deposit (see "Automatic Investment Plan," this page) or by any
of  the  methods  below.  The  minimum  investment  requirement  for  subsequent
investments is $250 for checks submitted  without the investment slip portion of
a previous  statement or confirmation  and $50 for all other types of subsequent
investments.
    

BY MAIL

    When making subsequent  investments,  enclose your check with the investment
slip portion of a previous statement or confirmation.  If the investment slip is
not available, indicate your name, address and account number on your check or a
separate  piece of paper.  (Please  be aware  that the  investment  minimum  for
subsequent investments is higher without an investment slip.)

BY TELEPHONE

    Once your account is open, you may make investments by telephone if you have
authorized us (by choosing "Full Services" on your  application) to draw on your
bank  account.  You may  call an  Investor  Services  Representative  or use our
Automated Information Line.

BY ONLINE ACCESS

    Once  your  account  is open,  you may make  investments  online if you have
authorized us (by choosing "Full Services" on your  application) to draw on your
bank account.

BY WIRE

    You may make  subsequent  investments  by  wire.  Follow  the wire  transfer
instructions on page 11 and indicate your account number.

IN PERSON

    You  may  make  subsequent  investments  in  person  at one of our  Investor
Centers. The locations of our Investor Centers are listed on this page.

AUTOMATIC INVESTMENT PLAN

    You may  elect on your  application  to make  investments  automatically  by
authorizing us to draw on your bank account regularly.  Such investments must be
at least the  equivalent  of $50 per  month.  You also may  choose an  automatic
payroll or government  direct  deposit.  If you are  establishing a new account,
check the appropriate box under  "Automatic  Investments" on your application to
receive  more  information.  If you  would  like to add a direct  deposit  to an
existing account, please call an Investor Services Representative.

HOW TO EXCHANGE FROM ONE ACCOUNT TO ANOTHER

    As long as you meet any minimum  investment  requirements,  you may exchange
your fund  shares to our other  funds up to six times per year per  account.  An
exchange request will be processed as of the same


12 HOW TO INVEST WITH AMERICAN CENTURY INVESTMENTS  AMERICAN CENTURY INVESTMENTS


day it is  received,  if it is received  before the fund's net asset  values are
calculated,  which is one hour prior to the close of the New York Stock Exchange
for funds issued by American Century Target Maturities Trust and at the close of
the Exchange for all of our other funds.  See "When Share Price Is  Determined,"
page 17.

    For any single exchange,  the shares of each fund being acquired must have a
value of at least $100.  However, we will allow investors to set up an Automatic
Exchange Plan between any two funds in the amount of at least $50 per month. See
our Investor Services Guide for further information about exchanges.

BY MAIL

    You may direct us in writing  to  exchange  your  shares  from one  American
Century account to another. For additional information,  please see our Investor
Services Guide.

BY TELEPHONE

    You can make exchanges over the telephone  (either with an Investor Services
Representative or using our Automated Information Line--see page 14) if you have
authorized  us to  accept  telephone  instructions.  You can  authorize  this by
selecting "Full Services" on your application or by calling us at 1-800-345-2021
to get the appropriate form.

BY ONLINE ACCESS

    You  can  make  exchanges  online  if  you  have  authorized  us  to  accept
instructions  over the  Internet.  You can  authorize  this by  selecting  "Full
Services"  on your  application  or by calling us at  1-800-345-2021  to get the
appropriate form.

HOW TO REDEEM SHARES

    We will  redeem or "buy back" your shares at any time.  Redemptions  will be
made at the next net asset value determined after a complete  redemption request
is received.

    Please note that a request to redeem shares in an IRA or 403(b) plan must be
accompanied  by an  executed  IRS  Form  W4-P  and a reason  for  withdrawal  as
specified by the IRS.

BY MAIL

    Your  written  instructions  to  redeem  shares  may  be  made  either  by a
redemption  form,  which we will  send you upon  request,  or by a letter to us.
Certain  redemptions  may require a signature  guarantee.  Please see "Signature
Guarantee," page 14.

BY TELEPHONE

    If you have authorized us to accept telephone  instructions,  you may redeem
your shares by calling an Investor Services Representative.

BY CHECK-A-MONTH

   
    You may redeem shares by Check-A-Month.  A Check-A-Month  plan automatically
redeems  enough  shares  each month to provide you with a check in an amount you
choose  (minimum $50). To set up a Check-A-Month  plan,  please call and request
our Check-A-Month brochure.
    

OTHER AUTOMATIC REDEMPTIONS

   
    You may elect to make  redemptions  automatically  by authorizing us to send
funds to you or to your account at a bank or other financial institution. To set
up automatic redemptions, call an Investor Services Representative.
    

REDEMPTION PROCEEDS

    Please  note that  shortly  after a  purchase  of shares is made by check or
electronic  draft (also known as an ACH draft) from your bank, we may wait up to
15 days or longer to send  redemption  proceeds (to allow your purchase funds to
clear).  No interest is paid on the redemption  proceeds after the redemption is
processed but before your redemption proceeds are sent.

    Redemption proceeds may be sent to you in one of the following ways:

BY CHECK

    Ordinarily,  all  redemption  checks will be made payable to the  registered
owner of the shares and will be mailed only to the  address of record.  For more
information, please refer to our Investor Services Guide.

BY WIRE AND ACH

    You may authorize us to transmit  redemption  proceeds by wire or ACH. These
services will be effective 15 days after we receive the authorization.


PROSPECTUS          HOW TO INVEST WITH AMERICAN CENTURY INVESTMENTS       13


    Your bank will usually receive wired funds within 48 hours of  transmission.
Funds  transferred  by ACH may be received up to seven days after  transmission.
Wired  funds  are  subject  to a $10 fee to cover  bank wire  charges,  which is
deducted from redemption proceeds.  Once the funds are transmitted,  the time of
receipt and the funds' availability are not under our control.

REDEMPTION OF SHARES IN LOW-BALANCE ACCOUNTS

   
    Whenever  the  shares  held in an  account  have a value  of less  than  the
required  minimum,  a letter will be sent advising you to bring the value of the
shares held in the account up to the  minimum.  If action is not taken within 90
days of the letter's  date,  the shares held in the account will be redeemed and
the  proceeds  from the  redemption  will be sent by check  to your  address  of
record. We reserve the right to increase the investment minimums.
    

SIGNATURE GUARANTEE

    To protect  your  accounts  from fraud,  some  transactions  will  require a
signature guarantee.  Which transactions will require a signature guarantee will
depend on which  service  options  you elect  when you open  your  account.  For
example,  if you choose "In  Writing  Only," a signature  guarantee  is required
when:

    *    redeeming more than $25,000; or

    *    establishing or increasing a Check-A-Month or automatic transfer on an
         existing account.

    You can obtain a signature  guarantee from a bank or trust  company,  credit
union,  broker-dealer,  securities  exchange or association,  clearing agency or
savings association, as defined by federal law.

    For a more in-depth explanation of our signature guarantee policy, or if you
live outside the United  States and would like to know how to obtain a signature
guarantee, please consult our Investor Services Guide.

    We reserve the right to require a signature guarantee on any transaction, or
to change this policy at any time.

SPECIAL SHAREHOLDER SERVICES

    We offer  several  service  options to make your  account  easier to manage.
These are listed on the account  application.  Please make note of these options
and  elect  the ones  that are  appropriate  for you.  Be aware  that the  "Full
Services" option offers you the most flexibility. You will find more information
about each of these service options in our Investor Services Guide.

    Our special shareholder services include:

AUTOMATED INFORMATION LINE

    We offer an Automated  Information  Line, 24 hours a day, seven days a week,
at 1-800-345-8765.  By calling the Automated Information Line, you may listen to
fund prices,  yields and total return  figures.  You may also use the  Automated
Information  Line to make  investments  into your accounts (if we have your bank
information  on file) and  obtain  your  share  balance,  value and most  recent
transactions.  If you have authorized us to accept telephone  instructions,  you
also may exchange shares from one fund to another via the Automated  Information
Line.  Redemption  instructions  cannot be given via the  Automated  Information
Line.

ONLINE ACCOUNT ACCESS

    You  may   contact   us  24   hours   a  day,   seven   days  a   week,   at
www.americancentury.com  to access daily share prices,  receive updates on major
market indices and view historical  performance of the fund. If you select "Full
Services" on your application,  you can use your personal access code and Social
Security  number  to view  your  account  balance  and  account  activity,  make
subsequent  investments  from your bank account or exchange shares from one fund
to another.

CHECKWRITING

    We offer  CheckWriting  as a service  option for your account.  CheckWriting
allows you to redeem shares in your account by writing a draft  (check)  against
your account  balance.  (Shares held in certificate  form may not be redeemed by
check.)  There is no limit on the number of checks  you can write,  but each one
must be for at least $100.

    When you write a check, you will continue to receive dividends on all shares
until your check is presented  for payment to our clearing  bank.  If you redeem
all shares in your account by check,  any accrued  distributions on the redeemed
shares will be paid to you in cash on the next monthly distribution date.


14 HOW TO INVEST WITH AMERICAN CENTURY INVESTMENTS  AMERICAN CENTURY INVESTMENTS


    If  you  want  to  add  CheckWriting  to an  existing  account  that  offers
CheckWriting, contact us by telephone or mail for an appropriate form. For a new
account, you may elect CheckWriting on your purchase application by choosing the
"Full Services" option. CheckWriting is not available for any account held in an
IRA or 403(b) plan.

    CheckWriting  redemptions  may  only  be  made  on  checks  provided  by us.
Currently, there is no charge for checks or for the CheckWriting service.

    We  will  return  checks  drawn  on  insufficient  funds  or on  funds  from
investments  made by means  other  than by wire  within  the  previous  15 days.
Neither  the  company  nor our  clearing  bank  will be  liable  for any loss or
expenses  associated  with returned  checks.  Your account may be assessed a $15
service charge for checks drawn on insufficient funds.

    A stop payment may be ordered on a check written  against your  account.  We
will use reasonable  efforts to stop a payment,  but we cannot guarantee that we
will be able to do so. If we are successful in fulfilling a stop-payment  order,
your account may be assessed a $15 fee.

TAX-QUALIFIED RETIREMENT PLANS

    Each fund is available for your tax-deferred  retirement plan. Call or write
us and request the appropriate forms for:

    *    Individual Retirement Accounts (IRAs);

    *    403(b) plans for employees of public school
         systems and non-profit organizations; or

    *    Profit sharing plans and pension plans for
         corporations and other employers.

    If your IRA and  403(b)  accounts  do not total  $10,000,  each  account  is
subject to an annual $10 fee, up to a total of $30 per year.

   
    You also can transfer your  tax-deferred  plan to us from another company or
custodian. Call or write us for a Request to Transfer form.
    

IMPORTANT POLICIES REGARDING YOUR INVESTMENTS

    Every  account is subject to policies  that could  affect  your  investment.
Please refer to the Investor  Services Guide for further  information  about the
policies discussed below, as well as further detail about the services we offer.

  (1)    We reserve the right for any reason to suspend  the  offering of shares
         for a  period  of  time,  or to  reject  any  specific  purchase  order
         (including  purchases  by  exchange).  Additionally,  purchases  may be
         refused  if, in the  opinion  of the  manager,  they are of a size that
         would disrupt the management of the fund.

  (2)    We  reserve  the  right  to  make  changes  to  any  stated  investment
         requirements,  including those that relate to purchases,  transfers and
         redemptions.  In addition,  we also may alter,  add to or terminate any
         investor   services  and   privileges.   Any  changes  may  affect  all
         shareholders or only certain series or classes of shareholders.

  (3)    Shares  being  acquired  must be  qualified  for sale in your  state of
         residence.

  (4)    Transactions  requesting  a  specific  price and date,  other than open
         orders, will be refused.  Once you have mailed or otherwise transmitted
         your  transaction  instructions  to us,  they  may not be  modified  or
         canceled.

  (5)    If a transaction request is made by a corporation,  partnership, trust,
         fiduciary,  agent  or  unincorporated   association,  we  will  require
         evidence  satisfactory to us of the authority of the individual  making
         the request.

  (6)    We have established  procedures  designed to assure the authenticity of
         instructions received by telephone. These procedures include requesting
         personal  identification  from callers,  recording telephone calls, and
         providing  written  confirmations  of  telephone  transactions.   These
         procedures are designed to protect  shareholders  from  unauthorized or
         fraudulent  instructions.  If we do not employ reasonable procedures to
         confirm  the  genuineness  of  instructions,  then we may be liable for
         losses due to unauthorized or fraudulent instructions. The company, its
         transfer agent and manager will not be responsible  for any loss due to
         instructions they reasonably believe are genuine.

  (7)    All   signatures   should  be  exactly  as  the  name  appears  in  the
         registration.  If the owner's name appears in the  registration as Mary
         Elizabeth Jones, she should sign that way and not as Mary E. Jones.


PROSPECTUS          HOW TO INVEST WITH AMERICAN CENTURY INVESTMENTS       15


  (8)    Unusual  stock  market  conditions  have  in the  past  resulted  in an
         increase  in  the  number  of  shareholder   telephone  calls.  If  you
         experience  difficulty in reaching us during such periods, you may send
         your transaction instructions by mail, express mail or courier service,
         or you may  visit  one of our  Investor  Centers.  You also may use our
         Automated Information Line if you have requested and received an access
         code and are not attempting to redeem shares.

  (9)    If  you  fail  to  provide  us  with  the  correct  certified  taxpayer
         identification  number, we may reduce any redemption proceeds by $50 to
         cover the  penalty the IRS will impose on us for failure to report your
         correct taxpayer identification number on information reports.

  (10)   We will perform special inquiries on shareholder  accounts.  A research
         fee of $15 per hour may be applied.

REPORTS TO SHAREHOLDERS

    At the  end of  each  calendar  quarter,  we will  send  you a  consolidated
statement that summarizes all of your American Century  holdings,  as well as an
individual  statement  for  each  fund you own that  reflects  all  year-to-date
activity in your account.  You may request a statement of your account  activity
at any time.

    With the  exception of most  automatic  transactions,  each time you invest,
redeem,  transfer or exchange  shares,  we will send you a  confirmation  of the
transaction. See the Investor Services Guide for more detail.

    Carefully  review  all the  information  relating  to  transactions  on your
statements  and  confirmations  to ensure that your  instructions  were acted on
properly.  Please notify us immediately in writing if there is an error.  If you
fail to provide  notification  of an error  with  reasonable  promptness,  i.e.,
within 30 days of  non-automatic  transactions  or within 30 days of the date of
your consolidated quarterly statement, in the case of automatic transactions, we
will deem you to have ratified the transaction.

    No later than January 31 of each year, we will send you reports that you may
use in completing your U.S. income tax return.  See the Investor  Services Guide
for more information.

    Each year,  we will send you an annual and a semiannual  report  relating to
your fund, each of which is incorporated herein by reference.  The annual report
includes audited financial  statements and a list of portfolio  securities as of
the  fiscal  year  end.  The  semiannual  report  includes  unaudited  financial
statements  for the first six  months of the fiscal  year,  as well as a list of
portfolio  securities at the end of the period. You also will receive an updated
prospectus at least once each year.  Please read these materials  carefully,  as
they will help you understand your fund.

EMPLOYER-SPONSORED RETIREMENT PLANS AND
INSTITUTIONAL ACCOUNTS

    Information   contained  in  our  Investor   Services   Guide   pertains  to
shareholders  who invest  directly with American  Century rather than through an
employer-sponsored retirement plan or through a financial intermediary.

    If  you  own  or  are   considering   purchasing   fund  shares  through  an
employer-sponsored  retirement  plan,  your  ability to  purchase  shares of the
funds, exchange them for shares of other American Century funds, and redeem them
will depend on the terms of your plan.

    If you  own or are  considering  purchasing  fund  shares  through  a  bank,
broker-dealer,  insurance company or other financial intermediary,  your ability
to purchase,  exchange and redeem shares will depend on your agreement with, and
the policies of, such financial intermediary.

    You may reach one of our Institutional  Service  Representatives  by calling
1-800-345-3533 to request information about our funds and services,  to obtain a
current  prospectus or to get answers to any questions  about our funds that you
are unable to obtain through your plan administrator or financial intermediary.


16 HOW TO INVEST WITH AMERICAN CENTURY INVESTMENTS  AMERICAN CENTURY INVESTMENTS


                    ADDITIONAL INFORMATION YOU SHOULD KNOW

SHARE PRICE

WHEN SHARE PRICE IS DETERMINED

    The price of your shares is also  referred to as their net asset value.  Net
asset value is determined  by  calculating  the total value of a fund's  assets,
deducting  total  liabilities  and  dividing  the result by the number of shares
outstanding.  For all American  Century  funds,  except funds issued by American
Century Target  Maturities  Trust, net asset value is determined as of the close
of regular trading on each day that the New York Stock Exchange is open, usually
3 p.m.  Central  time.  The net asset  values  for Target  Maturities  funds are
determined one hour prior to the close of the Exchange.

    Investments and requests to redeem or exchange shares will receive the share
price next  determined  after  receipt by us of the  investment,  redemption  or
exchange  request.  For example,  investments and requests to redeem or exchange
shares  received by us or one of our agents or  designees  before the time as of
which the net asset value of the fund is determined,  are effective on, and will
receive the price  determined,  that day.  Investment,  redemption  and exchange
requests received  thereafter are effective on, and receive the price determined
as of, the close of the Exchange on the next day the Exchange is open.

    Investments  are  considered  received  only when payment is received by us.
Wired funds are  considered  received on the day they are  deposited in our bank
account if they are deposited before the time as of which the net asset value of
the fund is determined.

    Investments by telephone pursuant to your prior  authorization to us to draw
on your bank account are considered received at the time of your telephone call.

    Investment and transaction  instructions  received by us on any business day
by mail  prior  to the  time as of  which  the net  asset  value  of the fund is
determined, will receive that day's price. Investments and instructions received
after that time will receive the price determined on the next business day.

   
    If you invest in fund shares through an  employer-sponsored  retirement plan
or  other  financial  intermediary,  it  is  the  responsibility  of  your  plan
recordkeeper or financial  intermediary to transmit your purchase,  exchange and
redemption requests to the fund's transfer agent prior to the applicable cut-off
time for receiving  orders and to make payment for any purchase  transactions in
accordance with the fund's  procedures or any contractual  arrangements with the
fund or the fund's distributor in order for you to receive that day's price.

    We have contractual  relationships with certain financial  intermediaries in
which such intermediaries  represent that they have systems to track the time at
which  investment  orders are  received  and to  segregate  orders  received  at
different times.  Based on these  representations,  the fund has authorized such
intermediaries  and their designees to accept purchase and redemption  orders on
the fund's behalf up to the applicable  cut-off time. The fund will be deemed to
have received such orders upon acceptance by the duly  authorized  intermediary,
and such  orders  will be priced at the fund's net asset  value next  determined
after acceptance on the fund's behalf by such intermediary.
    

HOW SHARE PRICE IS DETERMINED

    The valuation of assets for determining net asset value may be summarized as
follows:

    The portfolio  securities of the fund, except as otherwise noted,  listed or
traded on a domestic  securities  exchange  are valued at the last sale price on
that  exchange.  Portfolio  securities  primarily  traded on foreign  securities
exchanges  generally  are  valued  at  the  preceding  closing  values  of  such
securities on the exchange where primarily traded. If no sale is reported, or if
local convention or regulation so provides, the mean of the latest bid and asked
prices is used.  Depending on local convention or regulation,  securities traded
over-the-counter  are priced at the mean of the latest bid and asked prices,  or
at the last sale  price.  When  market  quotations  are not  readily  available,
securities and other assets are valued at fair


PROSPECTUS                    ADDITIONAL INFORMATION YOU SHOULD KNOW     17


value as  determined  in  accordance  with  procedures  adopted  by the Board of
Trustees.

    Debt  securities  not traded on a principal  securities  exchange are valued
through  valuations  obtained from a commercial  pricing  service or at the most
recent  mean of the bid and asked  prices  provided  by  investment  dealers  in
accordance with procedures established by the Board of Trustees.

    Pursuant to a  determination  by the fund's  Board of Trustees and Rule 2a-7
under the Investment Company Act of 1940,  portfolio  securities of the fund are
valued at amortized  cost.  When a security is valued at amortized  cost,  it is
valued at its cost  when  purchased,  and  thereafter  by  assuming  a  constant
amortization to maturity of any discount or premium, regardless of the impact of
fluctuating interest rates on the market value of the instrument.

WHERE TO FIND YIELD INFORMATION

    The yield of the Investor  Class of the fund is published  weekly in leading
financial publications and daily in many local newspapers. Yield information may
also  be   obtained   by   calling   us  or  by   accessing   our  Web  site  at
www.americancentury.com.

DISTRIBUTIONS

    At the  close  of each  day,  including  Saturdays,  Sundays  and  holidays,
dividends are declared and credited (i.e.,  available for redemption)  daily and
distributed monthly on the last Friday of each month.

    You will  begin to  participate  in the  distributions  the day  AFTER  your
purchase is effective.  See "When Share Price Is  Determined" on page 17. If you
redeem  shares,  you will receive the  distribution  declared for the day of the
redemption.  If all  shares  are  redeemed  (other  than by  CheckWriting),  the
distribution  on the  redeemed  shares  will be  included  with your  redemption
proceeds.

    The fund  does not  expect to  realize  any  long-term  capital  gains  and,
accordingly, does not expect to make any capital gains distributions.

   
    Participants in employer-sponsored retirement or savings plans must reinvest
all  distributions.   For  shareholders   investing  through  taxable  accounts,
distributions  will be  reinvested  unless  you elect to  receive  them in cash.
Distributions of less than $10 generally will be reinvested.  Distributions made
shortly  after a  purchase  by check  or ACH may be held up to 15 days.  You may
elect to have distributions on shares held in certain IRAs and 403(b) plans paid
in cash only if you are at least 59 (1)/(2) years old or permanently and totally
disabled.  Distribution  checks  normally are mailed within seven days after the
record date. Please consult our Investor Services Guide for further  information
regarding your distribution options.
    

TAXES

    Each fund has elected to be taxed under Subchapter M of the Internal Revenue
Code,  which means that to the extent its income is distributed to shareholders,
it pays no income tax.

TAX-DEFERRED ACCOUNTS

    If fund  shares  are  purchased  through  tax-deferred  accounts,  such as a
qualified  employer-sponsored  retirement  or savings  plan,  income and capital
gains  distributions  paid by the fund will  generally not be subject to current
taxation,  but will  accumulate in your account under the plan on a tax-deferred
basis.

    Employer-sponsored  retirement and savings plans are governed by complex tax
rules.  If you elect to participate in your employer's  plan,  consult your plan
administrator,  your plan's  summary plan  description,  or a  professional  tax
advisor   regarding  the  tax   consequences  of   participation  in  the  plan,
contributions to, and withdrawals or distributions from the plan.

TAXABLE ACCOUNTS

   
    If fund shares are purchased through taxable accounts,  distributions of net
investment  income  and net  short-term  capital  gains  are  taxable  to you as
ordinary  income,  except as described  below. The dividends from net income may
qualify for the 70% dividends  received deduction for corporations to the extent
that the  fund  held  shares  receiving  the  dividend  for  more  than 45 days.
Distributions  from gains on assets  held longer than 12 months but no more than
18 months  (28% rate gain)  and/or  assets  held longer than 18 months (20% rate
gain) are taxable as long-term  gains  regardless of the length of time you have
held the shares.  However,  you should note that any loss realized upon the sale
or  redemption  of  shares  held for six  months or less  will be  treated  as a
long-term capital loss to the extent of any distribution
    


18   ADDITIONAL INFORMATION YOU SHOULD KNOW    AMERICAN CENTURY INVESTMENTS


   
of  long-term  capital  gain (28% or 20% rate gain) to you with  respect to such
shares.

    Distributions  are taxable to you  regardless  of whether  they are taken in
cash or reinvested,  even if the value of your shares is below your cost. If you
purchase shares shortly before a distribution,  you must pay income taxes on the
distribution,  even though the value of your investment (plus cash received,  if
any) will not have  increased.  In  addition,  the  share  price at the time you
purchase  shares may  include  unrealized  gains in the  securities  held in the
investment portfolio of the fund. If these portfolio securities are subsequently
sold and the gains are realized,  they will, to the extent not offset by capital
losses, be paid to you as a distribution of capital gains and will be taxable to
you as short-term or long-term capital gains (28% and/or 20% rate gain).

    In January of the year  following the  distribution,  if you own shares in a
taxable account, you will receive a Form 1099-DIV notifying you of the status of
your distributions for federal income tax purposes.

    Distributions also may be subject to state and local taxes, even if all or a
substantial  part  of such  distributions  are  derived  from  interest  on U.S.
government  obligations  which,  if you received them directly,  would be exempt
from state income tax. However, most but not all states allow this tax exemption
to pass  through  to fund  shareholders  when a fund pays  distributions  to its
shareholders.  You should  consult your tax advisor about the tax status of such
distributions in your own state.

    If you have not complied  with certain  provisions  of the Internal  Revenue
Code and  Regulations,  we are  required by federal law to withhold and remit to
the IRS 31% of reportable  payments (which may include dividends,  capital gains
distributions  and redemptions).  Those regulations  require you to certify that
the Social Security number or tax  identification  number you provide is correct
and that you are not subject to 31% withholding for previous  under-reporting to
the  IRS.  You  will be asked  to make  the  appropriate  certification  on your
application.  Payments  reported by us that omit your Social  Security number or
tax  identification  number will  subject us to a penalty of $50,  which will be
charged  against  your account if you fail to provide the  certification  by the
time the report is filed. This charge is not refundable.

    In addition to the federal income tax consequences  described above relating
to an  investment  in a fund,  there  may be other  federal,  state or local tax
considerations  that depend upon the circumstances of each particular  investor.
Prospective  shareholders are therefore urged to consult their tax advisors with
respect to the effect of this investment on their own specific situations.
    

MANAGEMENT

INVESTMENT MANAGEMENT

   
    The fund is the sole series of the American  Century  Investment  Trust (the
Trust).  Under  the laws of the  Commonwealth  of  Massachusetts,  the  Board of
Trustees is  responsible  for  managing  the  business and affairs of the Trust.
Acting  pursuant to an  investment  management  agreement  entered into with the
fund,  American Century  Investment  Management,  Inc., serves as the investment
manager of the fund. Its principal place of business is American  Century Tower,
4500 Main Street,  Kansas City,  Missouri 64111.  The manager has been providing
investment advisory services to investment  companies and institutional  clients
since it was founded in 1958.
    

    The manager supervises and manages the investment  portfolio of the fund and
directs the purchase and sale of its investment  securities.  It utilizes a team
of portfolio managers, assistant portfolio managers and analysts acting together
to manage the assets of the fund. The team meets  regularly to review  portfolio
holdings and to discuss purchase and sale activity. The team adjusts holdings in
the fund's portfolio as it deems appropriate in pursuit of the fund's investment
objective.  Individual  portfolio  manager  members of the team may also  adjust
portfolio holdings of the fund as necessary between team meetings.

   
    The portfolio  manager  members of the team  managing the fund  described in
this  Prospectus  and  their  work  experience  for the last  five  years are as
follows:

    DENISE TABACCO, Portfolio Manager, joined American Century in 1988, becoming
a member of its  portfolio  department  in 1991. In 1995 she assumed her current
position as a Portfolio Manager.

    JOHN F. WALSH,  Portfolio Manager,  joined American Century in February 1996
as an Investment Analyst, a position he held until May 1997. At that time he was
    


PROSPECTUS                   ADDITIONAL INFORMATION YOU SHOULD KNOW     19


   
promoted to Portfolio  Manager.  Prior to joining  American  Century,  Mr. Walsh
served as an Assistant Vice President and Analyst at First  Interstate Bank, Los
Angeles,  California, from July 1993 to January 1996. Prior to that he served as
an Analyst at The Long-Term Credit Bank of Japan, Los Angeles, California.
    

   
    The  activities  of the manager are subject only to directions of the fund's
Board of  Trustees.  The  manager  pays  all the  expenses  of the  fund  except
brokerage,  taxes,  interest,  fees and  expenses of the  non-interested  person
trustees (including counsel fees) and extraordinary expenses.

    For the services  provided to the fund,  the manager  receives a monthly fee
based on a percentage of the average net assets of the fund.  The annual rate at
which this fee is assessed is determined monthly in a two-step process: First, a
fee rate  schedule  is  applied  to the  assets  of all of the funds in a fund's
investment  category which are managed by the manager (the  Investment  Category
Fee). The three  investment  categories are: Money Market Funds,  Bond Funds and
Equity Funds.  Second,  a separate fee rate schedule is applied to the assets of
all of the funds  managed by the  manager  (the  Complex  Fee).  The  Investment
Category  Fee and the  Complex  Fee are then  added  to  determine  the  unified
management  fee payable by the fund to the manager.  Currently,  the  Investment
Category  Fee for the fund is an annual  rate of 0.30% of the average net assets
of the fund. The Complex Fee is currently an annual rate of 0.30% of the average
net assets of the fund. Further  information about the calculation of the annual
management fee is contained in the Statement of Additional Information.

    On the first  business day of each month,  the fund pays a management fee to
the  manager  for the  previous  month at the  specified  rate.  The fee for the
previous month is calculated by  multiplying  the applicable fee for the fund by
the  aggregate  average  daily closing value of the fund's net assets during the
previous  month,  and  further  multiplying  that  product  by a  fraction,  the
numerator  of  which  is the  number  of  days  in the  previous  month  and the
denominator of which is 365 (366 in leap years).
    

CODE OF ETHICS

    The fund and the  manager  have  adopted  a Code of  Ethics  that  restricts
personal  investing  practices by  employees of the manager and its  affiliates.
Among other  provisions,  the Code of Ethics requires that employees with access
to information about the purchase or sale of securities in the fund's portfolios
obtain  preclearance before executing personal trades. With respect to Portfolio
Managers  and  other  investment   personnel,   the  Code  of  Ethics  prohibits
acquisition  of securities  in an initial  public  offering,  as well as profits
derived from the purchase and sale of the same security within 60 calendar days.
These provisions are designed to ensure that the interests of fund  shareholders
come before the interests of the people who manage those funds.

TRANSFER AND ADMINISTRATIVE SERVICES

    American Century  Services  Corporation,  American Century Tower,  4500 Main
Street,  Kansas City, Missouri 64111, acts as transfer agent and dividend-paying
agent for the fund. It provides facilities, equipment and personnel to the fund,
and is paid for such services by the manager.

   
    Although there is no sales charge levied by the fund, transactions in shares
of the fund may be  executed  by brokers  or  investment  advisors  who charge a
transaction-based  fee or other fee for their  services.  Such  charges may vary
among  broker-dealers and financial advisors,  but in all cases will be retained
by the  broker-dealer  or financial  advisor and not remitted to the fund or the
manager.  You  should be aware of the fact that these  transactions  may be made
directly with American Century without incurring such fees.
    

    From time to time,  special  services  may be  offered to  shareholders  who
maintain  higher  share  balances  in our family of funds.  These  services  may
include the waiver of minimum investment requirements, expedited confirmation of
shareholder  transactions,  newsletters and a team of personal  representatives.
Any expenses  associated with these special services will be paid by the manager
or its affiliates.

    The manager and the transfer agent are both wholly owned by American Century
Companies, Inc. (ACC). James E. Stowers Jr., Chairman of the Board of


20   ADDITIONAL INFORMATION YOU SHOULD KNOW    AMERICAN CENTURY INVESTMENTS


Directors of ACC,  controls ACC by virtue of his  ownership of a majority of its
common stock.

   
    Pursuant  to  a  Sub-Administration   Agreement  with  the  manager,   Funds
Distributor  Inc.  (FDI) serves as the  Co-Administrator  for the funds.  FDI is
responsible for (i) providing  certain  officers of the funds and (ii) reviewing
and filing  marketing and sales  literature on behalf of the funds. The fees and
expenses of FDI are paid by the manager.

YEAR 2000 ISSUES
    

   
    Many of the world's computer systems currently cannot properly  recognize or
process  date-sensitive  information  relating to the Year 2000 and beyond.  The
fund and the  manager  depend  upon the  computer  systems  of  various  service
providers,  including  the  transfer  agent,  for their  day-to-day  operations.
Inadequate  remediation of the Year 2000 problem by these service  providers and
others  with whom they  interact  could  have an  adverse  effect on the  fund's
operations,  including  pricing,  securities  trading  and  settlement,  and the
provision of shareholder services.

    The transfer agent, in cooperation with the manager, has assembled a team of
information  technology  professionals who are taking steps to address Year 2000
issues with respect to its own computers and to obtain  satisfactory  assurances
that  comparable  steps are being  taken by the fund's and the  manager's  other
major service  providers  and vendors.  The key phases of the  remediation  plan
include: an inventory of all internal systems,  vendor products and services and
data providers  (substantially  completed in 1997); an assessment of all systems
for date reliance and the impact of the century rollover on each  (substantially
completed  with respect to critical  systems in early 1998);  and the renovation
and  testing of  affected  systems  (targeted  for  completion  with  respect to
critical  systems by the end of 1998).  The manager will pay for the remediation
effort with revenues from its management fee, so that the fund will not directly
bear any of the cost.

    In light of these  remediation  efforts,  the  fund  does not  anticipate  a
material  adverse  impact on its  business,  operations  or financial  condition
relating  to Year  2000  issues.  However,  there can be no  assurance  that the
remediation  plan will be sufficient and timely or that  interaction  with other
noncomplying  computer  systems will not have a material  adverse  effect on the
fund's business, operations or financial condition.
    

   
    In addition, companies in which the fund invests may have Year 2000 computer
problems.  The value of their  securities could go down if they do not fix their
problems  in  time  or if  fixing  them  is very  expensive.  Before  making  an
investment  decision  about a company,  the manager  asks it about its Year 2000
readiness.  However, the manager cannot be sure that the information it receives
is complete and accurate,  and there is no guarantee that  portfolio  companies'
Year 2000 problems will not hurt the fund's performance.
    

DISTRIBUTION OF FUND SHARES

   
    The fund's shares are distributed by FDI, a registered broker-dealer. FDI is
a wholly-owned  indirect  subsidiary of Boston  Institutional  Group, Inc. FDI's
principal business address is 60 State Street, Suite 1300, Boston, Massachusetts
02109.  The Investor Class of shares does not pay any commissions or sales loads
to the distributor or to any other broker-dealers or financial intermediaries in
connection with the distribution of fund shares.

    Investors  may  open  accounts  with  American   Century  only  through  the
distributor.  All purchase  transactions  in the fund offered by this Prospectus
are  processed  by the  transfer  agent,  which  is  authorized  to  accept  any
instructions relating to fund accounts.  All purchase orders must be accepted by
the  distributor.  All fees and expenses of FDI in acting as distributor for the
fund are paid by the manager.
    

FURTHER INFORMATION ABOUT AMERICAN CENTURY

    The Trust is an open-end  management  investment  company.  Its business and
affairs  are  managed  by its  officers  under  the  direction  of its  Board of
Trustees.

    The  principal  office  of the fund is  American  Century  Tower,  4500 Main
Street, P.O. Box 419200, Kansas City, Missouri 64141-6200.  All inquiries may be
made by mail to that address,  or by telephone to 1-800-345-2021  (international
calls: 816-531-5575).

    The fund is the sole series of the Trust,  which  issues  shares with no par
value. Additional series of the Trust may be created in the future. In the event
that such other  series are  created,  the assets  belonging  to each  series of
shares will be held separately


PROSPECTUS                    ADDITIONAL INFORMATION YOU SHOULD KNOW    21


by the custodian and in effect each series will be a separate fund.

   
    American  Century offers two classes of the fund offered by this Prospectus:
an Investor  Class and an Advisor Class.  The shares offered by this  Prospectus
are Investor Class shares and have no up-front  charges,  commissions,  or 12b-1
fees.

    The other class of shares is primarily offered to institutional investors or
through  institutional   distribution   channels,   such  as  employer-sponsored
retirement plans or through banks, broker-dealers,  insurance companies or other
financial  intermediaries.  The other class has different fees, expenses, and/or
minimum  investment  requirements than the Investor Class. The difference in the
fee structures  among the classes is the result of their  separate  arrangements
for shareholder and  distribution  services and not the result of any difference
in  amounts  charged  by the  manager  for core  investment  advisory  services.
Accordingly,  the  core  investment  advisory  expenses  do not  vary by  class.
Different fees and expenses will affect performance.  For additional information
concerning the other classes of shares not offered by this  Prospectus,  call us
at  1-800-345-3533 or contact a sales  representative or financial  intermediary
who offers those classes of shares.

    Except as described  below,  all classes of shares of a fund have  identical
voting,  dividend,   liquidation  and  other  rights,  preferences,   terms  and
conditions.  The only  differences  among the various classes are (a) each class
may be subject to different  expenses specific to that class, (b) each class has
a different identifying designation or name, (c) each class has exclusive voting
rights with respect to matters  solely  affecting  such class and (d) each class
may have different exchange privileges.

    Each  share,  irrespective  of series or class,  is entitled to one vote for
each dollar of net asset value applicable to such share on all questions, except
for those  matters  that must be voted on  separately  by the series or class of
shares affected.  Matters affecting only one series or class are voted upon only
by that series or class.
    

    Shares have  non-cumulative  voting rights,  which means that the holders of
more than 50% of the votes cast in an election of trustees  can elect all of the
trustees if they choose to do so, and in such event the holders of the remaining
votes will not be able to elect any person or persons to the Board of Trustees.

    Unless required by the Investment  Company Act, it will not be necessary for
the Trust to hold annual meetings of shareholders. As a result, shareholders may
not vote each year on the election of trustees or the  appointment  of auditors.
However,  pursuant to the Trust's by-laws, the holders of shares representing at
least  10% of the  votes  entitled  to be cast may  request  the Trust to hold a
special meeting of shareholders.  We will assist in the communication with other
shareholders.

   
    WE RESERVE THE RIGHT TO CHANGE ANY OF OUR POLICIES, PRACTICES AND PROCEDURES
DESCRIBED IN THIS PROSPECTUS, INCLUDING THE STATEMENT OF ADDITIONAL INFORMATION,
WITHOUT  SHAREHOLDER  APPROVAL  EXCEPT  IN  THOSE  INSTANCES  WHERE  SHAREHOLDER
APPROVAL IS EXPRESSLY REQUIRED.


22   ADDITIONAL INFORMATION YOU SHOULD KNOW    AMERICAN CENTURY INVESTMENTS
    


                                     NOTES


PROSPECTUS                                                    NOTES       23


                                     NOTES


24                                                                      NOTES


                                     NOTES


PROSPECTUS                                                    NOTES       25


P.O. BOX 419200
KANSAS CITY, MISSOURI
64141-6200

INVESTOR SERVICES:
1-800-345-2021 OR 816-531-5575

AUTOMATED INFORMATION LINE:
1-800-345-8765

TELECOMMUNICATIONS DEVICE FOR THE DEAF:
1-800-634-4113 OR 816-444-3485

FAX: 816-340-7962

www.americancentury.com

                        [american century logo(reg. sm)]
                                    American
                                Century(reg.tm)

   
9806           [recycled logo]
SH-BKT-12370      Recycled
    
<PAGE>
                                   PROSPECTUS

                        [american century logo(reg. sm)]
                                    American
                                Century(reg.tm)


                                 JUNE 1, 1998

                                    BENHAM
                                 GROUP(reg.tm)

                              Prime Money Market

ADVISOR CLASS


                         AMERICAN CENTURY INVESTMENTS
                                FAMILY OF FUNDS

    American  Century  Investments  offers you nearly 70 fund  choices  covering
stocks, bonds, money markets,  specialty investments and blended portfolios.  To
help you find the funds that may meet your investment  needs,  American  Century
funds  have  been  divided  into  three  groups  based on  investment  style and
objectives. These groups, which appear below, are designed to help simplify your
fund decisions.

                      AMERICAN CENTURY INVESTMENTS
- -------------------------------------------------------------------------------
        Benham                American Century          Twentieth Century
        Group                      Group                      Group
- -------------------------------------------------------------------------------
   MONEY MARKET FUNDS         ASSET ALLOCATION &           GROWTH FUNDS
 GOVERNMENT BOND FUNDS          BALANCED FUNDS          INTERNATIONAL FUNDS
 DIVERSIFIED BOND FUNDS   CONSERVATIVE EQUITY FUNDS
  MUNICIPAL BOND FUNDS         SPECIALTY FUNDS
- -------------------------------------------------------------------------------
      Prime Money
         Market


                                  PROSPECTUS

                                 JUNE 1, 1998

                              Prime Money Market

                                 ADVISOR CLASS

   
                       AMERICAN CENTURY INVESTMENT TRUST

    American Century Investment Trust is a part of American Century Investments,
a family of funds that  includes  nearly 70 no-load and  low-load  mutual  funds
covering a variety of  investment  opportunities.  One of the money market funds
from our Benham Group is described in this Prospectus.  Its investment objective
is  listed  on page 2 of this  Prospectus.  The other  funds  are  described  in
separate prospectuses.
    

    The fund's shares offered in this  Prospectus (the Advisor Class shares) are
sold at their net asset value with no sales charges or commissions.  The Advisor
Class shares are subject to Rule 12b-1  shareholder  services  and  distribution
fees as described in this Prospectus.

    The Advisor  Class  shares are  intended  for  purchase by  participants  in
employer-sponsored retirement or savings plans and for persons purchasing shares
through   broker-dealers,   banks,   insurance  companies  and  other  financial
intermediaries that provide various administrative and distribution services.

                          AMERICAN CENTURY INVESTMENTS
                       4500 Main Street * P.O. Box 419385
               Kansas City, Missouri 64141-6385 * 1-800-345-3533
                       International calls: 816-531-5575
                    Telecommunications Device for the Deaf:
                  1-800-345-1833 * In Missouri: 816-444-3038
                            www.americancentury.com

    Additional  information,  including  this  Prospectus  and the  Statement of
Additional Information,  may be obtained by accessing the Web site maintained by
the SEC (www.sec.gov).

THESE  SECURITIES  HAVE NOT BEEN APPROVED OR  DISAPPROVED  BY THE SECURITIES AND
EXCHANGE COMMISSION OR ANY STATE SECURITIES  COMMISSION,  NOR HAS THE SECURITIES
AND  EXCHANGE  COMMISSION  OR ANY STATE  SECURITIES  COMMISSION  PASSED UPON THE
ACCURACY OR ADEQUACY OF THIS PROSPECTUS. ANY REPRESENTATION TO THE CONTRARY IS A
CRIMINAL OFFENSE.


PROSPECTUS                                                                  1


                       INVESTMENT OBJECTIVE OF THE FUND

AMERICAN CENTURY-BENHAM
PRIME MONEY MARKET FUND

   
    The fund's  investment  objective  is to seek the  highest  level of current
income consistent with the preservation of capital.
    

    The fund buys high-quality, U.S. dollar-denominated money market instruments
and other short-term obligations of banks, governments and corporations.

    INVESTMENTS IN THE FUND ARE NOT INSURED NOR ARE THEY GUARANTEED BY THE U.S.
GOVERNMENT OR ANY OTHER AGENCY. THERE IS NO ASSURANCE THAT THE FUND WILL BE ABLE
TO MAINTAIN A $1.00 SHARE PRICE.

  There is no assurance that the fund will achieve its investment objective.

NO  PERSON  IS  AUTHORIZED  BY THE  FUND TO GIVE  ANY  INFORMATION  OR MAKE  ANY
REPRESENTATION OTHER THAN THOSE CONTAINED IN THIS PROSPECTUS OR IN OTHER PRINTED
OR WRITTEN  MATERIAL ISSUED BY OR ON BEHALF OF THE FUND, AND YOU SHOULD NOT RELY
ON ANY OTHER INFORMATION OR REPRESENTATION.


2      INVESTMENT OBJECTIVE                   AMERICAN CENTURY INVESTMENTS


                               TABLE OF CONTENTS

   
Investment Objective of the Fund ..........................................    2
Transaction and Operating Expense Table ...................................    4
Performance Information of Other Class ....................................    5
    

INFORMATION REGARDING THE FUND

Investment Policies of the Fund ...........................................    6
    Eligible Investments ..................................................    6
    Portfolio Investment Quality and
      Maturity Criteria ...................................................    6
    Diversification .......................................................    7
    Industry Concentration ................................................    7
Risk Factors and Investment Techniques ....................................    7
    Corporate Obligations .................................................    7
    Bank Obligations ......................................................    7
    Government Obligations ................................................    8
    Variable and Floating-Rate Instruments ................................    8
    Rule 144A Securities ..................................................    8
    U.S. Dollar-Denominated Foreign Securities ............................    9
Other Investment Practices, Their Characteristics
  and Risks ...............................................................    9
    Repurchase Agreements .................................................    9
    When-Issued Securities ................................................    9
    Borrowing .............................................................    9
    Other Techniques ......................................................    9
Performance Advertising ...................................................    9

HOW TO INVEST WITH AMERICAN CENTURY INVESTMENTS

   
American Century Investments ..............................................   11
How to Purchase and Sell
  American Century Funds ..................................................   11
How to Exchange from one American
  Century Fund to Another .................................................   11
How to Redeem Shares ......................................................   11
Telephone Services ........................................................   11
    Investors Line ........................................................   11
    

ADDITIONAL INFORMATION YOU SHOULD KNOW

   
Share Price ...............................................................   12
    When Share Price Is Determined ........................................   12
    How Share Price Is Determined .........................................   12
    Where to Find Yield Information .......................................   13
Distributions .............................................................   13
Taxes .....................................................................   13
    Tax-Deferred Accounts .................................................   13
    Taxable Accounts ......................................................   13
Management ................................................................   14
    Investment Management .................................................   14
    Code of Ethics ........................................................   15
    Transfer and Administrative Services ..................................   15
    Year 2000 Issues ......................................................   16
Distribution of Fund Shares ...............................................   16
    Service and Distribution Fees .........................................   16
Further Information About American Century ................................   17
    


PROSPECTUS                                        TABLE OF CONTENTS       3


                    TRANSACTION AND OPERATING EXPENSE TABLE

                                                                 Prime Money
                                                                    Market

SHAREHOLDER TRANSACTION EXPENSES:

Maximum Sales Load Imposed on Purchases .........................    none
Maximum Sales Load Imposed on Reinvested Dividends ..............    none
Deferred Sales Load .............................................    none
Redemption Fee ..................................................    none
Exchange Fee ....................................................    none

   
ANNUAL FUND OPERATING EXPENSES:
(as a percentage of average net assets)

Management Fees(1) ..............................................   0.35%
12b-1 Fees(2) ...................................................   0.50%
Other Expenses(3) ...............................................   0.00%
Total Fund Operating Expenses (net of expense limitation) .......   0.85%
    

EXAMPLE:

   
You would pay the following expenses on a                 1 year     $  9
$1,000 investment, assuming a 5% annual return and       3 years       27
redemption at the end of each time period:               5 years       47
                                                        10 years      105

(1) A portion of the management  fee may be paid by the manager to  unaffiliated
    third parties who provide  recordkeeping  and  administrative  services that
    would   otherwise  be  performed  by  an  affiliate  of  the  manager.   See
    "Management-Transfer and Administrative Services," page 15.

(2) The 12b-1 fee is designed to permit  investors  to  purchase  Advisor  Class
    shares  through   broker-dealers,   banks,  insurance  companies  and  other
    financial  intermediaries.  A portion of the fee is used to compensate  them
    for ongoing  recordkeeping and administrative  services that would otherwise
    be  performed  by an  affiliate  of the  manager,  and a portion  is used to
    compensate  them  for  distribution  and  other  shareholder  services.  See
    "Service and Distribution Fees," page 16.

(3) Other  Expenses,  which  includes  the fees and  expenses  (including  legal
    counsel fees) of those trustees who are not "interested  persons" as defined
    in the  Investment  Company Act of 1940 (the  Investment  Company Act),  are
    expected  to be less  than  0.01 of 1% of the  average  net  assets  for the
    current fiscal year.
    

    The purpose of this table is to help you  understand  the various  costs and
expenses  that you,  as a  shareholder,  will bear  directly  or  indirectly  in
connection with an investment in the class of shares of the fund offered by this
Prospectus.  The example set forth above assumes  reinvestment  of all dividends
and  distributions  and uses a 5%  annual  rate of  return  as  required  by SEC
regulations.

    NEITHER  THE 5% RATE OF  RETURN  NOR THE  EXPENSES  SHOWN  ABOVE  SHOULD  BE
CONSIDERED  INDICATIONS OF PAST OR FUTURE  RETURNS AND EXPENSES.  ACTUAL RETURNS
AND EXPENSES MAY BE GREATER OR LESS THAN THOSE SHOWN.

   
    The shares offered by this  Prospectus  are Advisor Class shares.  The funds
offer one other class of shares,  which is  primarily  made  available to retail
investors.  This other  class has a  different  fee  structure  than the Advisor
Class.  The difference in the fee structures  among the classes is the result of
their separate  arrangements for shareholder and  distribution  services and not
the  result  of any  difference  in  amounts  charged  by the  manager  for core
investment advisory services. Accordingly, the core investment advisory expenses
do not vary by class. A difference in fees will result in different  performance
for the other class. For additional  information about the various classes,  see
"Further Information About American Century," page 17.
    


4    TRANSACTION AND OPERATING EXPENSE TABLE   AMERICAN CENTURY INVESTMENTS


<TABLE>
<CAPTION>
   
                    PERFORMANCE INFORMATION OF OTHER CLASS
                              PRIME MONEY MARKET

  The  Advisor  Class of the fund was  established  June 1, 1998;  therefore  no
shares had been issued prior to the fund's prior fiscal year end. The  financial
information  in this  table  regarding  selected  per  share  data  for the fund
reflects the  performance of the fund's  Investor  Class of shares,  which has a
total expense ratio that is 0.25% lower than the Advisor Class.  Had the Advisor
Class been in existence for the fund for the time periods presented,  the fund's
performance information would be lower as a result of the higher expense.

  The  performance  information  for the year ended  February 28, 1998, has been
audited by Coopers & Lybrand,  L.L.P.,  independent  accountants,  whose  report
thereon appears in the fund's annual report,  which is incorporated by reference
into the Statement of Additional  Information.  The performance  information for
the periods  ended on or before  February  28,  1997,  has been audited by other
independent  accountants.  The annual  report  contains  additional  performance
information  and will be made  available  upon request and without  charge.  The
information  presented  is for a share  outstanding  throughout  the years ended
February 28, except as noted.

                                       1998          1997         1996(1)       1995         1994(2)

PER-SHARE DATA

Net Asset Value,
<S>                                    <C>           <C>          <C>           <C>           <C>  
Beginning of Period ...............    $1.00         $1.00        $1.00         $1.00         $1.00
                                     --------      --------     --------      --------      --------
Income From
Investment Operations

  Net Investment Income ...........    0.05          0.05         0.06          0.05          0.01
                                     --------      --------     --------      --------      --------
Distributions

  From Net
  Investment Income ...............   (0.05)        (0.05)       (0.06)        (0.05)        (0.01)
                                     --------      --------     --------      --------      --------
Net Asset Value,
End of Period .....................    $1.00         $1.00        $1.00         $1.00         $1.00
                                     ========      ========     ========      ========      ========
  TOTAL RETURN(3) .................    5.29%         5.04%        5.60%        4.93%          0.96%

RATIOS/SUPPLEMENTAL DATA

Ratio of Operating Expenses
to Average Net Assets .............    0.50%         0.50%         0.48%         0.04%           -

Ratio of Operating Expenses
to Average Net Assets
(Before Expense Waiver) ...........    0.63%         0.63%         0.62%         0.71%       1.49%(4)

Ratio of Net Investment Income
to Average Net Assets .............    5.17%         4.92%         5.43%         5.28%       3.35%(4)

Ratio of Net Investment Income
to Average Net Assets
(Before Expense Waiver) ...........    5.04%         4.79%         5.29%         4.61%       1.86%(4)

Net Assets, End of Period
(in thousands) .................... $1,417,311    $1,211,990    $1,270,653    $1,509,863      $75,168

(1) Year Ended February 29, 1996.

(2) November 17, 1993 (inception) through February 28, 1994.

(3) Total return assumes  reinvestment  of dividends,  if any. Total returns for
    periods less than one year are not annualized.

(4) Annualized.
    
</TABLE>


PROSPECTUS                       PERFORMANCE INFORMATION OF OTHER CLASS     5


                        INFORMATION REGARDING THE FUND

INVESTMENT POLICIES OF THE FUND

    The fund has adopted certain  investment  restrictions that are set forth in
the  Statement of Additional  Information.  Those  restrictions,  as well as the
investment  objective of the fund identified on page 2 of this  Prospectus,  and
any other investment  policies designated as "fundamental" in this Prospectus or
in  the  Statement  of  Additional   Information,   cannot  be  changed  without
shareholder  approval.  The fund has implemented  additional investment policies
and  practices  to  guide  its  activities  in the  pursuit  of  its  investment
objective.  These policies and practices,  which are described  throughout  this
Prospectus,  are not  designated  as  fundamental  policies  and may be  changed
without shareholder approval.

   
    For an explanation of the  securities  ratings  referred to in the following
discussion,  see an explanation of fixed income securities  ratings under "Other
Information" in the Statement of Additional Information.
    

ELIGIBLE INVESTMENTS

    The fund  buys  high-quality  (first-tier),  U.S.  dollar-denominated  money
market instruments and other short-term obligations of banks,  governments,  and
corporations.  Some  of  the  fund's  possible  investments  are  listed  in the
following  table.  The  obligations  referenced  in  the  table  and  the  risks
associated  with  investing in them are  described  in the section  titled "Risk
Factors and Investment Techniques," which begins on page 7.

- --------------------------------------------------------------------------------
Issuers                                   Types of Obligations
- --------------------------------------------------------------------------------
Domestic and foreign financial            Negotiable certificates of
institutions (e.g., banks, broker-        deposit, bankers' acceptances,
dealers, insurance companies,             bank notes, and commercial
leasing and financing                     paper (including floating-rate
corporations)                             agency securities)
- --------------------------------------------------------------------------------
Domestic and foreign                      Commercial paper and short-
nonfinancial corporations                 term corporate debt obligations
                                          (including fixed- and
                                          variable-rate notes and
                                          bonds)
- --------------------------------------------------------------------------------

- --------------------------------------------------------------------------------
Issuers                                   Types of Obligations
- --------------------------------------------------------------------------------
U.S. government and its                   U.S. Treasury bills, notes,
agencies and instrumentalities            bonds, and U.S. government
                                          agency obligations (including
                                          floating-rate agency securities)
- --------------------------------------------------------------------------------
Foreign governments                       Commercial paper and
and their agencies and                    discount notes
instrumentalities
- --------------------------------------------------------------------------------

PORTFOLIO INVESTMENT QUALITY AND  MATURITY CRITERIA

    The manager  follows  regulatory  guidelines on quality and maturity for the
fund's  investments,  which are  designed to help  maintain a stable $1.00 share
price. In particular, the fund:

  (1)    Buys only U.S. dollar-denominated obligations with remaining maturities
         of 13 months or less (and variable- and floating-rate  obligations with
         demand features that effectively  shorten their maturities to 13 months
         or less);

  (2)    Maintains a dollar-weighted average portfolio maturity of 90 days or
         less;

  (3)    Restricts its investments to high-quality obligations determined by the
         manager  to  present  minimal  credit  risks,  pursuant  to  guidelines
         established by the Board of Trustees.

    To be considered high-quality, an obligation must be one of the following:

  (1)    A U.S. government obligation;

  (2)    Rated  (or  issued  by an  issuer  rated  with  respect  to a class  of
         short-term debt  obligations)  within the two highest rating categories
         for short-term debt  obligations by at least two nationally  recognized
         statistical rating organizations  (rating agencies) (or one if only one
         has rated the obligation);

  (3)    An unrated  obligation  judged by the manager,  pursuant to  guidelines
         established by the Board of Trustees, to be of comparable quality.

   
    The fund intends to buy only  obligations  that are designated as first-tier
securities as defined by the SEC; that is, securities with the highest rating.
    


6      INFORMATION REGARDING THE FUND         AMERICAN CENTURY INVESTMENTS


    The  acquisition of securities  that are unrated or rated by only one rating
agency must be approved or ratified by the Board of Trustees.

DIVERSIFICATION

    In order to reduce  investment  risks,  the  manager is  required  by law to
diversify the fund's  investment  portfolio.  As a general rule, the manager may
not invest more than 5% of the fund's  total  assets in  securities  issued by a
single  institution.  In addition,  the fund must also limit its  investments in
securities subject to puts of a single institution.

    This policy does not apply to U.S. government securities,  in which the fund
may invest without limitation. See the Statement of Additional Information for a
more detailed description.

INDUSTRY CONCENTRATION

    Under normal market  conditions,  25% or more of the fund's total assets are
invested in  obligations  of issuers in the financial  services  industry.  This
industry  concentration  reflects that of the markets in which the fund invests.
More than half of the  markets'  commercial  paper is  issued  by  companies  or
organizations in the financial services industry.

    For temporary defensive  purposes,  less than 25% of the fund's total assets
may be invested in  obligations of issuers in the financial  services  industry.
The  manager  will not invest  more than 25% of the fund's  total  assets in any
other industry.

RISK FACTORS AND INVESTMENT TECHNIQUES

    The fund may be  appropriate  for  investors  who seek to (1) earn income at
current money market rates while preserving their investments;  (2) use the fund
as part of a long-term, balanced investment portfolio consisting of money market
instruments,  bonds, and stocks;  or (3) use the fund to place investment monies
as part of a dollar-cost averaging investment program.

    Because the fund emphasizes  stability,  it will not generate as much income
as a bond fund. No single fund constitutes a balanced investment plan.

    Corporations  and  governments   address  their  short-term   borrowing  and
cash-flow management needs in a highly liquid, worldwide financial market called
the "money  market." The following is a brief  description of the types of money
market instruments the fund may buy.

CORPORATE OBLIGATIONS

    Commercial paper is issued by large  corporations to raise cash. The maximum
maturity for commercial  paper is 270 days,  although most  commercial  paper is
issued  with  maturities  of 60 days or less.  Commercial  paper is offered at a
discount with its full face value paid at maturity.

    Although  commercial  paper rates generally  fluctuate with the value of the
London Interbank Offered Rate (LIBOR), Treasury bills, bankers' acceptances, and
certificates  of deposit,  they are also influenced by (1) the issuer's size and
credit rating and (2) the commercial paper maturity date.

    Smaller or  lower-rated  corporations  may tap the  commercial  paper market
through asset-backed  commercial paper programs. In a typical program, a special
purpose  corporation  (a  SPC),  created  and/or  serviced  by a bank,  uses the
proceeds from an issuance of commercial  paper to purchase  receivables from one
or more corporations (sellers).  The sellers transfer their interest in the cash
flow from the  receivables to the SPC, and this cash is used to pay interest and
repay principal on the commercial  paper.  Letters of credit may be available to
cover the risk that the cash flow from the receivables will not be sufficient to
cover the maturing commercial paper.

    The fund may purchase corporate notes and bonds with remaining maturities of
13 months or less in the secondary market provided that each of these securities
has  characteristics  consistent with regulatory  requirements  for money market
funds.

BANK OBLIGATIONS

    Negotiable  certificates  of deposit (CDs)  evidence a bank's  obligation to
repay money  deposited  with it for a specified  period of time. The table below
identifies the types of CDs the fund may buy.

- --------------------------------------------------------------------------------
CD Type                                   Issuer
- --------------------------------------------------------------------------------
Domestic                                  Domestic offices of U.S. banks
- --------------------------------------------------------------------------------
Yankee                                    U.S. branches of foreign banks
- --------------------------------------------------------------------------------
Eurodollar                                Issued in London by U.S.,
                                          Canadian, European, and
                                          Japanese banks
- --------------------------------------------------------------------------------
Schedule B                                Canadian subsidiaries of
                                          non-Canadian banks
- --------------------------------------------------------------------------------


PROSPECTUS                           INFORMATION REGARDING THE FUND       7


    Bankers' acceptances are used to finance foreign commercial trade. Issued by
a bank with an importer's name on them, these  instruments allow the importer to
back up its own pledge to pay for  imported  goods with a bank's  obligation  to
cover the transaction if the importer fails to do so.

    Bank notes are senior unsecured promissory notes issued in the United States
by domestic commercial banks.

    The bank  obligations the fund may buy generally are not insured by the FDIC
or any other insurer.

GOVERNMENT OBLIGATIONS

    U.S.  Treasury  securities  differ from one another in their interest rates,
maturities,  and issuance and interest  payment  schedules.  Treasury bills have
initial  maturities of one year or less;  Treasury notes,  two to ten years; and
Treasury bonds, more than ten years.

    A number of U.S. government agencies and government-sponsored  organizations
issue debt  securities.  These  agencies  generally  are  created by Congress to
fulfill a specific  need,  such as providing  credit for home buyers or farmers.
Among these  agencies are the Federal  Home Loan Banks,  the Federal Farm Credit
System,  the Student Loan  Marketing  Association,  and the  Resolution  Funding
Corporation.

    Some  obligations  issued  or  guaranteed  by U.S.  government  agencies  or
instrumentalities  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
Treasury; others are supported by the U.S. government's  discretionary authority
to purchase certain obligations of the agency or instrumentality, and others are
supported only by the credit of the issuing agency or instrumentality.

    Supranational  organizations (generally,  multilateral lending institutions,
or MLIs) are  created by  governments  to promote  economic  reconstruction  and
development.  An MLI's  creditworthiness  is based not only on its own financial
performance, but on the willingness and ability of member governments to support
its lending activities.

    While maintaining  strict financial  controls to ensure liquidity and strong
creditworthiness,  MLIs finance their operations in the same manner as any other
financial  institution,   with  a  combination  of  short-  and  long-term  debt
obligations.  Short-term  debt is  usually  issued  in the  form  of  short-term
discount notes and commercial paper.

VARIABLE AND FLOATING-RATE INSTRUMENTS

    Variable-  and   floating-rate   instruments  are  issued  by  corporations,
financial institutions, and government agencies and instrumentalities.

    Floating-rate  instruments have interest rates that change whenever there is
a change in a designated base rate, whereas  variable-rate  instruments  provide
for specified periodic interest rate adjustments. The interest rate on variable-
and floating-rate  instruments is ordinarily determined by reference to (or is a
percentage of) an objective standard,  such as the Federal Funds effective rate,
the 90-day U.S. Treasury bill rate, or LIBOR.

    Although  the fund  typically  limits its  investments  to  securities  with
remaining  maturities  of 13 months or less,  it may  invest  in  variable-  and
floating-rate  instruments that have nominal (or stated) maturities in excess of
13 months,  provided that such  instruments (1) have demand features  consistent
with  regulatory  requirements  for money market  funds,  or (2) are  securities
issued by the U.S.  government  or a U.S.  government  agency that meet  certain
regulatory requirements for money market funds.

RULE 144A SECURITIES

    The fund may,  from time to time,  purchase Rule 144A  securities  when they
present  attractive  investment  opportunities  that  otherwise  meet the fund's
criteria for selection.  Rule 144A  securities are securities that are privately
placed with and traded among qualified  institutional  investors rather than the
general  public.  Although  Rule  144A  securities  are  considered  "restricted
securities," they are not necessarily illiquid.

   
    With respect to securities eligible for resale under Rule 144A, the staff of
the SEC has taken the  position  that the  liquidity of such  securities  in the
portfolio of a fund offering redeemable securities is a question of fact for the
Board  of  Trustees  to  determine,  such  determination  to  be  based  upon  a
consideration  of the readily  available  trading  markets and the review of any
contractual  restrictions.  The staff also  acknowledges  that,  while the Board
retains ultimate responsibility, it may delegate this function to the manager.
    


8     INFORMATION REGARDING THE FUND             AMERICAN CENTURY INVESTMENTS


Accordingly, the Board has established guidelines and procedures for determining
the liquidity of Rule 144A securities and has delegated the day-to-day  function
of determining the liquidity of Rule 144A  securities to the manager.  The Board
retains the  responsibility to monitor the  implementation of the guidelines and
procedures it has adopted.

    Since the  secondary  market  for such  securities  is  limited  to  certain
qualified  institutional  investors,  the  liquidity of such  securities  may be
limited accordingly and a fund may, from time to time, hold a Rule 144A security
that is illiquid. In such an event, the fund's manager will consider appropriate
remedies to minimize  the effect on such  fund's  liquidity.  No fund may invest
more than 10% of its assets in illiquid  securities  (securities that may not be
sold within seven days at  approximately  the price used in determining  the net
asset value of fund shares).

U.S. DOLLAR-DENOMINATED FOREIGN SECURITIES

    The fund invests exclusively in U.S. dollar-denominated instruments, some of
which may be issued by foreign  entities  as  described  in the table on page 6.
Consequently,  the fund may be subject to risks different than those incurred by
a fund that invests only in debt obligations of domestic issuers.

    Currently,  the only  securities held outside the United States in which the
fund expects to invest are EuroCDs,  which are held in England. As a result, the
fund's exposure to these foreign  investment  risks is expected to be lower than
funds that invest more broadly in  securities  held  outside the United  States.
Regulatory limits specified in the section titled "Portfolio  Investment Quality
and Maturity  Criteria"  on page 6 apply  equally to  securities  of foreign and
domestic issuers.

OTHER INVESTMENT PRACTICES, THEIR CHARACTERISTICS
AND RISKS

   
    For additional information,  see "Investment  Restrictions" in the Statement
of Additional Information.
    

REPURCHASE AGREEMENTS

    The  fund may  enter  into  repurchase  agreements,  collateralized  by U.S.
government  securities,  with banks or broker-dealers that are deemed to present
minimum credit risk. A repurchase  agreement involves the purchase of a security
and a simultaneous agreement to sell the security back to the seller at a higher
price.  At the direction of the Board of Trustees,  the manager has  established
procedures  to minimize  potential  losses due to credit risk.  Delays or losses
could result if the other party to the agreement defaults or becomes bankrupt.

WHEN-ISSUED SECURITIES

   
    The fund may  sometimes  purchase new issues of  securities on a when-issued
basis or forward  commitment  basis when,  in the opinion of the  manager,  such
purchases  will  further  the  investment  objective  of the fund.  The price of
when-issued  securities is established at the time the commitment to purchase is
made. Delivery of and payment for these securities typically occur 15 to 45 days
after the commitment to purchase. Market rates of interest on debt securities at
the time of  delivery  may be higher or lower than those  contracted  for on the
when-issued security.  Accordingly, the value of such security may decline prior
to delivery,  which could  result in a loss to the fund. A separate  account for
each fund consisting of cash or appropriate  liquid assets in an amount at least
equal to the when-issued commitments will be established and maintained with the
custodian. No income will accrue to the fund prior to delivery.
    

BORROWING

    The  fund may  borrow  money  only  for  temporary  or  emergency  purposes.
Borrowings are not expected to exceed 5% of the fund's total assets.

OTHER TECHNIQUES

    The manager  may buy other types of  securities  or employ  other  portfolio
management   techniques  on  behalf  of  a  fund  including  reverse  repurchase
agreements.  When SEC  guidelines  require  it to do so, the fund will set aside
cash or  appropriate  liquid assets in a segregated  account to cover the fund's
obligations.

PERFORMANCE ADVERTISING

    From time to time, the fund may advertise performance data. Fund performance
may be shown  by  presenting  one or more  performance  measurements,  including
cumulative  total return or average  annual total  return,  yield and  effective
yield.  Performance data may be quoted  separately for the Advisor Class and for
the other class.


PROSPECTUS                           INFORMATION REGARDING THE FUND       9


    Cumulative  total  return data is computed by  considering  all  elements of
return,  including  reinvestment  of dividends and capital gains  distributions,
over a stated  period of time.  Average  annual  total return is  determined  by
computing  the annual  compound  return over a stated  period of time that would
have  produced  the fund's  cumulative  total return over the same period if the
fund's performance had remained constant throughout.

    A  quotation  of yield  reflects  the  fund's  income  over a stated  period
expressed as a percentage  of its share price.  Yield is calculated by measuring
the income  generated by an investment in the fund over a seven-day  period (net
of fund expenses). This income is then annualized, that is, the amount of income
generated by the investment over the seven-day period is assumed to be generated
over each  similar  period  each week  throughout  a full year and is shown as a
percentage of the  investment.  The  effective  yield is calculated in a similar
manner but, when  annualized,  the income earned by the investment is assumed to
be  reinvested.  The  effective  yield will be  slightly  higher  than the yield
because of the compounding effect on the assumed reinvestment.

    Yields are calculated  according to accounting methods that are standardized
in  accordance  with SEC  rules  for all stock  and bond  funds.  Because  yield
accounting methods differ from the methods used for other accounting purposes, a
fund's yield may not equal the income paid on its shares or the income  reported
in the fund's financial statements.

   
    The fund also may include in  advertisements  data comparing its performance
with the  performance  of  non-related  investment  media,  published  editorial
comments and performance rankings compiled by independent  organizations such as
Lipper  Analytical  Services or IBC's Money Fund  Report and  publications  that
monitor the performance of mutual funds.  Performance  information may be quoted
numerically  or may be presented  in a table,  graph or other  illustration.  In
addition,  fund  performance  may be  compared to  well-known  indices of market
performance  including  the IBC's  Money  Fund  Average  and Bank  Rate  Monitor
National  Index  of 2  (1)/(2)  year CD  rates.  Fund  performance  also  may be
compared,  on a relative basis, to other funds in our fund family. This relative
comparison, which may be based upon historical fund performance or historical or
expected volatility or other fund characteristics, may be presented numerically,
graphically or in text.  Fund  performance  also may be combined or blended with
other funds in our fund family, and that combined or blended  performance may be
compared to the same indices to which individual funds may be compared.
    

    All performance  information  advertised by the fund is historical in nature
and is not intended to represent or guarantee future results.  The value of fund
shares when redeemed may be more or less than their original cost.


10      INFORMATION REGARDING THE FUND         AMERICAN CENTURY INVESTMENTS


                HOW TO INVEST WITH AMERICAN CENTURY INVESTMENTS

AMERICAN CENTURY INVESTMENTS

    The following sections explain how to purchase,  exchange and redeem Advisor
Class shares of the funds offered by this Prospectus.

    To reduce  expenses and  demonstrate  respect for our  environment,  we have
initiated a project  through which we will  eliminate  duplicate  copies of most
financial  reports and  prospectuses  to most  households  and  deliver  account
statements to most households in a single envelope,  even if they have more than
one  account.  If you would like  additional  copies of  financial  reports  and
prospectuses or separate mailing of account statements, please call us.

HOW TO PURCHASE AND SELL
AMERICAN CENTURY FUNDS

    The fund offered by this  Prospectus  is available as an  investment  option
under  your  employer-sponsored  retirement  or  savings  plan or  through or in
connection   with  a  program,   product  or  service  offered  by  a  financial
intermediary,  such as a bank,  broker-dealer  or insurance  company.  Since all
records  of your share  ownership  are  maintained  by your plan  sponsor,  plan
recordkeeper, or other financial intermediary,  all orders to purchase, exchange
and  redeem  shares  must be made  through  your  employer  or  other  financial
intermediary, as applicable.

    If  you  are   purchasing   through  a  retirement  or  savings  plan,   the
administrator of your plan or your employee benefits office can provide you with
information  on how to  participate  in your  plan  and how to  select  American
Century funds as an investment option.

    If you are purchasing through a financial  intermediary,  you should contact
your service  representative at the financial intermediary for information about
how to select American Century funds.

    If you have questions about a fund, see  "Investment  Policies of the Fund,"
page  6,  or  call  one  of  our  Institutional   Service   Representatives   at
1-800-345-3533.

    Orders to purchase shares are effective on the day we receive payment. See
"When Share Price Is Determined," page 12.

   
    We may  discontinue  offering  shares  generally in the fund  (including any
class  of  shares  of a fund)  or in any  particular  state  without  notice  to
shareholders.
    

HOW TO EXCHANGE FROM ONE AMERICAN
CENTURY FUND TO ANOTHER

    Your plan or program  may  permit you to  exchange  your  investment  in the
shares  of a fund for  shares  of  another  fund in our  family.  See your  plan
administrator, employee benefits office or financial intermediary for details on
the rules in your plan governing exchanges.

HOW TO REDEEM SHARES

    Subject to any  restrictions  imposed by your  employer's  plan or financial
intermediary's  program,  you can sell ("redeem") your shares at their net asset
value  through  the plan or  financial  intermediary.  Your plan  administrator,
trustee,  financial intermediary or other designated person must provide us with
redemption instructions. The shares will be redeemed at the net asset value next
computed after receipt of the  instructions in good order. See "When Share Price
Is Determined," page 12. If you have any questions about how to redeem,  contact
your plan administrator,  employee benefits office, or service representative at
your financial intermediary, as applicable.

TELEPHONE SERVICES

INVESTORS LINE

    To  request  information  about our funds and a current  prospectus,  or get
answers to any  questions  that you may have about the funds and the services we
offer, call one of our Institutional Service Representatives at 1-800-345-3533.


PROSPECTUS             HOW TO INVEST WITH AMERICAN CENTURY INVESTMENTS     11


                    ADDITIONAL INFORMATION YOU SHOULD KNOW

SHARE PRICE

WHEN SHARE PRICE IS DETERMINED

    The price of your shares is also  referred to as their net asset value.  Net
asset value is determined  by  calculating  the total value of a fund's  assets,
deducting  total  liabilities  and  dividing  the result by the number of shares
outstanding.  For all American  Century  funds,  except funds issued by American
Century Target  Maturities  Trust, net asset value is determined as of the close
of regular trading on each day that the New York Stock Exchange is open, usually
3 p.m.  Central  time.  The net asset  values  for Target  Maturities  funds are
determined one hour prior to the close of the Exchange.

    Investments and requests to redeem or exchange shares will receive the share
price next  determined  after  receipt by us of the  investment,  redemption  or
exchange  request.  For example,  investments and requests to redeem or exchange
shares  received by us or one of our agents or  designees  before the time as of
which the net asset value of the fund is determined,  are effective on, and will
receive the price  determined,  that day.  Investment,  redemption  and exchange
requests received  thereafter are effective on, and receive the price determined
as of, the close of the Exchange on the next day the Exchange is open.

    Investments  are  considered  received  only when payment is received by us.
Wired funds are  considered  received on the day they are  deposited in our bank
account if they are deposited before the time as of which the net asset value of
the fund is determined.

    Investments by telephone pursuant to your prior  authorization to us to draw
on your bank account are considered received at the time of your telephone call.

    Investment and transaction  instructions  received by us on any business day
by mail  prior  to the  time as of  which  the net  asset  value  of the fund is
determined, will receive that day's price. Investments and instructions received
after that time will receive the price determined on the next business day.

   
    If you invest in fund shares through an  employer-sponsored  retirement plan
or  other  financial  intermediary,  it  is  the  responsibility  of  your  plan
recordkeeper or financial  intermediary to transmit your purchase,  exchange and
redemption requests to the fund's transfer agent prior to the applicable cut-off
time for receiving  orders and to make payment for any purchase  transactions in
accordance with the fund's  procedures or any contractual  arrangements with the
fund or the fund's distributor in order for you to receive that day's price.
    

    We have contractual  relationships with certain financial  intermediaries in
which such intermediaries  represent that they have systems to track the time at
which  investment  orders are  received  and to  segregate  orders  received  at
different times.  Based on these  representations,  the fund has authorized such
intermediaries  and their designees to accept purchase and redemption  orders on
the fund's behalf up to the applicable  cut-off time. The fund will be deemed to
have received such orders upon acceptance by the duly  authorized  intermediary,
and such  orders  will be priced at the fund's net asset  value next  determined
after acceptance on the fund's behalf by such intermediary.

HOW SHARE PRICE IS DETERMINED

    The valuation of assets for determining net asset value may be summarized as
follows:

    The portfolio  securities of the fund, except as otherwise noted,  listed or
traded on a domestic  securities  exchange  are valued at the last sale price on
that  exchange.  Portfolio  securities  primarily  traded on foreign  securities
exchanges  generally  are  valued  at  the  preceding  closing  values  of  such
securities on the exchange where primarily traded. If no sale is reported, or if
local convention or regulation so provides, the mean of the latest bid and asked
prices is used.  Depending on local convention or regulation,  securities traded
over-the-counter  are priced at the mean of the latest bid and asked prices,  or
at the last sale  price.  When  market  quotations  are not  readily  available,
securities and other assets are valued at fair


12    ADDITIONAL INFORMATION YOU SHOULD KNOW      AMERICAN CENTURY INVESTMENTS


value as  determined  in  accordance  with  procedures  adopted  by the Board of
Trustees.

    Debt  securities  not traded on a principal  securities  exchange are valued
through  valuations  obtained from a commercial  pricing  service or at the most
recent  mean of the bid and asked  prices  provided  by  investment  dealers  in
accordance with procedures established by the Board of Trustees.

    Pursuant to a  determination  by the fund's  Board of Trustees and Rule 2a-7
under the Investment Company Act of 1940,  portfolio  securities of the fund are
valued at amortized  cost.  When a security is valued at amortized  cost,  it is
valued at its cost  when  purchased,  and  thereafter  by  assuming  a  constant
amortization to maturity of any discount or premium, regardless of the impact of
fluctuating interest rates on the market value of the instrument.

WHERE TO FIND YIELD INFORMATION

    The yield of the Investor  Class of the fund is published  weekly in leading
financial  publications  and daily in many local  newspapers.  Because the total
expense  ratio for the Advisor  Class  shares is 0.25%  higher than the Investor
Class shares, the yield will be lower than the Investor Class. Yield information
of the Advisor Class may be obtained by calling us.

DISTRIBUTIONS

    At the  close  of each  day,  including  Saturdays,  Sundays  and  holidays,
dividends are declared and credited (i.e.,  available for redemption)  daily and
distributed monthly on the last Friday of each month.

    You will  begin to  participate  in the  distributions  the day  after  your
purchase is effective.  See "When Share Price Is  Determined" on page 12. If you
redeem  shares,  you will receive the  distribution  declared for the day of the
redemption.  If all  shares  are  redeemed  (other  than by  CheckWriting),  the
distribution  on the  redeemed  shares  will be  included  with your  redemption
proceeds.

    The fund  does not  expect to  realize  any  long-term  capital  gains  and,
accordingly, does not expect to make any capital gains distributions.

    Participants in employer-sponsored retirement or savings plans must reinvest
all  distributions.   For  shareholders   investing  through  taxable  accounts,
distributions  will be  reinvested  unless  you elect to  receive  them in cash.
Distributions of less than $10 generally will be reinvested.  Distributions made
shortly  after a  purchase  by check  or ACH may be held up to 15 days.  You may
elect to have distributions on shares held in certain IRAs and 403(b) plans paid
in cash only if you are at least 59 (1)/(2) years old or permanently and totally
disabled.  Distribution  checks  normally are mailed within seven days after the
record date. Please consult our Investor Services Guide for further  information
regarding your distribution options.

TAXES

    The fund has elected to be taxed under  Subchapter M of the Internal Revenue
Code,  which means that to the extent its income is distributed to shareholders,
it pays no income tax.

TAX-DEFERRED ACCOUNTS

    If fund  shares  are  purchased  through  tax-deferred  accounts,  such as a
qualified  employer-sponsored  retirement  or savings  plan,  income and capital
gains  distributions  paid by the fund will  generally not be subject to current
taxation,  but will  accumulate in your account under the plan on a tax-deferred
basis.

    Employer-sponsored  retirement and savings plans are governed by complex tax
rules.  If you elect to participate in your employer's  plan,  consult your plan
administrator,  your plan's  summary plan  description,  or a  professional  tax
advisor   regarding  the  tax   consequences  of   participation  in  the  plan,
contributions to, and withdrawals or distributions from the plan.

TAXABLE ACCOUNTS

    If fund shares are purchased through taxable accounts,  distributions of net
investment  income  and net  short-term  capital  gains  are  taxable  to you as
ordinary  income,  except as described  below. The dividends from net income may
qualify for the 70% dividends  received deduction for corporations to the extent
that the  fund  held  shares  receiving  the  dividend  for  more  than 45 days.
Distributions  from gains on assets  held longer than 12 months but no more than
18 months  (28% rate gain)  and/or  assets  held longer than 18 months (20% rate
gain) are taxable as long-term  gains  regardless of the length of time you have
held the shares.  However,  you should note that any loss realized upon the sale
or redemption of


PROSPECTUS                    ADDITIONAL INFORMATION YOU SHOULD KNOW      13


shares held for six months or less will be treated as a long-term  capital  loss
to the extent of any  distribution  of  long-term  capital gain (28% or 20% rate
gain) to you with respect to such shares.

    Distributions  are taxable to you  regardless  of whether  they are taken in
cash or reinvested,  even if the value of your shares is below your cost. If you
purchase shares shortly before a distribution,  you must pay income taxes on the
distribution,  even though the value of your investment (plus cash received,  if
any) will not have  increased.  In  addition,  the  share  price at the time you
purchase  shares may  include  unrealized  gains in the  securities  held in the
investment portfolio of the fund. If these portfolio securities are subsequently
sold and the gains are realized,  they will, to the extent not offset by capital
losses, be paid to you as a distribution of capital gains and will be taxable to
you as short-term or long-term capital gains (28% and/or 20% rate gain).

    In January of the year  following the  distribution,  if you own shares in a
taxable account, you will receive a Form 1099-DIV notifying you of the status of
your distributions for federal income tax purposes.

    Distributions also may be subject to state and local taxes, even if all or a
substantial  part  of such  distributions  are  derived  from  interest  on U.S.
government  obligations  which,  if you received them directly,  would be exempt
from state income tax. However, most but not all states allow this tax exemption
to pass  through  to fund  shareholders  when a fund pays  distributions  to its
shareholders.  You should  consult your tax advisor about the tax status of such
distributions in your own state.

    If you have not complied  with certain  provisions  of the Internal  Revenue
Code and Regulations,  we or your financial intermediary are required by federal
law to  withhold  and remit to the IRS 31% of  reportable  payments  (which  may
include  dividends,   capital  gains   distributions  and  redemptions).   Those
regulations  require  you to  certify  that the  Social  Security  number or tax
identification number you provide is correct and that you are not subject to 31%
withholding for previous  under-reporting  to the IRS. You will be asked to make
the appropriate certification on your application.  Payments reported by us that
omit your Social Security number or tax identification number will subject us to
a penalty  of $50,  which will be charged  against  your  account if you fail to
provide the  certification  by the time the report is filed.  This charge is not
refundable.

   
    In addition to the federal income tax consequences  described above relating
to an  investment  in a fund,  there  may be other  federal,  state or local tax
considerations  that depend upon the circumstances of each particular  investor.
Prospective  shareholders are therefore urged to consult their tax advisors with
respect to the effect of this investment on their own specific situations.
    

MANAGEMENT

INVESTMENT MANAGEMENT

    The fund is the sole series of the American  Century  Investment  Trust (the
Trust).  Under  the laws of the  Commonwealth  of  Massachusetts,  the  Board of
Trustees is  responsible  for  managing  the  business and affairs of the Trust.
Acting  pursuant to an  investment  management  agreement  entered into with the
fund,  American  Century  Investment  Management,  Inc. serves as the investment
manager of the fund. Its principal place of business is American  Century Tower,
4500 Main Street,  Kansas City,  Missouri 64111.  The manager has been providing
investment advisory services to investment  companies and institutional  clients
since it was founded in 1958.

    The manager supervises and manages the investment  portfolio of the fund and
directs the purchase and sale of its investment  securities.  It utilizes a team
of portfolio managers, assistant portfolio managers and analysts acting together
to manage the assets of the fund. The team meets  regularly to review  portfolio
holdings and to discuss purchase and sale activity. The team adjusts holdings in
the fund's portfolio as it deems appropriate in pursuit of the fund's investment
objective.  Individual  portfolio  manager  members of the team may also  adjust
portfolio holdings of the fund as necessary between team meetings.

   
    The portfolio  manager  members of the team  managing the fund  described in
this  Prospectus  and  their  work  experience  for the last  five  years are as
follows:

    DENISE TABACCO, Portfolio Manager, joined American Century in 1988, becoming
a member of its  portfolio  department  in 1991. In 1995 she assumed her current
position as a Portfolio Manager.
    


14   ADDITIONAL INFORMATION YOU SHOULD KNOW    AMERICAN CENTURY INVESTMENTS


   
    JOHN F. WALSH,  Portfolio Manager,  joined American Century in February 1996
as an Investment Analyst, a position he held until May 1997. At that time he was
promoted to Portfolio  Manager.  Prior to joining  American  Century,  Mr. Walsh
served as an Assistant Vice President and Analyst at First  Interstate Bank, Los
Angeles,  California, from July 1993 to January 1996. Prior to that he served as
an Analyst at The Long-Term Credit Bank of Japan, Los Angeles, California.
    

   
    The  activities  of the manager are subject only to directions of the fund's
Board of  Trustees.  The  manager  pays  all the  expenses  of the  fund  except
brokerage,  taxes,  interest,  fees and  expenses of the  non-interested  person
trustees (including counsel fees) and extraordinary expenses.

    For the services  provided to the fund,  the manager  receives a monthly fee
based on a percentage of the average net assets of the fund.  The annual rate at
which this fee is assessed is determined monthly in a two-step process. First, a
fee rate  schedule  is  applied  to the  assets  of all of the funds in a fund's
investment  category which are managed by the manager (the  Investment  Category
Fee). The three  investment  categories are: Money Market Funds,  Bond Funds and
Equity Funds.  Second,  a separate fee rate schedule is applied to the assets of
all of the funds  managed by the  manager  (the  Complex  Fee).  The  Investment
Category  Fee and the  Complex  Fee are then  added  to  determine  the  unified
management  fee payable by the fund to the manager.  Currently,  the  Investment
Category  Fee for the fund is an annual  rate of 0.30% of the average net assets
of the fund.  The Complex Fee for the Advisor  Class is currently an annual rate
of 0.05% of the average net assets of the fund.  Further  information  about the
calculation  of the annual  management  fee is  contained  in the  Statement  of
Additional Information.
    

    On the first  business day of each month,  the fund pays a management fee to
the  manager  for the  previous  month at the  specified  rate.  The fee for the
previous month is calculated by  multiplying  the applicable fee for the fund by
the  aggregate  average  daily closing value of the fund's net assets during the
previous  month,  and  further  multiplying  that  product  by a  fraction,  the
numerator  of  which  is the  number  of  days  in the  previous  month  and the
denominator of which is 365 (366 in leap years).

CODE OF ETHICS

    The fund and the  manager  have  adopted  a Code of  Ethics  that  restricts
personal  investing  practices by  employees of the manager and its  affiliates.
Among other  provisions,  the Code of Ethics requires that employees with access
to information about the purchase or sale of securities in the fund's portfolios
obtain  preclearance before executing personal trades. With respect to Portfolio
Managers  and  other  investment   personnel,   the  Code  of  Ethics  prohibits
acquisition  of securities  in an initial  public  offering,  as well as profits
derived from the purchase and sale of the same security within 60 calendar days.
These provisions are designed to ensure that the interests of fund  shareholders
come before the interests of the people who manage those funds.

TRANSFER AND ADMINISTRATIVE SERVICES

    American Century  Services  Corporation,  American Century Tower,  4500 Main
Street,  Kansas City, Missouri 64111, acts as transfer agent and dividend-paying
agent for the fund. It provides facilities, equipment and personnel to the fund,
and is paid for such services by the manager.

    Although there is no sales charge levied by the fund, transactions in shares
of the fund may be  executed  by brokers  or  investment  advisors  who charge a
transaction-based  fee or other fee for their  services.  Such  charges may vary
among  broker-dealers and financial advisors,  but in all cases will be retained
by the  broker-dealer  or financial  advisor and not remitted to the fund or the
manager.  You  should be aware of the fact that these  transactions  may be made
directly with American Century without incurring such fees.

    From time to time,  special  services  may be  offered to  shareholders  who
maintain  higher  share  balances  in our family of funds.  These  services  may
include the waiver of minimum investment requirements, expedited confirmation of
shareholder  transactions,  newsletters and a team of personal  representatives.
Any expenses  associated with these special services will be paid by the manager
or its affiliates.

    The manager and the transfer agent are both wholly owned by American Century
Companies,  Inc. (ACC). James E. Stowers Jr., Chairman of the Board of Directors
of ACC,  controls  ACC by virtue of his  ownership  of a majority  of its common
stock.


PROSPECTUS                   ADDITIONAL INFORMATION YOU SHOULD KNOW       15


    Pursuant  to  a  Sub-Administration   Agreement  with  the  manager,   Funds
Distributor  Inc.  (FDI) serves as the  Co-Administrator  for the funds.  FDI is
responsible for (i) providing  certain  officers of the funds and (ii) reviewing
and filing  marketing and sales  literature on behalf of the funds. The fees and
expenses of FDI are paid by the manager.

   
YEAR 2000 ISSUES

    Many of the world's computer systems currently cannot properly  recognize or
process  date-sensitive  information  relating to the Year 2000 and beyond.  The
fund and the  manager  depend  upon the  computer  systems  of  various  service
providers,  including  the  transfer  agent,  for their  day-to-day  operations.
Inadequate  remediation of the Year 2000 problem by these service  providers and
others  with whom they  interact  could  have an  adverse  effect on the  fund's
operations,  including  pricing,  securities  trading  and  settlement,  and the
provision of shareholder services.

    The transfer agent, in cooperation with the manager, has assembled a team of
information  technology  professionals who are taking steps to address Year 2000
issues with respect to its own computers and to obtain  satisfactory  assurances
that  comparable  steps are being  taken by the fund's and the  manager's  other
major service  providers  and vendors.  The key phases of the  remediation  plan
include: an inventory of all internal systems,  vendor products and services and
data providers  (substantially  completed in 1997); an assessment of all systems
for date reliance and the impact of the century rollover on each  (substantially
completed  with respect to critical  systems in early 1998);  and the renovation
and  testing of  affected  systems  (targeted  for  completion  with  respect to
critical  systems by the end of 1998).  The manager will pay for the remediation
effort with revenues from its management fee, so that the fund will not directly
bear any of the cost.

    In light of these  remediation  efforts,  the  fund  does not  anticipate  a
material  adverse  impact on its  business,  operations  or financial  condition
relating  to Year  2000  issues.  However,  there can be no  assurance  that the
remediation  plan will be sufficient and timely or that  interaction  with other
noncomplying  computer  systems will not have a material  adverse  effect on the
fund's business, operations or financial condition.

    In addition, companies in which the fund invests may have Year 2000 computer
problems.  The value of their  securities could go down if they do not fix their
problems  in  time  or if  fixing  them  is very  expensive.  Before  making  an
investment  decision  about a company,  the manager  asks it about its Year 2000
readiness.  However, the manager cannot be sure that the information it receives
is complete and accurate,  and there is no guarantee that  portfolio  companies'
Year 2000 problems will not hurt the fund's performance.
    

DISTRIBUTION OF FUND SHARES

   
    The fund's shares are distributed by FDI, a registered broker-dealer. FDI is
a wholly-owned,  indirect subsidiary of Boston  Institutional  Group, Inc. FDI's
principal business address is 60 State Street, Suite 1300, Boston, Massachusetts
02109.  As agent  for the fund and the  manager,  the  distributor  enters  into
contracts  with various  banks,  broker-dealers,  insurance  companies and other
financial  intermediaries  with respect to the sale of the fund's  shares and/or
the use of the fund's shares in various financial  services.  The manager (or an
affiliate) pays all expenses  incurred in promoting sales of, and  distributing,
the  Advisor  Class and in  securing  such  services  out of the Rule 12b-1 fees
described in the section that follows.

    Investors  may  open  accounts  with  American   Century  only  through  the
distributor.  All purchase  transactions  in the fund offered by this Prospectus
are  processed  by the  transfer  agent,  which  is  authorized  to  accept  any
instructions relating to fund accounts.  All purchase orders must be accepted by
the  distributor.  All fees and expenses of FDI in acting as distributor for the
fund are paid by the manager.
    

SERVICE AND DISTRIBUTION FEES

   
    Rule  12b-1  adopted by the SEC under the  Investment  Company  Act  permits
investment  companies  that  adopt  a  written  plan  to  pay  certain  expenses
associated  with the  distribution  of their shares.  Pursuant to that rule, the
funds' Board of Trustees and the initial shareholder of the funds' Advisor Class
shares have  approved and entered  into a Master  Distribution  and  Shareholder
Services Plan (the "Plan") with the distributor.  Pursuant to the Plan, the fund
pays a shareholder services fee and a distribution fee, each equal to 0.25% (for
a total of 0.50%) per annum of the average daily net assets of the shares of the
fund's Advisor Class. The shareholder services fee
    


16   ADDITIONAL INFORMATION YOU SHOULD KNOW     AMERICAN CENTURY INVESTMENTS


   
is paid for the purpose of paying the costs of securing certain  shareholder and
administrative  services,  and the  distribution  fee is paid for the purpose of
paying the costs of providing various distribution services. All or a portion of
such fees are paid by the manager,  as paying agent for the fund,  to the banks,
broker-dealers,  insurance companies or other financial  intermediaries  through
which such shares are made available.
    

    The Plan has been adopted and will be  administered  in accordance  with the
requirements  of Rule 12b-1 under the  Investment  Company Act.  For  additional
information about the Plan and its terms, see "Multiple Class Structure - Master
Distribution  and  Shareholder  Services  Plan" in the  Statement of  Additional
Information. Fees paid pursuant to the Plan may be paid for shareholder services
and the maintenance of accounts and therefore may constitute  "service fees" for
purposes of applicable rules of the National Association of Securities Dealers.

FURTHER INFORMATION ABOUT AMERICAN CENTURY

    The Trust is an open-end  management  investment  company.  Its business and
affairs  are  managed  by its  officers  under  the  direction  of its  Board of
Trustees.

   
    The  principal  office  of the fund is  American  Century  Tower,  4500 Main
Street, P.O. Box 419385, Kansas City, Missouri 64141-6385.  All inquiries may be
made by mail to that address,  or by telephone to 1-800-345-3533  (international
calls: 816-531-5575).
    

    The fund is the sole series of the Trust,  which  issues  shares with no par
value. Additional series of the Trust may be created in the future. In the event
that such other  series are  created,  the assets  belonging  to each  series of
shares will be held  separately  by the custodian and in effect each series will
be a separate fund.

    American  Century offers two classes of the fund offered by this Prospectus:
an Investor  Class and an Advisor Class.  The shares offered by this  Prospectus
are Advisor Class shares.

    The Investor  Class is primarily  made  available to retail  investors.  The
other class has different fees, expenses, and/or minimum investment requirements
than the Advisor Class.  The difference in the fee structures  among the classes
is the result of their separate  arrangements  for shareholder and  distribution
services and not the result of any difference in amounts  charged by the manager
for core investment advisory services. Accordingly, the core investment advisory
expenses  do not  vary  by  class.  Different  fees  and  expenses  will  affect
performance. For additional information concerning the Investor Class of shares,
call one of our Investor Services Representatives at 1-800-345-2021.

    Except as described  below,  all classes of shares of a fund have  identical
voting,  dividend,   liquidation  and  other  rights,  preferences,   terms  and
conditions.  The only  differences  among the various classes are (a) each class
may be subject to different  expenses specific to that class, (b) each class has
a different identifying designation or name, (c) each class has exclusive voting
rights with respect to matters  solely  affecting  such class and (d) each class
may have different exchange privileges.

    Each  share,  irrespective  of series or class,  is entitled to one vote for
each dollar of net asset value applicable to such share on all questions, except
for those  matters  that must be voted on  separately  by the series or class of
shares affected.  Matters affecting only one series or class are voted upon only
by that series or class.

    Shares have  non-cumulative  voting rights,  which means that the holders of
more than 50% of the votes cast in an election of trustees  can elect all of the
trustees if they choose to do so, and in such event the holders of the remaining
votes will not be able to elect any person or persons to the Board of Trustees.

    Unless required by the Investment  Company Act, it will not be necessary for
the Trust to hold annual meetings of shareholders. As a result, shareholders may
not vote each year on the election of trustees or the  appointment  of auditors.
However,  pursuant to the Trust's by-laws, the holders of shares representing at
least  10% of the  votes  entitled  to be cast may  request  the Trust to hold a
special meeting of shareholders.  We will assist in the communication with other
shareholders.

    WE RESERVE THE RIGHT TO CHANGE ANY OF OUR POLICIES, PRACTICES AND PROCEDURES
DESCRIBED IN THIS PROSPECTUS, INCLUDING THE STATEMENT OF ADDITIONAL INFORMATION,
WITHOUT  SHAREHOLDER  APPROVAL  EXCEPT  IN  THOSE  INSTANCES  WHERE  SHAREHOLDER
APPROVAL IS EXPRESSLY REQUIRED.


PROSPECTUS                   ADDITIONAL INFORMATION YOU SHOULD KNOW       17


P.O. BOX 419385
KANSAS CITY, MISSOURI
64141-6385

INSTITUTIONAL SERVICES:
1-800-345-3533 OR 816-531-5575

AUTOMATED INFORMATION LINE:
1-800-345-8765

TELECOMMUNICATIONS DEVICE FOR THE DEAF:
1-800-345-1833 OR 816-444-3038

FAX: 816-340-4655

www.americancentury.com

                        [american century logo(reg. sm)]
                                    American
                                Century(reg.tm)

   
9806           [recycled logo]
SH-BKT-12371      Recycled
<PAGE>
    
                                   PROSPECTUS

                        [american century logo(reg. sm)]
                                    American
                                Century(reg.tm)
                                   Brokerage
   
                                  JUNE 1, 1998
    

                                    BENHAM
                                 GROUP(reg.tm)

                              Prime Money Market

INVESTOR CLASS


                         AMERICAN CENTURY INVESTMENTS
                                FAMILY OF FUNDS

    American  Century  Investments  offers you nearly 70 fund  choices  covering
stocks, bonds, money markets,  specialty investments and blended portfolios.  To
help you find the funds that may meet your investment  needs,  American  Century
funds  have  been  divided  into  three  groups  based on  investment  style and
objectives. These groups, which appear below, are designed to help simplify your
fund decisions.

   
                        AMERICAN CENTURY INVESTMENTS
- -------------------------------------------------------------------------------
        Benham                American Century          Twentieth Century
        Group                      Group                      Group
- -------------------------------------------------------------------------------
   MONEY MARKET FUNDS         ASSET ALLOCATION &           GROWTH FUNDS
 GOVERNMENT BOND FUNDS          BALANCED FUNDS          INTERNATIONAL FUNDS
 DIVERSIFIED BOND FUNDS   CONSERVATIVE EQUITY FUNDS
  MUNICIPAL BOND FUNDS         SPECIALTY FUNDS
- -------------------------------------------------------------------------------
      Prime Money
         Market
    


                                  PROSPECTUS

   
                                 JUNE 1, 1998
    

                              Prime Money Market

                                INVESTOR CLASS

   
                       AMERICAN CENTURY INVESTMENT TRUST

    American Century Investment Trust is a part of American Century Investments,
a family of funds  that  includes  nearly 70  no-load  mutual  funds  covering a
variety of  investment  opportunities.  One of the money  market  funds from our
Benham Group is described in this Prospectus. Its investment objective is listed
on  page  2 of the  Prospectus.  The  other  funds  are  described  in  separate
prospectuses.
    

    Through its Investor Class of shares,  American  Century offers  investors a
full  line  of  no-load  funds,  investments  that  have  no  sales  charges  or
commissions.

   
    This Prospectus  gives you  information  about the fund that you should know
before investing. Please read this Prospectus carefully and retain it for future
reference.  Additional  information  is included in the  Statement of Additional
Information  dated June 1,  1998,  and filed with the  Securities  and  Exchange
Commission  (SEC).  It is  incorporated  into this  Prospectus by reference.  To
obtain a copy without charge, call or write:

                      AMERICAN CENTURY INVESTMENTS
                   4500 Main Street * P.O. Box 419200
            Kansas City, Missouri 64141-6200 * 1-800-345-2021
                   International calls: 816-531-5575
                Telecommunications Device for the Deaf:
              1-800-634-4113 * In Missouri: 816-444-3485
                        www.americancentury.com
    

    Additional  information,  including  this  Prospectus  and the  Statement of
Additional Information,  may be obtained by accessing the Web site maintained by
the SEC (www.sec.gov).

   
THESE  SECURITIES  HAVE NOT BEEN APPROVED OR  DISAPPROVED  BY THE SECURITIES AND
EXCHANGE COMMISSION OR ANY STATE SECURITIES  COMMISSION,  NOR HAS THE SECURITIES
AND  EXCHANGE  COMMISSION  OR ANY STATE  SECURITIES  COMMISSION  PASSED UPON THE
ACCURACY OR ADEQUACY OF THIS PROSPECTUS. ANY REPRESENTATION TO THE CONTRARY IS A
CRIMINAL OFFENSE.
    


PROSPECTUS                                                                1


                       INVESTMENT OBJECTIVE OF THE FUND

AMERICAN CENTURY-BENHAM
PRIME MONEY MARKET FUND

   
    The fund's  investment  objective  is to seek the  highest  level of current
income consistent with the preservation of capital.
    

    The fund buys high-quality, U.S. dollar-denominated money market instruments
and other short-term obligations of banks, governments and corporations.

    INVESTMENTS IN THE FUND ARE NOT INSURED NOR ARE THEY  GUARANTEED BY THE U.S.
GOVERNMENT OR ANY OTHER AGENCY. THERE IS NO ASSURANCE THAT THE FUND WILL BE ABLE
TO MAINTAIN A $1.00 SHARE PRICE.

   
  There is no assurance that the fund will achieve its investment objective.
    

NO  PERSON  IS  AUTHORIZED  BY THE  FUND TO GIVE  ANY  INFORMATION  OR MAKE  ANY
REPRESENTATION OTHER THAN THOSE CONTAINED IN THIS PROSPECTUS OR IN OTHER PRINTED
OR WRITTEN  MATERIAL ISSUED BY OR ON BEHALF OF THE FUND, AND YOU SHOULD NOT RELY
ON ANY OTHER INFORMATION OR REPRESENTATION.


2      INVESTMENT OBJECTIVE                   AMERICAN CENTURY INVESTMENTS


                               TABLE OF CONTENTS

Investment Objective of the Fund ..........................................    2
Transaction and Operating Expense Table ...................................    4
Financial Highlights ......................................................    5

INFORMATION REGARDING THE FUND

Investment Policies of the Fund ...........................................    6
    Eligible Investments ..................................................    6
    Portfolio Investment Quality and
       Maturity Criteria ..................................................    6
    Diversification .......................................................    7
    Industry Concentration ................................................    7
Risk Factors and Investment Techniques ....................................    7
    Corporate Obligations .................................................    7
    Bank Obligations ......................................................    7
    Government Obligations ................................................    8
    Variable and Floating-Rate Instruments ................................    8
    Rule 144A Securities ..................................................    8
    U.S. Dollar-Denominated Foreign Securities ............................    9
Other Investment Practices, Their Characteristics
  and Risks ...............................................................    9
    Repurchase Agreements .................................................    9
    When-Issued Securities ................................................    9
    Borrowing .............................................................    9
    Other Techniques ......................................................    9
Performance Advertising ...................................................    9

HOW TO INVEST WITH AMERICAN CENTURY INVESTMENTS

   
How to Purchase and Sell
  American Century Funds ..................................................   11
How to Exchange from one American
  Century Fund to Another .................................................   11
How to Redeem Shares ......................................................   11
Telephone Services ........................................................   11
    Investors Line ........................................................   11
    

ADDITIONAL INFORMATION YOU SHOULD KNOW

Share Price ...............................................................   12
    When Share Price Is Determined ........................................   12
    How Share Price Is Determined .........................................   12
    Where to Find Yield Information .......................................   13
Distributions .............................................................   13
Taxes .....................................................................   13
    Tax-Deferred Accounts .................................................   13
    Taxable Accounts ......................................................   13
Management ................................................................   14
    Investment Management .................................................   14
    Code of Ethics ........................................................   15
    Transfer and Administrative Services ..................................   15
    Year 2000 Issues ......................................................   16
Distribution of Fund Shares ...............................................   16
Further Information About American Century ................................   16


PROSPECTUS                                        TABLE OF CONTENTS       3


                    TRANSACTION AND OPERATING EXPENSE TABLE

                                                                  Prime Money
                                                                     Market

SHAREHOLDER TRANSACTION EXPENSES:

Maximum Sales Load Imposed on Purchases ..........................    none
Maximum Sales Load Imposed on Reinvested Dividends ...............    none
Deferred Sales Load ..............................................    none
Redemption Fee(1) ................................................    none
Exchange Fee .....................................................    none

   
ANNUAL FUND OPERATING EXPENSES:
(as a percentage of average net assets)
    

   
Management Fees(2) ...............................................   0.60%
12b-1 Fees .......................................................    none
Other Expenses(3) ................................................   0.00%
Total Fund Operating Expenses (net of expense limitation) ........   0.60%
    

EXAMPLE:

You would pay the following expenses on a                  1 year     $  6
$1,000 investment, assuming a 5% annual return and        3 years       19
redemption at the end of each time period:                5 years       33
                                                         10 years       75

(1) Redemption proceeds sent by wire are subject to a $10 processing fee.

   
(2) A portion of the management  fee may be paid by the manager to  unaffiliated
    third parties who provide  recordkeeping  and  administrative  services that
    would   otherwise  be  performed  by  an  affiliate  of  the  manager.   See
    "Management-Transfer and Administrative Services," page 15.

(3) Other  Expenses,  which  includes  the fees and  expenses  (including  legal
    counsel fees) of those trustees who are not "interested  persons" as defined
    in the  Investment  Company Act of 1940 (the  Investment  Company Act),  are
    expected  to be less  than  0.01 of 1% of the  average  net  assets  for the
    current fiscal year.
    

    The purpose of this table is to help you  understand  the various  costs and
expenses  that you,  as a  shareholder,  will bear  directly  or  indirectly  in
connection with an investment in the class of shares of the fund offered by this
Prospectus.  The example set forth above assumes  reinvestment  of all dividends
and  distributions  and uses a 5%  annual  rate of  return  as  required  by SEC
regulations.

    NEITHER  THE 5% RATE OF  RETURN  NOR THE  EXPENSES  SHOWN  ABOVE  SHOULD  BE
CONSIDERED  INDICATIONS OF PAST OR FUTURE  RETURNS AND EXPENSES.  ACTUAL RETURNS
AND EXPENSES MAY BE GREATER OR LESS THAN THOSE SHOWN.

   
    The shares offered by this  Prospectus are Investor Class shares and have no
up-front or deferred sales charges,  commissions, or 12b-1 fees. The fund offers
one other class of shares,  primarily  to  institutional  investors,  that has a
different  fee  structure  than the Investor  Class.  The  difference in the fee
structures between the classes is the result of their separate  arrangements for
shareholder  and  distribution  services and not the result of any difference in
amounts  charged  by  the  manager  for  core  investment   advisory   services.
Accordingly,  the core  investment  advisory  expenses  do not vary by class.  A
difference in fees will result in different performance for the other class. For
additional  information  about the other class, see "Further  Information  About
American Century," page 16.
    


4    TRANSACTION AND OPERATING EXPENSE TABLE   AMERICAN CENTURY INVESTMENTS


<TABLE>
<CAPTION>
   
                             FINANCIAL HIGHLIGHTS
                              PRIME MONEY MARKET

  The  Financial  Highlights  for the year ended  February 28,  1998,  have been
audited by Coopers & Lybrand,  L.L.P.,  independent  accountants,  whose  report
thereon appears in the fund's annual report,  which is incorporated by reference
into the Statement of Additional  Information.  The Financial Highlights for the
periods  ended on or  before  February  28,  1997,  have been  audited  by other
independent  accountants.  The annual  report  contains  additional  performance
information  and will be made  available  upon request and without  charge.  The
information  presented  is for a share  outstanding  throughout  the years ended
February 28, except as noted.

                                       1998           1997           1996(1)          1995           1994(2)

PER-SHARE DATA

Net Asset Value,
<S>                                    <C>            <C>            <C>             <C>              <C>  
Beginning of Period ...............    $1.00          $1.00          $1.00           $1.00            $1.00
                                     --------       --------       --------        --------         --------
Income from
Investment Operations

  Net Investment Income ...........    0.05           0.05            0.06            0.05            0.01
                                     --------       --------        --------       --------         --------
Distributions

  From Net
  Investment Income ...............   (0.05)         (0.05)          (0.06)          (0.05)          (0.01)
                                     --------       --------        --------        --------        --------
Net Asset Value,
End of Period .....................    $1.00          $1.00           $1.00           $1.00           $1.00
                                     ========       ========        ========        ========        ========
  TOTAL RETURN(3) .................    5.29%          5.04%           5.60%          4.93%            0.96%

RATIOS/SUPPLEMENTAL DATA

Ratio of Operating Expenses
to Average Net Assets .............    0.50%          0.50%           0.48%           0.04%             -

Ratio of Operating Expenses
to Average Net Assets
(Before Expense Waiver) ...........    0.63%          0.63%           0.62%           0.71%         1.49%(4)

Ratio of Net Investment Income
to Average Net Assets .............    5.17%          4.92%           5.43%           5.28%         3.35%(4)

Ratio of Net Investment Income
to Average Net Assets
(Before Expense Waiver) ...........    5.04%          4.79%           5.29%           4.61%         1.86%(4)

Net Assets, End of Period
(in thousands) .................... $1,417,311     $1,211,990      $1,270,653      $1,509,863        $75,168

(1) Year ended February 29, 1996.

(2) November 17, 1993 (inception) through February 28, 1994.

(3) Total return assumes  reinvestment  of dividends,  if any. Total returns for
    periods less than one year are not annualized.

(4) Annualized.
</TABLE>
    

PROSPECTUS                                       FINANCIAL HIGHLIGHTS     5


                        INFORMATION REGARDING THE FUND

INVESTMENT POLICIES OF THE FUND

    The fund has adopted certain  investment  restrictions that are set forth in
the  Statement of Additional  Information.  Those  restrictions,  as well as the
investment  objective of the fund identified on page 2 of this  Prospectus,  and
any other investment  policies designated as "fundamental" in this Prospectus or
in  the  Statement  of  Additional   Information,   cannot  be  changed  without
shareholder  approval.  The fund has implemented  additional investment policies
and  practices  to  guide  its  activities  in the  pursuit  of  its  investment
objective.  These policies and practices,  which are described  throughout  this
Prospectus,  are not  designated  as  fundamental  policies  and may be  changed
without shareholder approval.

   
    For an explanation of the  securities  ratings  referred to in the following
discussion,  see an explanation of fixed income securities  ratings under "Other
Information" in the Statement of Additional Information.
    

ELIGIBLE INVESTMENTS

    The fund  buys  high-quality  (first-tier),  U.S.  dollar-denominated  money
market instruments and other short-term obligations of banks,  governments,  and
corporations.  Some  of  the  fund's  possible  investments  are  listed  in the
following  table.  The  obligations  referenced  in  the  table  and  the  risks
associated  with  investing in them are  described  in the section  titled "Risk
Factors and Investment Techniques," which begins on page 7.

- --------------------------------------------------------------------------------
Issuers                                   Types of Obligations
- --------------------------------------------------------------------------------
Domestic and foreign financial            Negotiable certificates of
institutions (e.g., banks, broker-        deposit, bankers' acceptances,
dealers, insurance companies,             bank notes, and commercial
leasing and financing                     paper (including floating-rate
corporations)                             agency securities)
- --------------------------------------------------------------------------------
Domestic and foreign                      Commercial paper and short-
nonfinancial corporations                 term corporate debt obligations
                                          (including fixed- and
                                          variable-rate notes and
                                          bonds)
- --------------------------------------------------------------------------------

- --------------------------------------------------------------------------------
Issuers                                   Types of Obligations
- --------------------------------------------------------------------------------
U.S. government and its                   U.S. Treasury bills, notes,
agencies and instrumentalities            bonds, and U.S. government
                                          agency obligations (including
                                          floating-rate agency securities)
- --------------------------------------------------------------------------------
Foreign governments                       Commercial paper and
and their agencies and                    discount notes
instrumentalities
- --------------------------------------------------------------------------------

PORTFOLIO INVESTMENT QUALITY AND MATURITY CRITERIA

    The manager  follows  regulatory  guidelines on quality and maturity for the
fund's  investments,  which are  designed to help  maintain a stable $1.00 share
price. In particular, the fund:

  (1)    Buys only U.S. dollar-denominated obligations with remaining maturities
         of 13 months or less (and variable- and floating-rate  obligations with
         demand features that effectively  shorten their maturities to 13 months
         or less);

  (2)    Maintains a dollar-weighted average portfolio maturity of 90 days or
         less;

  (3)    Restricts its investments to high-quality obligations determined by the
         manager  to  present  minimal  credit  risks,  pursuant  to  guidelines
         established by the Board of Trustees.

    To be considered high-quality, an obligation must be one of the following:

  (1)    A U.S. government obligation;

  (2)    Rated  (or  issued  by an  issuer  rated  with  respect  to a class  of
         short-term debt  obligations)  within the two highest rating categories
         for short-term debt  obligations by at least two nationally  recognized
         statistical rating organizations  (rating agencies) (or one if only one
         has rated the obligation);

  (3)    An unrated  obligation  judged by the manager,  pursuant to  guidelines
         established by the Board of Trustees, to be of comparable quality.

   
    The fund intends to buy only  obligations  that are designated as first-tier
securities as defined by the SEC; that is, securities with the highest rating.
    


6      INFORMATION REGARDING THE FUND         AMERICAN CENTURY INVESTMENTS


    The  acquisition of securities  that are unrated or rated by only one rating
agency must be approved or ratified by the Board of Trustees.

DIVERSIFICATION

    In order to reduce  investment  risks,  the  manager is  required  by law to
diversify the fund's  investment  portfolio.  As a general rule, the manager may
not invest more than 5% of the fund's  total  assets in  securities  issued by a
single  institution.  In addition,  the fund must also limit its  investments in
securities subject to puts of a single institution.

    This policy does not apply to U.S. government securities,  in which the fund
may invest without limitation. See the Statement of Additional Information for a
more detailed description.

INDUSTRY CONCENTRATION

    Under normal market  conditions,  25% or more of the fund's total assets are
invested in  obligations  of issuers in the financial  services  industry.  This
industry  concentration  reflects that of the markets in which the fund invests.
More than half of the  markets'  commercial  paper is  issued  by  companies  or
organizations in the financial services industry.

    For temporary defensive  purposes,  less than 25% of the fund's total assets
may be invested in  obligations of issuers in the financial  services  industry.
The  manager  will not invest  more than 25% of the fund's  total  assets in any
other industry.

RISK FACTORS AND INVESTMENT TECHNIQUES

    The fund may be  appropriate  for  investors  who seek to (1) earn income at
current money market rates while preserving their investments;  (2) use the fund
as part of a long-term, balanced investment portfolio consisting of money market
instruments,  bonds, and stocks;  or (3) use the fund to place investment monies
as part of a dollar-cost averaging investment program.

    Because the fund emphasizes  stability,  it will not generate as much income
as a bond fund. No single fund constitutes a balanced investment plan.

    Corporations  and  governments   address  their  short-term   borrowing  and
cash-flow management needs in a highly liquid, worldwide financial market called
the "money  market." The following is a brief  description of the types of money
market instruments the fund may buy.

CORPORATE OBLIGATIONS

    Commercial paper is issued by large  corporations to raise cash. The maximum
maturity for commercial  paper is 270 days,  although most  commercial  paper is
issued  with  maturities  of 60 days or less.  Commercial  paper is offered at a
discount with its full face value paid at maturity.

    Although  commercial  paper rates generally  fluctuate with the value of the
London Interbank Offered Rate (LIBOR), Treasury bills, bankers' acceptances, and
certificates  of deposit,  they are also influenced by (1) the issuer's size and
credit rating and (2) the commercial paper maturity date.

    Smaller or  lower-rated  corporations  may tap the  commercial  paper market
through asset-backed  commercial paper programs. In a typical program, a special
purpose  corporation  (a  SPC),  created  and/or  serviced  by a bank,  uses the
proceeds from an issuance of commercial  paper to purchase  receivables from one
or more corporations (sellers).  The sellers transfer their interest in the cash
flow from the  receivables to the SPC, and this cash is used to pay interest and
repay principal on the commercial  paper.  Letters of credit may be available to
cover the risk that the cash flow from the receivables will not be sufficient to
cover the maturing commercial paper.

    The fund may purchase corporate notes and bonds with remaining maturities of
13 months or less in the secondary market provided that each of these securities
has  characteristics  consistent with regulatory  requirements  for money market
funds.

BANK OBLIGATIONS

    Negotiable  certificates  of deposit (CDs)  evidence a bank's  obligation to
repay money  deposited  with it for a specified  period of time. The table below
identifies the types of CDs the fund may buy.

- --------------------------------------------------------------------------------
CD Type                                   Issuer
- --------------------------------------------------------------------------------
Domestic                                  Domestic offices of U.S. banks
- --------------------------------------------------------------------------------
Yankee                                    U.S. branches of foreign banks
- --------------------------------------------------------------------------------
Eurodollar                                Issued in London by U.S.,
                                          Canadian, European, and
                                          Japanese banks
- --------------------------------------------------------------------------------
Schedule B                                Canadian subsidiaries of
                                          non-Canadian banks
- --------------------------------------------------------------------------------


PROSPECTUS                           INFORMATION REGARDING THE FUND       7


    Bankers' acceptances are used to finance foreign commercial trade. Issued by
a bank with an importer's name on them, these  instruments allow the importer to
back up its own pledge to pay for  imported  goods with a bank's  obligation  to
cover the transaction if the importer fails to do so.

    Bank notes are senior unsecured promissory notes issued in the United States
by domestic commercial banks.

    The bank  obligations the fund may buy generally are not insured by the FDIC
or any other insurer.

GOVERNMENT OBLIGATIONS

    U.S.  Treasury  securities  differ from one another in their interest rates,
maturities,  and issuance and interest  payment  schedules.  Treasury bills have
initial  maturities of one year or less;  Treasury notes,  two to ten years; and
Treasury bonds, more than ten years.

    A number of U.S. government agencies and government-sponsored  organizations
issue debt  securities.  These  agencies  generally  are  created by Congress to
fulfill a specific  need,  such as providing  credit for home buyers or farmers.
Among these  agencies are the Federal  Home Loan Banks,  the Federal Farm Credit
System,  the Student Loan  Marketing  Association,  and the  Resolution  Funding
Corporation.

    Some  obligations  issued  or  guaranteed  by U.S.  government  agencies  or
instrumentalities  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
Treasury; others are supported by the U.S. government's  discretionary authority
to purchase certain obligations of the agency or instrumentality, and others are
supported only by the credit of the issuing agency or instrumentality.

    Supranational  organizations (generally,  multilateral lending institutions,
or MLIs) are  created by  governments  to promote  economic  reconstruction  and
development.  An MLI's  creditworthiness  is based not only on its own financial
performance, but on the willingness and ability of member governments to support
its lending activities.

    While maintaining  strict financial  controls to ensure liquidity and strong
creditworthiness,  MLIs finance their operations in the same manner as any other
financial  institution,   with  a  combination  of  short-  and  long-term  debt
obligations.  Short-term  debt is  usually  issued  in the  form  of  short-term
discount notes and commercial paper.

VARIABLE AND FLOATING-RATE INSTRUMENTS

    Variable-  and   floating-rate   instruments  are  issued  by  corporations,
financial institutions, and government agencies and instrumentalities.

    Floating-rate  instruments have interest rates that change whenever there is
a change in a designated base rate, whereas  variable-rate  instruments  provide
for specified periodic interest rate adjustments. The interest rate on variable-
and floating-rate  instruments is ordinarily determined by reference to (or is a
percentage of) an objective standard,  such as the Federal Funds effective rate,
the 90-day U.S. Treasury bill rate, or LIBOR.

    Although  the fund  typically  limits its  investments  to  securities  with
remaining  maturities  of 13 months or less,  it may  invest  in  variable-  and
floating-rate  instruments that have nominal (or stated) maturities in excess of
13 months,  provided that such  instruments (1) have demand features  consistent
with  regulatory  requirements  for money market  funds,  or (2) are  securities
issued by the U.S.  government  or a U.S.  government  agency that meet  certain
regulatory requirements for money market funds.

RULE 144A SECURITIES

    The fund may,  from time to time,  purchase Rule 144A  securities  when they
present  attractive  investment  opportunities  that  otherwise  meet the fund's
criteria for selection.  Rule 144A  securities are securities that are privately
placed with and traded among qualified  institutional  investors rather than the
general  public.  Although  Rule  144A  securities  are  considered  "restricted
securities," they are not necessarily illiquid.

   
    With respect to securities eligible for resale under Rule 144A, the staff of
the SEC has taken the  position  that the  liquidity of such  securities  in the
portfolio of a fund offering redeemable securities is a question of fact for the
Board  of  Trustees  to  determine,  such  determination  to  be  based  upon  a
consideration  of the readily  available  trading  markets and the review of any
contractual  restrictions.  The staff also  acknowledges  that,  while the Board
retains ultimate responsibility, it may delegate this function to the manager.
    


8    INFORMATION REGARDING THE FUND             AMERICAN CENTURY INVESTMENTS


Accordingly, the Board has established guidelines and procedures for determining
the liquidity of Rule 144A securities and has delegated the day-to-day  function
of determining the liquidity of Rule 144A  securities to the manager.  The Board
retains the  responsibility to monitor the  implementation of the guidelines and
procedures it has adopted.

    Since the  secondary  market  for such  securities  is  limited  to  certain
qualified  institutional  investors,  the  liquidity of such  securities  may be
limited accordingly and a fund may, from time to time, hold a Rule 144A security
that is illiquid. In such an event, the fund's manager will consider appropriate
remedies to minimize  the effect on such  fund's  liquidity.  No fund may invest
more than 10% of its assets in illiquid  securities  (securities that may not be
sold within seven days at  approximately  the price used in determining  the net
asset value of fund shares).

U.S. DOLLAR-DENOMINATED FOREIGN SECURITIES

    The fund invests exclusively in U.S. dollar-denominated instruments, some of
which may be issued by foreign  entities  as  described  in the table on page 6.
Consequently,  the fund may be subject to risks different than those incurred by
a fund that invests only in debt obligations of domestic issuers.

   
    Currently,  the only  securities held outside the United States in which the
fund expects to invest are EuroCDs,  which are held in England. As a result, the
fund's exposure to these foreign  investment  risks is expected to be lower than
funds that invest more broadly in  securities  held  outside the United  States.
Regulatory limits specified in the section titled "Portfolio  Investment Quality
and Maturity  Criteria"  on page 6 apply  equally to  securities  of foreign and
domestic issuers.
    

OTHER INVESTMENT PRACTICES, THEIR CHARACTERISTICS
AND RISKS

   
    For additional information,  see "Investment  Restrictions" in the Statement
of Additional Information.
    

REPURCHASE AGREEMENTS

    The  fund may  enter  into  repurchase  agreements,  collateralized  by U.S.
government  securities,  with banks or broker-dealers that are deemed to present
minimum credit risk. A repurchase  agreement involves the purchase of a security
and a simultaneous agreement to sell the security back to the seller at a higher
price.  At the direction of the Board of Trustees,  the manager has  established
procedures  to minimize  potential  losses due to credit risk.  Delays or losses
could result if the other party to the agreement defaults or becomes bankrupt.

WHEN-ISSUED SECURITIES

    The fund may  sometimes  purchase new issues of  securities on a when-issued
basis or forward  commitment  basis when,  in the opinion of the  manager,  such
purchases  will  further the  investment  objectives  of the fund.  The price of
when-issued  securities is established at the time the commitment to purchase is
made. Delivery of and payment for these securities typically occur 15 to 45 days
after the commitment to purchase. Market rates of interest on debt securities at
the time of  delivery  may be higher or lower than those  contracted  for on the
when-issued security.  Accordingly, the value of such security may decline prior
to delivery,  which could  result in a loss to the fund. A separate  account for
each fund consisting of cash or appropriate  liquid assets in an amount at least
equal to the when-issued commitments will be established and maintained with the
custodian. No income will accrue to the fund prior to delivery.

BORROWING

    The  fund may  borrow  money  only  for  temporary  or  emergency  purposes.
Borrowings are not expected to exceed 5% of the fund's total assets.

OTHER TECHNIQUES

    The manager  may buy other types of  securities  or employ  other  portfolio
management   techniques  on  behalf  of  a  fund  including  reverse  repurchase
agreements.  When SEC  guidelines  require  it to do so, the fund will set aside
cash or  appropriate  liquid assets in a segregated  account to cover the fund's
obligations.

PERFORMANCE ADVERTISING

   
    From time to time, the fund may advertise performance data. Fund performance
may be shown  by  presenting  one or more  performance  measurements,  including
cumulative  total return or average  annual total  return,  yield and  effective
yield.  Performance data may be quoted separately for the Investor Class and for
the other class.
    


PROSPECTUS                           INFORMATION REGARDING THE FUND      9


    Cumulative  total  return data is computed by  considering  all  elements of
return,  including  reinvestment  of dividends and capital gains  distributions,
over a stated  period of time.  Average  annual  total return is  determined  by
computing  the annual  compound  return over a stated  period of time that would
have  produced  the fund's  cumulative  total return over the same period if the
fund's performance had remained constant throughout.

    A  quotation  of yield  reflects  the  fund's  income  over a stated  period
expressed as a percentage  of its share price.  Yield is calculated by measuring
the income  generated by an investment in the fund over a seven-day  period (net
of fund expenses). This income is then annualized, that is, the amount of income
generated by the investment over the seven-day period is assumed to be generated
over each  similar  period  each week  throughout  a full year and is shown as a
percentage of the  investment.  The  effective  yield is calculated in a similar
manner but, when  annualized,  the income earned by the investment is assumed to
be  reinvested.  The  effective  yield will be  slightly  higher  than the yield
because of the compounding effect on the assumed reinvestment.

    Yields are calculated  according to accounting methods that are standardized
in  accordance  with SEC  rules  for all stock  and bond  funds.  Because  yield
accounting methods differ from the methods used for other accounting purposes, a
fund's yield may not equal the income paid on its shares or the income  reported
in the fund's financial statements.

   
    The fund also may include in advertisements data comparing  performance with
the performance of non-related  investment media,  published  editorial comments
and performance  rankings compiled by independent  organizations  such as Lipper
Analytical Services or IBC's Money Fund Report and publications that monitor the
performance of mutual funds.  Performance  information may be quoted numerically
or may be presented in a table, graph or other illustration.  In addition,  fund
performance  may  be  compared  to  well-known  indices  of  market  performance
including the IBC's Money Fund Average and Bank Rate Monitor National Index of 2
(1)/(2) year CD rates.  Fund  performance  also may be  compared,  on a relative
basis, to other funds in our fund family. This relative comparison, which may be
based upon historical fund  performance or historical or expected  volatility or
other fund  characteristics,  may be presented  numerically,  graphically  or in
text. Fund  performance  also may be combined or blended with other funds in our
fund family,  and that  combined or blended  performance  may be compared to the
same indices to which individual funds may be compared.
    

    All performance  information  advertised by the fund is historical in nature
and is not intended to represent or guarantee future results.  The value of fund
shares when redeemed may be more or less than their original cost.


10      INFORMATION REGARDING THE FUND         AMERICAN CENTURY INVESTMENTS


                HOW TO INVEST WITH AMERICAN CENTURY INVESTMENTS

    The  following  section  explains how to  purchase,  exchange and redeem the
Investor Class shares of the fund offered by this  Prospectus  through  American
Century Brokerage Access AccountsSM and Standard Account.

   
    To reduce  expenses and  demonstrate  respect for our  environment,  we have
initiated a project  through which we will  eliminate  duplicate  copies of most
financial  reports and  prospectuses  to most  households  and  deliver  account
statements to most households in a single envelope,  even if they have more than
one  account.  If you would like  additional  copies of  financial  reports  and
prospectuses or separate mailing of account statements, please call us.
    

HOW TO PURCHASE AND SELL AMERICAN CENTURY
FUNDS

    The fund offered by this Prospectus is available as an investment  option in
connection  with a  program,  product or service  offered  by  American  Century
Brokerage.  Since all records of your share ownership are maintained by American
Century  Brokerage,  all orders to purchase,  exchange and redeem shares must be
made through American Century Brokerage.

    You should contact a Brokerage  Associate at 1-888-345-2071  for information
about how to select American Century funds.

    If you have questions about a fund, see  "Investment  Policies of the Fund,"
page 6, or call one of our Investor Service Representatives at 1-800-345-2021.

    Orders to purchase shares are effective on the day we receive  payment.  See
"When Share Price Is Determined," page 12.

    We may  discontinue  offering shares  generally in the funds  (including any
class  of  shares  of a fund)  or in any  particular  state  without  notice  to
shareholders.

HOW TO EXCHANGE FROM ONE AMERICAN CENTURY
FUND TO ANOTHER

    Your  American  Century  Brokerage  account  permits  you to  exchange  your
investment  in the shares of a fund for shares of  another  fund in our  family.
Contact American Century Brokerage at 1-888-345-2071 for details on the rules in
your plan governing exchanges.

HOW TO REDEEM SHARES

    Subject to any restrictions  imposed by American Century Brokerage,  you can
sell  ("redeem") your shares at their net asset value through  American  Century
Brokerage.   American   Century   Brokerage  will  provide  us  with  redemption
instructions.  The shares will be redeemed at the net asset value next  computed
after  receipt of the  instructions  in good  order.  See "When  Share  Price Is
Determined," page 12. If you have any questions about how to redeem,  contact an
American Century Brokerage Associate.

TELEPHONE SERVICES

INVESTORS LINE

   
    To  request  information  about our funds and a current  prospectus,  or get
answers to any  questions  that you may have about the funds and the services we
offer, call one of our Investor Services Representatives at 1-800-345-2021.
    


PROSPECTUS          HOW TO INVEST WITH AMERICAN CENTURY INVESTMENTS       11


                    ADDITIONAL INFORMATION YOU SHOULD KNOW

SHARE PRICE

WHEN SHARE PRICE IS DETERMINED

    The price of your shares is also  referred to as their net asset value.  Net
asset value is determined  by  calculating  the total value of a fund's  assets,
deducting  total  liabilities  and  dividing  the result by the number of shares
outstanding.  For all American  Century  funds,  except funds issued by American
Century Target  Maturities  Trust, net asset value is determined as of the close
of regular trading on each day that the New York Stock Exchange is open, usually
3 p.m.  Central  time.  The net asset  values  for Target  Maturities  funds are
determined one hour prior to the close of the Exchange.

    Investments and requests to redeem or exchange shares will receive the share
price next  determined  after  receipt by us of the  investment,  redemption  or
exchange  request.  For example,  investments and requests to redeem or exchange
shares  received by us or one of our agents or  designees  before the time as of
which the net asset value of the fund is determined,  are effective on, and will
receive the price  determined,  that day.  Investment,  redemption  and exchange
requests received  thereafter are effective on, and receive the price determined
as of, the close of the Exchange on the next day the Exchange is open.

    Investments  are  considered  received  only when payment is received by us.
Wired funds are  considered  received on the day they are  deposited in our bank
account if they are deposited before the time as of which the net asset value of
the fund is determined.

    Investments by telephone pursuant to your prior  authorization to us to draw
on your bank account are considered received at the time of your telephone call.

    Investment and transaction  instructions  received by us on any business day
by mail  prior  to the  time as of  which  the net  asset  value  of the fund is
determined, will receive that day's price. Investments and instructions received
after that time will receive the price determined on the next business day.

   
    If you invest in fund shares through an  employer-sponsored  retirement plan
or  other  financial  intermediary,  it  is  the  responsibility  of  your  plan
recordkeeper or financial  intermediary to transmit your purchase,  exchange and
redemption requests to the fund's transfer agent prior to the applicable cut-off
time for receiving  orders and to make payment for any purchase  transactions in
accordance with the fund's  procedures or any contractual  arrangements with the
fund or the fund's distributor in order for you to receive that day's price.

    We have contractual  relationships with certain financial  intermediaries in
which such intermediaries  represent that they have systems to track the time at
which  investment  orders are  received  and to  segregate  orders  received  at
different times.  Based on these  representations,  the fund has authorized such
intermediaries  and their designees to accept purchase and redemption  orders on
the fund's behalf up to the applicable  cut-off time. The fund will be deemed to
have received such orders upon acceptance by the duly  authorized  intermediary,
and such  orders  will be priced at the fund's net asset  value next  determined
after acceptance on the fund's behalf by such intermediary.
    

HOW SHARE PRICE IS DETERMINED

    The valuation of assets for determining net asset value may be summarized as
follows:

    The portfolio  securities of the fund, except as otherwise noted,  listed or
traded on a domestic  securities  exchange  are valued at the last sale price on
that  exchange.  Portfolio  securities  primarily  traded on foreign  securities
exchanges  generally  are  valued  at  the  preceding  closing  values  of  such
securities on the exchange where primarily traded. If no sale is reported, or if
local convention or regulation so provides, the mean of the latest bid and asked
prices is used.  Depending on local convention or regulation,  securities traded
over-the-counter  are priced at the mean of the latest bid and asked prices,  or
at the last sale  price.  When  market  quotations  are not  readily  available,
securities and other assets are valued at fair value as determined in accordance
with procedures adopted by the Board of Trustees.


12   ADDITIONAL INFORMATION YOU SHOULD KNOW    AMERICAN CENTURY INVESTMENTS


    Debt  securities  not traded on a principal  securities  exchange are valued
through  valuations  obtained from a commercial  pricing  service or at the most
recent  mean of the bid and asked  prices  provided  by  investment  dealers  in
accordance with procedures established by the Board of Trustees.

    Pursuant to a  determination  by the fund's  Board of Trustees and Rule 2a-7
under the Investment Company Act of 1940,  portfolio  securities of the fund are
valued at amortized  cost.  When a security is valued at amortized  cost,  it is
valued at its cost  when  purchased,  and  thereafter  by  assuming  a  constant
amortization to maturity of any discount or premium, regardless of the impact of
fluctuating interest rates on the market value of the instrument.

WHERE TO FIND YIELD INFORMATION

    The yield of the Investor  Class of the fund is published  weekly in leading
financial publications and daily in many local newspapers. Yield information may
also  be   obtained   by   calling   us  or  by   accessing   our  Web  site  at
www.americancentury.com.

DISTRIBUTIONS

    At the  close  of each  day,  including  Saturdays,  Sundays  and  holidays,
dividends are declared and credited (i.e.,  available for redemption)  daily and
distributed monthly on the last Friday of each month.

    You will  begin to  participate  in the  distributions  the day  after  your
purchase is effective.  See "When Share Price Is  Determined" on page 12. If you
redeem  shares,  you will receive the  distribution  declared for the day of the
redemption.  If all  shares  are  redeemed  (other  than by  CheckWriting),  the
distribution  on the  redeemed  shares  will be  included  with your  redemption
proceeds.

    The fund  does not  expect to  realize  any  long-term  capital  gains  and,
accordingly, does not expect to make any capital gains distributions.

   
    Participants in employer-sponsored retirement or savings plans must reinvest
all  distributions.   For  shareholders   investing  through  taxable  accounts,
distributions  will be  reinvested  unless  you elect to  receive  them in cash.
Distributions of less than $10 generally will be reinvested.  Distributions made
shortly  after a  purchase  by check  or ACH may be held up to 15 days.  You may
elect to have distributions on shares held in certain IRAs and 403(b) plans paid
in cash only if you are at least 59 (1)/(2) years old or permanently and totally
disabled.  Distribution  checks  normally are mailed within seven days after the
record date. Please consult our Investor Services Guide for further  information
regarding your distribution options.
    

TAXES

    The fund has elected to be taxed under  Subchapter M of the Internal Revenue
Code,  which means that to the extent its income is distributed to shareholders,
it pays no income tax.

TAX-DEFERRED ACCOUNTS

    If fund  shares  are  purchased  through  tax-deferred  accounts,  such as a
qualified  employer-sponsored  retirement  or savings  plan,  income and capital
gains  distributions  paid by the fund will  generally not be subject to current
taxation,  but will  accumulate in your account under the plan on a tax-deferred
basis.

    Employer-sponsored  retirement and savings plans are governed by complex tax
rules.  If you elect to participate in your employer's  plan,  consult your plan
administrator,  your plan's  summary plan  description,  or a  professional  tax
advisor   regarding  the  tax   consequences  of   participation  in  the  plan,
contributions to, and withdrawals or distributions from the plan.

TAXABLE ACCOUNTS

    If fund shares are purchased through taxable accounts,  distributions of net
investment  income  and net  short-term  capital  gains  are  taxable  to you as
ordinary  income,  except as described  below. The dividends from net income may
qualify for the 70% dividends  received deduction for corporations to the extent
that the  fund  held  shares  receiving  the  dividend  for  more  than 45 days.
Distributions  from gains on assets  held longer than 12 months but no more than
18 months  (28% rate gain)  and/or  assets  held longer than 18 months (20% rate
gain) are taxable as long-term  gains  regardless of the length of time you have
held the shares.  However,  you should note that any loss realized upon the sale
or  redemption  of  shares  held for six  months or less  will be  treated  as a
long-term  capital loss to the extent of any  distribution of long-term  capital
gain (28% or 20% rate gain) to you with respect to such shares.


PROSPECTUS                   ADDITIONAL INFORMATION YOU SHOULD KNOW       13


    Distributions  are taxable to you  regardless  of whether  they are taken in
cash or reinvested,  even if the value of your shares is below your cost. If you
purchase shares shortly before a distribution,  you must pay income taxes on the
distribution,  even though the value of your investment (plus cash received,  if
any) will not have  increased.  In  addition,  the  share  price at the time you
purchase  shares may  include  unrealized  gains in the  securities  held in the
investment portfolio of the fund. If these portfolio securities are subsequently
sold and the gains are realized,  they will, to the extent not offset by capital
losses, be paid to you as a distribution of capital gains and will be taxable to
you as short-term or long-term capital gains (28% and/or 20% rate gain).

    In January of the year  following the  distribution,  if you own shares in a
taxable account, you will receive a Form 1099-DIV notifying you of the status of
your distributions for federal income tax purposes.

    Distributions also may be subject to state and local taxes, even if all or a
substantial  part  of such  distributions  are  derived  from  interest  on U.S.
government  obligations  which,  if you received them directly,  would be exempt
from state income tax. However, most but not all states allow this tax exemption
to pass  through  to fund  shareholders  when a fund pays  distributions  to its
shareholders.  You should  consult your tax advisor about the tax status of such
distributions in your own state.

    If you have not complied  with certain  provisions  of the Internal  Revenue
Code and  Regulations,  we are  required by federal law to withhold and remit to
the IRS 31% of reportable  payments (which may include dividends,  capital gains
distributions  and redemptions).  Those regulations  require you to certify that
the Social Security number or tax  identification  number you provide is correct
and that you are not subject to 31% withholding for previous  under-reporting to
the  IRS.  You  will be asked  to make  the  appropriate  certification  on your
application.  Payments  reported by us that omit your Social  Security number or
tax  identification  number will  subject us to a penalty of $50,  which will be
charged  against  your account if you fail to provide the  certification  by the
time the report is filed. This charge is not refundable.

   
    In addition to the federal income tax consequences  described above relating
to an  investment  in a fund,  there  may be other  federal,  state or local tax
considerations  that depend upon the circumstances of each particular  investor.
Prospective  shareholders are therefore urged to consult their tax advisors with
respect to the effect of this investment on their own specific situations.
    

MANAGEMENT

INVESTMENT MANAGEMENT

   
    The fund is the sole series of the American  Century  Investment  Trust (the
Trust).  Under  the laws of the  Commonwealth  of  Massachusetts,  the  Board of
Trustees is  responsible  for  managing  the  business and affairs of the Trust.
Acting  pursuant to an  investment  management  agreement  entered into with the
fund,  American  Century  Investment  Management,  Inc. serves as the investment
manager of the fund. Its principal place of business is American  Century Tower,
4500 Main Street,  Kansas City,  Missouri 64111.  The manager has been providing
investment advisory services to investment  companies and institutional  clients
since it was founded in 1958.
    

    The manager supervises and manages the investment  portfolio of the fund and
directs the purchase and sale of its investment  securities.  It utilizes a team
of portfolio managers, assistant portfolio managers and analysts acting together
to manage the assets of the fund. The team meets  regularly to review  portfolio
holdings and to discuss purchase and sale activity. The team adjusts holdings in
the fund's portfolio as it deems appropriate in pursuit of the fund's investment
objective.  Individual  portfolio  manager  members of the team may also  adjust
portfolio holdings of the fund as necessary between team meetings.

   
    The portfolio  manager  members of the team  managing the fund  described in
this  Prospectus  and  their  work  experience  for the last  five  years are as
follows:

    DENISE TABACCO, Portfolio Manager, joined American Century in 1988, becoming
a member of its  portfolio  department  in 1991. In 1995 she assumed her current
position as a Portfolio Manager.

    JOHN F. WALSH,  Portfolio Manager,  joined American Century in February 1996
as an Investment Analyst, a position he held until May 1997. At that time he was
promoted to Portfolio  Manager.  Prior to joining  American  Century,  Mr. Walsh
served as an Assistant
    


14   ADDITIONAL INFORMATION YOU SHOULD KNOW    AMERICAN CENTURY INVESTMENTS


   
Vice President and Analyst at First  Interstate  Bank, Los Angeles,  California,
from July 1993 to  January  1996.  Prior to that he served as an  Analyst at The
Long-Term Credit Bank of Japan, Los Angeles, California.
    

   
    The  activities  of the manager are subject only to directions of the fund's
Board of  Trustees.  The  manager  pays  all the  expenses  of the  fund  except
brokerage,  taxes,  interest,  fees and  expenses of the  non-interested  person
trustees (including counsel fees) and extraordinary expenses.
    

    For the services  provided to the fund,  the manager  receives a monthly fee
based on a percentage of the average net assets of the fund.  The annual rate at
which this fee is assessed is determined monthly in a two-step process: First, a
fee rate  schedule  is  applied  to the  assets  of all of the funds in a fund's
investment  category which are managed by the manager (the  Investment  Category
Fee). The three  investment  categories are: Money Market Funds,  Bond Funds and
Equity Funds.  Second,  a separate fee rate schedule is applied to the assets of
all of the funds  managed by the  manager  (the  Complex  Fee).  The  Investment
Category  Fee and the  Complex  Fee are then  added  to  determine  the  unified
management  fee payable by the fund to the manager.  Currently,  the  Investment
Category  Fee for the fund is an annual  rate of 0.30% of the average net assets
of the fund.  The Complex Fee for the Advisor  Class is currently an annual rate
of 0.30% of the average net assets of the fund.  Further  information  about the
calculation  of the annual  management  fee is  contained  in the  Statement  of
Additional Information.

    On the first  business day of each month,  the fund pays a management fee to
the  manager  for the  previous  month at the  specified  rate.  The fee for the
previous month is calculated by  multiplying  the applicable fee for the fund by
the  aggregate  average  daily closing value of the fund's net assets during the
previous  month,  and  further  multiplying  that  product  by a  fraction,  the
numerator  of  which  is the  number  of  days  in the  previous  month  and the
denominator of which is 365 (366 in leap years).

CODE OF ETHICS

    The fund and the  manager  have  adopted  a Code of  Ethics  that  restricts
personal  investing  practices by  employees of the manager and its  affiliates.
Among other  provisions,  the Code of Ethics requires that employees with access
to information about the purchase or sale of securities in the fund's portfolios
obtain  preclearance before executing personal trades. With respect to Portfolio
Managers  and  other  investment   personnel,   the  Code  of  Ethics  prohibits
acquisition  of securities  in an initial  public  offering,  as well as profits
derived from the purchase and sale of the same security within 60 calendar days.
These provisions are designed to ensure that the interests of fund  shareholders
come before the interests of the people who manage those funds.

TRANSFER AND ADMINISTRATIVE SERVICES

    American Century  Services  Corporation,  American Century Tower,  4500 Main
Street,  Kansas City, Missouri 64111, acts as transfer agent and dividend-paying
agent for the fund. It provides facilities, equipment and personnel to the fund,
and is paid for such services by the manager.

    Although there is no sales charge levied by the fund, transactions in shares
of the fund may be  executed  by brokers  or  investment  advisors  who charge a
transaction-based  fee or other fee for their  services.  Such  charges may vary
among  broker-dealers and financial advisors,  but in all cases will be retained
by the  broker-dealer  or financial  advisor and not remitted to the fund or the
manager.  You  should be aware of the fact that these  transactions  may be made
directly with American Century without incurring such fees.

    From time to time,  special  services  may be  offered to  shareholders  who
maintain  higher  share  balances  in our family of funds.  These  services  may
include the waiver of minimum investment requirements, expedited confirmation of
shareholder  transactions,  newsletters and a team of personal  representatives.
Any expenses  associated with these special services will be paid by the manager
or its affiliates.

    The manager and the transfer agent are both wholly owned by American Century
Companies,  Inc. (ACC). James E. Stowers Jr., Chairman of the Board of Directors
of ACC,  controls  ACC by virtue of his  ownership  of a majority  of its common
stock.

   
    Pursuant  to  a  Sub-Administration   Agreement  with  the  manager,   Funds
Distributor Inc. (FDI) serves as
    


PROSPECTUS                   ADDITIONAL INFORMATION YOU SHOULD KNOW     15


   
the  co-administrator for the fund. FDI is responsible for (i) providing certain
officers  of the  fund  and  (ii)  reviewing  and  filing  marketing  and  sales
literature  on behalf of the fund.  The fees and expenses of FDI are paid by the
manager.

YEAR 2000 ISSUES

    Many of the world's computer systems currently cannot properly  recognize or
process  date-sensitive  information  relating to the Year 2000 and beyond.  The
fund and the  manager  depend  upon the  computer  systems  of  various  service
providers,  including  the  transfer  agent,  for their  day-to-day  operations.
Inadequate  remediation of the Year 2000 problem by these service  providers and
others  with whom they  interact  could  have an  adverse  effect on the  fund's
operations,  including  pricing,  securities  trading  and  settlement,  and the
provision of shareholder services.

    The transfer agent, in cooperation with the manager, has assembled a team of
information  technology  professionals who are taking steps to address Year 2000
issues with respect to its own computers and to obtain  satisfactory  assurances
that  comparable  steps are being  taken by the fund's and the  manager's  other
major service  providers  and vendors.  The key phases of the  remediation  plan
include: an inventory of all internal systems,  vendor products and services and
data providers  (substantially  completed in 1997); an assessment of all systems
for date reliance and the impact of the century rollover on each  (substantially
completed  with respect to critical  systems in early 1998);  and the renovation
and  testing of  affected  systems  (targeted  for  completion  with  respect to
critical  systems by the end of 1998).  The manager will pay for the remediation
effort with revenues from its management fee, so that the fund will not directly
bear any of the cost.

    In light of these  remediation  efforts,  the  fund  does not  anticipate  a
material  adverse  impact on its  business,  operations  or financial  condition
relating  to Year  2000  issues.  However,  there can be no  assurance  that the
remediation  plan will be sufficient and timely or that  interaction  with other
noncomplying  computer  systems will not have a material  adverse  effect on the
fund's business, operations or financial condition.

    In addition, companies in which the fund invests may have Year 2000 computer
problems.  The value of their  securities could go down if they do not fix their
problems  in  time  or if  fixing  them  is very  expensive.  Before  making  an
investment  decision  about a company,  the manager  asks it about its Year 2000
readiness.  However, the manager cannot be sure that the information it receives
is complete and accurate,  and there is no guarantee that  portfolio  companies'
Year 2000 problems will not hurt the fund's performance.
    

DISTRIBUTION OF FUND SHARES

   
    The fund's shares are distributed by FDI, a registered broker-dealer. FDI is
a wholly-owned  indirect  subsidiary of Boston  Institutional  Group, Inc. FDI's
principal business address is 60 State Street, Suite 1300, Boston, Massachusetts
02109.  The Investor Class of shares does not pay any commissions or sales loads
to the distributor or to any other broker-dealers or financial intermediaries in
connection with the distribution of fund shares.

    Investors  may  open  accounts  with  American   Century  only  through  the
distributor.  All purchase  transactions  in the fund offered by this Prospectus
are  processed  by the  transfer  agent,  which  is  authorized  to  accept  any
instructions relating to fund accounts.  All purchase orders must be accepted by
the  distributor.  All fees and expenses of FDI in acting as distributor for the
fund are paid by the manager.
    

FURTHER INFORMATION ABOUT AMERICAN CENTURY

    The Trust is an open-end  management  investment  company.  Its business and
affairs  are  managed  by its  officers  under  the  direction  of its  Board of
Trustees.

    The  principal  office  of the fund is  American  Century  Tower,  4500 Main
Street, P.O. Box 419200, Kansas City, Missouri 64141-6200.  All inquiries may be
made by mail to that address,  or by telephone to 1-800-345-2021  (international
calls: 816-531-5575).

    The fund is the sole series of the Trust,  which  issues  shares with no par
value. Additional series of the Trust may be created in the future. In the event
that such other  series are  created,  the assets  belonging  to each  series of
shares will be held  separately  by the custodian and in effect each series will
be a separate fund.

   
    American Century offers two classes of the fund offered by this Prospectus:
an Investor Class and an Advisor Class. The shares offered by this Prospectus
    


16    ADDITIONAL INFORMATION YOU SHOULD KNOW   AMERICAN CENTURY INVESTMENTS


   
are Investor Class shares and have no up-front charges, commissions, or
12b-1 fees.
    

   
    The other class of shares is primarily offered to institutional investors or
through  institutional   distribution   channels,   such  as  employer-sponsored
retirement plans or through banks, broker-dealers,  insurance companies or other
financial  intermediaries.  The other class has different fees, expenses, and/or
minimum  investment  requirements than the Investor Class. The difference in the
fee structures between the classes is the result of their separate  arrangements
for shareholder and  distribution  services and not the result of any difference
in  amounts  charged  by the  manager  for core  investment  advisory  services.
Accordingly,  the  core  investment  advisory  expenses  do not  vary by  class.
Different fees and expenses will affect performance.  For additional information
concerning the other class of shares not offered by this Prospectus,  call us at
1-800-345-3533 or contact a sales  representative or financial  intermediary who
offers this class of shares.

    Except as described  below,  all classes of shares of a fund have  identical
voting,  dividend,   liquidation  and  other  rights,  preferences,   terms  and
conditions.  The only differences  between the classes are (a) each class may be
subject to  different  expenses  specific  to that  class,  (b) each class has a
different  identifying  designation or name, (c) each class has exclusive voting
rights with respect to matters  solely  affecting  such class and (d) each class
may have different exchange privileges.

    Each  share,  irrespective  of series or class,  is entitled to one vote for
each dollar of net asset value applicable to such share on all questions, except
for those  matters  that must be voted on  separately  by the series or class of
shares affected.  Matters affecting only one series or class are voted upon only
by that series or class.
    

    Shares have  non-cumulative  voting rights,  which means that the holders of
more than 50% of the votes cast in an election of trustees  can elect all of the
trustees if they choose to do so, and in such event the holders of the remaining
votes will not be able to elect any person or persons to the Board of Trustees.

    Unless required by the Investment  Company Act, it will not be necessary for
the Trust to hold annual meetings of shareholders. As a result, shareholders may
not vote each year on the election of trustees or the  appointment  of auditors.
However,  pursuant to the Trust's by-laws, the holders of shares representing at
least  10% of the  votes  entitled  to be cast may  request  the Trust to hold a
special meeting of shareholders.  We will assist in the communication with other
shareholders.

   
    WE RESERVE THE RIGHT TO CHANGE ANY OF OUR POLICIES, PRACTICES AND PROCEDURES
DESCRIBED IN THIS PROSPECTUS, INCLUDING THE STATEMENT OF ADDITIONAL INFORMATION,
WITHOUT  SHAREHOLDER  APPROVAL  EXCEPT  IN  THOSE  INSTANCES  WHERE  SHAREHOLDER
APPROVAL IS EXPRESSLY REQUIRED.
    


PROSPECTUS                   ADDITIONAL INFORMATION YOU SHOULD KNOW       17


TO CONTACT AMERICAN CENTURY BROKERAGE, INC.:

P.O. BOX 419146
KANSAS CITY, MISSOURI
64141-6146

BROKERAGE ASSOCIATE:
1-888-345-2071

TELESELECT AUTOMATED INFORMATION AND TRADING LINE:
1-888-345-2091

www.americancentury.com


   
TO CONTACT THE FUND:
    

P.O. BOX 419200
KANSAS CITY, MISSOURI
64141-6200

INVESTOR SERVICES:
1-800-345-2021 OR 816-531-5575

AUTOMATED INFORMATION LINE:
1-800-345-8765

TELECOMMUNICATIONS DEVICE FOR THE DEAF:
1-800-634-4113 OR 816-444-3485

   
FAX: 816-340-7962
    

www.americancentury.com

                        [american century logo(reg. sm)]
                                    American
                                Century(reg.tm)
                                   Brokerage
9806           [recycled logo]
BK-BKT-12450      Recycled
<PAGE>
                       STATEMENT OF ADDITIONAL INFORMATION

   
                        [american century logo(reg. sm)]
                                    American
                                Century(reg.tm)

                                  JUNE 1, 1998
    

                                     BENHAM
                                  GROUP(reg.tm)

                               Prime Money Market


                       STATEMENT OF ADDITIONAL INFORMATION

   
                                  JUNE 1, 1998
    

                        AMERICAN CENTURY INVESTMENT TRUST

This Statement is not a prospectus  but should be read in  conjunction  with the
fund's current Prospectus,  dated June 1, 1998. The fund's annual report for the
fiscal year ended February 28, 1998, is incorporated herein by reference. Please
retain  this  document  for future  reference.  To obtain the  Prospectus,  call
American Century Investments  toll-free at 1-800-345-2021  (international calls:
816-531-5575), or write P.O. Box 419200, Kansas City, Missouri 64141-6200.

                               TABLE OF CONTENTS

   
Investment Policies and Techniques ........................................    2
Investment Restrictions ...................................................    6
Portfolio Transactions ....................................................    7
Valuation of Portfolio Securities .........................................    7
Performance Advertising ...................................................    8
Taxes .....................................................................    9
About the Trust ...........................................................    9
Custodians ................................................................   10
Independent Accountants ...................................................   10
Multiple Class Structure ..................................................   10
Trustees and Officers .....................................................   12
Management ................................................................   14
Distribution of Fund Shares ...............................................   16
Additional Purchase and Redemption Information ............................   17
Other Information .........................................................   17
Financial Statements ......................................................   19
    


STATEMENT OF ADDITIONAL INFORMATION                                          1


INVESTMENT POLICIES AND TECHNIQUES

    The  following  paragraphs  provide  a  more  detailed  description  of  the
securities  and  investment  practices  identified  in  the  Prospectus.  Unless
otherwise  noted,  the  policies  described  in  this  Statement  of  Additional
Information are not fundamental and may be changed by the Board of Trustees.

COMMERCIAL PAPER

    Commercial  paper  (CP) is  issued by  utility,  financial,  and  industrial
companies and supranational  organizations.  Nationally  recognized  statistical
rating  organizations  (rating agencies) assign ratings to CP issuers indicating
the agencies' assessment of credit risk. Investment grade CP ratings assigned by
four rating agencies are provided in the following table.

                      Moody's       Standard                         Fitch
                     Investors      & Poor's         Duff &        Investors
                   Service, Inc.   Corporation    Phelps, Inc.   Service, Inc.
- --------------------------------------------------------------------------------
Highest Ratings       Prime-1       A-1/A-1+        D-1/D-1+       F-1/F-1+
                      Prime-2          A-2             D-2            F-2
                      Prime-3          A-3             D-3            F-3
- --------------------------------------------------------------------------------

    If an obligation  has been  assigned  different  ratings by multiple  rating
agencies,  at least two rating  agencies must have assigned their highest rating
as indicated  above in order for the manager to determine that the obligation is
eligible  for  purchase  by the fund or,  if  unrated,  the  obligation  must be
determined to be of comparable quality by the manager.

    Some examples of CP and CP issuers are provided in the following paragraphs.

    Domestic  CP is issued by U.S.  industrial  and finance  companies,  utility
companies, thrifts, and bank holding companies. Foreign CP is issued by non-U.S.
industrial  and finance  companies  and  financial  institutions.  Domestic  and
foreign  corporate  issuers  occasionally  have  the  underlying  support  of  a
well-known,  highly rated commercial bank or insurance company.  Bank support is
provided  in the form of a letter  of credit  (a LOC) or  irrevocable  revolving
credit  commitment  (an IRC).  Insurance  support is  provided  in the form of a
surety bond.

   
    Bank  holding  company  CP is  issued  by  the  holding  companies  of  many
well-known   domestic  banks,   including   Citicorp,   J.P.  Morgan  &  Company
Incorporated,  and First Union  National  Bank.  Bank holding  company CP may be
issued by the parent of a money center or regional bank.
    

    Thrift CP is issued by major  federal or  state-chartered  savings  and loan
associations and savings banks.

    Schedule  B Bank CP is  short-term,  U.S.  dollar-denominated  CP  issued by
Canadian  subsidiaries of non-Canadian banks (Schedule B banks).  Whether issued
as  commercial  paper,  a certificate  of deposit,  or a promissory  note,  each
instrument  issued by a  Schedule B bank ranks  equally  with any other  deposit
obligation.  Paper  issued by Schedule B banks  provides  an  investor  with the
comfort  and  reduced  risk of a direct and  unconditional  parental  guarantee.
Schedule  B  instruments  generally  offer  higher  rates  than  the  short-term
instruments of the parent bank or holding company.

REPURCHASE AGREEMENTS

    In a repurchase  agreement  (a repo),  the fund buys a security at one price
and simultaneously  agrees to sell it back to the seller at an agreed upon price
on a specified date (usually  within seven days from the date of purchase) or on
demand.  The  repurchase  price  exceeds  the  purchase  price by an amount that
reflects an  agreed-upon  rate of return and that is  unrelated  to the interest
rate on the  underlying  security.  Delays or losses  could  result if the other
party to the agreement defaults or becomes bankrupt.

   
    American  Century  Investment  Management,  Inc. (the  manager)  attempts to
minimize the risks associated with repurchase  agreements by adhering to written
guidelines that govern repurchase  agreements.  These guidelines strictly govern
(i) the type of  securities  that may be  acquired  and  held  under  repurchase
agreements;   (ii)  collateral   requirements   for  sellers  under   repurchase
agreements;  (iii) the amount of the fund's net assets that may be  committed to
repurchase  agreements  that mature in more than seven days; and (iv) the manner
in which  the fund  must take  delivery  of  securities  subject  to  repurchase
agreements. Moreover, the Board of Trustees reviews and approves, on a quarterly
basis, the creditworthiness of brokers, dealers and banks with whom the fund may
enter into repurchase agreements. The fund may enter into a repurchase agreement
only with an entity that appears on a list
    


2                                                  AMERICAN CENTURY INVESTMENTS


   
of those that have been approved by the Board as  sufficiently creditworthy.
    

    The fund has received permission from the Securities and Exchange Commission
(SEC) to  participate  in joint  repurchase  agreements  collateralized  by U.S.
government  securities  with other  mutual  funds  advised by the manager or its
affiliates.  Joint repos are  expected to increase  the income the fund can earn
from repo  transactions  without  increasing  the risks  associated  with  these
transactions.

   
    Under the  Investment  Company  Act of 1940 (the  Investment  Company  Act),
repurchase agreements are considered to be loans.
    

REVERSE REPURCHASE AGREEMENTS

    In a reverse  repurchase  agreement,  the fund  transfers  possession of (or
sells) securities to another party,  such as a bank or  broker-dealer,  for cash
and agrees to later repay cash plus interest for the return (or  repurchase)  of
the  same  securities.  To  collateralize  the  transaction,  the  value  of the
securities  transferred  is  slightly  greater  than the amount of cash the fund
receives in exchange for the securities.

   
    If  the  purchaser  reneged  on the  agreement  and  failed  to  return  the
securities,  the fund might suffer a loss. The fund's loss could be even greater
if the market value of the securities  transferred increased in the meantime. To
protect  against  these  risks,  the fund will  enter  into  reverse  repurchase
agreements  only  with  parties  whose  creditworthiness  is  determined  to  be
satisfactory  by  the  manager.   While  a  reverse   repurchase   agreement  is
outstanding,  the fund  will  segregate  appropriate  securities  to  cover  its
obligation under the agreement.
    

TAXABLE MUNICIPAL OBLIGATIONS

    Taxable municipal obligations are state and local obligations whose interest
payments   are  subject  to  federal   income  tax  because  of  the  degree  of
non-government  involvement  in the  transaction  or  because  federal  tax code
limitations on the issuance of tax-exempt  bonds that benefit  private  entities
have been  exceeded.  Some  typical  examples of taxable  municipal  obligations
include industrial revenue bonds and economic  development bonds issued by state
or local  governments  to aid  private  enterprise.  The  interest  on a taxable
municipal  bond is often exempt from state  taxation in the issuing  state.  The
fund may purchase taxable municipal  obligations  although it does not currently
intend to do so.

TIME DEPOSITS

    Time deposits are  non-negotiable  bank deposits  maintained for up to seven
days at a stated  interest rate.  These  instruments may be withdrawn on demand,
although early withdrawals may be subject to penalties.

WHEN-ISSUED SECURITIES, FORWARD COMMITMENT AGREEMENTS AND ROLL TRANSACTIONS

    The fund may engage in securities  transactions  on a when-issued or forward
commitment basis, in which the transaction price and yield are each fixed at the
time the  commitment  is made,  but payment and delivery  occur at a future date
(typically 1 to 7 days later).

    When purchasing securities on a when-issued or forward commitment basis, the
fund assumes the rights and risks of ownership,  including the risk of price and
yield fluctuations.  Although the fund will make commitments to purchase or sell
securities with the intention of actually  receiving or delivering  them, it may
sell the securities  before the settlement date if doing so is deemed  advisable
as a matter of investment strategy.

   
    In purchasing  securities on a when-issued or forward  commitment basis, the
fund will segregate until the settlement date appropriate  securities consistent
with SEC regulations. When the time comes to pay for the when-issued securities,
the fund will meet its  obligations  with  available  cash,  through the sale of
securities,  or,  although it would not normally expect to do so, by selling the
when-issued securities themselves (which may have a market value greater or less
than the fund's payment  obligation).  Selling securities to meet when-issued or
forward commitment obligations may generate taxable capital gains or losses.
    

    The fund may sell a  security  and at the same  time  make a  commitment  to
purchase the same or a comparable security at a future date and specified price.
Conversely,  the fund may  purchase  a  security  and at the  same  time  make a
commitment  to sell  the same or a  comparable  security  at a  future  date and
specified price. These types of transactions are executed simultaneously in what
are known as  "dollar-rolls",  "cash and carry" or financing  transactions.  For
example, a


STATEMENT OF ADDITIONAL INFORMATION                                        3


broker-dealer may seek to purchase a particular security that the fund owns. The
fund will sell that security to the broker-dealer and simultaneously  enter into
a forward  commitment  agreement to buy it back at a future  date.  This type of
transaction  generates  income  for the fund if the dealer is willing to execute
the transaction at a favorable price in order to acquire a specific security.

    There is a risk that the  party  with  whom the fund  enters  into a forward
commitment agreement will not uphold its commitment,  which could cause the fund
to miss a favorable price or yield opportunity or to suffer a loss.

INTEREST RATE RESETS ON VARIABLE- AND  FLOATING-RATE INSTRUMENTS

   
    The interest rate on variable- and  floating-rate  instruments is ordinarily
determined by reference to (or is a percentage of) an objective standard.  There
are  two  types  of  indices   that   provide  the  basis  for   interest   rate
adjustments--those based on market rates and those based on a calculated measure
such as a  cost-of-funds  index.  Commonly used indices  include the three-month
Treasury bill rate, the Federal Funds  effective  rate (the Fed Funds rate),  or
the one-month or  three-month  London  Interbank  Offered Rate (LIBOR),  each of
which is highly correlated with changes in market interest rates.
    

    Three-month  Treasury bill rates are calculated by the Federal  Reserve Bank
of New York based on weekly auction averages.

    LIBOR is the rate at which  banks in  London  offer  Eurodollars  in  trades
between  banks.  LIBOR has become a key rate in the U.S.  domestic  money market
because it is perceived to reflect the true global cost of money.

    The Fed Funds rate is the  overnight  rate at which banks lend funds to each
other, usually as unsecured loans from regional banks to money center banks. The
Fed Funds rate is the average  dollar-weighted  rate of overnight  funds.  It is
reported with a one-day lag (Monday's rate is reported  Tuesday morning) and may
be found in reports issued by various financial information services.

   
    The manager may invest in instruments  whose interest rate  adjustments  are
based on new indices as these indices become available.
    

    Variable-rate   demand  instruments   include  master  demand  notes.  These
obligations  permit the fund to invest  amounts  that may change  daily  without
penalty under direct arrangements between the fund and the issuer.

    The issuer normally has a corresponding right, after a given period and on a
specified number of days notice,  to prepay the outstanding  principal amount of
the obligation plus accrued interest.  Although there is no secondary market for
master demand notes, these instruments are repayable by the borrower at par plus
accrued interest on seven days' notice.

    Variable- and floating-rate demand instruments frequently are not rated. The
fund may invest in these unrated instruments if the manager  determines,  at the
time of investment,  that they are of a quality  comparable to other obligations
the fund buys.

LOAN PARTICIPATIONS

    Although  the  fund  does not  currently  intend  to do so,  it may buy loan
participations,  which  represent  interests  in  the  cash  flow  generated  by
commercial loans. Each loan participation  requires three parties: a participant
(or investor), a lending bank, and a borrower. The investor purchases a share in
a loan  originated  by a  lending  bank,  and this  participation  entitles  the
investor to a percentage  of the  principal  and interest  payments  made by the
borrower.

    Loan  participations  are  attractive  because they  typically  offer higher
yields than other money  market  instruments.  However,  along with these higher
yields come certain risks, not least of which is the risk that the borrower will
be  unable  to repay  the  loan.  Generally,  since  the  lending  bank does not
guarantee  payment,  the investor is directly  exposed to risk of default by the
borrower.  Secondly,  the investor is not a direct creditor of the borrower. The
participation represents an interest in assets owned by the lending bank. If the
lending bank becomes  insolvent,  the investor  could be considered an unsecured
creditor  of the bank  instead of the holder of a  participating  interest  in a
loan.   Because  of  these  risks,  the  manager  must  carefully  consider  the
creditworthiness of both the borrower and the lender.

    Another  concern is  liquidity.  Because there is no  established  secondary
market  for loan  participations,  the  fund's  ability to sell them for cash is
limited. Some participation agreements place limitations on the


4                                                AMERICAN CENTURY INVESTMENTS


investor's  right to  resell  the loan  participation,  even when a buyer can be
found.  To alleviate  these liquidity  concerns,  the fund generally  limits its
investments  in loan  participations  to  those  with  terms  of 7 days or less,
although it may invest in loan participations with terms of up to 30 days.

SECURITIES LENDING

    The fund may lend its portfolio  securities to earn additional  income. If a
borrower  defaulted on a securities  loan, the fund could  experience  delays in
recovering  securities  it  loaned;  or if the  value of the  loaned  securities
increased over the value of the collateral, the fund could suffer a loss.

    To minimize the risk of default on securities  loans, the manager adheres to
guidelines  prescribed by the Board of Trustees governing lending of securities.
These guidelines strictly govern (i) the type and amount of collateral that must
be received by the fund;  (ii) the  circumstances  under which additions to that
collateral  must be made by borrowers;  (iii) the return received by the fund on
the loaned securities;  (iv) the limitations on the percentage of fund assets on
loan; and (v) the credit standards applied in evaluating  potential borrowers of
portfolio securities. In addition, the guidelines require that the fund have the
option  to  terminate  any  loan of a  portfolio  security  at any  time and set
requirements for recovery of securities from borrowers.

ILLIQUID SECURITIES

    Illiquid  securities are  investments  that cannot be sold or disposed of in
the ordinary  course of business at  approximately  the prices at which they are
valued. Pursuant to guidelines established by the Board of Trustees, the manager
determines the liquidity of the fund's investments, and through reports from the
manager, the Board of Trustees monitors trading activity in illiquid securities.

    In  determining  the  liquidity of the fund's  investments,  the manager may
consider  various factors  including (i) the frequency of trades and quotations,
(ii) the number of dealers and prospective purchasers in the marketplace,  (iii)
dealer undertakings to make a market, (iv) the nature of the security (including
any demand or tender features), and (v) the marketplace for trades.

    In the  absence of market  quotations,  illiquid  securities  are valued for
purposes  of  monitoring  amortized  cost  valuation  at fair  market  value  as
determined in good faith by a committee appointed by the Board of Trustees.

RESTRICTED SECURITIES

    Restricted  securities  generally  can be sold (i) in  privately  negotiated
transactions,  (ii)  pursuant  to  an  exemption  from  registration  under  the
Securities  Act of  1933,  or  (iii)  in a  registered  public  offering.  Where
registration  is  required,  the fund may be obligated to pay all or part of the
registration  expense,  and a considerable period may elapse between the time it
decides to seek  registration  and the time it is  permitted  to sell a security
under an  effective  registration  statement.  If during  such a period  adverse
market conditions were to develop,  the fund might obtain a less favorable price
than prevailed when it decided to seek registration of the security.

    Rule 144A under the Securities Act permits a broader  institutional  trading
market for securities  otherwise subject to restriction on resale to the general
public. Rule 144A establishes a "safe harbor" from the registration requirements
of  the  Securities   Act  for  resales  of  certain   securities  to  qualified
institutional buyers. Investing in Rule 144A securities could increase the level
of fund  illiquidity to the extent that qualified  institutional  buyers become,
for a time, uninterested in purchasing these securities.

   
    The fund also may invest in CP issued in reliance on the "private placement"
exemption  from  registration  under Section 4(2) of the  Securities Act of 1933
(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 fund 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.   Section  4(2)  paper  normally  is  resold  to  other
institutional  investors  like the fund  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 manager may  consider  Section  4(2) paper that meets
certain conditions to be liquid, pursuant to procedures approved by the Board of
Trustees.  Section 4(2) paper that is not  determined  to be liquid  pursuant to
these procedures will be included within the 10% limitation on
    


STATEMENT OF ADDITIONAL INFORMATION                                           5


illiquid   securities.   The  manager  monitors  the  liquidity  of  the  fund's
investments in Section 4(2) paper on a continuing basis.

INVESTMENT RESTRICTIONS

    The fund's  investment  restrictions  are set forth below.  These investment
restrictions  are  fundamental  and may not be changed  without  approval  of "a
majority of the outstanding votes of shareholders" of the fund, as determined in
accordance with the Investment Company Act.

    AS A FUNDAMENTAL POLICY, THE FUND SHALL NOT:

  1)     issue  senior  securities,  except  as  permitted  under the Investment
         Company Act of 1940.

  2)     borrow money, except that the fund may
         borrow money for temporary or emergency purposes (not for leveraging or
         investment)  in an amount not exceeding 33 (1)/(3)% of the fund's total
         assets  (including the amount  borrowed) less  liabilities  (other than
         borrowings).

  3)     lend any security or make any other loan if, as
         a result,  more than 33 (1)/(3)% of the fund's  total  assets  would be
         lent to  other  parties,  except,  (i)  through  the  purchase  of debt
         securities in accordance  with its investment  objective,  policies and
         limitations,  or (ii) by engaging in repurchase agreements with respect
         to portfolio securities.

  4)     purchase or sell real estate  unless  acquired as a result of ownership
         of securities or other  instruments.  This policy shall not prevent the
         fund from investment in securities or other instruments  backed by real
         estate or  securities  of  companies  that  deal in real  estate or are
         engaged in the real estate business.

  5)     concentrate  its  investments  in securities of issuers in a particular
         industry  (other  than  securities  issued  or  guaranteed  by the U.S.
         government  or any of its agencies or  instrumentalities),  except that
         the fund will invest more than 25% of its total assets in the financial
         services industry.

  6)     act as an  underwriter  of securities  issued by others,  except to the
         extent  that the fund  may be  considered  an  underwriter  within  the
         meaning of the Securities Act of 1933 in the  disposition of restricted
         securities.

  7)     purchase or sell physical  commodities  unless  acquired as a result of
         ownership  of  securities  or other  instruments;  provided  that  this
         limitation  shall not  prohibit  the fund from  purchasing  or  selling
         options and futures  contracts or from investing in securities or other
         instruments backed by physical commodities.

  8)     invest for purposes of exercising control over management.

    In  addition,  the fund is subject to the  following  additional  investment
restrictions  which  are not  fundamental  and may be  changed  by the  Board of
Trustees.

    AS AN OPERATING POLICY, THE FUND:

  a)     shall not purchase additional  investment securities at any time during
         which outstanding borrowings exceed 5% of the total assets of the fund.

  b)     shall not purchase or sell  futures  contracts  or call  options.  This
         limitation does not apply to options attached to, or acquired or traded
         together  with,  their  underlying  securities,  and does not  apply to
         securities  that  incorporate  features  similar  to options or futures
         contracts.

  c)     shall not purchase  any  security or enter into a repurchase  agreement
         if, as a result,  more than 10% of its net assets  would be invested in
         repurchase  agreements not entitling the holder to payment of principal
         and interest  within seven days and in securities  that are illiquid by
         virtue of legal or contractual restrictions on resale or the absence of
         a readily available market.

  d)     shall  not sell  securities  short,  unless it owns or has the right to
         obtain securities  equivalent in kind and amount to the securities sold
         short, and provided that  transactions in futures contracts and options
         are not deemed to constitute selling securities short.

  e)     shall not  purchase  securities  on  margin,  except  that the fund may
         obtain such  short-term  credits as are  necessary for the clearance of
         transactions,  and provided  that margin  payments in  connection  with
         futures contracts and options on futures contracts shall not constitute
         purchasing securities on margin.


6                                                AMERICAN CENTURY INVESTMENTS


    For purposes of the investment  restriction (5),  relating to concentration,
the fund shall not purchase any securities  which would cause 25% or more of the
value of the fund's  total  assets at the time of purchase to be invested in the
securities of one or more issuers conducting their principal business activities
in the same industry,  provided that (i) there is no limitation  with respect to
obligations issued or guaranteed by the U.S. government, any state, territory or
possession  of the United  States,  the  District  of  Columbia  or any of their
authorities,   agencies,   instrumentalities   or  political   subdivisions  and
repurchase  agreements  secured by such instruments,  (ii) 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 the parents,
(iii) 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 (iv) personal  credit and business  credit
businesses will be considered separate industries.

    Unless  otherwise   indicated,   percentage   limitations  included  in  the
restrictions apply at the time the fund enters into a transaction.  Accordingly,
any later increase or decrease beyond the specified  limitation resulting from a
change in the fund's new assets will not be considered in determining whether it
has complied with its investment restrictions.

PORTFOLIO TRANSACTIONS

    The fund's  assets are invested by the manager in a manner  consistent  with
the  fund's  investment  objective,  policies,  and  restrictions  and  with any
instructions  the Board of  Trustees  may issue from time to time.  Within  this
framework,  the manager is responsible for making all  determinations  as to the
purchase and sale of portfolio  securities and for taking all steps necessary to
implement securities transactions on behalf of the fund.

    In placing  orders for the purchase and sale of  portfolio  securities,  the
manager  will  use its best  efforts  to  obtain  the best  possible  price  and
execution and will otherwise place orders with broker-dealers  subject to and in
accordance  with any  instructions  the Board of Trustees may issue from time to
time. The manager will select  broker-dealers to execute portfolio  transactions
on behalf of the fund solely on the basis of best price and execution.

    Securities   in  which  the  fund  invests   generally  are  traded  in  the
over-the-counter market through broker-dealers.  A broker-dealer is a securities
firm or bank that makes a market for  securities by offering to buy at one price
and sell at a slightly higher price.

    The  difference  between  the  prices  is known  as a  spread.  The  manager
transacts  in round lots ($1  million  to $10  million or more) on behalf of the
fund  whenever  possible.  Since  commissions  are not charged for money  market
transactions,  the fund's  transaction costs consist solely of custodian charges
and dealer mark-ups.  The fund may hold its portfolio  securities to maturity or
may sell or swap them for other  securities,  depending upon the level and slope
of, and anticipated changes in, the yield curve.

   
    The  fund  acquired,  during  the  fiscal  year  ended  February  28,  1998,
securities  issued by its  regular  brokers or dealers (as defined in Rule 10b-1
under the 1940 Act) and/or their parent  corporations.  As of February 28, 1998,
the fund held  securities  issued by the  following  brokers  or  dealers in the
following  aggregate amounts:  Merrill Lynch,  $44,436,373,  Morgan Stanley Dean
Witter,  $50,332,075,  Goldman  Sachs  Group,  $36,604,707,  Bear  Stearns  Co.,
$9,889,283 and Credit Suisse First Boston, $39,623,977.
    

VALUATION OF PORTFOLIO SECURITIES

   
    The fund's net asset value per share (NAV) is  calculated as of the close of
business of the New York Stock Exchange (the Exchange) usually at 3 p.m. Central
time each day the Exchange is open for business. The Exchange has designated the
following  holiday  closings for 1998: New Year's Day (observed),  Martin Luther
King Jr. Day,  Presidents'  Day, Good Friday,  Memorial Day,  Independence  Day,
Labor Day,  Thanksgiving  Day, and Christmas Day  (observed).  Although the fund
expects the same holiday schedule to be observed in the future, the Exchange may
modify its holiday schedule at any time.
    

    Securities  held by the fund are  valued  at  amortized  cost.  This  method
involves  valuing an instrument at its cost and  thereafter  assuming a constant
amortization  to  maturity  of any  discount  or  premium  paid  at the  time of
purchase.  Although this method  provides  certainty in valuation,  it generally
disregards the effect of


STATEMENT OF ADDITIONAL INFORMATION                                        7


fluctuating  interest rates on an instrument's market value.  Consequently,  the
instrument's  amortized cost value may be higher or lower than its market value,
and this  discrepancy  may be reflected in the fund's yield.  During  periods of
declining  interest rates, for example,  the daily yield on fund shares computed
as described above may be higher than that of a fund with identical  investments
priced at market value.  The converse would apply in a period of rising interest
rates.

    The fund  operates  pursuant  to  Investment  Company  Act Rule 2a-7,  which
permits  valuation of portfolio  securities  on the basis of amortized  cost. As
required by the Rule, the Board of Trustees has adopted  procedures  designed to
stabilize,  to the extent  reasonably  possible,  the fund's  price per share as
computed  for the  purposes  of  sales  and  redemptions  at  $1.00.  While  the
day-to-day  operation of the fund has been delegated to the manager, the quality
requirements   established  by  the  procedures  limit  investments  to  certain
instruments  that the Board of Trustees has  determined  present  minimal credit
risks and that have been rated in one of the two highest  rating  categories  as
determined  by a  rating  agency  or,  in the  case of  unrated  securities,  of
comparable  quality.  The  procedures  require  review of the  fund's  portfolio
holdings  at such  intervals  as are  reasonable  in  light  of  current  market
conditions to determine  whether the fund's net asset value  calculated by using
available market quotations deviates from the per-share value based on amortized
cost.  The procedures  also prescribe the action to be taken if such  deviations
should occur.

   
PERFORMANCE ADVERTISING
    

    The fund's  yield and total  return may be quoted in  advertising  and sales
literature.  Yield and total return will vary.  Past  performance  should not be
considered an indication of future results.

    Yield  quotations  are based on the  change  in the value of a  hypothetical
investment  (excluding realized gains and losses from the sale of securities and
unrealized  appreciation and depreciation of securities) over a seven-day period
(base period) and stated as a percentage  of the  investment at the start of the
base period (base-period  return).  The base-period return is then annualized by
multiplying it by 365/7 with the resulting  yield figure carried to at least the
nearest hundredth of one percent.

    Calculations of effective yield begin with the same base-period  return used
to  calculate  yield,  but the  return  is then  annualized  to  reflect  weekly
compounding according to the following formula:

             Effective Yield = [(Base-Period Return + 1)365/7] - 1

    For the  seven-day  period ended  February  28,  1998,  the fund's yield and
effective yield are indicated in the following table.

   
                                                                       7-Day
                                                7-Day                Effective
                                                Yield                  Yield
- --------------------------------------------------------------------------------
Prime Money Market                              5.17%                  5.30%
- --------------------------------------------------------------------------------
    

    Total returns quoted in advertising and sales literature reflect all aspects
of the fund's return,  including the effect of reinvesting dividends and capital
gain distributions (if any) and any change in the fund's NAV during the period.

    Average  annual total returns are  calculated by  determining  the growth or
decline in value of a  hypothetical  historical  investment in the fund during a
stated period and then calculating the annually compounded  percentage rate that
would have  produced  the same  result if the rate of growth or decline in value
had been constant  throughout the period. For example, a cumulative total return
of 100% over 10 years would produce an average annual return of 7.18%,  which is
the steady annual rate that would equal 100% growth on a compounded  basis in 10
years.  While average  annual total returns are a convenient  means of comparing
investment alternatives, investors should realize that the fund's performance is
not constant over time,  but changes from year to year,  and that average annual
total  returns  represent  averaged  figures as  opposed to actual  year-to-year
performance.

    Average  annual  total  returns  for  periods  of less  than  one  year  are
calculated by determining the fund's total return for the period, extending that
return for a full year (assuming that performance  remains  constant  throughout
the year), and quoting the result as an annual return. Because the fund's return
may not remain  constant over the course of a year,  these  performance  figures
should be viewed as strictly hypothetical.


8                                                 AMERICAN CENTURY INVESTMENTS


    In addition to average annual total returns,  the fund may quote  unaveraged
or  cumulative  total  returns  reflecting  the  simple  change  in  value of an
investment over a stated period. Average annual and cumulative total returns may
be quoted as a  percentage  or as a dollar  amount and may be  calculated  for a
single investment, a series of investments,  or a series of redemptions over any
time period.

   
    The fund's  performance may be compared with the performance of other mutual
funds  tracked by mutual  fund rating  services or with other  indices of market
performance.  This may  include  comparisons  with funds that,  unlike  American
Century funds, are sold with a sales charge or deferred sales charge. Sources of
economic  data that may be used for such  comparisons  may include,  but are not
limited to, U.S. Treasury bill, note, and bond yields, money market fund yields,
U.S.  government debt and percentage held by foreigners,  the U.S. money supply,
net  free  reserves,  and  yields  on  current-coupon  GNMAs  (source:  Board of
Governors of the Federal Reserve  System);  the federal funds and discount rates
(source:  Federal  Reserve  Bank of New York);  yield  curves for U.S.  Treasury
securities and AA/AAA-rated  corporate  securities (source:  Bloomberg Financial
Markets);  yield curves for AAA-rated  tax-free  municipal  securities  (source:
Telerate);  yield curves for foreign government  securities (sources:  Bloomberg
Financial  Markets and Data  Resources,  Inc.);  total  returns on foreign bonds
(source:  J.P.  Morgan  Securities  Inc.);  various U.S. and foreign  government
reports;  the junk bond market (source:  Data Resources,  Inc.); the CRB Futures
Index  (source:  Commodity  Index Report);  the price of gold  (sources:  London
a.m./p.m.  fixing and New York Comex Spot Price); rankings of any mutual fund or
mutual fund category tracked by Lipper Analytical Services, Inc. or Morningstar,
Inc.;   mutual  fund  rankings   published  in  major   nationally   distributed
periodicals;  data  provided  by  the  Investment  Company  Institute;  Ibbotson
Associates,  Stocks, Bonds, Bills, and Inflation;  major indices of stock market
performance;  and  indices and  historical  data  supplied  by major  securities
brokerage or investment  advisory firms. The fund also may utilize reprints from
newspapers  and magazines  furnished by third  parties to illustrate  historical
performance.

    The fund's  shares are sold without a sales charge (or load).  No-load funds
offer an  advantage  to investors  when  compared to load funds with  comparable
investment objectives and strategies.
    

    The manager may obtain fund ratings from one or more rating agencies and may
publish these ratings in advertisements and sales literature.

TAXES

FEDERAL INCOME TAX

    The fund intends to qualify each year as a  "regulated  investment  company"
under Subchapter M of the Internal Revenue Code of 1986, as amended, (the Code).
To qualify as a regulated  investment company and avoid being subject to federal
and state income taxes at the fund level,  the fund must distribute  within each
calendar  year  as  well  as  each  fiscal  year  substantially  all of its  net
investment  income and net realized capital gains (if any) to  shareholders.  In
addition to federal income taxes, shareholders may be subject to state and local
taxes on their distributions from the fund.

    The  information  above is only a summary of some of the tax  considerations
generally  affecting the fund and its shareholders.  No attempt has been made to
discuss individual tax consequences.

    An investor considering an investment in the fund should consult with his or
her tax advisors to determine whether the fund is a suitable investment.

ABOUT THE TRUST

    American  Century  Investment  Trust (the  Trust) is a  registered  open-end
management  investment  company that was organized as a  Massachusetts  business
trust on June 16, 1993. The Trust was formerly known as Benham Investment Trust.
Currently  American  Century-Benham  Prime Money Market Fund (formerly  known as
Benham Prime Money  Market  Fund) is the only series of the Trust,  although the
Trustees are authorized to create additional series at their discretion.

    The Declaration of Trust permits the Board of Trustees to issue an unlimited
number of full and fractional  shares of beneficial  interest without par value,
which may be issued in series  (or  funds).  Shares  issued  are fully  paid and
nonassessable and have no preemptive, conversion, or similar rights.


STATEMENT OF ADDITIONAL INFORMATION                                         9


    If  additional  series were  created by the Board of  Trustees,  each series
would vote  separately  on matters  affecting  that series  exclusively.  Voting
rights  are not  cumulative,  so that  investors  holding  more  than 50% of the
Trust's (i.e., all series')  outstanding  shares may be able to elect a Board of
Trustees.  The Trust instituted  dollar-based voting, meaning that the number of
votes you are  entitled to is based upon the dollar  amount of your  investment.
The  election of Trustees is  determined  by the votes  received  from all Trust
shareholders  without  regard to whether a majority  of shares of any one series
voted in favor of a particular nominee or all nominees as a group.

    Each shareholder has rights to dividends and  distributions  declared by the
fund and to the net  assets  of the fund  upon its  liquidation  or  dissolution
proportionate to his or her share ownership interest in the fund.

    Shareholders  of  a  Massachusetts   business  trust  could,  under  certain
circumstances,  be held  personally  liable for its  obligations.  However,  the
Declaration of Trust contains an express disclaimer of shareholder liability for
acts or  obligations  of the Trust.  The  Declaration of Trust also provides for
indemnification and reimbursement of expenses of any shareholder held personally
liable for obligations of the Trust.  The Declaration of Trust provides that the
Trust  will,  upon  request,  assume the  defense of any claim made  against any
shareholder  for any act or  obligation  of the Trust and satisfy  any  judgment
thereon.  The Declaration of Trust further  provides that the Trust may maintain
appropriate insurance (for example, fidelity,  bonding, and errors and omissions
insurance)  for  the  protection  of  the  Trust,  its  shareholders,  Trustees,
officers,  employees,  and agents to cover possible tort and other  liabilities.
Thus,  the  risk  of a  shareholder  incurring  financial  loss as a  result  of
shareholder  liability  is limited  to  circumstances  in which both  inadequate
insurance exists and the Trust is unable to meet its obligations.

   
CUSTODIANS
    

    Chase Manhattan Bank, 4 Chase Metrotech Center, Brooklyn, New York 11245 and
Commerce Bank N.A., 1000 Walnut, Kansas City, Missouri 64106 serve as custodians
of the fund's  assets.  Services  provided by the  custodian  banks  include (i)
settling  portfolio  purchases and sales,  (ii) reporting  failed trades,  (iii)
identifying and collecting  portfolio income, and (iv) providing  safekeeping of
securities.  The custodians  take no part in determining  the fund's  investment
policies or in determining which securities are sold or purchased by the fund.

INDEPENDENT ACCOUNTANTS

   
    Coopers & Lybrand L.L.P., City Center Square,  1100 Main Street,  Suite 900,
Kansas City, Missouri 64105-2140,  serves as the Trust's independent accountants
and provides services including the audit of the annual financial statements.
    

MULTIPLE CLASS STRUCTURE

   
    The fund's Board of Trustees has adopted a multiple class plan (the Multiple
Class Plan)  pursuant to Rule 18f-3  adopted by the SEC.  Pursuant to such plan,
the fund may issue up to two classes of shares: an Investor Class and an Advisor
Class.

    The Investor Class is made available to investors  directly without any load
or commission,  for a single unified  management  fee. The Advisor Class is made
available to institutional shareholders or through financial intermediaries that
do not require the same level of shareholder  and  administrative  services from
the manager as Investor Class shareholders.  As a result, the manager is able to
charge  this class a lower  unified  management  fee. In addition to the unified
management  fee,  however,  the  Advisor  Class  shares are  subject to a Master
Distribution  and  Shareholder  Services Plan (described on page 11). Both plans
have been  adopted by the fund's Board of Trustees  and initial  shareholder  in
accordance with Rule 12b-1 adopted by the SEC under the Investment Company Act.

RULE 12B-1

    Rule 12b-1 permits an investment company to pay expenses associated with the
distribution  of its shares in accordance  with a plan adopted by the investment
company's Board of Trustees and approved by its  shareholders.  Pursuant to such
rule, the Board of Trustees and initial  shareholder of the fund's Advisor Class
have approved and entered into a Master  Distribution  and Shareholder  Services
Plan, with respect to the Advisor Class (the Plan). The Plan is described below.

    In adopting the Plan, the Board of Trustees
    


10                                               AMERICAN CENTURY INVESTMENTS


   
(including a majority of Trustees who are not  "interested  persons" of the fund
[as  defined  in the  Investment  Company  Act],  hereafter  referred  to as the
"independent  Trustees")  determined that there was a reasonable likelihood that
the Plans would  benefit the fund and the  shareholders  of the affected  class.
Pursuant to Rule 12b-1,  information with respect to revenues and expenses under
the Plan is presented to the Board of Trustees  quarterly for its  consideration
in  connection  with  its  deliberations  as to the  continuance  of  the  Plan.
Continuance  of the Plan must be approved by the Board of Trustees  (including a
majority of the  independent  Trustees)  annually.  The Plan may be amended by a
vote of the Board of Trustees (including a majority of the independent Trustees)
, except that the Plan may not be amended to  materially  increase the amount to
be spent for distribution  without majority  approval of the shareholders of the
affected class. The Plan terminates  automatically in the event of an assignment
and may be terminated upon a vote of a majority of the  independent  Trustees or
by vote of a majority  of the  outstanding  voting  securities  of the  affected
class.

    All fees paid under the Plan will be made in  accordance  with Section 26 of
the Rules of Fair Practice of the National Association of Securities Dealers.

MASTER DISTRIBUTION AND SHAREHOLDER SERVICES PLAN

    As described in the Prospectuses, the fund's Advisor Class of shares is also
made available to participants in employer-sponsored retirement or savings plans
and to  persons  purchasing  through  financial  intermediaries,  such as banks,
broker-dealers  and insurance  companies.  The distributor enters into contracts
with various  banks,  broker-dealers,  insurance  companies and other  financial
intermediaries  with respect to the sale of the fund's  shares and/or the use of
the fund's shares in various  investment  products or in connection with various
financial services.

    Certain  recordkeeping and administrative  services that are provided by the
fund's transfer agent for the Investor Class  shareholders may be performed by a
plan sponsor (or its agents) or by a financial  intermediary for shareholders in
the Advisor Class.  In addition to such services,  the financial  intermediaries
provide various distribution services.

    To enable  the fund's  shares to be made  available  through  such plans and
financial  intermediaries,  and to compensate them for such services, the fund's
manager has reduced its unified  management  fee by 0.25% per annum with respect
to the  Advisor  Class  shares and the fund's  Board of  Trustees  has adopted a
Master  Distribution  and  Shareholder  Services Plan (the  Distribution  Plan).
Pursuant to such Plan,  the Advisor Class shares pay a fee of 0.50%  annually of
the aggregate average daily assets of the fund's Advisor Class shares,  0.25% of
which is paid for Shareholder  Services (as described  below) and 0.25% of which
is paid for distribution services.

    The  manager  and the  fund's  distributor,  Funds  Distributor,  Inc.  (the
distributor)  enter into  contracts  with each  financial  intermediary  for the
provision of certain shareholder  services and utilizes the shareholder services
fees received under the Plan to pay for such services.  Payments may be made for
a variety  of  shareholder  services,  including,  but are not  limited  to, (a)
receiving, aggregating and processing purchase, exchange and redemption requests
from beneficial  owners  (including  contract owners of insurance  products that
utilize the fund as underlying investment media) of shares and placing purchase,
exchange and redemption orders with the distributor;  (b) providing shareholders
with a service that invests the assets of their  accounts in shares  pursuant to
specific or pre-authorized instructions; (c) processing dividend payments from a
fund on behalf of shareholders and assisting  shareholders in changing  dividend
options,  account  designations  and  addresses;  (d) providing and  maintaining
elective services such as check writing and wire transfer  services;  (e) acting
as  shareholder  of record and nominee for beneficial  owners;  (f)  maintaining
account records for  shareholders  and/or other beneficial  owners;  (g) issuing
confirmations  of  transactions;  (h)  providing  subaccounting  with respect to
shares  beneficially  owned by  customers  of third  parties  or  providing  the
information  to a fund as necessary  for such  subaccounting;  (i) preparing and
forwarding   shareholder   communications   from  the  fund  (such  as  proxies,
shareholder reports,  annual and semi-annual  financial statements and dividend,
distribution and tax notices) to shareholders  and/or other  beneficial  owners;
(j) providing other similar administrative and sub-transfer agency
    


STATEMENT OF ADDITIONAL INFORMATION                                          11


   
services;  and  (k)  paying  "service  fees"  for  the  provision  of  personal,
continuing services to investors,  as contemplated by the Rules of Fair Practice
of the NASD (collectively  referred to as "shareholder  services").  Shareholder
services  do not  include  those  activities  and  expenses  that are  primarily
intended to result in the sale of additional shares of the fund.

    Distribution  services  include any activity  undertaken or expense incurred
that is primarily intended to result in the sale of Advisor Class shares,  which
services  may  include  but  are  not  limited  to,  (a) the  payment  of  sales
commissions,  ongoing  commissions  and  other  payments  to  brokers,  dealers,
financial  institutions  or others who sell  Advisor  Class  shares  pursuant to
selling  agreements;  (b)  compensation to registered  representatives  or other
employees of  distributor  who engage in or support  distribution  of the fund's
Advisor Class shares; (c) compensation to, and expenses  (including overhead and
telephone  expenses)  of,   distributor;   (d)  the  printing  of  prospectuses,
statements  of  additional  information  and  reports  for other  than  existing
shareholders; (e) the preparation, printing and distribution of sales literature
and advertising  materials  provided to the fund's  shareholders and prospective
shareholders;  (f)  receiving  and  answering  correspondence  from  prospective
shareholders,  including  distributing  prospectuses,  statements  of additional
information,  and shareholder reports; (g) the providing of facilities to answer
questions  from  prospective  investors  about fund shares;  (h) complying  with
federal and state  securities  laws  pertaining to the sale of fund shares;  (i)
assisting  investors in completing  application forms and selecting dividend and
other  account  options;  (j) the  providing of other  reasonable  assistance in
connection  with  the  distribution  of  fund  shares;  (k) the  organizing  and
conducting  of  sales  seminars  and  payments  in  the  form  of  transactional
compensation  or promotional  incentives;  (l) profit on the foregoing;  (m) the
payment of "service fees" for the provision of personal,  continuing services to
investors,  as  contemplated  by the Rules of Fair  Practice of the NASD and (n)
such other distribution and services activities as the manager determines may be
paid for by the fund  pursuant to the terms of this  Agreement and in accordance
with Rule 12b-1 of the Investment Company Act.
    

TRUSTEES AND OFFICERS

   
    The Trust's  activities  are overseen by a Board of Trustees,  including six
independent trustees.  The individuals listed below whose names are marked by an
asterisk (*) are "interested persons" of the Trust (as defined in the Investment
Company Act) by virtue of, among other  considerations,  their  affiliation with
either the Trust;  the Trust's  manager;  the  Trust's  agent for  transfer  and
administrative  services,  American  Century  Services  Corporation  (ACS);  the
Trust's  distribution  agent,  Funds  Distributor,   Inc.  (FDI);  their  parent
corporation,  American Century Companies,  Inc. (ACC) or ACC's subsidiaries;  or
other funds  advised by the  manager.  Each  trustee  listed  below  serves as a
trustee or director  of other funds  advised by the  manager.  Unless  otherwise
noted, dates in parentheses  indicate the dates the trustee or officer began his
or her service in a particular  capacity.  The trustees'  and officers'  address
with the  exception  of Messrs.  Lyons,  Looby,  Zindel and Stowers III, and Ms.
Roepke and Ms. Wade, is 1665 Charleston Road,  Mountain View,  California 94043.
The address of Messrs.  Lyons, Looby, Zindel and Stowers III, and Ms. Roepke and
Ms. Wade, is American  Century Tower,  4500 Main Street,  Kansas City,  Missouri
64111.

TRUSTEES

    ALBERT A. EISENSTAT  (67),  independent  Trustee  (1995).  Mr.  Eisenstat is
currently the general partner of Discovery  Ventures  (1996),  a venture capital
firm. He also is an independent Director of each of Commercial Metals Co. (1982)
, Sungard Data Systems (1991) and Business  Objects S/A (1994).  Previously,  he
served as Vice  President of Corporate  Development  and Corporate  Secretary of
Apple Computer and served on its Board of Directors (1985 to 1993).

    RONALD J. GILSON (51), independent Trustee (1995). Mr. Gilson is the Charles
J. Meyers  Professor of Law and  Business at Stanford Law School  (1979) and the
Mark and Eva Stern Professor of Law and Business at Columbia  University  School
of Law (1992). He is counsel to Marron, Reid & Sheehy (a San Francisco law firm,
1984).

    *WILLIAM  M. LYONS (42),  Trustee  (1998).  Mr.  Lyons is  President,  Chief
Operating Officer and General Counsel of ACC; Executive Vice President and
    


12                                              AMERICAN CENTURY INVESTMENTS


   
General  Counsel of ACS and ACIS;  Assistant  Secretary of ACC; and Secretary of
ACS and ACIS.

    MYRON S. SCHOLES (56),  independent  Trustee (1993). Mr. Scholes was awarded
the  1997  Nobel  Memorial  Prize  in  Economic  Sciences  for  his  role in the
development  of  the  Black-Scholes  option  pricing  model.  Mr.  Scholes  is a
principal of Long-Term Capital  Management  (1993). He is also the Frank E. Buck
Professor of Finance at the Stanford  Graduate  School of Business  (1983) and a
Director of  Dimensional  Fund Advisors  (1982) and the Smith Breeden  Family of
Funds (1992). From August 1991 to June 1993, Mr. Scholes was a Managing Director
of Salomon Brothers Inc. (securities brokerage).

    KENNETH E. SCOTT (69), independent Trustee (1993). Mr. Scott is the Ralph M.
Parsons  Professor  of Law and  Business  at  Stanford  Law School  (1972) and a
Director of RCM Capital Funds, Inc. (1994).

    ISAAC STEIN (51),  independent  Trustee (1993). Mr. Stein is former Chairman
of the Board (1990 to 1992) and Chief Executive Officer (1991 to 1992) of Esprit
de Corp.  (clothing  manufacturer).  He is a  member  of the  Board  of  Raychem
Corporation (electrical equipment, 1993), President of Waverley Associates, Inc.
(private   investment   firm,   1983),   and  a  Director  of  ALZA  Corporation
(pharmaceuticals,  1987). He is also a Trustee of Stanford University (1994) and
Chairman of Stanford Health Services (hospital, 1994).

    *JAMES E.  STOWERS  III  (39),  Trustee  (1995).  Mr.  Stowers  III is Chief
Executive  Officer and Director of ACC;  President,  Chief Executive Officer and
Director of ACS and ACIS.

    JEANNE D. WOHLERS (53), independent Trustee (1993). Ms. Wohlers is a private
investor and an independent Director and Partner of Windy Hill Productions,  LP.
Previously,  she served as Vice President and Chief Financial Officer of Sybase,
Inc. (software company, 1988 to 1992).
    

OFFICERS

   
    *RICHARD W. INGRAM (42),  President  (1998);  Executive  Vice  President and
Director of Client  Services and  Treasury  Administration  of FDI.  Mr.  Ingram
joined FDI in 1995.  Prior to joining FDI, Mr. Ingram  served as Vice  President
and Division  Manager of First Data Investor  Services  Group,  Inc. (from March
1994 to November 1995), and before that as Vice President,  Assistant  Treasurer
and Tax Director - Mutual Funds of The Boston Company, Inc. (from 1989 to 1994).

    *DOUGLAS A. PAUL (51),  Secretary (1993), Vice President (1993), and General
Counsel  (1993);  Secretary  and Vice  President  of the  funds  advised  by the
Manager.

    *MARYANNE  ROEPKE (42), CPA, Chief Financial  Officer and Treasurer  (1995);
Senior Vice President and Assistant Treasurer of ACS.

    *CHRISTOPHER  J. KELLEY (33),  Vice  President  (1998);  Vice  President and
Associate  General  Counsel of FDI.  Mr.  Kelley  joined  FDI in 1996.  Prior to
joining FDI, Mr. Kelley  served as Assistant  Counsel at Forum  Financial  Group
(from April 1994 to July  1996),  and before  that as a  compliance  officer for
Putnam Investments (from 1992 to 1994).

    *MARY A. NELSON (34), Vice President  (1998);  Vice President and Manager of
Treasury  Services and  Administration  of FDI. Ms.  Nelson  joined FDI in 1995.
Prior to joining FDI, Ms. Nelson served as Assistant  Vice  President and Client
Manager for The Boston Company, Inc. (from 1989 to 1994).

    *PATRICK A. LOOBY (39), Vice President and Assistant  Secretary (1998); Vice
President of ACS.

    *JON ZINDEL (30),  Tax Officer  (1997);  Director of Taxation  (1996);  Vice
President of ACS (1998); Tax Manager, Price Waterhouse LLP (1989).

    *C. JEAN WADE (34), Controller (1996).

    The table on the next page  summarizes  the  compensation  that the trustees
received for the fund's  fiscal year ended  February  28,  1998,  as well as the
compensation  received  for  serving as a director or trustee of all other funds
advised by the manager.

    As of May 31, 1998, the fund's trustees and officers, as a group, owned less
than 1% of the fund's total shares outstanding.
    


STATEMENT OF ADDITIONAL INFORMATION                                          13


   
TRUSTEE COMPENSATION FOR THE FISCAL YEAR ENDED FEBRUARY 28, 1998

                                                     Total Compensation
                                Aggregate                 From the
   Name of                    Compensation            American Century
   Trustee*                  From The Fund            Family of Funds**
- ----------------------------------------------------------------------------
Albert A. Eisenstat              $1,357                    $60,000
Ronald J. Gilson                 $9,095                    $68,000
Myron S. Scholes                 $1,242                    $58,750
Kenneth E. Scott                 $8,916                    $66,000
Ezra Solomon***                  $X,XXX                    $XX,XXX
Isaac Stein                      $8,569                    $62,500
Jeanne D. Wohlers                $1,562                    $62,500
- ----------------------------------------------------------------------------

*   Interested Trustees receive no compensation for their services as such.

**  Includes  compensation  paid by the 15  investment  company  members  of the
    American Century family of funds.

*** Retired December, 1996.

    The  trust  has  adopted  the  American   Century   Mutual  Funds   Deferred
Compensation Plan for Non-Interested  Directors or Trustees. Under the Plan, the
non-interested  person  trustees may defer receipt of all or part of the fees to
be paid to them for serving as trustees of the corporation.

    Under the Plan, all deferred fees are credited to an account  established in
the name of the trustees.  The amounts  credited to the account then increase or
decrease,  as the case may be, in accordance with the performance of one or more
of the American  Century  funds that are selected by the  director.  The account
balance  continues  to  fluctuate  in  accordance  with the  performance  of the
selected  fund or funds  until  final  payment of all  amounts  credited  to the
account.  Trustees are allowed to change their  designation of mutual funds from
time to time.

    No deferred fees are payable until such time as a trustee  resigns,  retires
or  otherwise  ceases  to be a member  of the Board of  Trustees.  Trustees  may
receive  deferred  fee  account  balances  either  in a lump sum  payment  or in
substantially equal installment  payments to be made over a period not to exceed
10 years.  Upon the death of a  trustee,  all  remaining  deferred  fee  account
balances are paid to the  trustee's  beneficiary  or, if none,  to the trustee's
estate.

    The Plan is an  unfunded  plan and,  accordingly,  American  Century  has no
obligation to segregate  assets to secure or fund the deferred  fees. The rights
of the trustees to receive their  deferred fee account  balances are the same as
the rights of a general unsecured  creditor of the corporation.  The Plan may be
terminated  at any  time  by  the  administrative  committee  of  the  Plan.  If
terminated, all deferred fee account balances will be paid in a lump sum.

    No deferred  fees were paid to any trustee  under the Plan during the fiscal
year ended February 28, 1998.

    Those  trustees who are  "interested  persons," as defined in the Investment
Company  Act,  receive no fee as such for serving as a trustee.  The salaries of
such individuals, who also are officers of the fund, are paid by the manager.
    

MANAGEMENT

    The fund has an  investment  management  agreement  with the  manager  dated
August 1, 1997.  This agreement was approved by the  shareholders of the fund on
July 30, 1997.

   
    For the services  provided to the fund,  the manager  receives a monthly fee
based on a percentage of the average net assets of the fund.  The annual rate at
which this fee is assessed is determined monthly in a two-step process: First, a
fee rate  schedule  is applied to the  assets of all of the money  market  funds
managed by the manager  (the  Investment  Category  Fee).  The three  investment
categories  are:  Money Market  Funds,  Bond Funds and Equity Funds.  Second,  a
separate fee rate  schedule is applied to the assets of all of the funds managed
by the manager (the Complex Fee).  The  Investment  Category Fee and the Complex
Fee are then added to determine the unified  management  fee payable by the fund
to the manager.
    

    The  schedule  by which the  Investment  Category  Fee is  determined  is as
follows:

Category Assets                                                    Fee Rate
- --------------------------------------------------------------------------------
First $1 billion                                                   0.3700%
Next $1 billion                                                    0.3270%
Next $3 billion                                                    0.2860%
Next $5 billion                                                    0.2690%
Next $15 billion                                                   0.2580%
Next $25 billion                                                   0.2575%
Thereafter                                                         0.2570%
- --------------------------------------------------------------------------------


   
14                                               AMERICAN CENTURY INVESTMENTS
    


    The Complex Fee Schedule is as follows:

Complex Assets                                                     Fee Rate
- --------------------------------------------------------------------------------
First $2.5 billion                                                 0.3100%
Next $7.5 billion                                                  0.3000%
Next $15.0 billion                                                 0.2985%
Next $25.0 billion                                                 0.2970%
Next $50.0 billion                                                 0.2960%
Next $100.0 billion                                                0.2950%
Next $100.0 billion                                                0.2940%
Next $200.0 billion                                                0.2930%
Next $250.0 billion                                                0.2920%
Next $500.0 billion                                                0.2910%
Thereafter                                                         0.2900%
- --------------------------------------------------------------------------------

   
    The Advisor Class Complex Fee Schedule is as  follows:

Complex Assets                                                     Fee Rate
- --------------------------------------------------------------------------------
First $2.5 billion                                                 0.0600%
Next $7.5 billion                                                  0.0500%
Next $15.0 billion                                                 0.0485%
Next $25.0 billion                                                 0.0470%
Next $50.0 billion                                                 0.0460%
Next $100.0 billion                                                0.0450%
Next $100.0 billion                                                0.0440%
Next $200.0 billion                                                0.0430%
Next $250.0 billion                                                0.0420%
Next $500.0 billion                                                0.0410%
Thereafter                                                         0.0400%
- --------------------------------------------------------------------------------
    

    On the first  business day of each month,  the fund pays a management fee to
the  manager  for the  previous  month at the  specified  rate.  The fee for the
previous month is calculated by  multiplying  the applicable fee for the fund by
the  aggregate  average  daily closing value of the fund's net assets during the
previous  month by a fraction,  the  numerator of which is the number of days in
the previous month and the denominator of which is 365 (366 in leap years).

    The management  agreement  shall continue in effect until the earlier of the
expiration  of two  years  from the date of its  execution  or until  the  first
meeting of  shareholders  following such execution and for as long thereafter as
its  continuance  is  specifically  approved at least annually by (i) the fund's
Board of Trustees, or by the vote of a majority of outstanding votes (as defined
in the  Investment  Company  Act)  and  (ii) by the  vote of a  majority  of the
Trustees of the fund who are not parties to the agreement or interested  persons
of the manager,  cast in person at a meeting called for the purpose of voting on
such approval.

    The  management  agreement  provides  that it may be  terminated at any time
without payment of any penalty by the fund's Board of Trustees,  or by a vote of
a  majority  of the  fund's  shareholders,  on 60 days'  written  notice  to the
manager, and that it shall be automatically terminated if it is assigned.

    The  management  agreement  provides that the manager shall not be liable to
the fund or its  shareholders for anything other than willful  misfeasance,  bad
faith, gross negligence or reckless disregard of its obligations and duties.

    The  management  agreement  also provides that the manager and its officers,
trustees and employees may engage in other  business,  devote time and attention
to any other  business  whether of a similar or  dissimilar  nature,  and render
services to others.

    Certain  investments  may be  appropriate  for the fund  and also for  other
clients  advised by the  manager.  Investment  decisions  for the fund and other
clients are made with a view to achieving their respective investment objectives
after  consideration of such factors as their current holdings,  availability of
cash for investment,  and the size of their investment  generally.  A particular
security  may be bought or sold for only one client or series,  or in  different
amounts  and at  different  times for more than one but less than all clients or
series. In addition, purchases or sales of the same security may be made for two
or more clients or series on the same date. Such  transactions will be allocated
among  clients in a manner  believed by the manager to be equitable to each.  In
some cases this procedure could have an adverse effect on the price or amount of
the securities purchased or sold by the fund.

    The manager may aggregate purchase and sale orders of the fund with purchase
and sale  orders  of its  other  clients  when the  manager  believes  that such
aggregation  provides  the best  execution  for the fund.  The  fund's  Board of
Trustees has approved the policy of the manager with respect to the  aggregation
of portfolio  transactions.  Where portfolio  transactions have been aggregated,
the fund  participates  at the average share price for all  transactions in that
security on a given day and share transaction costs on a pro


STATEMENT OF ADDITIONAL INFORMATION                                          15


rata basis.  The manager will not aggregate  portfolio  transactions of the fund
unless it believes such  aggregation  is  consistent  with its duty to seek best
execution on behalf of the fund and the terms of the management  agreement.  The
manager receives no additional  compensation or remuneration as a result of such
aggregation.

    In addition to managing  the fund,  the manager  also acts as an  investment
advisor to 12 institutional  accounts and to the following registered investment
companies:  American Century Mutual Funds,  Inc.,  American Century World Mutual
Funds, Inc., American Century Premium Reserves,  Inc., American Century Variable
Portfolios, Inc. and American Century Capital Portfolios, Inc., American Century
Strategic Asset Allocations,  Inc.,  American Century Municipal Trust,  American
Century  Government  Income Trust,  American  Century Target  Maturities  Trust,
American  Century  California  Tax-Free and Municipal  Funds,  American  Century
Quantitative Equity Funds and American Century International Bond Funds.

   
    Prior to August 1,  1997,  Benham  Management  Corporation,  a  wholly-owned
subsidiary of ACC,  served as the investment  advisor to the fund. In late 1997,
Benham Management Corporation was merged into the manager.
    

    The  investment  advisory  fees  paid by the  fund to the  manager  (and its
affiliate Benham Management Corporation) for the fiscal years ended February 28,
1998,  February 28, 1997,  and February 29, 1996, are indicated on the following
table.

   
                            INVESTMENT ADVISORY FEES

Fiscal                      Investment
Year Ended                  Advisory Fees Paid               Reimbursed
- --------------------------------------------------------------------------------
1998(1)                     $1,551,500(2)                    $785,248
1997                        $2,265,360(3)                    $1,584,981
1996                        $2,316,045(3)                    $1,839,833
- --------------------------------------------------------------------------------

(1)  From March 1, 1997 through July 31, 1997.
(2)  Gross of reimbursements.
(3)  Net of reimbursements.

                            UNIFIED MANAGEMENT FEES*

Fiscal                      Unified Management               Amount
Year Ended                  Fees Paid                        Waived
- --------------------------------------------------------------------------------
1998(1)                     $4,730,735(2)                    $805,481
- --------------------------------------------------------------------------------

(1)  From August 1, 1997 through February 28, 1998.
(2)  Gross of reimbursements.
    

TRANSFER AND ADMINISTRATIVE SERVICES

    American  Century  Services  Corporation,  4500 Main  Street,  Kansas  City,
Missouri  64111,  acts as transfer agent and dividend paying agent for the fund.
It provides physical  facilities,  including  computer hardware and software and
personnel, for the day-to-day administration of the fund and of the manager. The
manager pays American Century Services Corporation for such services.

    Prior to August 1, 1997, the fund paid American Century Services Corporation
directly for its services as transfer agent and administrative services agent.

   
    Transfer agent and administrative agent fees paid by the fund for the fiscal
years ended  February 28, 1998,  February 28, 1997,  and February 29, 1996,  are
indicated in the following table.

Fiscal                      Transfer                         Administrative
Year Ended                  Agent Fees                       Agent Fees
- --------------------------------------------------------------------------------
1998                        $765,989                         $476,721
1997                        $1,844,608                       $1,188,257
1996                        $1,975,550                       $1,319,915
- --------------------------------------------------------------------------------
    

    Due to the expense  limitation  agreements  made under its prior  investment
advisory agreement with Benham Management Corporation, the fund paid no transfer
agent or administrative fees for the fiscal year ended February 28, 1995, or for
the period from November 17, 1993 (commencement of operations), through February
28, 1994.

DISTRIBUTION OF FUND SHARES

   
    The fund's shares are  distributed  by Funds  Distributor,  Inc. The manager
pays all expenses for promoting and  distributing  the fund's  shares.  The fund
does not pay any  commissions  or other fees to the  distributor or to any other
broker-dealers  or financial  intermediaries in connection with the distribution
of fund shares.
    


16                                                AMERICAN CENTURY INVESTMENTS


ADDITIONAL PURCHASE AND REDEMPTION INFORMATION

    The  fund's  shares  are  continuously  offered  at net asset  value.  Share
certificates  are  issued  (without  charge)  only when  requested  in  writing.
Certificates  are not issued for fractional  shares.  Dividend and voting rights
are not affected by the issuance of certificates.

   
    As of March 31, 1998, to the fund's knowledge, no shareholder was the record
holder or beneficial owner of 5% or more of the fund's total shares outstanding.
    

    American  Century may reject or limit the amount of an investment to prevent
any one  shareholder  or  affiliated  group  from  controlling  the Trust or its
series; to avoid jeopardizing a series' tax status; or whenever, in management's
opinion,  such  rejection  or  limitation  is in the  Trust's or a series'  best
interest.

    ACS charges  neither fees nor  commissions  on the purchase and sale of fund
shares.  However,  ACS may  charge  fees for  special  services  requested  by a
shareholder or necessitated by acts or omissions of a shareholder.  For example,
ACS may charge a fee for processing dishonored investment checks or stop-payment
requests. See the Investor Services Guide for more information.

    When it is in the  best  interest  of the  fund  and its  shareholders  (for
example,  to deter  abusive  market  timing  transactions),  the fund may  honor
redemption requests in kind, normally by delivering portfolio securities in lieu
of cash.  Securities delivered as redemptions in kind will be valued by the same
method used to value securities in determining the fund's NAV.  Shareholders who
receive  securities  may realize a capital gain or loss for tax purposes,  incur
costs  in  handling  or  disposing  of  the   securities,   or  encounter  other
inconveniences.

OTHER INFORMATION

    For further  information,  please refer to the  registration  statement  and
exhibits on file with the SEC in Washington,  DC. These  documents are available
upon payment of a  reproduction  fee.  Statements in the  Prospectus and in this
Statement  of  Additional  Information  concerning  the contents of contracts or
other  documents,  copies  of which are filed as  exhibits  to the  registration
statement, are qualified by reference to such contracts or documents.

SECURITIES RATINGS

    Securities  rating  descriptions  provided  under this heading are excerpted
from  publications  of Moody's  Investors  Service,  Inc.  and Standard & Poor's
Corporation.

DESCRIPTION OF MOODY'S INVESTORS SERVICE, INC.'S  BOND RATINGS:

    Aaa:  Bonds that 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 edge." Interest payments are protected by a large or 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  that are  rated  "Aa" are  judged to be of high  quality  by all
standards. Together with the Aaa group, they constitute 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 that make long-term risks appear somewhat larger than in Aaa securities.

    A: Bonds that 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
that suggest a susceptibility to impairment sometime in the future.

    Baa:  Bonds that are rated "Baa" are  considered  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 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 that 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  in  the  future.  Uncertainty  of  position
characterizes bonds in this class.


STATEMENT OF ADDITIONAL INFORMATION                                        17


    B: Bonds that are rated "B" generally  lack  characteristics  of a desirable
investment.  Assurance of interest and principal  payments or of  maintenance of
other terms of the contract over any long period of time may be limited.

    Caa: Bonds that are rated "Caa" are of poor standing.  Such issues may be in
default, or there may be elements of danger present with respect to principal or
interest.

    Ca: Bonds that are rated "Ca" represent  obligations that are speculative to
a  high  degree.  Such  issues  are  often  in  default  or  have  other  marked
shortcomings.

    C: Bonds that are rated "C" are the lowest-rated  class of bonds, and issues
so rated can be regarded as having  extremely  poor  prospects of ever attaining
any real investment standing.

    Note:  Moody's may apply the numerical  modifier "1" for municipally  backed
bonds and modifiers "1," "2," and "3" for corporate-backed  municipal bonds. The
modifier "1" indicates  that the security ranks in the higher end of its generic
rating  category;  the  modifier  "2"  indicates  a mid-range  ranking,  and the
modifier  "3"  indicates  that the issue  ranks in the lower end of its  generic
rating category.

DESCRIPTION OF MOODY'S INVESTORS SERVICE, INC.'S RATINGS OF NOTES AND
VARIABLE-RATE DEMAND OBLIGATIONS:

    Moody's  ratings  for  state  and  municipal   short-term   obligations  are
designated   Moody's  Investment  Grade  or  MIG.  Such  ratings  recognize  the
differences between short-term credit and long-term risk.  Short-term ratings on
issues   with   demand   features   (variable-rate   demand   obligations)   are
differentiated by the use of the VMIG symbol to reflect such  characteristics as
payment upon periodic  demand rather than on fixed  maturity  dates and payments
relying on external liquidity.

    MIG  1/VMIG  1:  This  designation  denotes  best  quality.  There is strong
protection present through  established cash flows,  superior liquidity support,
or demonstrated broad-based access to the market for refinancing.

    MIG 2/VMIG 2: This denotes high quality.  Margins of  protection  are ample,
although not as large as in the preceding group.

DESCRIPTION OF MOODY'S INVESTORS SERVICE, INC.'S  COMMERCIAL PAPER RATINGS:

    Moody's  commercial  paper ratings are opinions of the ability of issuers to
punctually repay those promissory obligations that have an original maturity not
exceeding nine months. Moody's makes no representation that such obligations are
exempt from registration under the Securities Act of 1933, nor does it represent
that any  specific  note is a valid  obligation  of a rated  issuer or issued in
conformity with any applicable law. The following designations, all judged to be
investment  grade,  indicate the relative  repayment ability of rated issuers of
securities in which the funds may invest.

    PRIME  1:  Issuers  rated  "Prime  1" (or  supporting  institutions)  have a
superior ability for repayment of senior short-term promissory obligations.

    PRIME 2: Issuers rated "Prime 2" (or supporting  institutions) have a strong
ability for repayment of senior short-term promissory obligations.

DESCRIPTION OF STANDARD & POOR'S CORPORATION'S RATINGS FOR BONDS:

INVESTMENT GRADE

    AAA: Debt rated "AAA" has the highest rating  assigned by Standard & Poor's.
Capacity to pay interest and repay principal is extremely strong.

    AA: Debt rated "AA" has a very strong  capacity  to pay  interest  and repay
principal and differs from the highest-rated issues only in a small degree.

    A: Debt rated "A" has a strong capacity to pay interest and repay principal,
although it is somewhat more  susceptible  to the adverse  effects of changes in
circumstances and economic conditions than debt in higher-rated categories.

    BBB:  Debt rated "BBB" is  regarded  as having an  adequate  capacity to pay
interest and repay principal.  Whereas it normally exhibits adequate  protection
parameters,  adverse  economic  conditions  or changing  circumstances  are more
likely to lead to a weakened  capacity to pay interest and repay  principal  for
debt in this category than in higher-rated categories.

SPECULATIVE

    BB, B,  CCC,  CC:  Debt  rated in these  categories  is  regarded  as having
predominantly  speculative  characteristics  with  respect  to  capacity  to pay
interest and


18                                               AMERICAN CENTURY INVESTMENTS


repay  principal.  While such debt will likely have some quality and  protective
characteristics,  these are  outweighed  by large  uncertainties  or major  risk
exposures to adverse conditions.

    BB: Debt rated "BB" has less near-term  vulnerability  to default than other
speculative issues. However, it faces major ongoing uncertainties or exposure to
adverse  business,   financial,  or  economic  conditions  that  could  lead  to
inadequate  capacity to meet timely  interest and principal  payments.  The "BB"
rating  category  is also  used for debt  subordinated  to  senior  debt that is
assigned an actual or implied "BBB-" rating.

    B: Debt rated "B" has a greater  vulnerability  to default but currently has
the  capacity  to meet  interest  payments  and  principal  repayments.  Adverse
business,  financial,  or economic  conditions  will likely  impair  capacity or
willingness to pay interest and repay principal. The "B" rating category is also
used for debt  subordinated to senior debt that is assigned an actual or implied
"BB" or "BB-" rating.

    CCC: Debt rated "CCC" has a currently identifiable  vulnerability to default
and is dependent upon favorable business,  financial, and economic conditions to
meet timely  payment of interest  and  repayment of  principal.  In the event of
adverse business,  financial,  or economic conditions,  it is not likely to have
the capacity to pay interest and repay  principal.  The "CCC" rating category is
also used for debt  subordinated  to senior  debt that is  assigned an actual or
implied "B" or "B-" rating.

    CC: The rating "CC" typically is applied to debt subordinated to senior debt
that is assigned an actual or implied "CCC" debt rating.

    C: The "C" rating is typically  applied to debt  subordinated to senior debt
that is assigned an actual or implied "CCC-" debt rating.  The "C" rating may be
used to cover a situation where a bankruptcy  petition has been filed,  but debt
service payments are continued.

    CI: The "CI"  rating is  reserved  for income  bonds on which no interest is
being paid.

    D: Debt rated "D" is in default, and payment of interest and/or repayment of
principal is in arrears.

    PLUS (+) OR MINUS (-): The ratings from "AA" to "CCC" may be modified by the
addition  of a plus or minus  sign to show  relative  standing  within the major
rating categories.

DESCRIPTION  OF STANDARD & POOR'S  CORPORATION'S  RATINGS FOR  INVESTMENT  GRADE
NOTES AND SHORT-TERM DEMAND OBLIGATIONS:

    SP-1: Issues carrying this designation have a very strong or strong capacity
to pay principal and interest.  Those issues determined to possess  overwhelming
safety characteristics will be given a plus (+) designation.

    SP-2:  Issues carrying this designation have a satisfactory  capacity to pay
principal and interest.

DESCRIPTION OF STANDARD & POOR'S CORPORATION'S RATINGS FOR DEMAND OBLIGATIONS
AND COMMERCIAL PAPER:

    A Standard & Poor's  commercial paper rating is a current  assessment of the
likelihood of timely payment of debt having an original maturity of no more than
365 days. The two rating categories for securities in which the funds may invest
are as follows:

    A-1: This highest  category  indicates  that the degree of safety  regarding
timely payment is strong.  Those issues  determined to possess  extremely strong
safety characteristics are denoted with a plus (+) designation.

    A-2:  Capacity  for  timely  payment  on  issues  with this  designation  is
satisfactory.  However,  the  relative  degree  of  safety is not as high as for
issues designated "A-1."

   
FINANCIAL STATEMENTS

    The financial  statements of the funds,  including the  Statements of Assets
and  Liabilities  and the  Statements  of  Operations  for the fiscal year ended
February 28, 1998,  and the  Statements  of Changes in Net Assets for the fiscal
years ended  February 28, 1997,  and 1998,  are included in the Annual Report to
shareholders  for the fiscal year ended  February  28,  1998.  The report on the
financial highlights for the fiscal years 1994, 1995, 1996 and 1997 are included
in the Annual  Report to  shareholders  for the fiscal year ended  February  28,
1997.  Each such Annual  Report is  incorporated  herein by  reference.  You may
receive copies of the reports without charge upon request to American Century at
the address and phone number shown on the cover of this  Statement of Additional
Information.
    


STATEMENT OF ADDITIONAL INFORMATION                                         19


P.O. BOX 419200
KANSAS CITY, MISSOURI
64141-6200

INVESTOR SERVICES:
1-800-345-2021 or 816-531-5575

AUTOMATED INFORMATION LINE:
1-800-345-8765

TELECOMMUNICATIONS DEVICE FOR THE DEAF:
1-800-634-4113 or 816-444-3485

FAX: 816-340-7962

   
www.americancentury.com
    

                        [american century logo(reg. sm)]
                                    American
                                Century(reg.tm)

9806           [recycled logo]
SH-BKT-12446      Recycled
<PAGE>

AMERICAN CENTURY INVESTMENT TRUST


1933 Act Post-Effective Amendment No. 5
1940 Act Amendment No. 6
- --------------------------------------------------------------------------------

PART C   OTHER INFORMATION

Item 24. Financial Statements and Exhibits

(a)      FINANCIAL STATEMENTS. 

     (i) Financial Statements filed in Part A of Registration Statement:

          1.   Financial Highlights

          2.   Financial  Highlights  for the fiscal  years ended  February  28,
               1997,  February 29, 1996, February 28, 1995 and February 28, 1994
               are covered by the Independent  Accountants Report dated February
               24, 1997 which is incorporated  by reference to the  Registrant's
               Annual Report dated February 28, 1997.

     (ii) Financial  Statements  filed in Part B of the  Registration  Statement
          (each  of the  following  financial  statements  is  contained  in the
          Registrant's  Annual  Reports  dated  February  28,  1998,  which  are
          incorporated by reference in Part B of this Registration Statement):

          1.   Statement of Assets and Liabilities at February 28, 1998.

          2.   Statement of Operations for the year ended February 28, 1998.

          3.   Statement  of Changes in Net Assets for the years ended  February
               28, 1998 and 1997.

          4.   Notes to Financial Statements as of February 28, 1998.

          5.   Schedule of Investments as of February 28, 1998.

          6.   Independent Accountants' Report dated April 7, 1998.


(b)      EXHIBITS.

          (1)  (a)Amended and Restated Declaration of Trust, dated June 16, 1993
               and amended May 31, 1995, is incorporated  herein by reference to
               Exhibit 1 of  Post-Effective  Amendment  No. 3 filed on April 24,
               1996 (Accession # 0000908406-96-000004).

               (b)Amendment  to the  Declaration of Trust dated October 21, 1996
               is included herein.

               (c)  Amendment  to  Declaration  of Trust  dated  May 1,  1998 is
               included herein.

          (2)  Amended and  Restated  Bylaws  dated  March 9, 1998 are  included
               herein.

          (3)  Not applicable.

          (4)  Specimen  copy of American  Century - Benham  Prime Money  Market
               Fund's share  certificate is incorporated  herein by reference to
               Exhibit 4 of the Trust's Registration Statement filed on June 28,
               1993.

          (5)  (a)  Investor  Class  Investment   Management  Agreement  between
               American Century Investment Trust and American Century Investment
               Management,  Inc.,  dated  August  1,  1997  is  incorporated  by
               reference  to Exhibit 5 of  Post-Effective  Amendment  #33 to the
               Registration  Statement  of American  Century  Government  Income
               Trust, filed July 31, 1997 (Accession #773674-97-000014).

               (b)  Advisor  Class  Investment   Management   Agreement  between
               American Century Investment Trust and American Century Investment
               Management,  Inc., dated August 1, 1997 and amended as of June 1,
               1998 is included herein.

          (6)  Distribution  Agreement between American Century Investment Trust
               and  Funds   Distributor,   Inc.   dated   January  15,  1998  in
               incorporated  herein by reference to Exhibit 6 of  Post-Effective
               Amendment  No.  28  on  Form  N1-A  of  American  Century  Target
               Maturities Trust (File No. 2-94608).

          (7)  Not applicable.

          (8)  Custodian  Agreement  between  American  Century  and  The  Chase
               Manhattan Bank,  dated August 9, 1996, is incorporated  herein by
               reference  to  Exhibit 8 to  Post-Effective  Amendment  No. 31 of
               American  Century  Government  Income  Trust filed on February 7,
               1997 (Accession #773674-97-000002).

          (9)  Transfer Agency  Agreement  between  American  Century Investment
               Trust and American Century Services Corporation,  dated August 1,
               1997,  is  incorporated  herein  by  reference  to  Exhibit  9 of
               Post-Effective  Amendment #33 to the  Registration  Statement for
               American Century  Government Income Trust, filed on July 31, 1997
               (Accession #773674-97-000014).

          (10) Opinion  and  Consent  of  Counsel  as to  the  legality  of  the
               securities being registered dated April 23, 1998, is incorporated
               herein by  reference to Rule 24f-2 Notice filed on April 23, 1998
               (Accession #908406-98-000003).

          (11) (a)  Consent  of  Coopers & Lybrand  L.L.P.  (filed  herewith  as
               EX-99.B11a).

               (b) Consent of KPMG Peat Marwick LLP, independent auditors (filed
               herewith as EX-99.B11b).

          (12) (a) Annual  Report of the  Registrant  dated  February  28,  1998
               (filed electronically on April 24, 1998, File No. 33-65170).

               (b) Annual  Report of the  Registrant  dated  February  28,  1997
               (filed electronically on April 23, 1997, File No. 33-65170).

          (13) Letter  of  Understanding  relating  to  initial  capital,  dated
               October 4, 1993 is incorporated herein by reference to Exhibit 13
               of Pre-Effective Amendment No. 1 filed on October 6, 1993.

          (14) (a)American Century Individual Retirement Account Plan, including
               all  instructions  and other relevant  documents,  dated February
               1992, is incorporated herein by reference to Exhibit 14(a) of the
               Trust's Registration Statement filed on June 28, 1993.

               (b)American Century  Pension/Profit  Sharing Plan,  including all
               instructions and other relevant  documents,  dated February 1992,
               is  incorporated  herein by  reference  to  Exhibit  14(b) of the
               Trust's Registration Statement filed on June 28, 1993.

          (15) Not applicable.

          (16) Schedule for Computation of each performance  quotation  provided
               in response to Item 22 is included herein.

          (17) Power of Attorney dated January 15, 1998 is included herein.


Item 25. Persons Controlled by or Under Common Control with Registrant.

Not applicable.


Item 26. Number of Holders of Securities.

As of April 30,  1998,  American  Century - Benham  Prime Money Market Fund (the
sole  operating  series  of  American  Century   Investment  Trust)  had  54,875
shareholders of record.


Item 27. Indemnification.

As stated in Article VII,  Section 3 of the  Declaration of Trust,  incorporated
herein by reference to Exhibit 1 to the  Registration  Statement,  "The Trustees
shall be entitled  and  empowered  to the  fullest  extent  permitted  by law to
purchase  insurance  for and to  provide  by  resolution  or in the  Bylaws  for
indemnification  out  of  Trust  assets  for  liability  and  for  all  expenses
reasonably  incurred  or paid or  expected to be paid by a Trustee or officer in
connection  with any  claim,  action,  suit,  or  proceeding  in which he or she
becomes  involved by virtue of his or her capacity or former  capacity  with the
Trust.  The  provisions,  including any  exceptions and  limitations  concerning
indemnification,  may be set forth in detail  in the  Bylaws or in a  resolution
adopted by the Board of Trustees."

Registrant hereby  incorporates by reference,  as though set forth fully herein,
Article VI of the  Registrant's  Bylaws,  amended on May 17, 1995,  appearing as
Exhibit 2 of Post-Effective Amendment No. 3 filed on April 24, 1996 (Accession #
908406-96-000004).

The  Registrant  has  purchased  an insurance  policy  insuring its officers and
directors  against  certain  liabilities  which such  officers and directors may
incur  while  acting  in such  capacities  and  providing  reimbursement  to the
Registrant for sums which it may be permitted or required to pay to its officers
and directors by way of  indemnification  against such  liabilities,  subject in
either case to clauses respecting deductibility and participation.


Item 28. Business and Other Connections of Investment Advisor.

American Century Investment Management,  Inc., the investment manager to each of
the Registrant's  Funds, is engaged in the business of managing  investments for
deferred compensation plans and other institutional investors.


Item 29. Principal Underwriters.

(a) Funds Distributor,  Inc. (the "Distributor")  acts as principal  underwriter
for the following investment companies.

               American Century California Tax-Free and Municipal Funds
               American Century Capital Portfolios, Inc.
               American Century Government Income Trust
               American Century International Bond Funds
               American Century Investment Trust
               American Century Municipal Trust
               American Century Mutual Funds, Inc.
               American Century Premium Reserves, Inc.
               American Century Quantitative Equity Funds
               American Century Strategic Asset Allocations, Inc.
               American Century Target Maturities Trust
               American Century Variable Portfolios, Inc.
               American Century World Mutual Funds, Inc.
               BJB Investment Funds
               The Brinson Funds
               Dresdner RCM Capital Funds, Inc.
               Dresdner RCM Equity Funds, Inc.
               Harris Insight Funds Trust
               HT Insight Funds, Inc. d/b/a Harris Insight Funds
               J.P. Morgan Institutional Funds
               J.P. Morgan Funds
               The JPM Series Trust
               The JPM Series Trust II
               LaSalle Partners Funds, Inc.
               Monetta Fund, Inc.
               Monetta Trust
               The Montgomery Funds
               The Montgomery Funds II
               The Munder Framlington Funds Trust
               The Munder Funds Trust
               The Munder Funds, Inc.
               Orbitex Group of Funds
               St. Clair Funds, Inc.
               The Skyline Funds
               Waterhouse Investors Family of Funds, Inc.
               WEBS Index Fund, Inc.

     The Distributor is registered  with the Securities and Exchange  Commission
     as  a  broker-dealer  and  is a  member  of  the  National  Association  of
     Securities  Dealers.  The Distributor is located at 60 State Street,  Suite
     1300,  Boston,   Massachusetts   02109.  The  Distributor  is  an  indirect
     wholly-owned  subsidiary  of Boston  Institutional  Group,  Inc., a holding
     company all of whose outstanding shares are owned by key employees.

(b) The following is a list of the executive officers, directors and partners of
the Distributor:

<TABLE>
Name and Principal Business          Positions and Offices with          Positions and Offices with
Address*                             Underwriter                         Registrant

<S>                                 <C>                                 <C>
Marie E. Connolly                    Director, President and Chief       none
                                     Executive Officer

Richard W. Ingram                    Executive Vice President            President, Principal Executive
                                                                         and Principal Financial Officer

Donald R. Roberson                   Executive Vice President            none

William S. Nichols                   Executive Vice President            none

Michael S. Petrucelli                Senior Vice President               none

Joseph F. Tower, III                 Director, Senior Vice President,    none
                                     Treasurer and Chief Financial
                                     Officer

Paula R. David                       Senior Vice President               none

Allen B. Closser                     Senior Vice President               none

Bernard A. Whalen                    Senior Vice President               none

William J. Nutt                      Director                            none
- --------------------
* All addresses are 60 State Street, Suite 1300, Boston, Massachusetts 02109
</TABLE>

(c) Not applicable.


Item 30. Location of Accounts and Records.

American Century Investment Management,  Inc., the Registrant, and its agent for
transfer and  administrative  services,  American Century Services  Corporation,
maintains  their  principal  office  at 4500 Main St.,  Kansas  City,  MO 64111.
American  Century Services  Corporation  maintains  physical  possession of each
account,  book,  or other  document,  and  shareholder  records as  required  by
ss.31(a) of the 1940 Act and rules thereunder.


Item 31. Management Services.

Not applicable.


Item 32. Undertakings.

a.   Not Applicable.

b.   Not Applicable.

c.   Registrant hereby undertakes to furnish each person to whom a prospectus is
     delivered a copy of Registrant's latest annual report to shareholders, upon
     request and without charge.

d.   Registrant  hereby  undertakes  that it will,  if requested to do so by the
     holders  of at least 10% of the  Registrant's  outstanding  shares,  call a
     meeting of shareholders  for the purpose of voting upon the question of the
     removal  of  a  director  and  to  assist  in   communication   with  other
     shareholders as required by Section 16(c).

<PAGE>
                                   SIGNATURES

Pursuant to the  requirements  of the  Securities Act of 1933 and the Investment
Company  Act of  1940,  the  Registrant  has  duly  caused  this  Post-Effective
Amendment No.  6/Amendment No. 7 to be signed on its behalf by the  undersigned,
thereunto  duly  authorized,  in  the  City  of  Mountain  View,  and  State  of
California,  on the 29th day of May,  1998. I hereby certify that this Amendment
meets the requirements for immediate effectiveness pursuant to Rule 485(b).

                            AMERICAN CENTURY INVESTMENT TRUST

                            By: /s/ Patrick A. Looby
                                Patrick A. Looby
                                Vice President

Pursuant to the requirements of the Securities Act of 1933, this  Post-Effective
Amendment No.  6/Amendment No. 7 has been signed below by the following  persons
in the capacities and on the dates indicated.
<TABLE>
<CAPTION>
                                                                      Date
<S>                                  <C>                                    <C>
*Richard W. Ingram                   President, Principal        May 12, 1998
- ---------------------------------    Executive and Principal
Richard W. Ingram                    Financial Officer

*Maryanne Roepke                     Vice President, Treasurer   May 12, 1998
- ---------------------------------    and Principal Accounting
Maryanne Roepke                      Officer

*Albert A. Eisenstat                 Director                    May 12, 1998
- ---------------------------------
Albert A. Eisenstat

*Ronald J. Gilson                    Director                    May 12, 1998
- ---------------------------------
Ronald J. Gilson

*William M. Lyons                    Director                    May 12, 1998
- ---------------------------------
William M. Lyons

*Myron S. Scholes                    Director                    May 12, 1998
- ---------------------------------
Myron S. Scholes

*Kenneth E. Scott                    Director                    May 12, 1998
- ---------------------------------
Kenneth E. Scott

*Isaac Stein                         Director                    May 12, 1998
- ---------------------------------
Isaac Stein

*James E. Stowers III                Director                    May 12, 1998
- ---------------------------------
James E. Stowers III

*Jeanne D. Wohlers                   Director                    May 12, 1998
- ---------------------------------
Jeanne D. Wohlers
</TABLE>

*By /s/ Patrick A. Looby
     Patrick A. Looby
     Attorney-in-Fact


EXHIBIT     DESCRIPTION

EX-99.B1a   Amended and Restated  Declaration of Trust,  dated June 16, 1993 and
            amended May 31, 1995, is incorporated herein by reference to Exhibit
            1 of  Post-Effective  Amendment  No.  3  filed  on  April  24,  1996
            (Accession # 0000908406-96-000004).

EX-99.B1b   Amendment  to the  Declaration  of Trust  dated  October 21, 1996 is
            incorporated  herein by  reference  to  Exhibit 1 of  Post-Effective
            Amendment No. 5 filed on June 27, 1997.

EX-99.B1c   Amendment to the  Declaration of Trust dated May 1, 1998 is included
            herein.

EX-99.B2    Amended  and  Restated  Bylaws,  dated March 9, 1998,  are  included
            herein.

EX-99.B4    Specimen copy of American  Century - Prime Money Market Fund's share
            certificate is incorporated  herein by reference to Exhibit 4 of the
            Trust's Registration Statement filed on June 28, 1993.

EX-99.B5a   Investment  Advisory  Agreement between American Century  Investment
            Trust and American Century Investment Management, Inc., dated August
            1,  1997,  is  incorporated  herein  by  reference  to  Exhibit 5 of
            Post-Effective  Amendment  No. 33 to the  Registration  Statement of
            American  Century  Government  Income Trust,  filed on July 31, 1997
            (Accession # 0000773674-97-000014).

EX-99.B5b   Advisor  Class  Investment  Management  Agreement  between  American
            Century Investment Trust and American Century Investment Management,
            Inc.,  dated  August  1,  1997  and  amended  as of June 1,  1998 is
            included herein.

EX-99.B6    Distribution Agreement between American Century Investment Trust and
            Funds  Distributor,  Inc.  dated  January 15,  1998 is  incorporated
            herein by reference to Exhibit 6 of Post-Effective  Amendment No. 28
            on Form N1-A of American  Century Target  Maturities Trust (File No.
            2-94608).

EX-99.B8    Custodian  Agreement  between American Century  Investment Trust and
            The Chase  Manhattan  Bank,  dated August 9, 1996,  is  incorporated
            herein by reference to Exhibit 8 to Post-Effective  Amendment No. 31
            of American  Century  Government  Income  Trust filed on February 7,
            1997 (Accession #773674-97-000002).

EX-99.B9    Administrative   Services  and  Transfer  Agency  Agreement  between
            American  Century  Investment  Trust and American  Century  Services
            Corporation  dated as of August 1, 1997, is  incorporated  herein by
            reference  to Exhibit 9 of  Post-Effective  Amendment  No. 33 to the
            Registration  Statement of the American  Century  Government  Income
            Trust filed on July 31, 1997 (Accession # 773674-97-000014).

EX-99.B10   Opinion and consent of counsel as to the legality of the  securities
            being  registered,  dated April 23, 1998 is  incorporated  herein by
            reference to Rule 24f-2 Notice filed on April 23, 1998  (Accession #
            908406-98-000003).

EX-99.B11a  Consent of Coopers & Lybrand  L.L.P.,  independent  accountants,  is
            included herein.

EX-99.B11b  Consent of KPMG Peat Marwick LLP, independent  auditors, is included
            herein.

EX-99.B12a  Annual Report of the Registrant dated February 28, 1998 (filed April
            24, 1998, File No. 33-65170).

EX-99.B12b  Annual Report of the Registrant dated February 28, 1997 (filed April
            23, 1997).

EX-99.B13   Letter of Understanding  relating to initial capital,  dated October
            4,  1993 is  incorporated  herein  by  reference  to  Exhibit  13 of
            Pre-Effective Amendment No. 1 filed on October 6, 1993.

EX-99.B14   a) American Century Individual  Retirement  Account Plan,  including
            all instructions and other relevant documents,  dated February 1992,
            is incorporated  herein by reference to Exhibit 14(a) of the Trust's
            Registration Statement filed on June 28, 1993.

            b) American  Century  Pension/Profit  Sharing  Plan,  including  all
            instructions and other relevant  documents,  dated February 1992, is
            incorporated  herein by  reference  to Exhibit  14(b) of the Trust's
            Registration Statement filed on June 28, 1993.

EX-99.B16   Schedule for computation of each performance  quotation  provided in
            response to Item 22 is included herein.

EX-99.B17   Power of Attorney  dated January 15, 1998 is included herein.

EX-27.4     FDS - Benham Prime Money Market Fund.

                                 AMENDMENT NO. 2
                                     TO THE
                              DECLARATION OF TRUST
                                       OF

                        AMERICAN CENTURY INVESTMENT TRUST

                              Effective May 1, 1998

         WHEREAS,  Section  5(a) of  Article  III of the  Declaration  of  Trust
provides that the Trustees may establish and designate a new Series of Shares or
class of a Series to be effective  upon  execution by a majority of the Trustees
of an instrument setting forth the new names;

         WHEREAS, the Trustees have determined that it is appropriate and in the
interests  of the  Trust to  establish  a new  class of  Series  of Shares to be
designated  as  "American  Century - Benham  Prime  Money  Market  Fund--Advisor
Class";

         RESOLVED,  that Article III,  Section 8 of the Declaration of Trust for
the American Century Government Income Trust is hereby amended as follows:

                  Section 8. Trustees'  Establishment and Designation of Series.
                  --------------------------------------------------------------
         The  Board of  Trustees  hereby  establishes  and  designates  American
         Century--Benham Prime Money Market Fund as Series of the Trust with the
         relative  rights and  preferences  as described in Section 6 of Article
         III. The fund shall further be divided into two classes: Investor Class
         and Advisor  Class,  and have such rights and  preferences as indicated
         for such classes in the Multiple Class Plan.

         RESOLVED FURTHER, that the assets and liabilities of the Trust shall be
allocated  among the series of the Trust as set forth in Article III,  Section 6
of the Declaration of Trust.

<TABLE>
Trustees of the Benham Government Income Trust

<S>                                       <C>               <C>                                      <C>
/s/ Albert A. Eisenstat                   5/1/98            /s/ Kenneth E. Scott                      5/1/98
- ----------------------------------------  -------------     ----------------------------------------  ------
Albert A. Eisenstat*                      Date              Kenneth E. Scott*                         Date

/s/ Ronald J. Gilson                      5/1/98            /s/ Isaac Stein                           5/1/98
- ----------------------------------------  -------------     ----------------------------------------  ------
Ronald J. Gilson*                         Date              Isaac Stein*                              Date

/s/ William M. Lyons                      5/1/98            /s/ James E. Stowers III                  5/1/98
- ----------------------------------------  -------------     ----------------------------------------  ------
William M. Lyons*                                           James E. Stowers III*                     Date

/s/ Myron S. Scholes                      5/1/98            /s/ Jeanne D. Wohlers                     5/1/98
- ----------------------------------------  -------------     ----------------------------------------  ------
Myron S. Scholes*                         Date              Jeanne D. Wohlers*                        Date


*By:   /s/Douglas A. Paul                                                                 Date:  May 1, 1998
       -------------------------------------------------------------------------
       Douglas A. Paul, Esq.
       Pursuant to Power of Attorney dated January 15, 1998
</TABLE>

            AMERICAN CENTURY CALIFORNIA TAX-FREE AND MUNICIPAL FUNDS
                    AMERICAN CENTURY GOVERNMENT INCOME TRUST
                    AMERICAN CENTURY INTERNATIONAL BOND FUNDS
                        AMERICAN CENTURY INVESTMENT TRUST
                        AMERICAN CENTURY MUNICIPAL TRUST
                    AMERICAN CENTURY TARGET MATURITIES TRUST


                                     Bylaws
                            as amended March 9, 1998

                                Table of Contents

ARTICLE I Offices..............................................................1
     Section 1.  Principal Office..............................................1
     Section 2.  Other Offices.................................................1

ARTICLE II Meetings of Shareholders............................................1
     Section 1.  Place of Meetings.............................................1
     Section 2.  Call of Meeting...............................................1
     Section 3.  Notice of Shareholders' Meeting...............................1
     Section 4.  Manner of Giving Notice; Affidavit of Notice..................2
     Section 5.  Adjourned Meeting; Notice.....................................2
     Section 6.  Voting........................................................3
     Section 7.  Waiver of Notice By Consent of Absent Shareholders............3
     Section 8.  Shareholder Action By Written Consent Without A Meeting.......3
     Section 9.  Record Date for Shareholder Notice, Voting and Giving 
                 Consents......................................................4
     Section 10. Proxies.......................................................4
     Section 11. Inspectors of Election........................................5

ARTICLE III Trustees...........................................................5
     Section 1.  Powers........................................................5
     Section 2.  Number And Qualification Of Trustees..........................5
     Section 3.  Vacancies.....................................................6
     Section 4.  Place of Meetings and Meetings by Telephone...................6
     Section 5.  Regular Meetings..............................................6
     Section 6.  Special Meetings..............................................6
     Section 7.  Quorum........................................................7
     Section 8.  Waiver of Notice..............................................7
     Section 9.  Adjournment...................................................7
     Section 10. Notice of Adjournment.........................................7
     Section 11. Action Without A Meeting......................................7
     Section 12. Fees and Compensation of Trustees.............................8

ARTICLE IV Committees..........................................................8
     Section 1.  Committees of Trustees........................................8
     Section 2.  Meetings and Action of Committees.............................8

ARTICLE V Officers.............................................................9
     Section 1.  Officers......................................................9
     Section 2.  Election of Officers..........................................9
     Section 3.  Subordinate Officers..........................................9
     Section 4.  Removal and Resignation of Officers...........................9
     Section 5.  Vacancies In Offices..........................................9
     Section 6.  Chairman of the Board........................................10
     Section 7.  President....................................................10
     Section 8.  Vice Presidents..............................................10
     Section 9.  Secretary....................................................10
     Section 10. Chief Financial Officer......................................11

ARTICLE VI Indemnification of Trustees, Officers, Employees and 
                 Other Agents.................................................11
     Section 1.  Agents, Proceedings and Expenses.............................11
     Section 2.  Actions Other Than By Trust..................................11
     Section 3.  Actions By The Trust.........................................12
     Section 4.  Exclusion of Indemnification.................................12
     Section 5.  Successful Defense By Agent..................................12
     Section 6.  Required Approval............................................12
     Section 7.  Advance of Expenses..........................................13
     Section 8.  Other Contractual Rights.....................................13
     Section 9.  Limitations..................................................13
     Section 10. Insurance....................................................13
     Section 11. Fiduciaries of Employee Benefit Plan.........................14

ARTICLE VII Records and Reports...............................................14
     Section 1.  Maintenance and Inspection of Share Register.................14
     Section 2.  Maintenance and Inspection of Bylaws.........................14
     Section 3.  Maintenance and Inspection of Other Records..................14
     Section 4.  Inspection by Trustees.......................................14
     Section 5.  Financial Statements.........................................15

ARTICLE VIII General Matters..................................................15
     Section 1.  Checks, Drafts, Evidence of Indebtedness.....................15
     Section 2.  Contracts and Instruments; How Executed......................15
     Section 3.  Certificates for Shares......................................15
     Section 4.  Lost Certificates............................................16
     Section 5.  Representation of Shares of Other Entities...................16

ARTICLE IX Amendments.........................................................16
     Section 1.  Amendment by Shareholders....................................16
     Section 2.  Amendment By Trustees........................................16



<PAGE>
            AMERICAN CENTURY CALIFORNIA TAX-FREE AND MUNICIPAL FUNDS
                    AMERICAN CENTURY GOVERNMENT INCOME TRUST
                    AMERICAN CENTURY INTERNATIONAL BOND FUNDS
                        AMERICAN CENTURY INVESTMENT TRUST
                        AMERICAN CENTURY MUNICIPAL TRUST
                    AMERICAN CENTURY TARGET MATURITIES TRUST


                                     Bylaws
                            as amended March 9, 1998

                                    ARTICLE I
                                     Offices

Section 1.  Principal Office
The Board of Trustees shall fix the location of the principal  executive  office
of the Trust at any place within or outside The Commonwealth of Massachusetts.


Section 2.  Other Offices
The Board of Trustees may at any time establish branch or subordinate offices at
any place or places where the trust intends to do business.


                                   ARTICLE II
                            Meetings of Shareholders

Section 1.  Place of Meetings
Meetings  of  shareholders  shall be held at any  place  within or  outside  The
Commonwealth  of  Massachusetts  designated  by the  Board of  Trustees.  In the
absence of any such  designation,  shareholders'  meetings  shall be held at the
principal executive office of the Trust.


Section 2.  Call of Meeting
A meeting of the shareholders may be called at any time by the Board of Trustees
or by the chairman of the Board or by the president.


Section 3.  Notice of Shareholders' Meeting
All notices of  meetings of  shareholders  shall be sent or  otherwise  given in
accordance  with  Section 4 of this  Article  II not less than ten (10) nor more
than  seventy-five  (75) days before the date of the  meeting.  The notice shall
specify (i) the place, date and hour of the meeting, and (ii) the general nature
of the business to be  transacted.  The notice of any meeting at which  trustees
are to be elected also shall include the name of any nominee or nominees whom at
the time of the notice are intended to be presented for election.

If action is proposed to be taken at any meeting for  approval of (i) a contract
or transaction in which a trustee has a direct or indirect  financial  interest,
(ii) an amendment of the  Declaration of Trust,  (iii) a  reorganization  of the
Trust, or (iv) a voluntary dissolution of the Trust, the notice shall also state
the general nature of that proposal.


Section 4.  Manner of Giving Notice; Affidavit of Notice
Notice of any meeting of  shareholders  shall be given either  personally  or by
first-class mail or telegraphic or other written communication, charges prepaid,
addressed to the shareholder at the address of that shareholder appearing on the
books of the  Trust or its  transfer  agent or given by the  shareholder  to the
Trust for the purpose of notice. If no such address appears on the Trust's books
or is  given,  notice  shall  be  deemed  to  have  been  given  if sent to that
shareholder by first-class mail or telegraphic or other written communication to
the Trust's  principal  executive  office,  or if  published  at least once in a
newspaper  of general  circulation  in the county  where that office is located.
Notice shall be deemed to have been given at the time when delivered  personally
or  deposited  in the  mail  or sent by  telegram  or  other  means  of  written
communication.

If any notice  addressed  to a  shareholder  at the address of that  shareholder
appearing  on the books of the  Trust is  returned  to the  Trust by the  United
States Postal  Service  marked to indicate that the Postal  Service is unable to
deliver the notice to the  shareholder  at the  address,  all future  notices or
reports shall be deemed to have been duly given without further mailing if these
shall be available to the  shareholder on written  demand of the  shareholder at
the  principal  executive  office of the Trust for a period of one year from the
date of the giving of the notice.

An  affidavit  of the  mailing  or  other  means of  giving  any  notice  of any
shareholder's meeting shall be executed by the secretary, assistant secretary or
any  transfer  agent of the  Trust  giving  the  notice  and  shall be filed and
maintained in the minute book of the Trust.


Section 5.  Adjourned Meeting; Notice
Any shareholder's meeting,  whether or not a quorum is present, may be adjourned
from time to time by the vote of the majority of the shares  represented at that
meeting, either in person or by proxy.

When any meeting of shareholders  is adjourned to another time or place,  notice
need not be given of the adjourned  meeting at which the  adjournment  is taken,
unless a new  record  date of the  adjourned  meeting  is fixed  or  unless  the
adjournment  is for more than sixty (60) days from the date set for the original
meeting,  in which case the Board of Trustees shall set a new record date. Where
required,  notice  of  any  such  adjourned  meeting  shall  be  given  to  each
shareholder  of record  entitled to vote at the adjourned  meeting in accordance
with the  provisions  of Section 3 and 4 of this  Article  II. At any  adjourned
meeting, the Trust may transact any business which might have been transacted at
the original meeting.


Section 6.  Voting
The  shareholders  entitled  to vote at any  meeting  of  shareholders  shall be
determined in accordance  with the provisions of the Declaration of Trust, as in
effect at such time. The  shareholders'  vote may be by voice vote or by ballot,
provided,  however, that any election for trustees must be by ballot if demanded
by any  shareholder  before  the voting  has  begun.  On any  matter  other than
elections of trustees,  any  shareholder may vote part of the shares in favor of
the proposal and refrain from voting the  remaining  shares or vote them against
the proposal, but if the shareholder fails to specify the number of shares which
the shareholder is voting  affirmatively,  it will be conclusively presumed that
the  shareholder's  approving  vote is with respect to the total shares that the
shareholder is entitled to vote on such proposal.


Section 7.  Waiver of Notice By Consent of Absent Shareholders
The transactions of the meeting of shareholders,  however called and noticed and
wherever  held,  shall be as valid as though  had at a meeting  duly held  after
regular call and notice if a quorum be present  either in person or by proxy and
if either before or after the meeting,  each person entitled to vote who was not
present in person or by proxy signs a written waiver of notice or a consent to a
holding of the meeting or an approval  of the  minutes.  The waiver of notice or
consent need not specify  either the business to be transacted or the purpose of
any meeting of shareholders.

Attendance by a person at a meeting shall also  constitute a waiver of notice of
that meeting,  except when the person objects at the beginning of the meeting to
the  transaction of any business  because the meeting is not lawfully  called or
convened and except that attendance at a meeting is not a waiver of any right to
object to the consideration of matters not included in the notice of the meeting
if that objection is expressly made at the beginning of the meeting.


Section 8.  Shareholder Action By Written Consent Without A Meeting
Any  action  which  may be taken at any  meeting  of  shareholders  may be taken
without a meeting and without prior notice if a consent in writing setting forth
the action so taken is signed by the holders of  outstanding  shares  having not
less than the minimum  number of votes that would be  necessary  to authorize or
take that  action at a meeting  at which  all  shares  entitled  to vote on that
action  were  present  and  voted.  All such  consents  shall be filed  with the
Secretary  of the Trust and shall be  maintained  in the  Trust's  records.  Any
shareholder  giving a written  consent or the  shareholder's  proxy holders or a
transferee  of the shares or a personal  representative  of the  shareholder  or
their  respective  proxy holders may revoke the consent by a writing received by
the  Secretary  of the Trust  before  written  consents  of the number of shares
required to authorize the proposed action have been filed with the Secretary.

If the consents of all shareholders  entitled to vote have not been solicited in
writing and if the unanimous written consent of all such shareholders  shall not
have been  received,  the  Secretary  shall  give  prompt  notice of the  action
approved by the  shareholders  without a meeting.  This notice shall be given in
the manner specified in Section 4 of this Article II. In the case of approval of
(i)  contracts  or  transactions  in which a trustee  has a direct  or  indirect
financial  interest,  (ii)  indemnification  of agents of the Trust, and (iii) a
reorganization  of the Trust,  the notice  shall be given at least ten (10) days
before the consummation of any action authorized by that approval.


Section 9.  Record Date for Shareholder Notice, Voting and Giving Consents
For purposes of determining the  shareholders  entitled to notice of any meeting
or to vote or entitled to give consent to action without a meeting, the Board of
Trustees  may fix in  advance  a  record  date  which  shall  not be  more  than
seventy-five  (75) days nor less than ten (10) days  before the date of any such
meeting as provided in the Declaration of Trust.

If the Board of Trustees does not so fix a record date:

(a)      The record date for determining  shareholders  entitled to notice of or
         to vote at a meeting of shareholders  shall be at the close of business
         on the business day next  preceding the day on which notice is given or
         if notice is waived,  at the close of business on the business day next
         preceding the day on which the meeting is held.

(b)      The record date for determining  shareholders  entitled to give consent
         to action in writing without a meeting, (i) when no prior action by the
         Board of Trustees  has been taken,  shall be the day on which the first
         written  consent is given,  or (ii) when  prior  action of the Board of
         Trustees  has been taken,  shall be at the close of business on the day
         on which the Board of Trustees  adopt the  resolution  relating to that
         action or the  seventy-fifth  day before the date of such other action,
         whichever is later.


Section 10.  Proxies
Every person entitled to vote for trustees or on any other matter shall have the
right to do so either in person or by one or more agents authorized by a written
proxy signed by the person and filed with the  Secretary  of the Trust.  A proxy
shall be deemed signed if the shareholder's name is placed on the proxy (whether
by manual signature, typewriting,  telegraphic transmission or otherwise) by the
shareholder  or the  shareholder's  attorney-in-fact.  A validly  executed proxy
which does not state that it is  irrevocable  shall  continue  in full force and
effect unless (i) revoked by the person executing it before the vote pursuant to
that proxy by a writing delivered to the Trust stating that the proxy is revoked
or by a subsequent  proxy executed by or attendance at the meeting and voting in
person by the person  executing that proxy;  or (ii) written notice of the death
or  incapacity  of the maker of that proxy is received  by the Trust  before the
vote pursuant to that proxy is counted; provided however, that no proxy shall be
valid  after the  expiration  of eleven  (11)  months from the date of the proxy
unless otherwise  provided in the proxy. The revocability of a proxy that states
on its face that it is  irrevocable  shall be governed by the  provisions of the
California General Corporation Law.


Section 11.  Inspectors of Election
Before any  meeting of  shareholders,  the Board of  Trustees  may  appoint  any
persons  other than  nominees for office to act as inspectors of election at the
meeting or its adjournment.  If no inspectors of election are so appointed,  the
chairman  of the  meeting  may  and  on the  request  of  any  shareholder  or a
shareholder's  proxy shall,  appoint inspectors of election at the meeting.  The
number of  inspectors  shall be either one (1) or three (3). If  inspectors  are
appointed  at a meeting on the request of one or more  shareholders  or proxies,
the  holders of a majority  of shares or their  proxies  present at the  meeting
shall determine whether one (1) or three (3) inspectors are to be appointed.  If
any person  appointed as  inspector  fails to appear or fails or refuses to act,
the  chairman  of the meeting  may and on the  request of any  shareholder  or a
shareholder's proxy, shall appoint a person to fill the vacancy.

These inspectors shall:

(a)      Determine  the number of shares  outstanding  and the  voting  power of
         each, the shares represented at the meeting,  the existence of a quorum
         and the authenticity, validity and effect of proxies;

(b)      Receive votes, ballots or consents;

(c)      Hear and determine all  challenges  and questions in any way arising in
         connection with the right to vote;

(d)      Count and tabulate all votes or consents;

(e)      Determine when the polls shall close;

(f)      Determine the result; and

(g)      Do any other acts that may be proper to conduct  the  election  or vote
         with fairness to all shareholders.


                                   ARTICLE III
                                    Trustees

Section 1.  Powers
Subject  to the  applicable  provisions  of the  Declaration  of Trust and these
Bylaws relating to action required to be approved by the  shareholders or by the
outstanding  shares,  the business and affairs of the Trust shall be managed and
all  powers  shall  be  exercised  by or under  the  direction  of the  Board of
Trustees.


Section 2.  Number And Qualification Of Trustees
The  authorized  number  of  trustees  shall be not less than 7 nor more than 11
until changed by a duly adopted  amendment to the Declaration of Trust and these
Bylaws.  The selection and  nomination of  disinterested  directors is committed
solely to the  discretion  of a Nominating  Committee  consisting of all sitting
disinterested  directors  except where the  remaining  director or directors are
interested persons.


Section 3.  Vacancies
Vacancies in the Board of Trustees may be filled by a majority of the  remaining
trustees,  though less than a quorum, or by a sole remaining trustee, unless the
Board of Trustees calls a meeting of  shareholders  for the purposes of electing
trustees.  In the event  that at any time less than a majority  of the  trustees
holding  office at that time were so elected by the  holders of the  outstanding
voting  securities of the Trust,  the Board of Trustees shall forthwith cause to
be held as promptly as  possible,  and in any event  within  sixty (60) days,  a
meeting  of such  holders  for the  purpose  of  electing  trustees  to fill any
existing  vacancies in the Board of Trustees,  unless such period is extended by
order of the United States Securities and Exchange Commission.


Section 4.  Place of Meetings and Meetings by Telephone
All meetings of the Board of Trustees may be held at any place within or outside
The Commonwealth of Massachusetts  that has been designated from time to time by
resolution of the Board. In the absence of such a designation,  regular meetings
shall be held at the  principal  executive  office of the  Trust.  Any  meeting,
regular or special, may be held by conference telephone or similar communication
equipment,  so long as all  trustees  participating  in the meeting can hear one
another  and all such  trustees  shall be deemed to be  present in person at the
meeting;  provided  that, in accordance  with the  provisions of the  Investment
Company Act of 1940,  the Board may not  transact by such a meeting any business
which  involves the entering into, or the approval,  performance,  or renewal of
any contract or agreement, whereby a person undertakes regularly to serve or act
as the Fund's Investment Advisor or principal underwriter.


Section 5.  Regular Meetings
Regular  meetings of the Board of Trustees  shall be held  without  call at such
time as shall from time to time be fixed by the Board of Trustees.  Such regular
meetings may be held without notice.


Section 6.  Special Meetings
Special  meetings  of the Board of Trustees  for any purpose or purposes  may be
called at any time by the  chairman  of the board or the  president  or any vice
president or the secretary or any two (2) trustees.

Notice of the time and place of special  meetings shall be delivered  personally
or by telephone to each trustee or sent by first-class mail or telegram, charges
prepaid,  addressed to each trustee at that trustee's  address as it is shown on
the records of the Trust. In case the notice is mailed, it shall be deposited in
the United  States mail at least four (4) days before the time of the holding of
the meeting.  In case the notice is delivered  personally  or by telephone or to
the telegraph company,  it shall be given at least forty-eight (48) hours before
the time of the holding of the meeting.  Any oral notice given  personally or by
telephone may be communicated either to the trustee or to a person at the office
of the  trustee  who the person  giving  the  notice has reason to believe  will
promptly  communicate it to the trustee. The notice need not specify the purpose
of the  meeting  or the  place  if the  meeting  is to be held at the  principal
executive office of the Trust.


Section 7.  Quorum
A majority of the authorized  number of trustees  shall  constitute a quorum for
the transaction of business, except to adjourn as provided in Section 10 of this
Article  III.  Every act or decision  done or made by a majority of the trustees
present at a meeting duly held at which a quorum is present shall be regarded as
the act of the Board of Trustees,  subject to the provisions of the  Declaration
of Trust.  A meeting at which a quorum is  initially  present  may  continue  to
transact business notwithstanding the withdrawal of trustees if any action taken
is approved by at least a majority of the required quorum for that meeting.


Section 8.  Waiver of Notice
Notice of any  meeting  need not be given to any  trustee  who either  before or
after the  meeting  signs a written  waiver of notice,  a consent to holding the
meeting or an approval of the minutes.  The waiver of notice of consent need not
specify the purpose of the meeting.  All such  waivers,  consents and  approvals
shall be filed with the  records  of the Trust or made a part of the  minutes of
the meeting.  Notice of a meeting  shall also be deemed given to any trustee who
attends the meeting without protesting before or at its commencement the lack of
notice to that trustee.


Section 9.  Adjournment
A majority of the trustees  present,  whether or not constituting a quorum,  may
adjourn any meeting to another time and place.


Section 10.  Notice of Adjournment
Notice of the time and place of holding an  adjourned  meeting need not be given
unless the meeting is adjourned for more than  forty-eight  (48) hours, in which
case  notice  of the  time and  place  shall  be  given  before  the time of the
adjourned  meeting in the manner  specified  in Section 6 of this Article III to
the trustees who were present at the time of the adjournment.


Section 11.  Action Without A Meeting
Any action  required or  permitted  to be taken by the Board of Trustees  may be
taken  without a meeting if a majority  of the  members of the Board of Trustees
shall individually or collectively  consent in writing to that action;  provided
that,  in  accordance  with the  Investment  Company Act of 1940,  such  written
consent does not approve the entering into, or the renewal or performance of any
contract or agreement,  whereby a person undertakes regularly to serve or act as
the Fund's  Investment  Advisor or  principal  underwriter.  Any other action by
written  consent  shall have the same force and effect as a majority vote of the
Board of  Trustees.  Written  consents  shall be filed  with the  minutes of the
proceedings of the Board of Trustees.


Section 12.  Fees and Compensation of Trustees
Trustees and members of committees  may receive such  compensation,  if any, for
their services and such  reimbursement of expenses as may be fixed or determined
by resolution  of the Board of Trustees.  This Section 12 shall not be construed
to preclude  any  trustee  from  serving  the Trust in any other  capacity as an
officer,  agent,  employee or otherwise  and  receiving  compensation  for those
services.


                                   ARTICLE IV
                                   Committees

Section 1.  Committees of Trustees
The Board of Trustees may by resolution  adopted by a majority of the authorized
number of trustees designate one or more committees,  each consisting of two (2)
or more trustees, to serve at the pleasure of the Board. The Board may designate
one or more  trustees as alternate  members of any committee who may replace any
absent  member at any  meeting of the  committee.  Any  committee  to the extent
provided in the resolution of the Board,  shall have the authority of the Board,
except with respect to:

(a)      the approval of any action  which under  applicable  law also  requires
         shareholders'  approval  or  approval  of the  outstanding  shares,  or
         requires  approval by a majority of the entire Board or certain members
         of said Board;

(b)      the filling of vacancies on the Board of Trustees or in any committee;

(c)      the fixing of  compensation of the trustees for serving on the Board of
         Trustees or on any committee;

(d)      the amendment or repeal of the Declaration of Trust or of the Bylaws or
         the adoption of new Bylaws;

(e)      the  amendment  or repeal of any  resolution  of the Board of  Trustees
         which by its express terms is not so amendable or repealable;

(f)      a distribution to the shareholders of the Trust, except at a rate or in
         a periodic amount or within a designated  range determined by the Board
         of Trustees; or

(g)      the appointment of any other committees of the Board of Trustees or the
         members of these committees.


Section 2.  Meetings and Action of Committees
Meetings  and action of  committees  shall be  governed by and held and taken in
accordance with the provisions of Article III of these Bylaws, with such changes
in the context  thereof as are  necessary to  substitute  the  committee and its
members  for the Board of  Trustees  and its  members,  except  that the time of
regular  meetings of committees  may be  determined  either by resolution of the
Board of  Trustees  or by  resolution  of the  committee.  Special  meetings  of
committees may also be called by resolution of the Board of Trustees, and notice
of special meetings of committees  shall also be given to all alternate  members
who shall have the right to attend all meetings of the  committee.  The Board of
Trustees may adopt rules for the  government of any  committee not  inconsistent
with the provisions of these Bylaws.


                                    ARTICLE V
                                    Officers

Section 1.  Officers
The officers of the Trust shall be a President, a Secretary and a Treasurer. The
Trust may also have,  at the  discretion  of the Board of Trustees,  one or more
Vice  Presidents,  one or more  Assistant  Secretaries,  one or  more  Assistant
Treasurers,  and such other officers as may be appointed in accordance  with the
provisions  of Section 3 of this Article V. Any number of offices may be held by
the same person.


Section 2.  Election of Officers
The  officers  of the  Trust,  except  such  officers  as may  be  appointed  in
accordance  with the  provisions  of Section 3 or  Section 5 of this  Article V,
shall be chosen by the Board of  Trustees,  and each shall serve at the pleasure
of the Board of Trustees, subject to the rights, if any, of an officer under any
contract of employment.


Section 3.  Subordinate Officers
The Board of Trustees may appoint and may empower the  president to appoint such
other officers as the business of the Trust may require, each of whom shall hold
office for such  period,  have such  authority  and  perform  such duties as are
provided  in these  Bylaws  or as the  Board of  Trustees  may from time to time
determine.


Section 4.  Removal and Resignation of Officers
Subject to the rights,  if any, of an officer under any contract of  employment,
any  officer  may be  removed,  either  with or without  cause,  by the Board of
Trustees at any regular or special meeting of the Board of Trustees or except in
the case of an officer  upon whom such power of removal may be  conferred by the
Board of Trustees.

Any officer may resign at any time by giving  written  notice to the Trust.  Any
resignation  shall take  effect at the date of the  receipt of that notice or at
any later time specified in that notice; and unless otherwise  specified in that
notice,  the  acceptance  of the  resignation  shall not be necessary to make it
effective.  Any  resignation is without  prejudice to the rights,  if any, o the
Trust under any contract to which the officer is a party.


Section 5.  Vacancies In Offices
A vacancy in any office because of death, resignation, removal, disqualification
or other  cause  shall be filled in the manner  prescribed  in these  Bylaws for
regular appointment to that office.


Section 6.  Chairman of the Board
The Chairman of the Board shall, if present, preside at meetings of the Board of
Trustees  and  exercise  and perform such other powers and duties as may be from
time to time  assigned  to him by the Board of  Trustees  or  prescribed  by the
Bylaws.


Section 7.  President
Subject  to such  supervisory  powers,  if any,  as may be given by the Board of
Trustees to the  Chairman of the Board,  the  President  shall be the  principal
executive  officer and the principal  operating  officer of the Trust and shall,
subject to control of the Board of Trustees, have general supervision, direction
and control of the business and the officers of the Trust.  He shall  preside at
all shareholder  meetings and, in the absence of the Chairman of the Board or if
there be none,  at all  meetings  of the Board of  Trustees.  He shall  have the
general  powers  and  duties  of  management  usually  vested  in the  office of
President of a corporation and shall have such other powers and duties as may be
prescribed by the Board of Trustees or these Bylaws.


Section 8.  Vice Presidents
In the absence or disability of the president,  the vice presidents,  if any, in
order of their rank as fixed by the Board of Trustees  or if not ranked,  a vice
president  designated by the Board of Trustees,  shall perform all the duties of
the  president and when so acting shall have all powers of and be subject to all
the restrictions  upon the president.  The vice presidents shall have such other
powers and perform such other duties as from time to time may be prescribed  for
them  respectively by the Board of Trustees or by these Bylaws and the president
or the chairman of the board.


Section 9.  Secretary
The secretary shall keep or cause to be kept at the principal  executive  office
of the Trust or such other place as the Board of  Trustees  may direct a book of
minutes of all  meetings  and actions of  trustees,  committees  of trustees and
shareholders with the time and place of holding, whether regular or special, and
if special,  how  authorized,  the notice  given,  the names of those present at
trustees'  meetings  or  committee  meetings,  the  number of shares  present or
represented at shareholders' meetings and the proceedings.

The secretary shall keep or cause to be kept at the principal  executive  office
of the Trust or at the office of the Trust's  transfer  agent or  registrar,  as
determined  by  resolution  of the  Board of  Trustees,  a share  register  or a
duplicate  share  register  showing  the  names of all  shareholders  and  their
addresses, the number and classes of shares held by each, the number and date of
certificates  issued  for the same and the number  and date of  cancellation  of
every certificate surrendered for cancellation.

The  secretary  shall give or cause to be given  notice of all  meetings  of the
shareholders and the Board of Trustees required by these Bylaws or by applicable
law to be given and shall have such other  powers and perform  such other duties
as may be prescribed by the Board of Trustees or by these Bylaws.


Section 10.  Chief Financial Officer
The chief  financial  officer  shall be the principal  financial and  accounting
officer  of the  Trust  and  shall  keep  and  maintain  or cause to be kept and
maintained  adequate and correct books and records of accounts of the properties
and  business  transactions  of the Trust,  including  accounts  of its  assets,
liabilities, receipts, disbursements,  gains, losses, capital, retained earnings
and  shares.  The  books of  account  shall at all  reasonable  times be open to
inspection by any trustee.

The chief financial  officer shall deposit all monies and other valuables in the
name and to the credit of the Trust with such  depositories as may be designated
by the Board of  Trustees.  He shall  disburse  the funds of the Trust as may be
ordered by the Board of Trustees,  shall render to the  president  and trustees,
whenever  they  request  it,  an  account  of all of his  transactions  as chief
financial  officer and of the  financial  condition  of the Trust and shall have
other powers and perform such other duties as may be  prescribed by the Board of
Trustees or these Bylaws.


                                   ARTICLE VI
        Indemnification of Trustees, Officers, Employees and Other Agents

Section 1.  Agents, Proceedings and Expenses
For the  purpose  of this  Article,  "agent"  means any  person  who is or was a
trustee,  officer, employee or other agent of this Trust or is or was serving at
the request of this Trust as a trustee, director,  officer, employee or agent of
another foreign or domestic corporation,  partnership,  joint venture,  trust or
other  enterprise or was a trustee,  director,  officer,  employee or agent of a
foreign or domestic corporation which was a predecessor of another enterprise at
the  request  of such  predecessor  entity;  "proceding"  means any  threatened,
pending  or   completed   actin  or   proceeding,   whether   civil,   criminal,
administrative  or  investigative;  and "expenses"  includes without  limitation
attorney's  fees and any  expenses of  establishing  a right to  indemnification
under this Article.


Section 2.  Actions Other Than By Trust
This Trust shall  indemnify any person who was or is a party or is threatened to
be made a party to any  proceeding  (other  than an action by or in the right of
this  Trust) by  reason of the fact that such  person is or was an agent of this
Trust,  against  expenses,  judgments,  fines,  settlements  and  other  amounts
actually and  reasonably  incurred in  connection  with such  proceeding if that
person acted in good faith and in a manner that person reasonably believed to be
in the best  interests  of this Trust and in the case of a criminal  proceeding,
had no reasonable cause to believe the conduct of that person was unlawful.  The
termination of any proceeding by judgment, order, settlement, conviction or upon
a plea of nolo  contendere  or its  equivalent  shall  not of  itself  create  a
presumption  that the person did not act in good faith and in a manner which the
person reasonably believed to be in the best interests of this Trust or that the
person had reasonable cause to believe that the person's conduct was unlawful.


Section 3.  Actions By The Trust
This Trust shall  indemnify any person who was or is a party or is threatened to
be made a party to any  threatened,  pending  or  completed  action by or in the
right of this  Trust to  procure a  judgment  in its favor by reason of the fact
that that person is or was an agent of this Trust, against expenses actually and
reasonably  incurred by that person in connection with the defense or settlement
of that  action if that  person  acted in good  faith,  in a manner  that person
believed to be in the best interests of this Trust and with such care, including
reasonable inquiry, as an ordinarily prudent person in a like position would use
under similar circumstances.


Section 4.  Exclusion of Indemnification
Notwithstanding  any provision to the contrary contained herein,  there shall be
no right to  indemnification  for any  liability  arising  by reason of  willful
misfeasance,  bad faith,  gross  negligence,  or the  reckless  disregard of the
duties involved in the conduct of the agent's office with this Trust.

No indemnification shall be made under Sections 2 or 3 of this Article:

(a)      In respect of any claim,  issue or matter as to which that person shall
         have been  adjudged to be liable in the  performance  of that  person's
         duty to this  Trust,  unless and only to the  extent  that the court in
         which that action was brought shall determine upon  application that in
         view of all the  circumstances  of the case, that person was not liable
         by reason of the disabling conduct set forth in the preceding paragraph
         and is fairly and  reasonably  entitled to  indemnity  for the expenses
         which the court shall determine; or

(b)      Of amounts paid in settling or otherwise  disposing of a threatened  or
         pending action, with or without court approval, or of expenses incurred
         in  defending  a  threatened  or  pending  action  which is  settled or
         otherwise  disposed  of without  court  approval,  unless the  required
         approval set forth in Section 6 of this Article is obtained.


Section 5.  Successful Defense By Agent
To the extent that an agent of this Trust has been  successful  on the merits in
defense of any  proceeding  referred to in Sections 2 or 3 of this Article or in
defense of any claim,  issue or matter  therein,  before the court or other body
before whom the proceeding was brought,  the agent shall be indemnified  against
expenses actually and reasonably incurred by the agent in connection  therewith,
provided that the Board of Trustees, including a majority who are disinterested,
non-party  trustees,  also determines that based upon a review of the facts, the
agent was not liable by reason of the disabling conduct referred to in Section 4
of this Article.


Section 6.  Required Approval
Except as provided in Section 5 of this Article, any indemnification  under this
Article shall be made by this Trust only if authorized in the specific case on a
determination  that  indemnification of the agent is proper in the circumstances
because  the agent  has met the  applicable  standard  of  conduct  set forth in
Sections  2 or 3 of this  Article  and is not  prohibited  from  indemnification
because of the disabling conduct set forth in Section 4 of this Article, by:

(a)      A majority vote of a quorum  consisting of trustees who are not parties
         to the  proceeding  and are not  interested  persons  of the  trust (as
         defined in the Investment Company Act of 1940); or

(b)      A written opinion by an independent legal counsel.


Section 7.  Advance of Expenses
Expenses  incurred in  defending  any  proceeding  may be advanced by this Trust
before the final  disposition  of the proceeding on receipt of an undertaking by
or on behalf of the agent to repay the amount of the advance  unless it shall be
determined ultimately that the agent is entitled to be indemnified as authorized
in this Article, provided the agent provides a security for his undertaking,  or
a  majority  of a  quorum  of  the  disinterested,  non-party  trustees,  or  an
independent  legal counsel in a written opinion,  determine that based on review
of  readily  available  facts,  there is  reason  to  believe  that  said  agent
ultimately will be found entitled to indemnification.


Section 8.  Other Contractual Rights
Nothing contained in this Article shall affect any right to  indemnification  to
which persons  other than trustees and officers of this Trust or any  subsidiary
hereof may be entitled by contract or otherwise.


Section 9.  Limitations
No  indemnification  or  advance  shall be made under  this  Article,  except as
provided in Sections 5 or 6 in any circumstances where it appears:

(a)      That it would be  inconsistent  with a provision of the  Declaration of
         Trust,  a resolution of the  shareholders  or an agreement in effect at
         the time of  accrual of the  alleged  cause of action  asserted  in the
         proceeding  in which the expenses  were  incurred or other amounts were
         paid which prohibits or otherwise limits indemnification; or

(b)      That it would be inconsistent with any condition expressly imposed by a
         court in approving a settlement.


Section 10.  Insurance
Upon and in the event of a determination  by the Board of Trustees of this Trust
to purchase such insurance,  this trust shall purchase and maintain insurance on
behalf of any agent of this Trust  against  any  liability  asserted  against or
incurred by the agent in such  capacity or arising out of the agent's  status as
such,  but only to the extent that this Trust would have the power to  indemnify
the agent against that liability under the provisions of this Article.


Section 11.  Fiduciaries of Employee Benefit Plan
This Article does not apply to any  proceeding  against any trustee,  investment
manager or other fiduciary of an employee benefit plan in that person's capacity
as such,  even  though that person may also be an agent of this Trust as defined
in Section 1 of this Article.  Nothing contained in this Article shall limit any
right to  indemnification  to which such a trustee,  investment manager or other
fiduciary may be entitled by contract or otherwise which shall be enforceable to
the extent permitted by applicable law other than this Article.


                                   ARTICLE VII
                               Records and Reports

Section 1.  Maintenance and Inspection of Share Register
This Trust shall keep at its principal  executive office or at the office of its
transfer  agent or  registrar,  if  either be  appointed  and as  determined  by
resolution of the Board of Trustees,  a record of its  shareholders,  giving the
names and addresses of all shareholders and the number and series of shares held
by each shareholder.


Section 2.  Maintenance and Inspection of Bylaws
The Trust shall keep at is principal  executive office the original or a copy of
these  Bylaws as  amended  to date,  which  shall be open to  inspection  by the
shareholders at all reasonable times during office hours.


Section 3.  Maintenance and Inspection of Other Records
The accounting  books and records and minutes of proceedings of the shareholders
and the  Board of  Trustees  and any  committee  or  committees  of the Board of
Trustees  shall  be kept at such  place or  places  designated  by the  Board of
Trustees  or in the  absence of such  designation,  at the  principal  executive
office  of the  Trust.  The  minutes  shall  be kept  in  written  form  and the
accounting  books and  records  shall be kept  either in written  form or in any
other form  capable of being  converted  into  written  form.  The  minutes  and
accounting books and records shall be open to inspection upon the written demand
of any  shareholder  or holder of a voting trust  certificate  at any reasonable
time  during  usual  business  hours for a  purpose  reasonably  related  to the
holder's  interests  as a  shareholder  or  as  the  holder  of a  voting  trust
certificate. The inspection may be made in person or by an agent or attorney and
shall include the right to copy and make extracts.


Section 4.  Inspection by Trustees
Every trustee shall have the absolute  right at any  reasonable  time to inspect
all books,  records,  and documents of every kind and the physical properties of
the Trust.  This inspection by a trustee may be made in person or by an agent or
attorney  and the  right  of  inspection  includes  the  right  to copy and make
extracts of documents.


Section 5.  Financial Statements
A copy of any  financial  statements  and any income  statement of the Trust for
each quarterly period of each fiscal year and accompanying  balance sheet of the
Trust as of the end of each  such  period  that has been  prepared  by the Trust
shall be kept on file in the  principal  executive  office  of the  Trust for at
least  twelve  (12) months and each such  statement  shall be  exhibited  at all
reasonable  times  to any  shareholder  demanding  an  examination  of any  such
statement or a copy shall be mailed to any such shareholder.

The quarterly  income  statements and balance sheets referred to in this section
shall be  accompanied  by the  report,  if any, of any  independent  accountants
engaged by the Trust or the  certificate  of an authorized  officer of the Trust
that the financial  statements  were  prepared  without audit from the books and
records of the Trust.


                                  ARTICLE VIII
                                 General Matters

Section 1.  Checks, Drafts, Evidence of Indebtedness
All  checks,  drafts,  or other  orders  for  payment  of money,  notes or other
evidences of indebtedness issued in the name of or payable to the Trust shall be
signed or  endorsed by such person or persons and in such manner as from time to
time shall be determined by resolution of the Board of Trustees.


Section 2.  Contracts and Instruments; How Executed
The Board of  Trustees,  except  as  otherwise  provided  in these  Bylaws,  may
authorize any officer or officers,  agent or agents,  to enter into any contract
or  execute  any  instrument  in the name of and on behalf of the Trust and this
authority  may be general  or  confined  to  specific  instances;  and unless so
authorized or ratified by the Board of Trustees or within the agency power of an
officer,  no officer,  agent,  or employee  shall have any power or authority to
bind the Trust by any  contract  or  engagement  or to pledge  its  credit or to
render it liable for any purpose or for any amount.


Section 3.  Certificates for Shares
A certificate or certificates for shares of beneficial interest in any series of
the trust shall be issued to each shareholder when any of these shares are fully
paid. All certificates  shall be signed in the name of the Trust by the chairman
of the board or the  president  or vice  president  and by the  chief  financial
officer or an assistant  treasurer or the secretary or any assistant  secretary,
certifying  the  number  of  shares  and  the  series  of  shares  owned  by the
shareholders.  Any or all of the signatures on the certificate may be facsimile.
In case any  officer,  transfer  agent,  or  registrar  who has  signed or whose
facsimile signature has been place on a certificate shall have ceased to be that
officer,  transfer agent, or registrar before that certificate is issued, it may
be issued by the Trust with the same  effect as if that  person were an officer,
transfer agent or registrar at the date of issue. Notwithstanding the foregoing,
the Trust may adopt and use a system of  issuance,  recordation  and transfer of
its shares by electronic or other means.


Section 4.  Lost Certificates
Except as provided in this  Section 4, no new  certificates  for shares shall be
issued to replace an old  certificate  unless the latter is  surrendered  to the
Trust and  cancelled  at the same time.  The Board of  Trustees  may in case any
share  certificate or certificate  for any other  security is lost,  stolen,  or
destroyed, authorize the issuance of a replacement certificate on such terms and
conditions  as the Board of Trustees  may  require,  including  a provision  for
indemnification  of the  Trust  secured  by a bond or  other  adequate  security
sufficient  to protest the Trust  against any claim that may be made against it,
including  any expense or liability on account of the alleged  loss,  theft,  or
destruction of the certificate or the issuance of the replacement certificate.


Section 5.  Representation of Shares of Other Entities
The  chairman of the board,  the  president  or any vice  president or any other
person  authorized  by  resolution  of the  Board of  Trustees  or by any of the
foregoing designated officers,  is authorized to vote on behalf of the Trust any
and all shares of any  corporation or  corporations,  partnerships,  trusts,  or
other  entities,  foreign or  domestic,  standing in the name of the Trust.  The
authority  granted to these officers to vote or represent on behalf of the Trust
any and all shares held by the Trust in any form of entity may be  exercised  by
any of these officers in person or by any person  authorized to do so by a proxy
duly executed by these officers.


                                   ARTICLE IX
                                   Amendments

Section 1.  Amendment by Shareholders
New Bylaws may be amended or repealed by the affirmative vote or written consent
of a majority of the outstanding  shares  entitled to vote,  except as otherwise
provided by applicable law or by the Declaration of Trust or these Bylaws.


Section 2.  Amendment By Trustees
Subject to the right of shareholders as provided in Section 1 of this Article to
adopt,  amend or repeal Bylaws,  and except as otherwise  provided by applicable
law or by the  Declaration of Trust,  these Bylaws may be adopted,  amended,  or
repealed by the Board of Trustees.

                  AMERICAN CENTURY INVESTMENT MANAGEMENT, INC.

                              MANAGEMENT AGREEMENT
                                  Advisor Class

         This  MANAGEMENT  AGREEMENT is made and entered into by and between the
registered  investment  companies  listed on  Exhibit A to this  Agreement  (the
"Companies"),  as of the dates  noted on such  Exhibit A, and  American  Century
Investment Management, Inc., a Delaware corporation (the "Investment Manager").

         WHEREAS,  the Companies  have adopted a Multiple Class Plan dated as of
August 1, 1997,  (as the same may be amended  from time to time,  the  "Multiple
Class Plan"),  pursuant to Rule 18f-3 of the Investment  Company Act of 1940, as
amended (the "Investment Company Act"); and

         WHEREAS, the Multiple Class Plan establishes three classes of shares of
certain series of shares of the Companies: the Investor Class, the Institutional
Class and the Advisor Class; and

         WHEREAS,  the sole class of shares  issued by each  series of shares of
the  Companies  prior  to the  adoption  of the  Multiple  Class  Plan  has been
designated as the Investor Class, the investment  management  services for which
are  provided by the  Investment  Manager  pursuant to that  certain  Management
Agreement dated as of August 1, 1997 and its predecessors; and

         IN  CONSIDERATION   of  the  mutual  promises  and  agreements   herein
contained, the parties agree as follows:

1.       Investment Management Services.  The Investment Manager shall supervise
         the  investments  of the Advisor  Class of each series of shares of the
         Companies  contemplated as of the date hereof, and the Advisor Class of
         such  subsequent  series of shares as the  Companies  shall  select the
         Investment Manager to manage. In such capacity,  the Investment Manager
         shall maintain a continuous investment program for the Advisor Class of
         each such series,  determine what securities shall be purchased or sold
         by each series, secure and evaluate such information as it deems proper
         and take  whatever  action is  necessary or  convenient  to perform its
         functions,  including  the  placing of  purchase  and sale  orders.  In
         performing its duties hereunder, the Investment Manager will manage the
         portfolio of all classes of a particular series as a single portfolio.

2.       Compliance  With  Laws.  All  functions  undertaken  by the  Investment
         Manager  hereunder  shall at all times conform to, and be in accordance
         with, any requirements imposed by:

         (a)      the  Investment  Company  Act and any  rules  and  regulations
                  promulgated thereunder;

         (b)      any other applicable provisions of law;

         (c)      the   Declaration  of  Trust  or  Articles  of   Incorporation
                  applicable  to each of the  Companies  as amended from time to
                  time;

         (d)      the By-Laws of the Companies as amended from time to time; and

         (e)      The Multiple Class Plan; and

         (f)      the registration  statement of the Companies,  as amended from
                  time to time,  filed under the  Securities Act of 1933 and the
                  Investment Company Act.

3.       Board  Supervision.  All of the functions  undertaken by the Investment
         Manager hereunder shall at all times be subject to the direction of the
         Board of Trustees or Board of  Directors  (collectively,  the "Board of
         Directors") of the Companies, its executive committee, or any committee
         or officers of the Companies acting under the authority of the Board of
         Directors.

4.       Payment  Of  Expenses.  The  Investment  Manager  will  pay  all of the
         expenses of the Advisor Class of each series of the  Companies'  shares
         that  it  shall  manage,   other  than   interest,   taxes,   brokerage
         commissions,  portfolio insurance,  extraordinary expenses and the fees
         and expenses of those  Directors  who are not  "interested  persons" as
         defined  in  1940  Act  (hereinafter  referred  to as the  "Independent
         Directors")   (including   counsel  fees)  and  expenses   incurred  in
         connection with the provision of shareholder  services and distribution
         services under the Master  Distribution  and Shareholder  Services Plan
         dated as of August 1, 1997.  The  Investment  Manager  will provide the
         Companies with all physical  facilities and personnel required to carry
         on the business of the Advisor Class of each series that the Investment
         Manager shall manage, including but not limited to office space, office
         furniture,  fixtures and equipment,  office supplies, computer hardware
         and software and salaried  and hourly paid  personnel.  The  Investment
         Manager may at its expense  employ others to provide all or any part of
         such facilities and personnel.

5.       Account  Fees.  The Board of  Directors  may  impose  fees for  various
         account services,  proceeds of which may be remitted to the appropriate
         Fund or the Investment Manager at the discretion of the Board. At least
         60 days' prior written  notice of the intent to impose such fee must be
         given to the shareholders of the affected series.

6.       Management Fees.

         (a)      In  consideration  of the services  provided by the Investment
                  Manager,  the  Advisor  Class of each  series of shares of the
                  Companies  managed by the Investment  Manager shall pay to the
                  Investment  Manager a per annum  management fee  (hereinafter,
                  the "Applicable  Fee").  The calculation of the Applicable Fee
                  for the Advisor Class of a series is performed as follows:

                  (i)      Each series is  assigned  to one of three  categories
                           based   on   its   overall    investment    objective
                           ("Investment  Category").   The  Investment  Category
                           assignments appear in Exhibit B to this Agreement.

                  (ii)     Each  series is  assigned a fee  schedule  within its
                           Investment  Category in Exhibit C to this  Agreement.
                           The  Investment   Category   assets  managed  by  the
                           Investment  Manager determines the first component of
                           a  series'  fee.  This  fee  is  referred  to as  the
                           "Investment  Category Fee". The  determination of the
                           Investment Category assets is as follows:

                           a)       Money Market Fund Category. The assets which
                                    are  used to  determine  the  fee  for  this
                                    Investment Category is the sum of the assets
                                    of all of the  open-end  investment  company
                                    series  which   invest   primarily  in  debt
                                    securities,  are  subject to Rule 2a-7 under
                                    the  1940  Act,  managed  by the  Investment
                                    Manager  and  distributed  to the  public by
                                    American Century Investment Services, Inc.

                           b)       Bond Fund  Category.  The  assets  which are
                                    used  to   determine   the   fee  for   this
                                    Investment Category is the sum the assets of
                                    all  of  the  open-end   investment  company
                                    series  which   invest   primarily  in  debt
                                    securities,  are not  subject  to Rule  2a-7
                                    under  the  1940  Act,  are  managed  by the
                                    Investment  Manager and are  distributed  to
                                    the public by  American  Century  Investment
                                    Services, Inc.

                           c)       Equity Fund  Category.  The assets which are
                                    used  to   determine   the   fee  for   this
                                    Investment Category is the sum the assets of
                                    all  of  the  open-end   investment  company
                                    series  which  invest  primarily  in  equity
                                    securities,  are  managed by the  Investment
                                    Manager and are distributed to the public by
                                    American Century Investment Services, Inc.

                  (iii)    A fee  which is based on the  total  assets in all of
                           the  Investment   Categories  is  determined  by  the
                           schedule  which  appears  in  Exhibit  D. This fee is
                           referred to as the series' "Complex Fee".

                  (iv)     The  Applicable  Fee for a  series  is the sum of the
                           Investment Category Fee and the Complex Fee.

                  (v)      The assets  which are used to compute the  Applicable
                           Fee  shall  be the  assets  of  all  of the  open-end
                           investment   companies   managed  by  the  Investment
                           Manager.  Any exceptions to this requirement shall be
                           approved by the Board of Directors of the Companies.

         (b)      On the first business day of each month,  the Advisor Class of
                  each series of shares shall pay the management fee at the rate
                  specified  by  subparagraph  (a) of  this  paragraph  6 to the
                  Investment  Manager for the  previous  month.  The fee for the
                  previous  month  shall  be  calculated  by   multiplying   the
                  Applicable Fee for such series by the aggregate  average daily
                  closing  value of the series' net assets  during the  previous
                  month, and further multiplying that product by a fraction, the
                  numerator of which shall be the number of days in the previous
                  month,  and the denominator of which shall be 365 (366 in leap
                  years).

         (c)      In the event that the Board of  Directors  of a Company  shall
                  determine to issue an Advisor Class of any  additional  series
                  of shares for which it is proposed that the Investment Manager
                  serve as investment  manager,  the Company and the  Investment
                  Manager shall enter into an Addendum to this Agreement setting
                  forth  the name of the  series,  the  Applicable  Fee and such
                  other terms and conditions as are applicable to the management
                  of such series of shares.

7.       Continuation  Of Agreement.  This  Agreement  shall continue in effect,
         unless sooner terminated as hereinafter  provided,  for a period of two
         years from the  execution  hereof,  and for as long  thereafter  as its
         continuance  is  specifically  approved,  as  to  each  series  of  the
         Companies,  at least  annually  (i) by the  Board of  Directors  of the
         Companies or by the vote of a majority of the outstanding Advisor Class
         voting securities of the Companies,  and (ii) by the vote of a majority
         of the Directors of the Companies, who are not parties to the agreement
         or  interested  persons of any such party,  cast in person at a meeting
         called for the purpose of voting on such approval.

8.       Termination.  This  Agreement  may be  terminated,  with respect to any
         series,  by the  Investment  Manager at any time  without  penalty upon
         giving the  appropriate  Company 60 days'  written  notice,  and may be
         terminated,  with respect to any series, at any time without penalty by
         the Board of  Directors  of a Company or by vote of a  majority  of the
         outstanding  Advisor Class voting securities of such series on 60 days'
         written notice to the Investment Manager.

9.       Effect Of Assignment.  This Agreement shall automatically  terminate in
         the  event  of  assignment  by  the   Investment   Manager,   the  term
         "assignment"  for this  purpose  having the meaning  defined in Section
         2(a)(4) of the 1940 Act.

10.      Other  Activities.  Nothing herein shall be deemed to limit or restrict
         the  right  of  the  Investment  Manager,  or the  right  of any of its
         officers, directors or employees (who may also be a trustee, officer or
         employee  of a Company),  to engage in any other  business or to devote
         time and  attention  to the  management  or other  aspects of any other
         business,  whether  of a similar  or  dissimilar  nature,  or to render
         services  of any kind to any other  corporation,  firm,  individual  or
         association.

11.      Standard  Of Care.  In the absence of willful  misfeasance,  bad faith,
         gross  negligence,  or reckless  disregard of its obligations or duties
         hereunder on the part of the Investment  Manager,  it, as an inducement
         to it to enter into this  Agreement,  shall not be subject to liability
         to the Companies or to any  shareholder of the Companies for any act or
         omission  in the  course  of, or  connected  with,  rendering  services
         hereunder  or for any losses  that may be  sustained  in the  purchase,
         holding or sale of any security.

12.      Separate  Agreement.   The  parties  hereto  acknowledge  that  certain
         provisions of the 1940 Act, in effect, treat each series of shares of a
         registered   investment  company  as  a  separate  investment  company.
         Accordingly,  the parties hereto hereby  acknowledge and agree that, to
         the extent deemed  appropriate  and consistent  with the 1940 Act, this
         Agreement  shall be deemed to constitute a separate  agreement  between
         the  Investment  Manager  and each  series of  shares of the  Companies
         managed by the Investment Manager.

13.      Use of the Names  "American  Century" and "Benham." The name  "American
         Century" and all rights to the use of the names "American  Century" and
         "Benham"  are the  exclusive  property  of  American  Century  Services
         Corporation  ("ACSC"), an affiliate of the Investment Manager. ACSC has
         consented to, and granted a  non-exclusive  license for, the use by the
         Companies and their respective  series of the names "American  Century"
         and  "Benham"  in the name of the  Companies  and any  series of shares
         thereof.  Such consent and non-exclusive license may be revoked by ACSC
         in its discretion if ACSC, the Investment  Manager,  or a subsidiary or
         affiliate of either of them is not employed as the  investment  manager
         of each  series  of  shares  of the  Companies.  In the  event  of such
         revocation,  the Companies and each series of shares  thereof using the
         name  "American  Century"  or  "Benham"  shall  cease  using  the  name
         "American Century" or "Benham",  unless otherwise  consented to by ACSC
         or any successor to its interest in such names.

         IN WITNESS  WHEREOF,  the  parties  have caused  this  Agreement  to be
executed by their  respective  duly  authorized  officers as of the day and year
indicated on Exhibit A.


                                    AMERICAN CENTURY GOVERNMENT INCOME TRUST
                                    AMERICAN CENTURY INTERNATIONAL BOND FUNDS
                                    AMERICAN CENTURY QUANTITATIVE EQUITY FUNDS
Attest:                             AMERICAN CENTURY TARGET MATURITIES TRUST

/*/Douglas A. Paul                  /*/James M. Benham
Douglas A. Paul                     James M. Benham
Secretary                           President and Chief Executive Officer


Attest:                             AMERICAN CENTURY INVESTMENT MANAGEMENT, INC.

/*/William M. Lyons                 /*/Robert C. Puff
William M. Lyons                    Robert C. Puff
Secretary                           President
<PAGE>
                                    Exhibit A
         Registered Investment Companies Subject to Management Agreement
- --------------------------------------------------------------- --------------

Registered Investment Company and Advisor Class Funds                Date
- --------------------------------------------------------------- --------------

American Century Government Income Trust
     Benham GNMA Fund                                           August 1, 1997
     Benham Government Agency Money Market Fund                 August 1, 1997
     Benham Intermediate-Term Treasury Fund                     August 1, 1997
     Benham Long-Term Treasury Fund                             August 1, 1997
     Benham Short-Term Government Fund                          August 1, 1997
     Benham Short-Term Treasury Fund                            August 1, 1997

American Century International Bond Funds
     Benham International Bond Fund                             August 1, 1997

American Century Investment Trust
     Benham Prime Money Market Fund                             June 1, 1998

American Century Quantitative Equity Funds
     American Century Equity Growth Fund                        August 1, 1997
     American Century Global Gold Fund                          August 1, 1997
     American Century Global Natural Resources Fund             August 1, 1997
     American Century Income & Growth Fund                      August 1, 1997
     American Century Small Capitalization Quantitative Fund    July 1, 1998
     American Century Utilities Fund                            August 1, 1997

American Century Target Maturities Trust
     Benham Target Maturities Trust: 2000                       August 1, 1997
     Benham Target Maturities Trust: 2005                       August 1, 1997
     Benham Target Maturities Trust: 2010                       August 1, 1997
     Benham Target Maturities Trust: 2015                       August 1, 1997
     Benham Target Maturities Trust: 2020                       August 1, 1997
     Benham Target Maturities Trust: 2025                       August 1, 1997
- --------------------------------------------------------------- --------------

By executing  this Exhibit A, each Fund  executes  the  Management  Agreement to
which it is  attached  and all of its  Exhibits  and  amendments  as of the date
specified above.

                                     AMERICAN CENTURY GOVERNMENT INCOME TRUST
                                     AMERICAN CENTURY INTERNATIONAL BOND FUNDS
AMERICAN CENTURY INVESTMENT          AMERICAN CENTURY QUANTITATIVE EQUITY FUNDS
MANAGEMENT, INC.                     AMERICAN CENTURY TARGET MATURITIES TRUST


/*/Robert C. Puff                    /*/Douglas A. Paul
Robert C. Puff                       Douglas A. Paul
President                            Secretary
<PAGE>
<TABLE>
                                    Exhibit B

                          Series Investment Categories
- ----------------------------------------- ---------------------------------------------------------
<S>                                      <C>
Investment Category                       Series
- ----------------------------------------- ---------------------------------------------------------

Money Market Funds                        Benham Government Agency Money Market Fund
                                          Benham Prime Money Market Fund

Bond Funds                                Benham GNMA Fund
                                          Benham Intermediate-Term Treasury Fund
                                          Benham International Bond Fund
                                          Benham Long-Term Treasury Fund
                                          Benham Short-Term Government Fund
                                          Benham Short-Term Treasury Fund
                                          Benham Target Maturities Trust: 2000
                                          Benham Target Maturities Trust: 2005
                                          Benham Target Maturities Trust: 2010
                                          Benham Target Maturities Trust: 2015
                                          Benham Target Maturities Trust: 2020
                                          Benham Target Maturities Trust: 2025

Equity Funds                              American Century Equity Growth Fund
                                          American Century Global Gold Fund
                                          American Century Global Natural Resources Fund
                                          American Century Income & Growth Fund
                                          American Century Small Capitalization Quantitative Fund
                                          American Century Utilities Fund
- ----------------------------------------- ---------------------------------------------------------

Dated:  June 1, 1998

                                          AMERICAN CENTURY GOVERNMENT INCOME TRUST
                                          AMERICAN CENTURY INTERNATIONAL BOND FUNDS
AMERICAN CENTURY INVESTMENT 
MANAGEMENT, INC.                          AMERICAN CENTURY QUANTITATIVE EQUITY FUNDS
                                          AMERICAN CENTURY TARGET MATURITIES TRUST

As executed on behalf of the above in     As executed on behalf of the above in
Exhibit A by                              Exhibit A by
Robert C. Puff                            James M. Benham
President                                 President and Chief Executive Officer
</TABLE>
<PAGE>
<TABLE>
                                    Exhibit C

              Investment Category Fee Schedules: Money Market Funds

Schedule 1
                                                   ------------------------------------------------------------------
<S>                               <C>             <C>     
Category Assets                   Fee Rate                                 Schedule 1 Funds:
First $1 billion                  0.2500%                     Benham Government Agency Money Market Fund
- --------------------------        --------         ------------------------------------------------------------------
Next $1 billion                   0.2070%
Next $3 billion                   0.1660%
Next $5 billion                   0.1490%
Next $15 billion                  0.1380%
Next $25 billion                  0.1375%
Thereafter                        0.1370%

Schedule 2
                                                   ------------------------------------------------------------------
Category Assets                   Fee Rate                                 Schedule 2 Funds:
First $1 billion                  0.2700%                                        NONE
- --------------------------        --------         ------------------------------------------------------------------
Next $1 billion                   0.2270%
Next $3 billion                   0.1860%
Next $5 billion                   0.1690%
Next $15 billion                  0.1580%
Next $25 billion                  0.1575%
Thereafter                        0.1570%

Schedule 3
                                                   ------------------------------------------------------------------
Category Assets                   Fee Rate                                 Schedule 3 Funds:
First $1 billion                  0.3700%                           Benham Prime Money Market Fund
- --------------------------        --------         ------------------------------------------------------------------
Next $1 billion                   0.3270%
Next $3 billion                   0.2860%
Next $5 billion                   0.2690%
Next $15 billion                  0.2580%
Next $25 billion                  0.2575%
Thereafter                        0.2570%
<PAGE>
                       Category Fee Schedules: Bond Funds


Schedule 1
                                                   ------------------------------------------------------------------
Category Assets                   Fee Rate                                 Schedule 1 Funds:
First $1 billion                  0.2800%                           Benham Short-Term Treasury Fund
Next $1 billion                   0.2280%                       Benham Intermediate-Term Treasury Fund
Next $3 billion                   0.1980%                           Benham Long-Term Treasury Fund
                                                   ------------------------------------------------------------------
Next $5 billion                   0.1780%
Next $15 billion                  0.1650%
Next $25 billion                  0.1630%
Thereafter                        0.1625%

Schedule 2
                                                   ------------------------------------------------------------------
Category Assets                   Fee Rate                                 Schedule 2 Funds:
First $1 billion                  0.3100%                                        NONE
- --------------------------        --------         ------------------------------------------------------------------
Next $1 billion                   0.2580%
Next $3 billion                   0.2280%
Next $5 billion                   0.2080%
Next $15 billion                  0.1950%
Next $25 billion                  0.1930%
Thereafter                        0.1925%

Schedule 3
                                                   ------------------------------------------------------------------
Category Assets                   Fee Rate                                 Schedule 3 Funds:
First $1 billion                  0.3600%                                  Benham GNMA Fund
Next $1 billion                   0.3080%                          Benham Short-Term Government Fund
Next $3 billion                   0.2780%                        Benham Target Maturities Trust: 2000
Next $5 billion                   0.2580%                        Benham Target Maturities Trust: 2005
Next $15 billion                  0.2450%                        Benham Target Maturities Trust: 2010
Next $25 billion                  0.2430%                        Benham Target Maturities Trust: 2015
Thereafter                        0.2425%                        Benham Target Maturities Trust: 2020
                                                                 Benham Target Maturities Trust: 2025
                                                   ------------------------------------------------------------------

                       Category Fee Schedules: Bond Funds
                                   (continued)


Schedule 4
                                                   ------------------------------------------------------------------
Category Assets                   Fee Rate                                 Schedule 4 Funds:
First $1 billion                  0.6100%                           Benham International Bond Fund
- --------------------------                         ------------------------------------------------------------------
Next $1 billion                   0.5580%
Next $3 billion                   0.5280%
Next $5 billion                   0.5080%
Next $15 billion                  0.4950%
Next $25 billion                  0.4930%
Thereafter                        0.4925%

                      Category Fee Schedules: Equity Funds


Schedule 1
                                                   ------------------------------------------------------------------
Category Assets                   Fee Rate                                 Schedule 1 Funds:
First $1 billion                  0.5200%                         American Century Equity Growth Fund
Next $5 billion                   0.4600%                          American Century Global Gold Fund
Next $15 billion                  0.4160%                   American Century Global Natural Resources Fund
Next $25 billion                  0.3690%                        American Century Income & Growth Fund
Next $50 billion                  0.3420%                           American Century Utilities Fund
Next $150 billion                 0.3390%
                                                   ------------------------------------------------------------------
Thereafter                        0.3380%

Schedule 2
                                                   ------------------------------------------------------------------
Category Assets                   Fee Rate                                 Schedule 2 Funds:
First $1 billion                  0.7200%                        American Century Small Capitalization
Next $5 billion                   0.6600%                                  Quantitative Fund
                                                   ------------------------------------------------------------------
Next $15 billion                  0.6160%
Next $25 billion                  0.5690%
Next $50 billion                  0.5420%
Next $150 billion                 0.5390%
Thereafter                        0.5380%

Dated:  June 1, 1998

                                                       AMERICAN CENTURY GOVERNMENT INCOME TRUST
                                                       AMERICAN CENTURY INTERNATIONAL BOND FUNDS
AMERICAN CENTURY INVESTMENT MANAGEMENT, INC.           AMERICAN CENTURY QUANTITATIVE EQUITY FUNDS
                                                       AMERICAN CENTURY TARGET MATURITIES TRUST

As executed on behalf of the above in                  As executed on behalf of the above in
Exhibit A by                                           Exhibit A by
Robert C. Puff                                         Douglas A. Paul
President                                              Secretary
</TABLE>
<PAGE>
                               Exhibit D
                          Complex Fee Schedule

         Complex Assets                              Fee Rate
         --------------                              --------
         First $2.5 billion                          0.0600%
         Next $7.5 billion                           0.0500%
         Next $15.0 billion                          0.0485%
         Next $25.0 billion                          0.0470%
         Next $50.0 billion                          0.0460%
         Next $100.0 billion                         0.0450%
         Next $100.0 billion                         0.0440%
         Next $200.0 billion                         0.0430%
         Next $250.0 billion                         0.0420%
         Next $500.0 billion                         0.0410%
         Thereafter                                  0.0400%




Dated:  June 1, 1998

                                      AMERICAN CENTURY GOVERNMENT INCOME TRUST
                                      AMERICAN CENTURY INTERNATIONAL BOND FUNDS
AMERICAN CENTURY INVESTMENT
MANAGEMENT, INC.                      AMERICAN CENTURY QUANTITATIVE EQUITY FUNDS
                                      AMERICAN CENTURY TARGET MATURITIES TRUST

As executed on behalf                 As executed on behalf 
of the above in                       of the above in
Exhibit A by                          Exhibit A by
Robert C. Puff                        Douglas A. Paul
President                             Secretary

                       CONSENT OF INDEPENDENT ACCOUNTANTS



We consent to the incorporation by reference in  Post-Effective  Amendment No. 6
to the Registration Statement of American Century-Benham Prime Money Market Fund
(the only fund comprising the American  Century  Investment Trust ) on Form N-1A
of our report dated April 7, 1998 on our audit of the financial  statements  and
financial  highlights  of the American  Century-Benham  Prime Money Market Fund,
which report is included in the Annual Report to Shareholders for the year ended
February  28, 1998 which is  incorporated  by  reference  in the  Post-Effective
Amendment to the Registration Statement. We also consent to the reference in the
Statement of Additional  Information to our Firm under the caption  "Independent
Accountants."



                                                         Coopers & Lybrand L.L.P


Kansas City, Missouri

May 11, 1998

                          INDEPENDENT AUDITORS' CONSENT




The Board of Trustees
American Century Investment Trust:


We  consent to the use of our report  dated  April 4, 1997 in your  registration
statement.



/s/KPMG Peat Marwick LLP
KPMG Peat Marwick LLP


Kansas City, Missouri
May 13, 1998

                                BENHAM PRIME FUND
                                YIELD CALCULATION
                                     2/28/98

           Effective Yield:          [(Base Period Return)+1)^365/7]-1

           Base Period Return         =                 0.00099153

           7 Day Effective Yield      =                 5.30%


                              Yield:  = I/B X 365/7

                                   Y  = Yield
                                   I  = total income of hypothetical account 
                                        over the seven day period
                                   B  = beginning account value

                                   I  =                 0.00099153
                                   B  =                $1.00

                         7 Day Yield  =                 5.17%

                                POWER OF ATTORNEY

     KNOW ALL MEN BY THESE  PRESENTS,  that the  undersigned,  AMERICAN  CENTURY
INVESTMENT  TRUST,  hereinafter  called the  "Trust" and  certain  trustees  and
officers of the Trust, do hereby  constitute and appoint James E. Stowers,  III,
William M.  Lyons,  Douglas  A. Paul,  and  Patrick A.  Looby,  and each of them
individually,  their  true and lawful  attorneys  and agents to take any and all
action and execute any and all  instruments  which said attorneys and agents may
deem  necessary or  advisable to enable the Trust to comply with the  Securities
Act of 1933 and/or the Investment Company Act of 1940, as amended, and any rules
regulations,  orders, or other  requirements of the United States Securities and
Exchange  Commission  thereunder,  in connection with the registration under the
Securities  Act of 1933 and/or the  Investment  Company Act of 1940, as amended,
including  specifically,  but without  limitation  of the  foregoing,  power and
authority to sign the name of the Trust in its behalf and to affix its seal, and
to sign the names of each of such  trustees and officers in their  capacities as
indicated,  to any amendment or supplement to the  Registration  Statement filed
with the  Securities  and Exchange  Commission  under the Securities Act of 1933
and/or the Investment Company Act of 1940, as amended, and to any instruments or
documents  filed  or to be  filed  as a  part  of or  in  connection  with  such
Registration  Statement;  the  Registration  Statement  on  Form  N-14  and  any
amendments or  supplements  thereto to be filed with the Securities and Exchange
Commission under the Securities Act of 1933 and/or the Investment Company Act of
1940, as amended,  and to any  instruments or documents  filed or to be filed as
part of or in  connection  with  such  Registration  Statement;  and each of the
undersigned  hereby  ratifies and confirms  all that said  attorneys  and agents
shall do or cause to be done by virtue hereof.

     IN WITNESS  WHEREOF,  the Trust has caused this Power to be executed by its
duly authorized officers on this the 15th day of January, 1998.


                                        AMERICAN CENTURY INVESTMENT TRUST
                                        (A Massachusetts Business Trust)

                                        By:  /s/ Richard W. Ingram
                                             Richard W. Ingram, President


                           SIGNATURE AND TITLE

/s/ James E. Stowers                             /s/ Isaac Stein
James E. Stowers, III                            Isaac Stein
Chairman                                         Director

/s/ Albert A. Eisenstat                          /s/ Jeanne D. Wohlers
Albert A. Eisenstat                              Jeanne D. Wohlers
Director                                         Director

/s/ Ronald J. Gilson                             /s/ William M. Lyons
Ronald J. Gilson                                 William M. Lyons
Director                                         Director

/s/ Myron S. Scholes                             /s/ Maryanne Roepke
Myron S. Scholes                                 Maryanne Roepke
Director                                         Treasurer

                                                 Attest:
/s/ Kenneth E. Scott
Kenneth E. Scott                                 By:/s/ Douglas A. Paul
Director                                            Douglas A. Paul, Secretary

<TABLE> <S> <C>

<ARTICLE> 6
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL  INFORMATION  EXTRACTED FROM THE ANNUAL
REPORT OF AMERICAN CENTURY  INVESTMENT TRUST AND IS QUALIFIED IN ITS ENTIRETY BY
REFERENCE TO SUCH REPORT.
</LEGEND>
<CIK> 0000908406
<NAME> AMERICAN CENTURY INVESTMENT TRUST
<SERIES>
   <NUMBER> 1
   <NAME> AMERICAN CENTURY-BENHAM PRIME MONEY MARKET FUND
       
<S>                      <C>
<PERIOD-TYPE>                              YEAR
<FISCAL-YEAR-END>                          FEB-28-1998
<PERIOD-END>                               FEB-28-1998
<INVESTMENTS-AT-COST>                                  1,409,239,662
<INVESTMENTS-AT-VALUE>                                 1,409,239,662
<RECEIVABLES>                                              1,906,726
<ASSETS-OTHER>                                            12,464,116
<OTHER-ITEMS-ASSETS>                                               0
<TOTAL-ASSETS>                                         1,423,610,504
<PAYABLE-FOR-SECURITIES>                                           0
<SENIOR-LONG-TERM-DEBT>                                            0
<OTHER-ITEMS-LIABILITIES>                                  6,299,817
<TOTAL-LIABILITIES>                                        6,299,817
<SENIOR-EQUITY>                                        1,417,565,184
<PAID-IN-CAPITAL-COMMON>                                           0
<SHARES-COMMON-STOCK>                                  1,417,565,184
<SHARES-COMMON-PRIOR>                                  1,212,268,858
<ACCUMULATED-NII-CURRENT>                                          0
<OVERDISTRIBUTION-NII>                                             0
<ACCUMULATED-NET-GAINS>                                            0
<OVERDISTRIBUTION-GAINS>                                           0
<ACCUM-APPREC-OR-DEPREC>                                    (254,497)
<NET-ASSETS>                                           1,417,310,687
<DIVIDEND-INCOME>                                                  0
<INTEREST-INCOME>                                                  0
<OTHER-INCOME>                                                     0
<EXPENSES-NET>                                             6,503,720
<NET-INVESTMENT-INCOME>                                   67,224,070
<REALIZED-GAINS-CURRENT>                                      24,038
<APPREC-INCREASE-CURRENT>                                          0
<NET-CHANGE-FROM-OPS>                                     67,248,108
<EQUALIZATION>                                                     0
<DISTRIBUTIONS-OF-INCOME>                                 67,224,070
<DISTRIBUTIONS-OF-GAINS>                                           0
<DISTRIBUTIONS-OTHER>                                              0
<NUMBER-OF-SHARES-SOLD>                                2,330,994,339
<NUMBER-OF-SHARES-REDEEMED>                            2,189,600,577
<SHARES-REINVESTED>                                       63,902,564
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