AMERICAN CENTURY GOVERNMENT INCOME TRUST
485BPOS, 1997-02-07
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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. 2-99222

         Pre-Effective Amendment No. ____

         Post-Effective Amendment No._31_                             X
                                                                    -----
                                     and/or

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

         File No. 811-4363

         Amendment No._32_


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

         4500 Main Street 
         P.O. Box 419200
         Kansas City, MO  64141-6200
         (Address of Principal Executive Offices)

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

         Douglas A. Paul
         V. P. and Associate 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 9/23/85)

It is proposed that this filing become effective:

   _____  immediately upon filing pursuant to paragraph (b) of Rule 485
   __X__  on February 10, 1997 pursuant to paragraph (b) of Rule 485
   _____  60 days after filing pursuant to paragraph (a) of Rule 485
   _____  on (date) pursuant to paragraph (a) 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 May 16, 1996, the Registrant filed a Rule
24f-2 Notice on Form 24f-2 with respect to its fiscal year ended March 31, 1996.






                    AMERICAN CENTURY GOVERNMENT INCOME TRUST
                    1933 Act Post-Effective Amendment No. 31
                            1940 Act Amendment No. 32

                      American Century - Benham Inflation-
                             Adjusted Treasury Fund

                                    FORM N-1A
                              CROSS-REFERENCE SHEET

PART A:  PROSPECTUS

ITEM      PROSPECTUS CAPTION

1         Cover Page

2         Transaction and Operating Expense Table

3         Performance Advertising

4         Management,  Further  Information About American  Century,  Investment
          Policies of the Fund,  Risk Factors and Investment  Techniques,  Other
          Investment Practices, Their Characteristics and Risks

5         Management

5A        Not Applicable

6         Further  Information  About  American  Century,  How to Redeem Shares,
          Cover Page, Distributions, Taxes

7         Cover Page, Distribution of Fund Shares, How to Open an Account, Share
          Price, Transfer and Administrative Services

8         How to Redeem Shares, Transfer and Administrative Services

9         Not Applicable




PART B:  STATEMENT OF ADDITIONAL INFORMATION


ITEM      STATEMENT OF ADDITIONAL INFORMATION CAPTION

10        Cover Page

11        Table of Contents

12        Not Applicable

13        Investment Policies and Techniques, Investment Restrictions, Portfolio
          Transactions

14        Trustee and Officers

15        Additional Purchase and Redemption Information, Trustees and Officers

16        Investment  Advisory Services,  Transfer and Administrative  Services,
          Expense Limitation Agreement, About the Trust

17        Portfolio Transactions

18        About the Trust

19        Additional Purchase and Redemption Information, Valuation of Portfolio
          Securities

20        Taxes

21        Additional Purchase and Redemption Information

22        Performance

23        Cover Page




                                   PROSPECTUS

                            [American Century logo]
                                    American
                                  Century(sm)


                                FEBRUARY 10, 1997

                                     BENHAM
                                    GROUP(R)

                           Inflation-Adjusted Treasury


                                 [front cover]




                          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 Group          American Century Group     Twentieth Century(R) 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


  Inflation-Adjusted
       Treasury




                                   PROSPECTUS
                                FEBRUARY 10, 1997

                               Inflation-Adjusted
                                    Treasury

                    AMERICAN CENTURY GOVERNMENT INCOME TRUST

     American  Century  Government  Income  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 funds that invests in
U.S.  Treasury  securities from our Benham Group,  the American  Century--Benham
Inflation-Adjusted  Treasury Fund (the "Fund"), is described in this Prospectus.
Its investment objective is listed on page 2 of this Prospectus. The other funds
are described in separate prospectuses.

     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 September 3, 1996,  revised as of the date of this prospectus
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 o P.O. Box 419200
                Kansas City, Missouri 64141-6200 o 1-800-345-2021
                        International calls: 816-531-5575
                     Telecommunications Device for the Deaf:
                   1-800-634-4113 o In Missouri: 816-753-1865
                        Internet: 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).

     INVESTMENTS IN THE FUND ARE NOT INSURED OR GUARANTEED BY THE U.S.
GOVERNMENT OR ANY OTHER AGENCY.

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 INFLATION-ADJUSTED
TREASURY FUND

     Inflation-Adjusted Treasury seeks to provide a total return consistent with
investment in U.S. Treasury inflation-adjusted securities. 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

Transaction and Operating Expense Table...............................4


INFORMATION REGARDING THE FUND

Investment Policies of the Fund.......................................5
     Investment Strategy..............................................5
Risk Factors and Investment Techniques................................5
     Treasury Inflation-Adjusted Securities...........................6
     Development of Inflation-Adjusted
         Securities Market ...........................................7
     Share Price Volatility...........................................7
     Treasury Securities..............................................8
     Zero Coupon ("Stripped")
         Inflation-Adjusted Securities................................8
     Repurchase Agreements............................................8
Other Investment Practices, Their Characteristics
     and Risks........................................................8
     Portfolio Turnover...............................................8
     When-Issued And Forward Commitment
         Agreements...................................................8
     Cash Management..................................................8
     Other Techniques.................................................8
Performance Advertising...............................................9


HOW TO INVEST WITH AMERICAN CENTURY INVESTMENTS

American Century Investments.........................................10
Investing in American Century........................................10
How to Open an Account...............................................10
         By Mail.....................................................10
         By Wire.....................................................10
         By Exchange.................................................11
         In Person...................................................11
     Subsequent Investments..........................................11
         By Mail.....................................................11
         By Telephone................................................11
         By Online Access............................................11
         By Wire.....................................................11
         In Person...................................................11
     Automatic Investment Plan.......................................11
How to Exchange from One Account to Another..........................11
         By Mail.....................................................12
         By Telephone................................................12
         By Online Access............................................12
How to Redeem Shares.................................................12
         By Mail.....................................................12
         By Telephone................................................12
         By Check-A-Month............................................12
         Other Automatic Redemptions.................................12
     Redemption Proceeds.............................................12
         By Check....................................................12
         By Wire and ACH.............................................12
     Redemption of Shares in Low-Balance Accounts....................12
Signature Guarantee..................................................13
Special Shareholder Services.........................................13
         Automated Information Line..................................13
         Online Account Access.......................................13
         Open Order Service..........................................13
         Tax-Qualified Retirement Plans..............................14
Important Policies Regarding Your Investments........................14
Reports to Shareholders..............................................14
Employer-Sponsored Retirement Plans and
     Institutional Accounts..........................................15


ADDITIONAL INFORMATION YOU SHOULD KNOW

Share Price..........................................................16
     When Share Price Is Determined..................................16
     How Share Price Is Determined...................................16
     Where To Find Information About Share Price.....................16
Distributions........................................................17
Taxes    ............................................................17
     Tax-Deferred Accounts...........................................17
     Taxable Accounts................................................17
Management...........................................................18
     Investment Management...........................................18
     Code Of Ethics..................................................19
     Transfer And Administrative Services............................19
Distribution Of Fund Shares..........................................20
Expenses 20
Further Information About American Century...........................20

Prospectus                                              Table of Contents     3


                     TRANSACTION AND OPERATING EXPENSE TABLE

                                                              Inflation-Adjusted
                                                                   Treasury
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:(2)
(as a percentage of net assets)
Advisory Fees ....................................................       .27%
12b-1 Fees .......................................................       none
Other Expenses....................................................       .23%
Total Fund Operating Expenses.....................................       .50%

EXAMPLE:
You would pay the following expenses on a $1,000           1 year        $  5
investment, assuming a 5% annual return and               3 years          16
redemption at the end of each time period:                5 years         N/A
                                                         10 years         N/A

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

(2)  Estimated.  Benham  Management  Corporation  (the  "Manager") has agreed to
     limit each Fund's total operating expenses to specified percentages of each
     Fund's  average daily net assets.  The agreement  provides that the Manager
     may recover amounts  absorbed on behalf of the Fund during the preceding 11
     months if, and to the extent that, for any given month,  Fund expenses were
     less than the expense  limit in effect at that time.  The  current  expense
     limitation for the Fund is .50%. This expense  limitation  expires on March
     1, 1998. If the expense  limitation  was not in effect,  Other Expenses and
     Total Fund  Operating  Expenses  for the Fund are  estimated to be .43% and
     .70%, respectively.


     The Fund pays the Manager  investment  advisory fees equal to an annualized
percentage   of  its  average   daily  net  assets.   Other   expenses   include
administrative  and  transfer  agent  fees  paid to  American  Century  Services
Corporation.

     The purpose of the above 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  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.

4    Transaction and Operating Expense Table        American Century Investments


                         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  which  are  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.

INVESTMENT STRATEGY

     The Fund pursues its investment objective by investing, under normal market
conditions,  at least 65% of its total assets in  Inflation-Adjusted  Securities
that are backed by the full faith and credit of the U.S.  government and indexed
or  otherwise  structured  by the U.S.  Treasury to provide  protection  against
inflation.  Inflation-Adjusted  Securities may be issued by the U.S. Treasury in
the form of notes or bonds. Up to 35% of the Fund's total assets may be invested
in  Inflation-Adjusted   Securities  issued  by  U.S.  government  agencies  and
government-sponsored  organizations,  when such securities become available. The
Fund may also  invest  in U.S.  Treasury  securities  which are not  indexed  to
inflation for liquidity and total return, or if at any time the Manager believes
there is an inadequate  supply of appropriate  Inflation-Adjusted  Securities in
which to invest.  The Fund's  portfolio may consist of any  combination of these
securities consistent with investment strategies employed by the Manager.

     There are no maturity or duration  restrictions for the securities in which
the  Fund  may  invest.   The  U.S.  Treasury   initially  is  issuing  Treasury
Inflation-Adjusted  Securities with a 10-year term to maturity. It has announced
its intention (although there is no guarantee it will do so) to issue additional
securities  with a term to  maturity  as long as 30  years  and as short as five
years. When these securities of differing  maturity are issued, the Manager will
buy from among the  available  issues  those  securities  that will  provide the
maximum relative value to the Fund.

     The Fund may be appropriate for investors who are seeking to protect all or
a part of their investment portfolio from the effects of inflation.  Traditional
U.S.  Treasury  fixed-principal  notes and bonds pay a stated  return or rate of
interest in dollars and are redeemed at their par amount.  Inflation  during the
period the securities are outstanding will diminish the future  purchasing power
of these dollars.  The Fund is designed to serve as a vehicle to protect against
this diminishing effect.

     The Fund is designed to provide total return  consistent with an investment
in U.S.  Treasury  Inflation-Adjusted  Securities.  The Fund's income yield will
reflect both the inflation-adjusted interest income and the inflation adjustment
to principal  which are features of  Inflation-Adjusted  Securities.  The Fund's
yield will likely reflect "real rates" of interest (that is, the then-prevailing
current  interest rates minus the  then-prevailing  expectations  for inflation)
available in the Treasury market.  As a result,  the current income generated by
the  Fund is  expected  to be  substantially  below  that  of  more  traditional
government  securities funds,  such as Treasury bond funds or  government-agency
bond funds.

     Inflation-Adjusted  Securities  in  which  the  Fund  may  invest  are  new
securities.  There  are  special  investment  risks,  particularly  share  price
volatility and potential adverse tax consequences, associated with investment in
Inflation-Adjusted  Securities.  These  risks  are  described  in the  following
section.  You should read that section carefully to make sure you understand the
nature of the Fund before you invest in it.

RISK FACTORS AND INVESTMENT TECHNIQUES

     The  obligations  in which the Fund may invest will differ from one another
in their  interest  rates,  maturities,  dates of issuance and  interest-payment
schedules.  The pertinent features of the types of obligations in which the Fund
may invest are  described  in this  section.  To the extent that these  features
impact the value of Fund holdings,  they will in turn impact the net asset value
of the Fund.  While the Fund seeks to provide a measure of inflation  protection
to its  investors,  there is no  assurance  that the Fund will

Prospectus                                   Information Regarding the Fund    5


provide less risk than a fund investing in conventional fixed principal Treasury
securities.

TREASURY INFLATION-ADJUSTED SECURITIES

     Treasury Inflation-Adjusted Securities are Treasury securities with a final
value and  interest  payment  stream  linked  to the  inflation  rate.  Treasury
Inflation-Adjusted  Securities  may be  issued  in  either  note or  bond  form.
Treasury  inflation-adjusted notes have maturities of at least one year, but not
more than 10 years.  Treasury  inflation-adjusted  bonds have maturities of more
than 10 years.

     Treasury  Inflation-Adjusted  Securities  may be  attractive  to  investors
seeking an investment backed by the full faith and credit of the U.S. government
that provides a return in excess of the rate of inflation. According to the U.S.
Treasury,  Treasury  Inflation-Adjusted  Securities  are modeled after the "Real
Return Bonds" currently issued by the government of Canada. These securities are
new to the U.S.  market,  having  first  been  sold in  January  1997.  There is
uncertainty as to how these securities will be treated by the  marketplace.  See
"Development  of  Inflation-Adjusted  Securities  Market"  on page  7.  Treasury
Inflation-Adjusted Securities will be auctioned and issued on a quarterly basis.

STRUCTURE AND INFLATION INDEX

     The  principal  value of  Treasury  Inflation-Adjusted  Securities  will be
adjusted to reflect  changes in the level of inflation.  The index for measuring
the   inflation   rate  for  Treasury   Inflation-Adjusted   Securities  is  the
non-seasonally adjusted U.S. City Average All Items Consumer Price Index for All
Urban Consumers  published  monthly by the U.S.  Department of Labor's Bureau of
Labor Statistics.

     Semiannual  coupon interest  payments are made at a fixed percentage of the
inflation-adjusted  principal  value.  The coupon  rate or "real  yield" for the
semiannual interest payment of each issuance of securities will be determined at
the time the securities  are sold to the public.  While a reduction in inflation
will cause a reduction  in the  interest  payment  made on the  securities,  the
repayment of principal  at the  maturity of the  security is  guaranteed  by the
Treasury to be not less than the original  face or par amount of the security at
issuance.

INDEXING METHODOLOGY

     The  principal  value of  Treasury  Inflation-Adjusted  Securities  will be
indexed,  or  adjusted,  to account for  changes in the  Consumer  Price  Index.
Semiannual coupon interest payment amounts will be determined by multiplying the
inflation-adjusted  principal  amount by one-half the stated rate of interest on
each interest payment date.

TAXATION

     Taxation applicable to Treasury Inflation-Adjusted Securities is similar to
conventional  bonds. Both interest payments and the difference  between original
principal  and the  inflation-adjusted  principal  will be treated  as  interest
income  subject to taxation.  Interest  payments  are taxable  when  received or
accrued. The inflation adjustment to the principal is subject to tax in the year
adjustment  is made,  not at  maturity  of the  security  when the cash from the
repayment of principal is received. If an upward adjustment has been made (which
typically should happen),  investors in non-tax deferred accounts will pay taxes
on this  amount  currently.  Decreases  in the  indexed  principal  can  only be
deducted from current or previous interest payments reported as income.

     Treasury Inflation-Adjusted Securities therefore have a potential cash flow
mismatch   to  an   investor,   since   investors   must   pay   taxes   on  the
inflation-adjusted  principal before the repayment of principal is received.  It
is possible that,  particularly for high income tax bracket investors,  Treasury
Inflation-Adjusted  Securities  would not generate enough income in a given year
to cover the tax liability it could  create.  This is similar to the current tax
treatment  for zero coupon bonds and other  discount  securities.  If a Treasury
Inflation-Adjusted  Security is sold prior to maturity,  capital losses or gains
are realized in the same manner as traditional bonds.

     The Fund, however,  distributes all income on a monthly basis. Investors in
the Fund will receive  dividends which represent both the interest  payments and
the  principal  adjustments  of the  Inflation-Adjusted  Securities  held in its
portfolio.  An investment in the Fund may therefore be a means to avoid the cash
flow  mismatch  associated  with  a  direct  investment  in   Inflation-Adjusted
Securities.  For more  information  about  taxes and  their  effect on you as an
investor in the Fund, see "Taxes," on page 17.

U.S GOVERNMENT SECURITIES

     A number of U.S. government agencies and government-sponsored organizations
may issue Inflation-Adjusted Securities. These agencies generally are created by
Congress to fulfill a specific need, such as

6    Information Regarding the Fund               American Century Investments


providing credit to home buyers or farmers. Among these agencies are the Federal
Home Loan Banks,  the Federal  Farm Credit  Banks,  the Student  Loan  Marketing
Association and the Resolution Funding Corporation.

     Some agency  securities are backed by the full faith and credit of the U.S.
government,  and  some  are  guaranteed  only  by  the  issuing  agency.  Agency
securities  typically offer somewhat higher yields than comparable U.S. Treasury
securities  with  similar  maturities.  However,  these  securities  may involve
greater risk of default than securities backed by the U.S. Treasury.

     As of the date on which  this  Prospectus  was  drafted,  the  plans of the
various U.S. government agencies to issue Inflation-Adjusted Securities were not
known.  It is expected  that at least some U.S.  government  agencies will issue
Inflation-Adjusted   Securities  whose  design  mirrors  that  of  the  Treasury
Inflation-Adjusted Securities described on the previous page.

DEVELOPMENT OF INFLATION-ADJUSTED
SECURITIES MARKET

     The Treasury  securities  market is the largest and most liquid  securities
market in the world. The marketability of Treasury Inflation-Adjusted Securities
and  Inflation-Adjusted  Securities  generally  may be enhanced over time as the
Treasury  issues  additional  Treasury  Inflation-Adjusted  Securities  and more
investors participate in the market.

     The Fund will purchase  Inflation-Adjusted  Securities at auction or in the
secondary  market as the Manager deems  appropriate.  The  secondary  market for
Inflation-Adjusted  Securities may not be as active as the secondary  market for
Treasury  and  U.S.  government  agency  fixed-principal  notes  and  bonds.  In
addition,  Inflation-Adjusted  Securities may not be as widely traded or as well
understood as Treasury fixed-principal  securities, nor is it known at this time
exactly how the secondary market for Inflation-Adjusted Securities will develop.

     If the  number of  Inflation-Adjusted  Securities  market  participants  is
limited,  it may  result in larger  spreads  between  bid and asked  prices  for
Inflation-Adjusted  Securities  than the bid-asked  spreads for  fixed-principal
notes and bonds with similar  terms to  maturity.  Such larger  bid-ask  spreads
normally result in higher transactions costs and/or lower returns. If the market
does  not  develop  sufficient  liquidity,  large  buyers  or  sellers  of these
securities may disproportionately  negatively impact the value of the securities
and, hence, the Fund's net asset value.

     The  Manager  currently  believes  that the market  for  Inflation-Adjusted
Securities  will be  sufficient  to  permit  the Fund to pursue  its  investment
objective.  However,  should the market for Inflation-Adjusted  Securities prove
less active than anticipated by the Manager,  the Manager is authorized to treat
such an environment as an abnormal market condition. This means that the Manager
may purchase  other types of Treasury  securities in excess of 35% of the Fund's
total assets without seeking  shareholder  approval.  During such a period,  the
Fund will not be fully pursuing its investment objective.

SHARE PRICE VOLATILITY

     Inflation-Adjusted  Securities  are  designed  to offer a return  linked to
inflation,  thereby  protecting future purchasing power of the money invested in
them. Inflation-Adjusted Securities provide this "protected" return only if held
to maturity, however. In addition,  Inflation-Adjusted  Securities may not trade
at par value.  "Real"  interest  rates (the  market  rate of  interest  less the
anticipated  rate of  inflation)  change over time, as a result of many factors,
such as what investors are demanding as a true value for money.  When real rates
do change,  Inflation-Adjusted Securities prices will be more sensitive to these
changes than  conventional  bonds,  since these  securities were sold originally
based upon a "real"  interest rate that is no longer  prevailing.  Should market
expectations  for real  interest  rates  rise,  the price of  Inflation-Adjusted
Securities  and the share  price of the Fund will  fall.  Investors  in the Fund
should be prepared to accept not only this share price  volatility  but also the
possible adverse tax consequences it may cause.

     An investment in securities featuring  inflation-adjusted  principal and/or
interest  involves factors not associated with more traditional  fixed principal
securities. Such factors include the possibility that the inflation index may be
subject to significant  changes in interest rates, that changes in the index may
or may not correlate to changes in interest rates  generally or changes in other
indices, that the resulting interest may be greater or less than that payable on
other securities of similar maturities.  In the event of sustained deflation, it
is   possible   that  the   amount  of   semiannual   interest   payments,   the
inflation-adjusted  principal  of the  security  and the  value of the  stripped
components,  will  decrease.  If any of these  possibilities  are realized,  the
Fund's net asset value could be negatively affected.

Prospectus                                 Information Regarding the Fund    7


TREASURY SECURITIES

     Under certain  circumstances the Fund will invest in fixed principal amount
U.S. Treasury bills, notes,  zero-coupon bonds and other bonds. These securities
are  direct  obligations  of the U.S.  Treasury.  Treasury  bills  have  initial
maturities  of one year or  less,  Treasury  notes  from  two to 10  years,  and
Treasury  bonds more than 10 years.  These  securities  are issued  with a fixed
interest coupon rate and a fixed final value at maturity. Although U.S. Treasury
securities carry little principal risk if held to maturity,  the prices of these
securities  (like all debt  securities)  change between issuance and maturity in
response to fluctuating market interest rates.

ZERO COUPON ("STRIPPED")
INFLATION-ADJUSTED SECURITIES

     The  Fund  may  invest  in  zero  coupon  ("stripped")   Inflation-Adjusted
Securities if they become available.  Further  information about such securities
is currently contained in the Statement of Additional Information.

REPURCHASE AGREEMENTS

     The Fund may invest in repurchase agreements when such transactions present
an attractive  short-term return on cash that is not otherwise  committed to the
purchase of securities pursuant to the investment policies of the Fund.

     A  repurchase  agreement  occurs  when,  at the time the Fund  purchases an
interest-bearing  obligation,  the seller (a bank or a broker-dealer  registered
under  the  Securities  Exchange  Act of  1934)  agrees  to  repurchase  it on a
specified  date in the future at an  agreed-upon  price.  The  repurchase  price
reflects  an  agreed-upon  interest  rate  during the time the  Fund's  money is
invested in the security.

     Since  the  security  purchased  constitutes  security  for the  repurchase
obligation,  a repurchase  agreement can be considered a loan collat-eralized by
the security purchased.  The Fund's risk is the ability of the seller to pay the
agreed-upon repurchase price on the repurchase date. If the seller defaults, the
Fund may incur costs in  disposing  of the  collateral,  which would  reduce the
amount realized  thereon.  If the seller seeks relief under the bankruptcy laws,
the  disposition of the collateral may be delayed or limited.  To the extent the
value of the security decreases, the Fund could experience a loss.

     The Fund may invest in repurchase  agreements  with respect to any security
in which it is authorized to invest.

OTHER INVESTMENT PRACTICES, THEIR CHARACTERISTICS
AND RISKS

     For additional  information regarding the investment practices of the Fund,
see the Statement of Additional Information.

PORTFOLIO TURNOVER

     Investment  decisions  to  purchase  and sell  securities  are based on the
anticipated  contribution  of the security in question to the Fund's  objective.
The Manager  believes that the rate of portfolio  turnover is irrelevant when it
determines a change is in order to achieve this objective and, accordingly,  the
annual portfolio turnover rate cannot be accurately anticipated.

     The  portfolio  turnover of the Fund may be higher than other  mutual funds
with   similar   investment   objectives.   Higher   turnover   would   generate
correspondingly  greater  transaction costs that are borne directly by the Fund.
Portfolio  turnover  may also affect the  character  of capital  gains,  if any,
realized and distributed by the Fund since short-term  capital gains are taxable
as ordinary income.

WHEN-ISSUED AND FORWARD COMMITMENT AGREEMENTS

     The Fund may purchase new issues of securities on a when-issued  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  commitment to purchase is made.  Delivery
of and payment  for these  securities  typically  occurs 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  security.
Accordingly,  the value of each  security may decline  prior to delivery,  which
could result in a loss to the Fund.

CASH MANAGEMENT

     For cash management purposes,  the Fund may invest up to an aggregate total
of 5% of its total  assets in any money  market  fund  advised  by the  Manager,
provided that the investment is consistent with the Fund's  investment  policies
and restrictions.

OTHER TECHNIQUES

     The Manager may buy other types of  securities  or employ  other  portfolio
management techniques on behalf of the Fund. When SEC guidelines require it to

8   Information Regarding the fund                American Century Investments


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,
effective yield and tax-equivalent yield.

     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 a fund's  cumulative  total  return  over the same  period if the
fund's performance had remained constant throughout.

     A  quotation  of yield  reflects  a  fund's  income  over a  stated  period
expressed as a percentage  of the fund's share  price.  Yield is  calculated  by
adding over a 30-day (or one-month) period all interest and dividend income (net
of fund expenses)  calculated on each day's market values,  dividing this sum by
the average number of fund shares  outstanding during the period, and expressing
the  result as a  percentage  of the fund's  share  price on the last day of the
30-day (or one month) period.  The percentage is then annualized.  Capital gains
and  losses  are  not  included  in the  calculation.  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. The SEC yield should be regarded as an estimate of
the Fund's rate of  investment  income,  and it may not equal the Fund's  actual
income  distribution  rate,  the income paid to a  shareholder's  account or the
income reported in the Fund's financial statements.

     A tax-equivalent  yield demonstrates the taxable yield necessary to produce
after-tax  yield  equivalent  to that of a mutual  fund which  invests in exempt
obligations.  The Fund may quote  tax-equivalent  yield,  which show the taxable
yield an investor  would have to earn before taxes to equal the Fund's  tax-free
yield. As a prospective  investor in the Fund, you should determine whether your
tax-equivalent  yield is likely to be higher with a taxable or with a tax-exempt
fund. To determine this, you may use the formulas depicted below.

     You can  calculate  your  tax-equivalent  yield for the Fund  (taking  into
account only federal income taxes and not any applicable  state taxes) using the
following equation:

     Fund's State Tax-Free Yield                   Your Tax-
     ---------------------------
         100% - State Tax Rate         =       Equivalent Yield

     The Fund may also 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  Donoghue'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  Donoghue's  Money Fund Average and Bank Rate Monitor
National Index of 21/2 year CD rates. Fund performance may also be compared,  on
a  relative  basis,  to the  other  funds  in our  fund  family.  This  relative
comparison,  which may be based upon  historical or expected  fund  performance,
volatility  or  other  fund  characteristics,   may  be  presented  numerically,
graphically or in text.  Fund  performance  may also 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.

Prospectus                                 Information Regarding the Fund    9


                               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.

INVESTING IN AMERICAN CENTURY

     The following  section  explains 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 15.

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 IRAs).

     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:

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

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

o   BENEFICIARY ACCOUNT NUMBER (BNF ACCT):
    2804918

o   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.

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

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

    o Taxpayer identification or Social Security number

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

    o Current tax year, previous tax year or rollover designation if
      an IRA. Specify whether IRA, SEP-IRA or SARSEP-IRA.

Prospectus                  How To Invest with American Century Investment  10


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
below for more information on exchanges.

IN PERSON

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

     4500 Main Street
     Kansas City, Missouri 64111

     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:  $250 for checks  submitted  without  the  remittance  portion of a
previous  statement  or  confirmation,  $50 for all  other  types of  subsequent
investments.

BY MAIL

     When making subsequent investments,  enclose your check with the remittance
portion of the confirmation of a previous investment.  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 10 and indicate your account number.

IN PERSON

     You may make  subsequent  investments  in  person  at one of our  Investors
Centers. The locations of our three Investors 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 one of our Investor Services Representatives.

HOW TO EXCHANGE FROM ONE ACCOUNT TO ANOTHER

     As long as you meet any minimum initial  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 the same day it is received if it
is received  before the fund's net asset value is calculated,  which is one hour
prior to the close of the New York  Stock  Exchange  for the  funds in  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 16.

     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.

11 How To Invest with American Century Investments  American Century Investments


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 13) 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 to you upon request,  or by a letter to us.
Certain  redemptions  may require a signature  guarantee.  Please see "Signature
Guarantee," page 13.

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

     If you have at least a $10,000  balance  in your  account,  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

     If you have at least a $10,000  balance in your  account,  you may elect to
make  redemptions  automatically by authorizing us to send funds directly to you
or to your account at a bank or other financial institution. To set up automatic
redemptions, call one of our Investor Services Representatives.

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.

     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 of the necessity to bring
the value of the shares held in the account up to the minimum. If action

Prospectus                How To Invest with American Century Investments   12


is not taken within 90 days of the letter's date, the shares held in the account
will be redeemed and 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 will be required
when:
     o   redeeming more than $25,000; or
     o   establishing or increasing a Check-A-Month or automatic transfer
         on an existing account.

     You may 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  your  fund's  daily  share  prices,  receive
updates on major market indexes and view  historical  performance of your funds.
If you select "Full  Services" on your  application,  you can use your  personal
access code and Social Security number to view your account balances and account
activity,  make subsequent investments from your bank account or exchange shares
from one fund to another.

OPEN ORDER SERVICE

     Through our open order  service,  you may designate a price at which to buy
shares of a variable-priced fund by exchange from one of our money market funds,
or a price at which to sell shares of a variable-priced  fund by exchange to one
of our money market funds.  The  designated  purchase  price must be equal to or
lower, or the designated sale price equal to or higher, than the variable-priced
fund's net asset value at the time the order is placed.  If the designated price
is  met  within  90  calendar   days,  we  will  execute  your  exchange   order
automatically at that price (or better). Open orders not executed within 90 days
will be canceled.

     If the fund you have selected deducts a distribution  from its share price,
your order  price will be  adjusted  accordingly  so the  distribution  does not
inadvertently trigger an open-order  transaction on your behalf. If you close or
re-register  the  account  from which the shares are to be  redeemed,  your open
order will be canceled.

     Because  of  their  time-sensitive  nature,  open  order  transactions  are
accepted  only by  telephone  or in person.  These  transactions  are subject to
exchange limitations described in each fund's prospectus, except that orders and
cancellations  received  before 2 p.m.  Central time are effective the same day,
and orders or cancellations received after 2 p.m. Central time are effective the
next business day.

13 How To Invest with American Century Investments  American Century Investments


TAX-QUALIFIED RETIREMENT PLANS

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

     o Individual Retirement Accounts ("IRAs");

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

     o 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 can also 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 may also 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  investment  advisor  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.

(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
     Investors Centers.  You may also 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.

Prospectus                 How To Invest with American Century Investments  14


     With the exception of most  automatic  transactions,  each time you invest,
redeem,  transfer or exchange  shares,  we will send you a  confirmation  of the
transactions. 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 31st 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.

15 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  American  Century  Target
Maturities  Trust, net asset value is determined at the close of regular trading
on each day that the New York Stock  Exchange  is open,  usually 3 p.m.  Central
time. Net asset value for Target  Maturities is 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 or redemption
or exchange request. For example, investments and requests to redeem or exchange
shares of a fund  received by us or one of our agents before the net asset value
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  on the next day the  Exchange  is open.

     Investments are considered received only when your check or wired funds are
received  by us.  Wired  funds  are  considered  received  on the day  they  are
deposited in our bank account if they are  deposited  before the net asset value
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 before the net asset value 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 Funds' 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  arrangement  with the
Fund or the Fund's distributor in order for you to receive that day's price.

HOW SHARE PRICE IS DETERMINED

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

     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  are  generally  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.

     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.

WHERE TO FIND INFORMATION ABOUT SHARE PRICE

     The net  asset  values of the funds are  published  in  leading  newspapers
daily.  The net asset value, as well as yield  information on the Fund and other
funds in the American  Century family of funds, may be obtained by calling us or
by accessing our Web site at www.americancentury.com.

Prospectus                           Additional Information You should Know 16


DISTRIBUTIONS

     At the close of each day including  Saturdays,  Sundays and  holidays,  net
income of the Fund, including amounts attributable to increases in the principal
amount  of  Inflation-Adjusted  Securities,  is  determined  and  declared  as a
distribution. The distribution will be paid monthly.

     You will  begin to  participate  in the  distributions  the day after  your
purchase is  effective.  See "When Share Price is  Determined,"  page 16. If you
redeem  shares,  you will receive the  distribution  declared for the day of the
redemption.  If all shares are redeemed, the distribution on the redeemed shares
will be included with your redemption proceeds.

     Distributions  from net  realized  capital  gains,  if any,  generally  are
declared  and paid once a year,  but the Fund may make  distributions  on a more
frequent  basis to comply with the  distribution  requirements  of the  Internal
Revenue Code, in all events in a manner  consistent  with the  provisions of the
1940 Act.

     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 Individual Retirement Accounts and
403(b)  plans  paid  in  cash  only  if you  are at  least  591/2  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.

     A  distribution  of shares of the Fund does not  increase the value of your
shares or your total return. At any given time the value of your shares includes
the  undistributed  net  gains,  if any,  realized  by the  Fund on the  sale of
portfolio securities,  and undistributed  dividends and interest received,  less
Fund expenses.

     Because such gains and  dividends are included in the value of your shares,
when they are  distributed  the value of your shares is reduced by the amount of
the  distribution.  If you buy your shares through a taxable account just before
the distribution,  you will pay the full price for your shares, and then receive
a portion of the purchase price back as a taxable distribution.

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 taxes.

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 of the
Fund does not qualify for the 70% dividends-received  deduction for corporations
since they are derived  from  interest  income.  Dividends  representing  income
derived from tax-exempt bonds generally retain the bonds'  tax-exempt  character
in a shareholder's  hands.  Distributions  from net long-term  capital gains are
taxable as long-term  capital  gains  regardless  of the length of time you have
held the shares on which such distributions are paid.  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 to you with respect to such shares.

     Inflation-Adjusted  Securities  purchased  by the  Fund  accrue  additional
interest  for federal  income tax  purposes in addition to the current  interest
paid. This additional  interest is commonly referred to as "imputed income." The
Fund must  distribute  this imputed income to  shareholders  as ordinary  income
dividends, which are subject to federal taxes but gen-

17  Additional Information You Should Know          American Century Investments


erally  exempt from state taxes.  In periods of high  inflation,  it is possible
that the imputed income earned by the Fund will exceed current interest earned.

     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 capital gain 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.

     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  may also 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,  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, and is not refundable.

     Redemption of shares of the Fund (including redemptions made in an exchange
transaction)  will be a taxable  transaction for federal income tax purposes and
shareholders  will generally  recognize a gain or loss in an amount equal to the
difference  between  the basis of the shares and the amount  received.  Assuming
that  shareholders hold such shares as a capital asset, the gain or loss will be
a capital gain or loss and will generally be long term if shareholders have held
such  shares for a period of more than one year.  If a loss is  realized  on the
redemption of Fund shares,  the reinvestment in additional Fund shares within 30
days before or after the  redemption  may be subject to the "wash sale" rules of
the Internal  Revenue Code,  resulting in a postponement  of the  recognition of
such loss for federal income tax purposes.

MANAGEMENT

INVESTMENT MANAGEMENT

     The Fund is a series of the American  Century  Government  Income Trust,  a
Massachusetts  business  trust formerly  known as the Benham  Government  Income
Trust (the "Trust"), and is officially designated as "American Century -- Benham
Treasury Inflation-Adjusted Securities Fund." 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  advisory  agreement entered into with the
Trust,  Benham Manage-ment  Corporation (the "Manager") serves as the investment
advisor of the Fund. Its principal  place of business is 1665  Charleston  Road,
Mountain  View,  California  94043.  The Manager has been  providing  investment
advisory services to investment companies and other clients since 1971.

     In June 1995,  American Century  Companies,  Inc. ("ACC"),  acquired Benham
Management Inter-national,  Inc., the then-parent company of the Manager. ACC is
the parent company of American Century  Investment  Management,  Inc.  ("ACIM"),
which  provides  investment  advisory  services  to many  funds in the  American
Century family of funds. In the  acquisition,  the Manager became a wholly owned
subsidiary of ACC. Certain employees of the Manager

Prospectus                             Additional Information You Should Know 18


provide investment  management  services to funds managed by ACIM, while certain
ACIM employees provide  investment  management  services to funds advised by the
Manager.

     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 and the Fund's asset mix 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  member of the team  managing the Fund  described in
this Prospectusand his work experience for the last five years is as follows:

     DAVID  SCHROEDER  joined  the  Manager  in  1990  and  has  been  primarily
responsible for the day-to-day operations of the Fund since its inception and is
in charge of the team  managing  the Fund.  Mr.  Schroeder  also has managed the
American Century--Benham Intermediate-Term Treasury Fund since January 1992, the
American  Century--Benham  Long-Term  Treasury Fund since  September  1992,  and
American  Century Target  Maturities  Trust since July 1990.  Mr.  Schroeder has
co-managed the American Century--Benham GNMA Fund since January 1996.

     The  activities  of the  Manager  are  subject  only  to  direction  of the
Trustees.  Each  series of the  Trust  pays the  Manager  a  monthly  investment
advisory  fee equal to its pro rata  share of the  dollar  amount  derived  from
applying  the Trust's  average  daily net assets to an  investment  advisory fee
schedule.

     The  investment  advisory  fee rate  ranges  from 0.50% to 0.19% of average
daily net assets, dropping as the Fund's assets increase.

CODE OF ETHICS

     The Fund and the Manager  have  adopted a Code of Ethics,  which  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 portfolio
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 the  Fund
shareholders come before the interests of the people who manage the Fund.

TRANSFER AND ADMINISTRATIVE SERVICES

     American  Century  Services  Corporation,  4500 Main  Street,  Kansas City,
Missouri,   64111,   (the   "transfer   agent")  acts  as  transfer   agent  and
dividend-paying  agent for the Fund.  The transfer  agent  provides  facilities,
equipment  and  personnel to the Fund and is paid for such services by the Fund.
For  administrative  services,  the Fund pays the  transfer  agent a monthly fee
equal to its pro rata share of the  dollar  amount  derived  from  applying  the
average  daily net  assets  of all of the  funds  advised  by the  Manager.  The
administrative  fee rate ranges from 0.11% to 0.08% of average daily net assets,
dropping as assets advised by the Manager increase. For transfer agent services,
each Fund pays the  transfer  agent a monthly fee for each  shareholder  account
maintained and for each shareholder transaction executed during that month.

     The Fund charges no sales  commissions,  or "loads," of any kind.  However,
investors  who do not choose to purchase or sell Fund shares  directly  from the
transfer   agent  may   purchase   or  sell  Fund  shares   through   registered
broker-dealers and other qualified service  providers,  who may charge investors
fees for their services.  These  broker-dealers and service providers  generally
provide  shareholder,  administrative  and/or accounting  services,  which would
otherwise be provided by the transfer agent. To accommodate these investors, the
Manager and its affiliates have entered into agreements with some broker-dealers
and service  providers to provide  these  services.  Fees for such  services are
borne  normally by the Fund at the rates  normally  paid to the transfer  agent,
which would otherwise provide the services. Any distribution expenses associated
with these arrangements are borne by the Manager.

19   Additional Information You Should Know         American Century Investments


     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 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.

DISTRIBUTION OF FUND SHARES

     The Fund's shares are distributed by American Century Investment  Services,
Inc. (the  "Distributor"),  a registered  broker-dealer  and an affiliate of the
Manager. The Manager pays all expenses for promoting and distributing the Fund's
shares  offered by this  Prospectus.  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.

EXPENSES

     The Fund pays  certain  operating  expenses  directly,  including,  but not
limited to: custodian,  audit, and legal fees; fees of the independent Trustees;
costs  of  printing  and  mailing   prospectuses,   statements   of   additional
information, proxy statements,  notices, and reports to shareholders;  insurance
expenses;  and costs of registering the Fund's shares for sale under federal and
state  securities  laws. See the Statement of Additional  Information for a more
detailed discussion of independent Trustee compensation.

FURTHER INFORMATION ABOUT AMERICAN CENTURY

     The Trust was organized as a Massachusetts business trust on July 24, 1985.
The  Trust is a  diversified,  open-end  management  investment  company.  Their
business  and affairs are managed by its  officers  under the  direction  of the
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 made
by mail should be directed to the address and phone numbers on the cover, or
by phone to 1-800-345-2021. (international calls: 816-531-5575.)

     The Fund is an  individual  series of the Trust which issues shares with no
par value.  The assets belonging to each series of shares are held separately by
the custodian and in effect each series is a separate fund.

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

     Shares of the Trust have noncumulative  voting rights, which means that the
holders of more than 50% of the shares  voting for the  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 1940 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 members  of their  Boards 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 that the
Trust hold a special  meeting  of  shareholders.  The Trust  will  assist in the
communication with other shareholders.

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

     THIS PROSPECTUS CONSTITUTES AN OFFER TO SELL SECURITIES OF THE FUND ONLY IN
THOSE STATES WHERE THE FUND'S SHARES HAVE BEEN REGISTERED OR OTHERWISE QUALIFIED
FOR SALE. THE FUND WILL NOT ACCEPT  APPLICATIONS FROM PERSONS RESIDING IN STATES
WHERE THE FUND'S SHARES ARE NOT REGISTERED.

Prospectus                          Additional Information You Should Know  20


                                      NOTES

Prospectus                                                           Notes  21


P.O. Box 419200
Kansas City, Missouri
64141-6200

Person-to-person assistance:
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 816-753-1865

Fax: 816-340-7962

Internet: www.americancentury.com




                            [American Century logo]
                                    American
                                  Century(sm)


9702           [recycled logo]
SH-BKT-6963       Recycled





                       STATEMENT OF ADDITIONAL INFORMATION


                            [american century logo]
                                    American
                                  Century(sm)


                                SEPTEMBER 3, 1996
                            Revised FEBRUARY 10, 1997



                                     BENHAM
                                    GROUP(R)


                                Government Agency
                               Short-Term Treasury
                           Intermediate-Term Treasury
                               Long-Term Treasury
                                    ARM Fund
                                    GNMA Fund
                           Inflation-Adjusted Treasury



                                 [front cover]



                       STATEMENT OF ADDITIONAL INFORMATION
                                SEPTEMBER 3, 1996
                            REVISED FEBRUARY 10, 1997

                    AMERICAN CENTURY GOVERNMENT INCOME TRUST

     This Statement is not a prospectus  but should be read in conjunction  with
the Funds' current Prospectuses dated September 3, 1996, revised January 1, 1997
(except  Inflation-Adjusted  Treasury,  which is dated  February 10, 1997).  The
Funds' annual reports for the fiscal year ended March 31, 1996 are  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...................................................8
Portfolio Transactions...................................................14
Valuation of Portfolio Securities........................................14
Performance..............................................................15
Taxes....................................................................17
About the Trust..........................................................17
Trustees and Officers....................................................18
Investment Advisory Services.............................................19
Transfer and Administrative Services.....................................21
Distribution of Fund Shares..............................................22
Direct Fund Expenses.....................................................22
Expense Limitation Agreement.............................................22
Additional Purchase and Redemption
   Information...........................................................23
Other Information........................................................24

     NOTE: Throughout this document, Short-Term Treasury, Intermediate-Term
Treasury, Long-Term Treasury, ARM Fund, GNMA Fund and Inflation-Adjusted
Treasury are referred to collectively as the "Variable-Price Funds."

Statement of Additional Information                                         1


INVESTMENT POLICIES AND TECHNIQUES

     The following  pages 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.

REPURCHASE AGREEMENTS (VARIABLE-PRICE FUNDS)

     The  Funds may  engage  in  repurchase  agreements  collateralized  by U.S.
Treasury bills, notes, and bonds, or by mortgage-backed GNMA certificates, which
are guaranteed by the Government National Mortgage Association and backed by the
full faith and credit of the U.S. government.

     Repos may involve  risks not  associated  with direct  investments  in U.S.
government  debt  securities.  If the seller  fails to complete the terms of the
agreement,  the Fund may experience delays in recovering its cash or incur costs
in the disposal of  securities it has purchased  under the  agreement.  The Fund
could also suffer a loss if the  securities  decline in value before they can be
sold in the open market.

     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. Delay or losses could result if the other party
to the agreement defaults or becomes bankrupt.

     Benham  Management  Corporation,  (the "Manager")  attempts to minimize the
risks  associated  with  repurchase  agreements  by  adhering  to the  following
criteria:

(1)  Limiting  the  securities  acquired  and  held  by a  Fund  underrepurchase
     agreements to U.S. government securities;

(2)  Entering  into  repurchase  agreements  only with  primary  dealersin  U.S.
     government  securities  (including bank  affiliates)  that are deemed to be
     creditworthy  under  guidelines   established  bya  nationally   recognized
     statistical  rating  organization  (a "rating  agency") and approved by the
     Funds' Board of Trustees;

(3)  Monitoring  the  creditworthiness  of  all  firms  involved  in  repurchase
     agreement transactions;

(4)  Requiring the seller to establish and maintain  collateral equal to 102% of
     the agreed upon resale price,  provided  however that the Board of Trustees
     may determine that a broker-dealer's credit standing is sufficient to allow
     collateral to fall to as low as 101% of the agreed upon resale price before
     the broker-dealer deposits additional securities with the Funds' custodian;

(5)  Investing  no  more  than  10%  of a  Fund's  total  assets  in  repurchase
     agreements  of more than seven  days'  duration  (although  the  underlying
     securities usually will have longer maturities);

(6)  Taking delivery of securities subject to repurchase  agreements and holding
     them in a segregated account at the Funds' custodian bank.

     The  Funds  have  received  permission  from the  Securities  and  Exchange
Commission (SEC) to participate in pooled repurchase  agreements  collateralized
by U.S. government  securities with other mutual funds advised by the Manager or
its affiliates. Pooled repos are expected to increase the income a Fund can earn
from repo  transactions  without  increasing  the risks  associated  with  these
transactions.

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

WHEN-ISSUED PURCHASES AND FORWARD
COMMITMENTS (ALL FUNDS)

     The Funds 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 15 to 45 days later).

     When purchasing  securities on a when-issued or forward  commitment  basis,
each Fund assumes the rights and risks of ownership, including the risk of price
and yield  fluctuations.  Although a 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, a
Fund will establish and

2                                                   American Century Investments


maintain until the settlement date a segregated account consisting of cash, U.S.
government securities, or other high-quality liquid debt securities in an amount
sufficient  to meet the  purchase  price.  When  the time  comes to pay for such
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.

ROLL TRANSACTIONS

     A 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,  a  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 broker-dealer may seek to purchase a particular  security that a 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.  As  an  operating  policy,  the  Manager  limits  forward  commitment
transactions  (including roll  transactions) to 35% of a Fund's total assets and
will  not  enter  into  when-issued  or  forward  commitment  transactions  with
settlement dates that exceed 120 days.

     In  engaging  in roll  transactions,  the  Fund  will  maintain  until  the
settlement date a segregated  account  consisting of cash, cash equivalents,  or
high-quality  liquid  securities  in an amount  sufficient  to meet the purchase
price, as described above.

INTEREST RATE RESETS ON FLOATING-RATE
U.S. GOVERNMENT AGENCY SECURITIES

     Interest rate resets on floating-rate  U.S.  government  agency  securities
generally  occur at  intervals  of one year or less in  response to changes in a
predetermined  interest  rate index.  There are two main  categories of indexes,
those based on U.S.  Treasury  securities  and those  derived  from a calculated
measure,  such as a cost of funds  index.  Commonly  used  indexes  include  the
three-month,  six-month,  and one-year Treasury bill rate; the two-year Treasury
note yield;  the  Eleventh  District  Federal Home Loan Bank Cost of Funds Index
(EDCOFI);  and the London  Interbank  Offered Rate (LIBOR).  Fluctuations in the
prices  of  floating-rate  U.S.   government  agency  securities  are  typically
attributed  to  differences  between the coupon  rates on these  securities  and
prevailing market interest rates between interest rate reset dates.

MASTER DEMAND NOTES
(GOVERNMENT AGENCY ONLY)

     Government Agency may acquire  variable-rate  master demand notes issued by
U.S. government agencies such as the Student Loan Marketing Association.  Master
demand  notes allow the Fund to lend money at varying  rates of  interest  under
direct agreements with borrowers. The Fund may adjust the amount of money loaned
under a master  demand note daily or weekly up to the full amount  specified  in
the  agreement,  and the  borrower  may prepay up to the full amount of the loan
without penalty. Master demand notes may or may not be backed by bank letters of
credit.  Although, as direct agreements between lenders and borrowers,  there is
no secondary  market for master demand notes,  these  instruments are redeemable
(immediately  repayable by the  borrower)  at par plus  accrued  interest at any
time.

SECURITIES LENDING (ALL FUNDS EXCEPT
INTERMEDIATE-TERM TREASURY)

     The  Manager  may seek  approval  from the Board of  Trustees  to engage in
securities  lending  on behalf of the Funds.  Such loans  would be made with the
intention  of  allowing  the  Funds to earn  additional  income.  If a  borrower
defaulted on a securities  loan,  the lending  Fund could  experience  delays in
recovering  the  securities  it loaned;  if the value of the  loaned  securities
increased in the meantime, the Fund could suffer a loss. To minimize the risk of
default on securities  loans,  the Manager  adheres to the following  guidelines
prescribed by the Board of Trustees:

(1)  TYPE AND AMOUNT OF COLLATERAL. At the time a loan is made, the Fund must
     receive, from or on

Statement of Additional Information                                          3


     behalf of a borrower,  collateral consisting of any combination of cash and
     full faith and credit  U.S.  government  securities  equal to not less than
     102% of the market value of the securities loaned. Cash collateral received
     by a  Fund  in  connection  with  loans  of  portfolio  securities  may  be
     commingled  by  the  Funds'   custodian  with  other  cash  and  marketable
     securities,   provided  that  the  loan  agreement  expressly  allows  such
     commingling.

(2)  ADDITIONS TO COLLATERAL. Collateral must be marked to market daily, and the
     borrower must agree to add  collateral to the extent  necessary to maintain
     the 102% level specified in guideline (1) above.  The borrower must deposit
     additional collateral no later than the business day following the business
     day on which a collateral  deficiency  occurs or  collateral  appears to be
     inadequate.

(3)  TERMINATION OF LOAN. The Fund must have the option to terminate a loan of
     portfolio securities at any time. The borrower must be obligated to
     redeliver the borrowed securities within the normal settlement period
     following receipt of the termination notice. The normal settlement period
     for U.S. government securities is typically two trading days.

(4)  REASONABLE  RETURN ON LOAN.  The borrower must agree that the Fund (a) will
     receive  all  dividends,   interest,   or  other  distributions  on  loaned
     securities and (b) will be paid a reasonable return on such loans either in
     the form of a loan fee or premium or from the retention by the Fund of part
     or all of the earnings and profits  realized  from the  investment  of cash
     collateral in full faith and credit U.S. government securities.

(5)  LIMITATIONS ON PERCENTAGE OF FUND ASSETS ON LOAN. A Fund's loans may not
     exceed 331/3% of its total assets.

(6)  CREDIT ANALYSIS.  As part of the regular monitoring procedures set forth by
     the Board of  Trustees  that the  Manager  follows  to  evaluate  banks and
     broker-dealers in connection with, for example,  repurchase  agreements and
     municipal  securities  credit issues,  the Manager will analyze and monitor
     the   creditworthiness  of  all  borrowers  with  which  portfolio  lending
     arrangements are contemplated or entered into.

MORTGAGE-BACKED SECURITIES (ARM FUND
AND GNMA FUND)

     BACKGROUND.  A mortgage-backed security represents an ownership interest in
a pool of  mortgage  loans.  The loans  are made by  financial  institutions  to
finance home and other real estate purchases. As the loans are repaid, investors
receive payments of both interest and principal.

     Like fixed-income  securities such as U.S. Treasury bonds,  mortgage-backed
securities pay a stated rate of interest over the life of the security. However,
unlike  a bond,  which  returns  principal  to the  investor  in one lump sum at
maturity,  mortgage-backed  securities  return  principal  to  the  investor  in
increments over the life of the security.

     Because the timing and speed of principal repayments vary, the cash flow on
mortgage  securities  is  irregular.  If  mortgage  holders  sell  their  homes,
refinance their loans,  prepay their  mortgages,  or default on their loans, the
principal is distributed pro rata to investors.

     As with other fixed-income  securities,  the prices of mortgage  securities
fluctuate in response to changing  interest rates; when interest rates fall, the
prices of mortgage securities rise, and vice versa. Changing interest rates have
additional  significance  for  mortgage-backed  securities  investors,  however,
because they influence  prepayment  rates (the rates at which  mortgage  holders
prepay  their  mortgages),  which in turn  affect the yields on  mortgage-backed
securities.  When interest rates decline,  prepayment rates generally  increase.
Mortgage  holders take advantage of the opportunity to refinance their mortgages
at lower rates with lower monthly payments.  When interest rates rise,  mortgage
holders are less inclined to refinance their mortgages. The effect of prepayment
activity on yield depends on whether the mortgage-backed  security was purchased
at a premium or at a discount.

     A  Fund  may  get  back  principal  sooner  than  it  expected  because  of
accelerated  prepayments.  Under  these  circumstances,  the Fund  might have to
reinvest  returned  principal  at rates  lower  than it  would  have  earned  if
principal payments were made on schedule. Conversely, a mortgage-backed security
may exceed its anticipated  life if prepayment  rates  decelerate  unexpectedly.
Under these circumstances, a Fund

4                                                American Century Investments


might miss an opportunity to earn interest at higher prevailing rates.

     GINNIE MAE CERTIFICATES. The Government National Mortgage Association (GNMA
or Ginnie Mae) is a wholly owned corporate  instrumentality of the United States
within the Department of Housing and Urban Development. The National Housing Act
of 1934 (Housing Act), as amended, authorizes Ginnie Mae to guarantee the timely
payment of interest and repayment of principal on  certificates  that are backed
by a pool of mortgage loans insured by the Federal Housing  Administration under
the  Housing  Act,  or by Title V of the  Housing  Act of 1949 (FHA  Loans),  or
guaranteed by the Veterans'  Administration under the Servicemen's  Readjustment
Act of 1944 (VA  Loans),  as  amended,  or by pools of other  eligible  mortgage
loans.  The  Housing  Act  provides  that the full  faith and credit of the U.S.
government  is pledged to the payment of all amounts  that may be required to be
paid under any guarantee.  Ginnie Mae has unlimited authority to borrow from the
U.S. Treasury in order to meet its obligations under this guarantee.

     Ginnie Mae certificates  represent a pro rata interest in one or more pools
of the following types of mortgage loans:  (a) fixed-rate level payment mortgage
loans; (b) fixed-rate  graduated  payment mortgage loans (GPMs);  (c) fixed-rate
growing equity mortgage loans (GEMs);  (d) fixed-rate  mortgage loans secured by
manufactured (mobile) homes (MHs); (e) mortgage loans on multifamily residential
properties  under   construction   (CLCs);   (f)  mortgage  loans  on  completed
multifamily  projects  (PLCs);  (g) fixed-rate  mortgage loans that use escrowed
funds to reduce the borrower's  monthly  payments  during the early years of the
mortgage loans (buydown mortgage loans); and (h) mortgage loans that provide for
payment  adjustments  based on periodic  changes in  interest  rates or in other
payment terms of the mortgage loans.

     FANNIE MAE CERTIFICATES. The Federal National Mortgage Association (FNMA or
Fannie Mae) is a federally chartered and privately owned corporation established
under the Federal  National  Mortgage  Association  Charter Act.  Fannie Mae was
originally  established in 1938 as a U.S.  government agency designed to provide
supplemental  liquidity  to  the  mortgage  market  and  was  reorganized  as  a
stockholder-owned  and privately managed  corporation by legislation  enacted in
1968. Fannie Mae acquires capital from investors who would not ordinarily invest
in  mortgage  loans  directly  and  thereby  expands  the total  amount of funds
available for housing.  This money is used to buy home mortgage loans from local
lenders, replenishing the supply of capital available for mortgage lending.

     Fannie Mae certificates  represent a pro rata interest in one or more pools
of FHA Loans, VA Loans,  or, most commonly,  conventional  mortgage loans (i.e.,
mortgage loans that are not insured or guaranteed by a  governmental  agency) of
the following types: (a) fixed-rate level payment mortgage loans; (b) fixed-rate
growing equity mortgage loans; (c) fixed-rate  graduated payment mortgage loans;
(d) adjustable-rate mortgage loans; and (e) fixed-rate mortgage loans secured by
multifamily projects.

     Fannie Mae  certificates  entitle the registered  holder to receive amounts
representing  a pro rata interest in scheduled  principal and interest  payments
(at the  certificate's  pass-through  rate,  which is net of any  servicing  and
guarantee fees on the underlying mortgage loans), any principal prepayments, and
a  proportionate  interest in the full  principal  amount of any  foreclosed  or
otherwise  liquidated mortgage loan. The full and timely payment of interest and
repayment of principal on each Fannie Mae  certificate  is  guaranteed by Fannie
Mae;  this  guarantee  is not  backed by the full  faith and  credit of the U.S.
government.

     FREDDIE MAC CERTIFICATES. The Federal Home Loan Mortgage Corporation (FHLMC
or Freddie  Mac) is a corporate  instrumentality  of the United  States  created
pursuant to the  Emergency  Home  Finance Act of 1970 (FHLMC  Act),  as amended.
Freddie  Mac  was  established  primarily  for the  purpose  of  increasing  the
availability of mortgage credit.  Its principal  activity consists of purchasing
first-lien conventional  residential mortgage loans (and participation interests
in such mortgage loans) and reselling these loans in the form of mortgage-backed
securities, primarily Freddie Mac certificates.

     Freddie  Mac  certificates  represent  a pro  rata  interest  in a group of
mortgage loans (a Freddie Mac certificate  group)  purchased by Freddie Mac. The
mortgage loans underlying Freddie Mac certificates

Statement of Additional Information                                         5


consist  of fixed- or  adjustable-rate  mortgage  loans with  original  terms to
maturity of between ten and thirty years, substantially all of which are secured
by  first-liens  on one- to  four-family  residential  properties or multifamily
projects.  Each mortgage loan must meet  standards set forth in the FHLMC Act. A
Freddie Mac certificate group may include whole loans,  participation  interests
in whole loans, undivided interests in whole loans, and participations composing
another Freddie Mac certificate group.

     Freddie  Mac  guarantees  to  each  registered  holder  of  a  Freddie  Mac
certificate  the timely  payment of  interest  at the rate  provided  for by the
certificate. Freddie Mac also guarantees ultimate collection of all principal on
the related mortgage loans, without any offset or deduction,  but generally does
not guarantee the timely repayment of principal. Freddie Mac may remit principal
at any time after default on an underlying  mortgage  loan, but no later than 30
days  following  (a)  foreclosure  sale,  (b) payment of a claim by any mortgage
insurer,  or (c) the  expiration of any right of  redemption,  whichever  occurs
later,  and in any event no later than one year after  demand has been made upon
the mortgager for accelerated  payment of principal.  Obligations  guaranteed by
Freddie Mac are not backed by the full faith and credit of the U.S. government.

     COLLATERALIZED  MORTGAGE  OBLIGATIONS  (CMOS).  A CMO is a multiclass  bond
backed by a pool of mortgage pass-through  certificates or mortgage loans. CMO's
may be collateralized by (a) Ginnie Mae, Fannie Mae, or Freddie Mac pass-through
certificates,  (b)  unsecuritized  mortgage loans insured by the Federal Housing
Administration  or  guaranteed  by the  Department  of  Veterans'  Affairs,  (c)
unsecuritized conventional mortgages, or (d) any combination thereof.

     In structuring a CMO, an issuer  distributes  cash flow from the underlying
collateral over a series of classes called  "tranches." Each CMO is a set of two
or more  tranches,  with average lives and cash flow  patterns  designed to meet
specific investment  objectives.  The average life expectancies of the different
tranches in a four-part deal, for example, might be two, five, seven, and twenty
years.

     As payments on the underlying mortgage loans are collected,  the CMO issuer
pays the coupon rate of  interest to the  bondholders  in each  tranche.  At the
outset,  scheduled  and  unscheduled  principal  payments go to investors in the
first  tranches.  Investors in later tranches do not begin  receiving  principal
payments  until the prior tranches are paid off. This basic type of CMO is known
as a "sequential pay" or "plain vanilla" CMO.

     Some  CMOs are  structured  so that the  prepayment  or  market  risks  are
transferred  from one tranche to another.  Prepayment  stability  is improved in
some tranches if other tranches absorb more prepayment variability.

     The final tranche of a CMO often takes the form of a Z-bond,  also known as
an "accrual bond" or "accretion  bond." Holders of these  securities  receive no
cash until the  earlier  tranches  are paid in full.  During the period that the
other  tranches are  outstanding,  periodic  interest  payments are added to the
initial face amount of the Z-bond but are not paid to investors.  When the prior
tranches  are  retired,  the  Z-bond  receives  coupon  payments  on its  higher
principal  balance plus any principal  prepayments from the underlying  mortgage
loans.  The existence of a Z-bond tranche helps  stabilize cash flow patterns in
the other tranches. In a changing interest rate environment,  however, the value
of the Z-bond tends to be more volatile.

     As CMOs have evolved, some classes of CMO bonds have become more prevalent.
The planned amortization class (PAC) and targeted  amortization class (TAC), for
example,  were designed to reduce prepayment risk by establishing a sinking-fund
structure.  PAC and TAC bonds  assure to varying  degrees  that  investors  will
receive payments over a predetermined period under various prepayment scenarios.
Although  PAC and TAC bonds are  similar,  PAC bonds are better  able to provide
stable cash flows under various  prepayment  scenarios than TAC bonds because of
the order in which these tranches are paid.

     The  existence of a PAC or TAC tranche can create higher levels of risk for
other  tranches in the CMO because  the  stability  of the PAC or TAC tranche is
achieved  by  creating at least one other  tranche-known  as a  companion  bond,
support,  or non-PAC bond--that absorbs the variability of principal cash flows.
Because  companion  bonds have a high degree of average life  variability,  they
generally pay a higher

6                                                American Century Investments


yield.  A TAC bond can have some of the  prepayment  variability  of a companion
bond if there is also a PAC bond in the CMO issue.

     Floating-rate CMO tranches  (floaters) pay a variable rate of interest that
is usually  tied to the London  Interbank  Offered Rate  (LIBOR).  Institutional
investors with  short-term  liabilities,  such as commercial  banks,  often find
floating-rate  CMOs  attractive  investments.  "Super  floaters"  (which float a
certain percentage above LIBOR) and "inverse floaters" (which float inversely to
LIBOR) are variations on the floater  structure  that have highly  variable cash
flows.

     STRIPPED  MORTGAGE-BACKED  SECURITIES  (ARM FUND ONLY).  Stripped  mortgage
securities are created by segregating  the cash flows from  underlying  mortgage
loans or mortgage  securities to create two or more new securities,  each with a
specified  percentage  of  the  underlying   security's  principal  or  interest
payments.  Mortgage  securities may be partially  stripped so that each investor
class receives some interest and some principal.  When securities are completely
stripped,  however, all of the interest is distributed to holders of one type of
security, known as an interest-only security, or IO, and all of the principal is
distributed  to holders of another  type of security  known as a  principal-only
security,  or PO.  Strips  can be  created  in a  pass-through  structure  or as
tranches of a CMO.

     The market  values of IOs and POs are very  sensitive to interest  rate and
prepayment rate fluctuations.  POs, for example, increase (or decrease) in value
as interest rates decline (or rise). The price behavior of these securities also
depends  on  whether  the  mortgage  collateral  was  purchased  at a premium or
discount to its par value. Prepayments on discount coupon POs generally are much
lower than  prepayments on premium coupon POs. IOs may be used to hedge a Fund's
other investments  because prepayments cause the value of an IO strip to move in
the opposite direction from other mortgage-backed securities.

     ADJUSTABLE-RATE  MORTGAGE  LOANS  (ARMS).  ARMs eligible for inclusion in a
mortgage pool will generally  provide for a fixed initial mortgage interest rate
for a  specified  period of time,  generally  for either the first  three,  six,
twelve, thirteen,  thirty-six, or sixty scheduled monthly payments.  Thereafter,
the  interest  rates are subject to periodic  adjustment  based on changes in an
index.

     ARMs have minimum and maximum rates beyond which the mortgage interest rate
may not vary over the lifetime of the loan.  Certain ARMs provide for additional
limitations on the maximum amount by which the mortgage interest rate may adjust
for any  single  adjustment  period.  Negatively  amortizing  ARMs  may  provide
limitations on changes in the required monthly  payment.  Limitations on monthly
payments can result in monthly payments that are greater or less than the amount
necessary  to  amortize  a  negatively  amortizing  ARM by its  maturity  at the
interest rate in effect during any particular month.

     There  are two  types  of  indexes  that  provide  the  basis  for ARM rate
adjustments:  those  based on  market  rates  and  those  based on a  calculated
measure,  such as a cost of funds index or a moving  average of mortgage  rates.
Commonly  utilized  indexes  include the  one-year,  three-year,  and  five-year
constant  maturity  U.S.  Treasury  rates (as  reported by the  Federal  Reserve
Board);  the  three-month  Treasury bill rate;  the 180-day  Treasury bill rate;
rates on longer-term  Treasury  securities;  the Eleventh  District Federal Home
Loan Bank Cost of Funds Index (EDCOFI); the National Median Cost of Funds Index;
the one-month, three-month, six-month, or one-year London Interbank Offered Rate
(LIBOR);  or six-month CD rates.  Some  indexes,  such as the one-year  constant
maturity Treasury rate or three-month  LIBOR, are highly correlated with changes
in market interest rates. Other indexes,  such as the EDCOFI, tend to lag behind
changes in market  rates and be somewhat  less  volatile  over short  periods of
time.

     The EDCOFI reflects the monthly  weighted  average cost of funds of savings
and loan  associations  and  savings  banks  whose home  offices  are located in
Arizona,  California,  and Nevada (the Federal Home Loan Bank Eleventh District)
and who are member  institutions  of the Federal Home Loan Bank of San Francisco
(the FHLB of San Francisco), as computed from statistics tabulated and published
by the FHLB of San Francisco.  The FHLB of San Francisco  normally announces the
Cost of Funds Index on the last working day of the month  following the month in
which the cost of funds was incurred.

Statement of Addiitional Information                                        7


     One-year  and  three-year   Constant  Maturity  Treasury  (CMT)  rates  are
calculated by the Federal  Reserve Bank of New York,  based on daily closing bid
yields  on  actively  traded  Treasury  securities  submitted  by  five  leading
broker-dealers. The median bid yields are used to construct a daily yield curve.

     The  National  Median  Cost of  Funds  Index,  similar  to the  EDCOFI,  is
calculated  monthly by the Federal Home Loan Bank Board  (FHLBB) and  represents
the average monthly interest expenses on liabilities of member  institutions.  A
median,  rather than an arithmetic mean, is used to reduce the effect of extreme
numbers.

     The London Interbank  Offered Rate Index (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 Manager may invest in ARMs whose periodic interest rate adjustments are
based on new indexes as these indexes become available.

ZERO-COUPON SECURITIES (SHORT-TERM TREASURY,
INTERMEDIATE-TERM TREASURY, LONG-TERM
TREASURY AND INFLATION-ADJUSTED TREASURY)

     Zero-coupon U.S. Treasury securities are the unmatured interest coupons and
underlying  principal  portions of U.S.  Treasury  notes and bonds.  Originally,
these  securities were created by  broker-dealers  who bought Treasury notes and
bonds and deposited these  securities with a custodian bank. The  broker-dealers
then sold receipts representing  ownership interests in the coupons or principal
portions of the notes and bonds.  Some examples of zero-coupon  securities  sold
through custodial receipt programs are CATS (Certificates of Accrual on Treasury
Securities),  TIGRs  (Treasury  Investment  Growth  Receipts),  and  generic TRs
(Treasury Receipts).

     The U.S. Treasury subsequently introduced a program called Separate Trading
of Registered  Interest and Principal of Securities  (STRIPS).  In this program,
eligible  securities  may be presented to the U.S.  Treasury and  exchanged  for
their component  parts,  which are then traded in book-entry  form.  (Book-entry
trading eliminated the bank credit risks associated with broker-dealer sponsored
custodial  receipt   programs.)  STRIPS  are  direct  obligations  of  the  U.S.
government and have the same credit risks as other U.S. Treasury securities.

     Principal  and  interest  on  bonds  issued  by  the   Resolution   Funding
Corporation   (REFCORP)   have  also  been  separated  and  issued  as  stripped
securities.  The U.S.  government  and its  agencies  may  issue  securities  in
zero-coupon   form.   These  securities  are  referred  to  as  "original  issue
zero-coupon securities."

INVESTMENT RESTRICTIONS

     The Funds' investment  restrictions set forth below are fundamental and may
not be changed  without  approval of a majority of the votes of  shareholders of
the Fund, as determined in accordance with the Investment Company Act of 1940.

     GOVERNMENT AGENCY MAY NOT:

(1)  Borrow money in excess of 331/3% of the market  value of its total  assets.
     The  Fund  may  borrow  from a  bank  as a  temporary  measure  to  satisfy
     redemption  requests or for extraordinary or emergency  purposes,  provided
     that immediately  after any such borrowing there is an asset coverage of at
     least 300 per centum for all such borrowings. To secure any such borrowing,
     the Fund may pledge or hypothecate  not in excess of 331/3% of the value of
     its total assets.  The Fund will not purchase any security while borrowings
     representing more than 5% of its total assets are outstanding. The Fund may
     also borrow money for  temporary or emergency  purposes from other funds or
     portfolios  for  which  Benham  Management  Corporation  is the  investment
     advisor, or from a joint account of such funds or portfolios,  as permitted
     by federal regulatory agencies.

(2)  Act as an underwriter of securities issued by others.

(3)  Purchase, sell, or invest in real estate, commodities, commodity contracts,
     foreign exchange, or interests in oil, gas, or other mineral exploration or
     development programs,  provided that this limitation shall not prohibit the
     purchase of U.S. government securities and other debt securities secured by
     real estate or interests therein.

(4)  Engage in any short-selling operations.

(5)  Make  loans to  others,  except for the  lending  of  portfolio  securities
     pursuant to guidelines

8                                                 American Century Investments


     established by the Board of Trustees or for the purchase of debt securities
     in accordance with the Fund's investment objective and policies.

(6)  Purchase any equity  securities  in any  companies,  including  warrants or
     bonds with warrants attached,  or any preferred stocks,  convertible bonds,
     or convertible debentures.

(7)  Engage in margin  transactions  or in transactions  involving puts,  calls,
     straddles, or spreads.

(8)  Invest in securities which are not readily marketable or the disposition of
     which is restricted under federal securities laws (collectively,  "illiquid
     securities") if, as a result,  more than 10% of the Fund's net assets would
     be invested in illiquid securities.

(9)  Issue or sell any class of senior  security  as defined  in the  Investment
     Company Act of 1940 except to the extent  that notes  evidencing  temporary
     borrowings   or  the   purchase  of   securities   on  a   when-issued   or
     delayed-delivery basis might be deemed such.

(10) Purchase or retain  securities  of any issuer if, to the  knowledge  of the
     Trust's  management,  those  officers  and Trustees of the Trust and of its
     investment  advisor,  who  each  own  beneficially  more  than  0.5% of the
     outstanding securities of such issuer,  together own beneficially more than
     5% of such securities.

SHORT-TERM TREASURY MAY NOT:

(1)  With respect to 75% of its total  assets,  purchase the  securities  of any
     issuer (other than securities  issued or guaranteed by the U.S.  government
     or any of its agencies or instrumentalities) if, as a result, (a) more than
     5% of the Fund's total assets would be invested in the  securities  of that
     issuer, or (b) the Fund would hold more than 10% of the outstanding  voting
     securities of that issuer.

(2)  Issue senior  securities,  except as permitted under the Investment Company
     Act of 1940 and  except  to the  extent  that  notes  evidencing  temporary
     borrowings   or  the   purchase  of   securities   on  a   when-issued   or
     delayed-delivery basis might be deemed such.

(3)  Borrow  money,  except for temporary or emergency  purposes,  and then only
     from a bank.  Such  borrowings  may not exceed  331/3% of the Fund's  total
     assets.

(4)  Underwrite  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 disposing of restricted securities.

(5)  Purchase the  securities  of any issuer  (other than  securities  issued or
     guaranteed   by  the   U.S.   government   or  any  of  its   agencies   or
     instrumentalities)  if, as a  result,  more  than 25% of the  Fund's  total
     assets would be invested in the  securities  of companies  whose  principal
     business activities are in the same industry.

(6)  Purchase or sell real estate  unless  acquired  as result of  ownership  of
     securities or other  instruments,  provided that this  limitation  will not
     prohibit the Fund from purchasing  U.S.  government  securities  secured by
     real estate or interests therein.

(7)  Purchase  or sell  physical  commodities  unless  acquired  as a result  of
     ownership of securities or other instruments, provided that this limitation
     will not prohibit the Fund from  purchasing and selling options and futures
     contracts or from  investing in securities or other  instruments  backed by
     physical commodities.

(8)  Make loans, other than loans of portfolio securities pursuant to guidelines
     established by the Board of Trustees,  provided that this  restriction will
     not prohibit the Fund from  purchasing  debt  securities in accordance with
     its investment  objectives and policies.  Loans, in the aggregate,  will be
     limited to 331/3% of the Fund's total assets.

INTERMEDIATE-TERM TREASURY MAY NOT:

(1)  Purchase the  securities of any issuer other than the U.S.  Treasury.  This
     restriction  shall not apply to  repurchase  agreements  consisting of U.S.
     government  securities  or to  purchases  by the  Fund of  shares  of other
     investment  companies,  provided  that not more than 3% of such  investment
     company's outstanding shares would be held by the Fund, not more than 5% of
     the value of the Fund's assets would be invested in

Statement of Additional Information                                          9


     shares of such  company,  and not more than 10% of the value of the  Fund's
     assets  would  be  invested  in  shares  of  investment  companies  in  the
     aggregate.

(2)  Engage in any short-selling operations.

(3)  Engage in margin  transactions  or in transactions  involving puts,  calls,
     straddles, or spreads.

(4)  Purchase or sell real estate,  commodities,  or commodity contracts, or buy
     and sell foreign exchange.

(5)  Purchase  securities for which the Fund might be liable for further payment
     or liability.

(6)  Invest in portfolio securities that the Fund may not be free to sell to the
     public without  registration under the Securities Act of 1933 or the taking
     of similar  actions  under other  securities  laws  relating to the sale of
     securities.

(7)  Issue or sell any class of senior security, except to the extent that notes
     evidencing temporary borrowing might be deemed such.

(8)  Lend money other than through the purchase of debt securities in accordance
     with its investment  policy (this  restriction does not apply to repurchase
     agreements).

(9)  Borrow  money  except  from  a  bank  as a  temporary  measure  to  satisfy
     redemption  requests,  or for extraordinary or emergency  purposes and then
     only in an amount not  exceeding  331/3% of the market  value of the Fund's
     total assets,  so that  immediately  after any such  borrowing  there is an
     asset  coverage  of at least 300 per  centum  for all such  borrowings.  To
     secure any such borrowing, the Fund may not pledge or hypothecate in excess
     of 331/3% of the value of its total assets.  The Fund will not purchase any
     security while borrowings representing more than 5% of its total assets are
     outstanding.

LONG-TERM TREASURY MAY NOT:

(1)  With respect to 75% of its total  assets,  purchase the  securities  of any
     issuer (other than securities  issued or guaranteed by the U.S.  government
     or any of its agencies or instrumentalities)  if, as a result (a) more than
     5% of the Fund's total assets would be invested in the  securities  of that
     issuer, or (b) the Fund would hold more than 10% of the outstanding  voting
     securities of that issuer.

(2)  Issue senior  securities,  except as permitted under the Investment Company
     Act of 1940 and  except  to the  extent  that  notes  evidencing  temporary
     borrowings   or  the   purchase  of   securities   on  a   when-issued   or
     delayed-delivery basis might be deemed such.

(3   Borrow  money,  except for temporary or emergency  purposes,  and then only
     from a bank.  Such  borrowings  may not exceed  331/3% of the Fund's  total
     assets.

(4)  Underwrite  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 disposing of restricted securities.

(5)  Purchase the  securities  of any issuer  (other than  securities  issued or
     guaranteed   by  the   U.S.   government   or  any  of  its   agencies   or
     instrumentalities)  if, as a  result,  more  than 25% of the  Fund's  total
     assets would be invested in the  securities  of companies  whose  principal
     business activities are in the same industry.

(6)  Purchase or sell real estate  unless  acquired as a result of  ownership of
     securities or other  instruments,  provided that this  limitation  will not
     prohibit the Fund from purchasing  U.S.  government  securities  secured by
     real estate or interests therein.

(7)  Purchase  or sell  physical  commodities  unless  acquired  as a result  of
     ownership of securities or other instruments, provided that this limitation
     will not prohibit the Fund from  purchasing and selling options and futures
     contracts or from  investing in securities or other  instruments  backed by
     physical commodities.

(8)  Make loans, other than loans of portfolio securities pursuant to guidelines
     established by the Board of Trustees,  provided that this  restriction will
     not prohibit the Fund from  purchasing  debt  securities in accordance with
     its investment  objectives and policies.  Loans, in the aggregate,  will be
     limited to 331/3% of the Fund's total assets.

ARM FUND MAY NOT:

(1)  Borrow money in excess of 331/3% of the market  value of its total  assets,
     and then only from a bank and as a temporary measure to satisfy  redemption
     requests or for  extraordinary  or emergency  purposes,  and provided  that
     imme-

10                                                American Century Investments


     diately after any such borrowing there is an asset coverage of at least 300
     per centum for all such borrowings.  To secure any such borrowing, the Fund
     may pledge or hypothecate not in excess of 331/3% of the value of its total
     assets.   The  Fund  will  not  purchase  any  security  while   borrowings
     representing more than 5% of its total assets are outstanding.

(2)  Act as an underwriter of securities issued by others.

(3)  Purchase, sell, or invest in real estate, commodities, commodity contracts,
     foreign exchange, or interests in oil, gas, or other mineral exploration or
     development programs,  provided that this limitation shall not prohibit the
     purchase of U.S. government securities and other debt securities secured by
     real estate or interests therein.

(4)  Engage in any short-selling operations.

(5)  Make  loans to  others,  except for the  lending  of  portfolio  securities
     pursuant  to  guidelines  established  by the Board of  Trustees or for the
     purchase  of debt  securities  in  accordance  with the  Fund's  investment
     objective and policies.

(6)  Purchase any equity  securities  in any  companies,  including  warrants or
     bonds with warrants attached,  or any preferred stocks,  convertible bonds,
     or convertible debentures.

(7)  Engage in margin  transactions  or in transactions  involving puts,  calls,
     straddles, or spreads.

(8)  Invest in securities that are not readily  marketable or the disposition of
     which is restricted under federal securities laws (collectively,  "illiquid
     securities")  if, as a result,  more than 10% ofthe Fund's net assets would
     be invested in illiquid securities.

(9)  Issue or sell any class of senior  security  as defined  in the  Investment
     Company Act of 1940 except to the extent  that notes  evidencing  temporary
     borrowings   or  the   purchase  of   securities   on  a   when-issued   or
     delayed-delivery basis might be deemed such.

(10) Acquire or retain the securities of any other  investment  company if, as a
     result, more than 3% of such investment company's  outstanding shares would
     be held by the Fund,  more than 5% of the value of the Fund's  assets would
     be invested in shares of such investment  company,  or more than 10% of the
     value of the  Fund's  assets  would be  invested  in shares  of  investment
     companies  in the  aggregate,  or  except  in  connection  with  a  merger,
     consolidation, acquisition, or reorganization.

(11) Purchase or retain  securities  of any issuer if, to the  knowledge  of the
     Trust's  management,  those  officers  and Trustees of the Trust and of its
     investment  advisor  who  each  own  beneficially  more  than  0.5%  of the
     outstanding  securities of such issuer together own beneficially  more than
     5% of such securities.

GNMA FUND MAY NOT:

(1)  Borrow money in excess of 331/3% of the market  value of its total  assets,
     and then only from a bank and as a temporary measure to satisfy  redemption
     requests or for  extraordinary  or emergency  purposes,  and provided  that
     immediately after any such borrowing there is an asset coverage of at least
     300 per centum for all such borrowings.  To secure any such borrowing,  the
     Fund may pledge or hypothecate  not in excess of 331/3% of the value of its
     total  assets.  The Fund will not purchase any  security  while  borrowings
     representing more than 5% of its total assets are outstanding.

(2)  Act as an underwriter of securities issued by others.

(3)  Purchase, sell, or invest in real estate, commodities, commodity contracts,
     foreign exchange, or interests in oil, gas, or other mineral exploration or
     development programs,  provided that this limitation shall not prohibit the
     purchase of U.S. government securities and other debt securities secured by
     real estate or interests therein.

(4)  Engage in any short-selling operations.

(5)  Make  loans to  others,  except for the  lending  of  portfolio  securities
     pursuant  to  guidelines  established  by the Board of  Trustees or for the
     purchase  of debt  securities  in  accordance  with the  Fund's  investment
     objective and policies.

(6)  Purchase any equity  securities  in any  companies,  including  warrants or
     bonds with warrants attached,  or any preferred stocks,  convertible bonds,
     or convertible debentures.

(7)  Engage in margin  transactions  or in transactions  involving puts,  calls,
     straddles, or spreads.

Statement of Additional Information                                         11


(8)  Invest in securities that are not readily  marketable or the disposition of
     which is restricted under federal securities laws (collectively,  "illiquid
     securities") if, as a result,  more than 10% of the Fund's net assets would
     be invested in illiquid securities.

(9)  Issue or sell any class of senior  security  as defined  in the  Investment
     Company Act of 1940 except to the extent  that notes  evidencing  temporary
     borrowings   or  the   purchase  of   securities   on  a   when-issued   or
     delayed-delivery basis might be deemed such.

(10) Acquire or retain the securities of any other investment  company except in
     connection with a merger, consolidation, acquisition, or reorganization.

(11) Purchase or retain  securities  of any issuer if, to the  knowledge  of the
     Trust's  management,  those  officers  and Trustees of the Trust and of its
     investment  advisor  who  each  own  beneficially  more  than  0.5%  of the
     outstanding  securities of such issuer together own beneficially  more than
     5% of such securities.

INFLATION-ADJUSTED TREASURY MAY NOT:

(1)  With respect to 75% of its total  assets,  purchase the  securities  of any
     issuer (other than securities  issued or guaranteed by the U.S.  government
     or its agencies or instrumentalities)  if, as a result, more than 5% of its
     total assets would be invested in  securities  of that issuer,  or it would
     hold more than 10% of the outstanding voting securities of that issuer.

(2)  Issue senior securities, except as permitted under the 1940 Act.

(3)  Borrow  money,  except  that the Fund may  borrow  money for  temporary  or
     emergency  purposes  (not for  leveraging or  investment)  in an amount not
     exceeding 331/3% of the Fund's total assets (including the amount borrowed)
     less  liabilities  (other than  borrowings).  Any  borrowings  that come to
     exceed this amount will be reduced within three days (not including Sundays
     and  holidays)  to  the  extent  necessary  to  comply  with  the  331/3  %
     limitation.

(4)  Lend any security or make any other loan if, as a result,  more than 331/3%
     of the Fund's  total  assets would be lent to other  parties,  except,  (a)
     through  the  purchase  of a  portion  of an  issue of debt  securities  in
     accordance with its investment objective,  policies and limitations, or (b)
     by engaging in repurchase agreements with respect to portfolio securities.

(5)  Purchase or sell real estate  unless  acquired as a result of  ownership of
     securities or other  instruments  (but this shall not prevent the Fund from
     investment  in  securities  or other  instruments  backed by real estate or
     securities of companies engaged in the real estate business).

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

(7)  Purchase the  securities  of any issuer  (other than  securities  issued or
     guaranteed   by  the   U.S.   government   or  any  of  its   agencies   or
     instrumentalities)  if, as a  result,  more  than 25% of the  Fund's  total
     assets would be invested in the  securities  of companies  whose  principal
     business activities are in the same industry.

     Some of the Funds are also subject to the following  restrictions  that are
not  fundamental  and may therefore be changed by the Board of Trustees  without
shareholder approval.

GOVERNMENT AGENCY MAY NOT:

(a)  Invest in oil, gas, or other mineral leases.

SHORT-TERM TREASURY MAY NOT:

(a)  Engage in any  short-selling  operations,  provided  that  transactions  in
     futures and options will not constitute selling securities short.

(b)  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 will not constitute  purchasing  securities on
     margin.

(c)  Purchase any security  while  borrowings  representing  more than 5% of its
     total assets are outstanding.

(d)  Purchase restricted securities.

(e)  Invest in securities that are not readily  marketable or the disposition of
     which is restricted under federal securities laws (collectively,  "illiquid
     securities") if, as a result,  more than 10% of the Fund's net assets would
     be invested in illiquid securities.

12                                                American Century Investments


(f)  Purchase or sell futures  contracts or put or call  options,  provided that
     this  restriction  will not apply to options  attached  to, or  acquired or
     traded together with,  their  underlying  securities;  nor will it apply to
     securities  that  incorporate   features  similar  to  options  or  futures
     contracts.

(g)  Purchase the securities of other  investment  companies  except in the open
     market where no commission except the ordinary broker's  commission is paid
     or  purchase  securities  issued by other  open-end  investment  companies,
     provided that this  restriction  will not apply to  securities  received as
     dividends,  through offers of exchange, or as a result of a reorganization,
     consolidation, or merger.

(h)  Purchase any equity  securities,  including warrants or bonds with warrants
     attached,  or any  preferred  stocks,  convertible  bonds,  or  convertible
     debentures.

(i)  Invest in oil, gas, or other mineral exploration or development programs or
     leases.

(j)  Purchase  securities  of any  issuer  if, to the  knowledge  of the  Fund's
     investment  advisor,  those  Trustees  and  officers of the Trust and those
     Trustees and officers of the investment  advisor who  individually own more
     than  0.5% of the  outstanding  securities  of such  issuer,  together  own
     beneficially more than 5% of such issuer's securities.

(k)  Invest  more  than 15% of the  Fund's  total  assets in the  securities  of
     issuers  which  together with any  predecessors  have a record of less than
     three  years  continuous  operation  and  securities  of issuers  which are
     restricted as to disposition (including 144A securities).

LONG-TERM TREASURY MAY NOT:

(a)  Engage in any  short-selling  operations,  provided  that  transactions  in
     futures and options will not constitute selling securities short.

(b)  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 will not constitute  purchasing  securities on
     margin.

(c)  Purchase any security  while  borrowings  representing  more than 5% of its
     total assets are outstanding.

(d)  Invest in securities that are not readily  marketable or the disposition of
     which is restricted under federal securities laws (collectively,  "illiquid
     securities") if, as a result,  more than 10% of the Fund's net assets would
     be invested in illiquid securities.

(e)  Purchase or sell futures  contracts or put or call  options,  provided that
     this  restriction  will not apply to options  attached  to, or  acquired or
     traded together with,  their  underlying  securities;  nor will it apply to
     securities  that  incorporate   features  similar  to  options  or  futures
     contracts.

(f)  Purchase the securities of other  investment  companies  except in the open
     market where no commission except the ordinary broker's  commission is paid
     or  purchase  securities  issued by other  open-end  investment  companies,
     provided that this  restriction  will not apply to  securities  received as
     dividends,  through offers of exchange, or as a result of a reorganization,
     consolidation, or merger.

(g)  Purchase any equity  securities,  including warrants or bonds with warrants
     attached,  or any  preferred  stocks,  convertible  bonds,  or  convertible
     debentures.

(h)  Invest in oil, gas, or other mineral exploration or development programs or
     leases.

(i)  Purchase  securities  of any  issuer  if, to the  knowledge  of the  Fund's
     investment  advisor,  those  Trustees and officers of the Trust,  and those
     Trustees and officers of the investment  advisor who  individually own more
     than  0.5% of the  outstanding  securities  of such  issuer,  together  own
     beneficially more than 5% of such issuer's securities.

(j)  Invest  more  than 15% of the  Fund's  total  assets in the  securities  of
     issuers  which  together with any  predecessors  have a record of less than
     three year's  continuous  operation  and  securities  of issuers  which are
     restricted as to disposition (including 144A securities).

(k)  Purchase restricted securities.

ARM FUND MAY NOT:

(a)  Invest in oil, gas, or other mineral leases.

INFLATION-ADJUSTED TREASURY MAY NOT:

(a)  Lend assets other than  securities to other parties,  except by (a) lending
     money (up to 5% of the Fund's net assets) to a registered investment

Statement of Additional Information                                         13


      company or  portfolio  for which its  investment  advisor or an  affiliate
      serves as investment  advisor or (b) acquiring loans, loan  participation,
      or other forms of direct debt  instruments  and in  connection  therewith,
      assuming  any  associated  unfunded  commitments  of  the  sellers.  (This
      limitation does not apply to purchases of debt securities or to repurchase
      agreements.)


(b)  Sell  securities  short,  unless  its  owns  or has  the  right  to  obtain
     securities  equivalent in kind and amount to the securities sold short, and
     provided that  transaction in futures  contracts and options are not deemed
     to constitute selling securities short.


(c)  Purchase any security  while  borrowings  representing  more than 5% of its
     total assets are outstanding.

     Unless otherwise indicated, with the exception of the percentage limitation
on borrowing,  percentage  limitations included in the restrictions apply at the
time transactions are entered into. Accordingly,  any later increase or decrease
beyond the specified limitation resulting from a change in the Fund's net assets
will  not be  considered  in  determining  whether  it  has  complied  with  its
investment restrictions.

PORTFOLIO TRANSACTIONS

     Each Fund's assets are invested by the Manager in a manner  consistent with
the Fund's  investment  objectives,  policies,  and  restrictions,  and with any
instructions  from the Board of  Trustees  that may be issued 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 Funds.

     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 Funds solely on the basis of best price and execution.

     U.S. government securities 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.

     On behalf of the Funds,  the Manager  transacts in round lots  ($100,000 to
$10 million or more) whenever  possible.  Since  commissions are not charged for
round-lot transactions of U.S. Treasury securities, the Funds' transaction costs
consist solely of custodian charges and dealer mark-ups.  Each Fund may hold its
portfolio securities to maturity or sell or swap them for others, depending upon
the level and slope of, and anticipated  changes in, the yield curve.  The Funds
paid no brokerage commissions during the fiscal year ended March 31, 1996.

     The portfolio turnover rates for each of the Variable-Price Funds appear in
the Financial Highlights appearing in the Prospectus.

VALUATION OF PORTFOLIO SECURITIES

     Each 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 3:00
p.m.  Central time each day the Exchange is open for business.  The Exchange has
designated the following  holiday  closings for 1997: New Year's Day (observed),
Presidents`  Day,  Good  Friday,  Memorial  Day,  Independence  Day,  Labor Day,
Thanksgiving,  and  Christmas  (observed).  Although  the Funds  expect the same
holiday  schedule  to be observed in the  future,  the  Exchange  may modify its
holiday schedule at any time.

     Each Fund's share price is  calculated by adding the value of all portfolio
securities and other assets,  deducting liabilities,  and dividing the result by
the number of shares outstanding.  Expenses and interest on portfolio securities
are accrued daily.

     Securities  held by Government  Agency are valued on the basis of 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 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

14                                                American Century Investments


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 amortized  cost valuation  method is permitted in accordance  with Rule
2a-7  under the 1940 Act.  Under the  Rule,  a fund such as  Government  Agency,
holding  itself out as a money market fund,  must adhere to certain  quality and
maturity criteria which are described in the Prospectus.

     The Board of Trustees has established  procedures designed to stabilize the
Government  Agency's NAV at $1.00 per share to the extent  reasonably  possible.
These  procedures  require  the  Fund's  Chief  Financial  Officer to notify the
Trustees  immediately  if, at any time,  the Fund's  weighted  average  maturity
exceeds 60 days, or its NAV, as determined by using available market quotations,
deviates  from its amortized  cost per share by .25% or more. If such  deviation
exceeds .40%, a meeting of the Board of Trustees' audit committee will be called
to consider what action,  if any,  should be taken.  If such  deviation  exceeds
 .50%, the Fund's Chief Financial  Officer is instructed to adjust daily dividend
distributions  immediately  to the extent  necessary to reduce the  deviation to
 .50% or lower and to call a meeting of the Board of Trustees to consider further
action.

     Actions  the Board of  Trustees  may  consider  under  these  circumstances
include (a) selling  portfolio  securities  prior to maturity,  (b)  withholding
dividends or  distributions  from capital,  (c) authorizing a one-time  dividend
adjustment,  (d) discounting share purchases and initiating redemptions in kind,
or (e) valuing portfolio securities at market for purposes of calculating NAV.

     Most  securities  held by the  Variable-Price  Funds are  valued at current
market value as provided by an independent pricing service. Other securities are
priced  at fair  value  as  determined  in good  faith  pursuant  to  guidelines
established by the Funds' Board of Trustees.

PERFORMANCE

     A Fund may  quote  performance  in  various  ways.  Historical  performance
information  will  be  used  in  advertising  and  sales  literature  and is not
indicative of future results.  A Fund's share price,  yield and return will vary
with changing market conditions.

     For  GOVERNMENT  AGENCY,  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 March 31, 1996,  Government  Agency's yield
was 4.73% and its effective yield was 4.84%.

     For the VARIABLE-PRICE  FUNDS, yield quotations are based on the investment
income per share earned during a particular 30-day period, less expenses accrued
during the period (net  investment  income),  and are  computed by dividing  the
Fund's net  investment  income by its share price on the last day of the period,
according to the following formula:

     YIELD = 2 [(a - b + 1)6 - 1]
                 -----
                  cd

where a = dividends and interest earned during the period,  b = expenses accrued
for the period (net of  reimbursements),  c = the average daily number of shares
outstanding during the period that were entitled to receive  dividends,  and d =
the maximum offering price per share on the last day of the period.

     Each  Variable-Price  Fund's  yield for the 30-day  period  ended March 31,
1996, is indicated in the following table.

Fund                              30-day Yield
- --------------------------------------------------------------------------------
Short-Term Treasury                  5.02%
Intermediate-Term Treasury           5.43
Long-Term Treasury                   6.18
ARM Fund                             5.43
GNMA Fund                            6.86
- --------------------------------------------------------------------------------

Statement of Additional Information                                         15


     Total  returns  quoted in  advertising  and sales  literature  reflect  all
aspects of a Fund's return,  including the effect of  reinvesting  dividends and
capital gain distributions 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 a Fund over 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 return of 100% over 10
years would produce an average annual total return of 7.18%, which is the steady
annual rate that would result in 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 Funds' performance is
not constant over time,  but changes from year to year,  and that average annual
returns   represent   averaged   figures  as  opposed  to  actual   year-to-year
performance.

     The Funds' average annual  returns for the one-year,  five-year,  ten-year,
and  life-of-fund  periods ended March 31, 1996,  are indicated in the following
table.

                                 Average Annual Total Returns
- --------------------------------------------------------------------------------
                                                                       Life-of-
Fund                      One-Year      Five-Years       Ten-Years       Fund
- --------------------------------------------------------------------------------
Government Agency(1)        5.35%          4.17%             N/A        4.98%
Short-Term Treasury(2)       6.71            N/A             N/A         4.35
Intermediate-Term
   Treasury(3)               8.42           7.14           6.85%         8.98
Long-Term Treasury(2)       13.46            N/A             N/A         7.26
ARM Fund(4)                  6.42            N/A             N/A         4.62
GNMA Fund5(5)               10.08           7.93            8.50         9.00
- --------------------------------------------------------------------------------
1 Commenced operations on December 5, 1989.
2 Commenced operations on September 8, 1992.
3 Commenced operations on May 16, 1980.
4 Commenced operations on September 3, 1991.
5 Commenced operations on September 23, 1985.

     In addition to average annual total returns, each 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.  Total  returns may be broken down into their  components of income
and capital  (including  capital  gains and changes in share  price) in order to
illustrate the  relationship of these factors and their  contributions  to total
return.  Performance information may be quoted numerically or in a table, graph,
or similar illustration.

     The Funds' performance may be compared with the performance of other mutual
funds  tracked by mutual  fund rating  services or with other  indexes 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 indexes of stock market
performance;  and  indexes and  historical  data  supplied  by major  securities
brokerage or investment advisory firms. The Funds may also utilize reprints from
newspapers  and magazines  furnished by third  parties to illustrate  historical
performance.

     The Funds' 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.

16                                               American Century Investments


TAXES

FEDERAL INCOME TAX

     Each 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").  By so  qualifying,  each Fund will not incur  federal or state  income
taxes on its net  investment  income and on net  realized  capital  gains to the
extent distributed as dividends to shareholders.

     Amounts not  distributed  on a timely basis in  accordance  with a calendar
year  distribution  requirement are subject to a nondeductible  4% excise tax at
the Fund level.  To avoid the tax, a Fund must  distribute  during each calendar
year an amount equal to the sum of (a) at least 98% if its ordinary  income (not
taking into account any capital gains or losses) for the calendar  year,  (b) at
least 98% of its capital gains in excess of capital losses (adjusted for certain
ordinary  losses) for a one-year  period  generally  ending on October 31 of the
calendar year, and (c) all ordinary  income and capital gains for previous years
that were not distributed during such years.

     Under the Code, dividends derived from interest, and any short-term capital
gains, are federally  taxable to shareholders as ordinary income,  regardless of
whether such  dividends are taken in cash or  reinvested  in additional  shares.
Distributions  made  from a Fund's  net  realized  long-term  capital  gains and
designated as capital gain  dividends are taxable to  shareholders  as long-term
capital  gains,  regardless  of the length of time  shares  are held.  Corporate
investors are not eligible for the dividends-received  deduction with respect to
distributions from the Funds. A distribution will be treated as paid on December
31st of a calendar  year if it is  declared  by a Fund in  October,  November or
December  of the year  with a record  date in such a month  and paid by the Fund
during  January of the following  year.  Such  distributions  will be taxable to
shareholders in the calendar year the  distributions  are declared,  rather than
the calendar year in which the distributions are received.

     Upon redeeming,  selling, or exchanging shares of a Variable-Price  Fund, a
shareholder  will realize a taxable gain or loss depending upon his or her basis
in the  shares  liquidated.  The gain or loss  generally  will be  long-term  or
short-term depending on the length of time the shares were held. However, a loss
recognized by a shareholder  in the  disposition of shares on which capital gain
dividends were paid (or deemed paid) before the  shareholder had held his or her
shares for more than six months would be treated as a long-term capital loss for
tax purposes to the extent of capital gain dividends paid (or deemed paid).

     As of March 31, 1996,  capital loss carryovers were as follows:  $7,505,846
(Intermediate-Term  Treasury),  $857,191 (Long-Term Treasury),  $69,205,630 (ARM
Fund),  and $23,041,420  (GNMA Fund). All loss carryovers will expire during the
period March 31, 2000, through March 31, 2004. A Fund will not make capital gain
distributions to its shareholders  until all of its capital loss carryovers have
been offset or expired.

     The Funds may invest in obligations  issued at a discount.  In that case, a
portion of the discount element  generally is included in the Fund's  investment
company  taxable  income in each taxable period in which the obligation is held.
Such  amounts are subject to the Fund's  tax-related  distribution  requirements
even if not received by the Fund in cash in that period.

     Dividends paid by Government Agency, Short-Term Treasury, Intermediate-Term
Treasury,  Long-Term  Treasury and  Inflation-Adjusted  Treasury are exempt from
state personal income taxes in all states to the extent these Funds derive their
income from debt securities of the U.S. government,  whose interest payments are
state tax-exempt.

     The information  above is only a summary of some of the tax  considerations
generally affecting the Funds and their  shareholders.  No attempt has been made
to discuss  individual tax  consequences.  The Funds'  distributions may also be
subject to state,  local,  or foreign  taxes.  To determine  whether a Fund is a
suitable  investment based on his or her tax situation,  a prospective  investor
may wish to consult a tax advisor.

ABOUT THE TRUST

     American Century  Government Income Trust (the "Trust"),  formerly known as
Benham Government Income Trust, is a registered open-end  management  investment
company that was organized as a  Massachusetts  business trust on July 24, 1985.
Currently,   there  are  seven   series  of  the  Trust  as  follows:   American
Century--Benham Government

Statement of Additional Information                                         17


Agency Money Market Fund  (formerly  known as Benham  Government  Agency  Fund),
American  Century--Benham  Short-Term  Treasury Fund  (formerly  known as Benham
Short-Term Treasury and Agency Fund), American Century--Benham Intermediate-Term
Treasury  Fund  (formerly  known  as  Benham   Treasury  Note  Fund),   American
Century--Benham  Long-Term  Treasury Fund  (formerly  known as Benham  Long-Term
Treasury and Agency Fund), American  Century--Benham  Adjustable Rate Government
Securities Fund (formerly known as Benham Adjustable Rate Government  Securities
Fund), American  Century--Benham GNMA Fund (formerly known as Benham GNMA Income
Fund), and American Century--Benham  Inflation-Adjusted Treasury Fund. The Board
of Trustees may create additional series from time to time.

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

     Each series votes 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 elect a Board of Trustees.
The Trust has instituted  dollar-based voting,  meaning that the number of votes
you are  entitled  to is based upon the  dollar  value of your  investment.  The
election  of  Trustees  is  determined  by the  votes  received  from all  Trust
shareholders,  without regard to whether a majority of  shareholders  of any one
series voted in favor of a particular nominee or all nominees as a group. Shares
of each series have equal rights as to dividends and  distributions  declared by
the  series  and in the net  assets  of such  series  upon  its  liquidation  or
dissolution.

     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 because of shareholder
liability is limited to circumstances in which both inadequate  insurance exists
and the Trust is unable to meet its obligations.

     CUSTODIAN BANKS: 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 Funds'  assets.  Services  provided  by the
custodian  banks  include  (a)  settling  portfolio  purchases  and  sales,  (b)
reporting failed trades,  (c) identifying and collecting  portfolio income,  and
(d)  providing  safekeeping  of  securities.  The  custodians  take  no  part in
determining the Funds'  investment  policies or in determining  which securities
are sold or purchased by the Fund.

     INDEPENDENT  AUDITORS:  KPMG Peat  Marwick LLP,  1000  Walnut,  Suite 1600,
Kansas City,  Missouri  64106,  serves as the Trust's  independent  auditors and
provides services including the audit of annual financial statements.

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 of 1940) by virtue of, among other considerations, their affiliation
with  either  the Trust;  the  Trust's  investment  advisor,  Benham  Management
Corporation;  the  Trust's  agent  for  transfer  and  administrative  services,
American Century Services  Corporation  (ACS); the Trust's  distribution  agent,
American Century Investment  Services,  Inc. (ACIS);  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 Trustee or Director
of other funds advised by the Manager.

18                                                American Century Investments


Unless otherwise noted, a date in parentheses  indicates the date the Trustee or
officer  began his or her service in a particular  capacity.  The  Trustees' and
officers'  address  with the  exception  of Mr.  Stowers and Ms.  Roepke is 1665
Charleston Road, Mountain View, California 94043. The address of Mr. Stowers and
Ms. Roepke is 4500 Main Street, Kansas City, Missouri 64111.

TRUSTEES

     *JAMES M. BENHAM,  Chairman of the Board of Trustees (1985),  President and
Chief Executive Officer (1996). Mr. Benham is also President and Chairman of the
Board of the  Manager  (1971),  and a member  of the Board of  Governors  of the
Investment  Company  Institute  (1988).  Mr.  Benham has been in the  securities
business  since 1963, and he frequently  comments  through the media on economic
conditions, investment strategies, and the securities markets.

     ALBERT A.  EISENSTAT,  independent  Trustee  (1995).  Mr.  Eisenstat  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,  independent Trustee (1995);  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);
counsel to Marron, Reid & Sheehy (a San Francisco law firm, 1984).

     MYRON S. SCHOLES, independent Trustee (1985). Mr. Scholes is a principal of
Long-Term  Capital  Management  (1993).  He is also 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, independent Trustee (1985). Mr. Scott is Ralph M. Parsons
Professor of Law and  Business at Stanford  Law School  (1972) and a Director of
RCM Capital Funds, Inc. (1994).

     ISAAC STEIN,  independent  Trustee (1992).  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 ,  Trustee  (1995).  Mr.  Stowers  is  President,  Chief
Executive Officer and Director of ACC, ACS and ACIS.

     JEANNE D. WOHLERS,  independent  Trustee  (1985).  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

     *JAMES M. BENHAM, President and Chief Executive Officer (1996).

     *WILLIAM  M.  LYONS,  Executive  Vice  President  (1996);   Executive  Vice
President,  Chief  Operating  Officer,  General  Counsel  and  Secretary  of the
Manager, ACS, and ACIS.

     *DOUGLAS A. PAUL,  Secretary  (1988),  Vice President  (1990),  and General
Counsel  (1990);  Secretary  and Vice  President  of the  funds  advised  by the
Manager.

     *C. JEAN WADE, Controller (1996).

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

     The table on the next page summarizes the compensation that the Trustees of
the Funds  received for the Funds'  fiscal year ended March 31, 1996, as well as
the  compensation  received  for  serving as a Director  or Trustee of all other
funds advised by the Manager.

     As of July 31, 1996, the Trust's officers and Trustees,  as a group,  owned
less than 1% of the outstanding shares of each Fund.

INVESTMENT ADVISORY SERVICES

     The Funds have an investment  advisory  agree-ment  with Benham  Management
Corporation  dated June 1, 1995,  that was approved by  shareholders  on May 31,
1995.

     The  Manager  is  a  California  corporation  and  became  a  wholly  owned
subsidiary of ACC on June 1, 1995. The Manager has served as investment

Statement of Additional Information                                         19

<TABLE>
<CAPTION>
TRUSTEE COMPENSATION FOR THE FISCAL YEAR ENDED MARCH 31, 1996

                           Aggregate        Pension or Retirement             Estimated             Total Compensation
     Name of             Compensation     Benefits Accrued As Part         Annual Benefits        From Each Fund and Fund
    Trustee*            From Each Fund        of Fund Expenses             Upon Retirement      Complex** Paid to Trustees
- -----------------------------------------------------------------------------------------------------------------------------------
<S>                    <C>                     <C>                       <C>                             <C>    
Albert Eisenstat       $267  (Government       Not Applicable             Not Applicable                  $29,500
                             Agency)
                         20  (Short-Term)
                        165  (Intermediate-Term)
                         55  (Long-Term)
                        165  (ARM)
                        593  (GNMA)

Ronald J. Gilson     $1,450  (Government       Not Applicable             Not Applicable                  $79,833
                             Agency)
                        885  (Short-Term)
                      1,222  (Intermediate-Term)
                        929  (Long-Term)
                      1,252  (ARM)
                      2,178  (GNMA)

Myron S. Scholes     $1,776  (Government       Not Applicable             Not Applicable                  $69,500
                             Agency)
                      1,066  (Short-Term)
                      1,492  (Intermediate-Term)
                      1,110  (Long-Term)
                      1,549  (ARM)
                      2,683  (GNMA)

Kenneth E. Scott     $2,032  (Government       Not Applicable             Not Applicable                  $75,773
                             Agency)
                      1,084  (Short-Term)
                      1,649  (Intermediate-Term)
                      1,169  (Long-Term)
                      2,702  (ARM)
                      3,258  (GNMA)

Ezra Solomon         $1,765  (Government       Not Applicable             Not Applicable                  $70,249
                             Agency)
                      1,060  (Short-Term)
                      1,481  (Intermediate-Term)
                      1,118  (Long-Term)
                      1,523  (ARM)
                      2,661  (GNMA)

Isaac Stein          $1,791  (Government       Not Applicable             Not Applicable                  $70,500
                      1,068  (Short-Term)
                             Agency)
                      1,503  (Intermediate-Term)
                      1,120  (Long-Term)
                      1,557  (ARM)
                      2,727  (GNMA)

Jeanne D. Wohlers    $1,825  (Government       Not Applicable             Not Applicable                  $71,250
                             Agency)
                      1,069  (Short-Term)
                      1,521  (Intermediate-Term)
                      1,127  (Long-Term)
                      1,571  (ARM)
                      2,799  (GNMA)
- -----------------------------------------------------------------------------------------------------------------------------------
*    Interested Trustees receive no compensation for their services as such.
**   American Century family of funds includes nearly 70 no-load mutual funds.
</TABLE>

20                                                American Century Investments


advisor to the Funds since each Fund's inception.  ACC is a holding company that
owns all of the stock of the  operating  companies  that provide the  investment
management,  transfer agency,  shareholder  service,  and other services for the
American Century family of funds.  James E. Stowers,  Jr. controls ACC by virtue
of his  ownership  of a majority  of its common  stock.  The  Manager has been a
registered investment advisor since 1971.

     Each Fund's  agreement with the Manager  continues for an initial period of
two years and thereafter from year to year provided that,  after the initial two
year  period,  it is  approved  at least  annually  by vote of a majority of the
Fund's  shareholders  or by vote of either a majority of the  Trust's  Trustees,
including a majority of those Trustees who are neither  parties to the agreement
nor interested persons of any such party, cast in person at a meeting called for
the purpose of voting on such approval.

     Each Fund's  investment  advisory  agreement is  terminable  on sixty days'
written notice,  either by the Fund or by the Manager,  to the other party,  and
terminates automatically in the event of its assignment.

     Pursuant to the investment  advisory  agreement,  the Manager provides each
Fund with investment advice and portfolio management services in accordance with
the Fund's  investment  objectives,  policies,  and  restrictions.  The  Manager
determines what securities will be purchased and sold by the Fund and assist the
Trust's officers in carrying out decisions made by the Board of Trustees.

     For  these  services,  each Fund  pays the  Manager  a  monthly  investment
advisory fee based on a percentage  of the Trust's  average  daily net assets to
the following investment advisory fee schedule:

     .50% of the first $100 million;  
     .45% of the next $100 million; 
     .40% of the next $100 million;  
     .35% of the next $100 million;  
     .30% of the next $100 million;  
     .25% of the next $1 billion; 
     .24% of the next $1 billion; 
     .23% of the next $1 billion;  
     .22% of the next $1 billion;  
     .21% of the next $1 billion; 
     .20% of the next $1 billion; and
     .19% of average daily net assets over $6.5 billion.

     Investment  advisory  fees paid by each Fund to the  Manager for the fiscal
years ended March 31, 1996, 1995 and 1994, are indicated in the following table.
Fee amounts are net of reimbursements as described below:

                          Investment Advisory Fees*
- --------------------------------------------------------------------------------
                              Fiscal               Fiscal              Fiscal
Fund 1996                      1995                 1994
- --------------------------------------------------------------------------------
Government Agency           $1,104,214          $1,014,951         $1,073,248
Short-Term Treasury            118,721              60,440             11,846
Intermediate-Term
   Treasury                    867,876             875,087          1,020,441
Long-Term Treasury             174,665              33,915              7,598
ARM Fund                       971,274           1,646,614          3,282,058
GNMA Fund                    2,980,327           2,807,230          3,322,727
- --------------------------------------------------------------------------------
*Net of Reimbursements

TRANSFER AND ADMINISTRATIVE SERVICES

     American  Century  Services  Corporation,  4500 Main  Street,  Kansas City,
Missouri,  64111, (ACS) acts as transfer,  administrative  services and dividend
paying agent for the Funds. ACS provides facilities,  equipment and personnel to
the  Funds  and is paid for  such  services  by the  Funds.  For  administrative
services,  each Fund pays ACS a monthly  fee equal to its pro rata  share of the
dollar  amount  derived from applying the average daily net assets of all of the
Funds advised by the Manager to the following administrative fee rate schedule:

Group Assets                                   Administrative Fee Rate
- --------------------------------------------------------------------------------
up to $4.5 billion                                        .11%
up to $6 billion                                          .10
up to $9 billion                                          .09
over $9 billion                                           .08
- --------------------------------------------------------------------------------

     For transfer  agent  services,  each Fund pays ACS a monthly fee of $1.3958
for  each  shareholder   account  maintained  and  $1.35  for  each  shareholder
transaction executed during that month.

     Administrative  service and  transfer  agent fees paid by each Fund for the
fiscal years ended March 31, 1996, 1995, and 1994 are indicated in the following
tables.  Fee amounts are net of  reimbursements  as described  under the Section
titled "Expense Limitation Agreement."

Statement of Additional Information                                         21


                             Administrative Fees*
- --------------------------------------------------------------------------------
                                 Fiscal           Fiscal              Fiscal
Fund                              1996             1995                1994
- --------------------------------------------------------------------------------
Government Agency              $475,745         $478,410             $564,901
Short-Term Treasury              39,657           30,662               21,286
Intermediate-Term
   Treasury                     301,079          312,814              378,294
Long-Term Treasury               69,302           23,884               19,336
ARM Fund                        423,862          595,079            1,215,816
GNMA Fund                     1,149,339        1,003,636            1,232,514
- --------------------------------------------------------------------------------
*Net of Reimbursements


                              Transfer Agent Fees
- --------------------------------------------------------------------------------
                                 Fiscal           Fiscal              Fiscal
Fund                              1996             1995                1994
- --------------------------------------------------------------------------------
Government Agency              $591,421         $636,462             $863,944
Short-Term Treasury              44,415           36,254               29,973
Intermediate-Term
   Treasury                     283,949          317,653              356,584
Long-Term Treasury              120,818           37,365               26,909
ARM Fund                        329,830          684,702            1,141,251
GNMA Fund                     1,033,782        1,178,768            1,348,081
- --------------------------------------------------------------------------------
*Net of Reimbursements

DISTRIBUTION OF FUND SHARES

     The Funds' shares are distributed by American Century Investment  Services,
Inc. (ACIS),  a registered  broker-dealer  and an affiliate of the Manager.  The
Manager pays all expenses  for  promoting  and  distributing  the Funds'  shares
offered by this  Prospectus.  The Funds do not pay any commissions or other fees
to ACIS or to any other broker-dealers or financial intermediaries in connection
with the distribution of Fund shares.

DIRECT FUND EXPENSES

     Each Fund pays  certain  operating  expenses  that are not  assumed  by the
Manager or ACS.  These  include fees and expenses of the  independent  trustees;
custodian, audit, and pricing fees; fees of outside counsel and counsel employed
directly by the Trust; costs of printing and mailing prospectuses, statements of
additional  information,  notices,  confirmations,  and reports to shareholders;
fees for registering the Funds' shares under federal and state  securities laws;
brokerage fees and commissions;  trade  association  dues; costs of fidelity and
liability  insurance  policies  covering the Fund; costs for incoming WATS lines
maintained  to receive  and handle  shareholder  inquiries;  and  organizational
costs.

EXPENSE LIMITATION AGREEMENT

     The  Manager  has  agreed to limit  each  Fund's  expenses  to a  specified
percentage  of its average daily net assets during the year ending May 31, 1997,
as follows:

- --------------------------------------------------------------------------------
     Government Agency                       .60%
     Short-Term Treasury                     .60%
     Intermediate-Term Treasury              .60%
     Long-Term Treasury                      .60%
     ARM Fund                                .60%
     GNMA Fund                               .60%
     Inflation-Adjusted Treasury*            .50%
- --------------------------------------------------------------------------------
*Expense limitation expires March 1, 1998.

     The Manager may recover amounts  absorbed on behalf of the Funds during the
preceding  11 months if, and to the extent that,  for any given month,  a Fund's
expenses  were less than the expense  limit in effect at that time.  Each Fund's
expense  limit for the years ended May 31,  1996 and 1995,  as a  percentage  of
average daily net assets, was as follows:

                                             1996                   1995
- --------------------------------------------------------------------------------
Government Agency                            .50%                  .50%
Short-Term Treasury                          .65%                  .66%
Intermediate-Term
   Treasury                                  .65%                  .66%
Long-Term Treasury                           .65%                  .66%
ARM Fund                                     .65%                  .60%
GNMA Fund                                    .65%                  .66%
- --------------------------------------------------------------------------------

     Net amounts absorbed or recouped for the fiscal years ended March 31, 1996,
1995, and 1994, are indicated in the table on the following page:

22                                                American Century Investments


                         Net Expense Absorbed (Recouped)
- --------------------------------------------------------------------------------
                              Fiscal              Fiscal               Fiscal
Fund 1996                      1995                1994
- --------------------------------------------------------------------------------
Government Agency             $267,261            $323,152           $451,622
Short-Term Treasury            (4,468)              25,537             45,651
Intermediate-Term
   Treasury                          0                   0                  0
Long-Term Treasury              25,358              33,125             44,468
ARM Fund                      (20,799)              11,331                  0
GNMA Fund                            0                   0                  0
- --------------------------------------------------------------------------------

ADDITIONAL PURCHASE AND REDEMPTION INFORMATION

     The  Funds'  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.

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

     As of January 31, 1997,  to the  knowledge of the Trust,  the  shareholders
listed in the following chart were the only record holders of greater than 5% of
the outstanding shares of the individual Funds.

FUND                                            SHORT-TERM TREASURY
- --------------------------------------------------------------------------------
Shareholder Name and                            Charles Schwab & Co.
Address                                         101 Montgomery Street
                                                San Francisco, CA 94104
# of Shares Held                                648,994.237
% of Total Shares
Outstanding                                     18.5%
- --------------------------------------------------------------------------------
Shareholder Name and                            J. Harris Morgan
Address                                         P.O. Box 556
                                                Greenville, TX 75401
# of Shares Held                                314,615.935
% of Total Shares
Outstanding                                     8.5%
- --------------------------------------------------------------------------------
Shareholder Name and                            Allied Clearings Co.
Address                                         P.O. Box 94303
                                                Pasadena, CA 91109
# of Shares Held                                294,701.089
% of Total Shares
Outstanding                                     8.0%
- --------------------------------------------------------------------------------


FUND                                            INTERMEDIATE-TERM TREASURY
- --------------------------------------------------------------------------------
Shareholder Name and                            Chase Manhattan Bank NA
Address                                         770 Broadway 10th FL
                                                New York, NY 10003
# of Shares Held                                3,267,134.187
% of Total Shares
Outstanding                                     9.7%
- --------------------------------------------------------------------------------
Shareholder Name and                            Charles Schwab & Co.
Address                                         101 Montgomery Street
                                                San Francisco, CA 94104
# of Shares Held                                3,243,089.633
% of Total Shares
Outstanding                                     9.7%
- --------------------------------------------------------------------------------


FUND                                            LONG-TERM TREASURY
- --------------------------------------------------------------------------------
Shareholder Name and                            Charles Schwab & Co.
Address                                         101 Montgomery Street
                                                San Francisco, CA 94104
# of Shares Held                                6,257,951.157
% of Total Shares
Outstanding                                     50.8%
- --------------------------------------------------------------------------------

Statement of Additional Information                                        23


FUND                                            ARM FUND
- --------------------------------------------------------------------------------
Shareholder Name and                            Charles Schwab & Co.
Address                                         101 Montgomery Street
                                                San Francisco, CA 94104
# of Shares Held                                1,457,039.198
% of Total Shares
Outstanding                                     5.7%
- --------------------------------------------------------------------------------

Fund                                            GNMA Fund
- --------------------------------------------------------------------------------
Shareholder Name and                            Charles Schwab & Co.
Address                                         101 Montgomery Street
                                                San Francisco, CA 94104
# of Shares Held                                18,712,115.632
% of Total Shares
Outstanding                                     17.3%
- --------------------------------------------------------------------------------

     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.

     Share purchases and redemptions are governed by California law.

OTHER INFORMATION

     For  further  information,  please  refer  to  registration  statement  and
exhibits on file with the SEC in Washington,  D.C. 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.

24                                                American Century Investments


                                      NOTES

Statement of Additional Information                                  Notes  25



P.O. Box 419200
Kansas City, Missouri
64141-6200

Person-to-person assistance:
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 816-753-1865

Fax: 816-340-7962

Internet: www.americancentury.com


                            [American Century logo]
                                    American
                                  Century(sm)

9702           [recycled logo]
SH-BKT-7642       Recycled





AMERICAN CENTURY GOVERNMENT INCOME TRUST


1933 Act Post-Effective Amendment No. 31
1940 Act Amendment No. 32
- --------------------------------------------------------------------------------

PART C            OTHER INFORMATION

Item 24. Financial Statements and Exhibits

(a)       FINANCIAL STATEMENTS.  Audited financial statements for each series of
          American  Century  Government  Income  Trust for the fiscal year ended
          March 31, 1996, are filed herein as included in the Trust's  Statement
          of  Additional  Information  by reference  to the Annual  Report dated
          March   31,   1996,    filed   on   May   24,   1996    (Accession   #
          0000773674-96-000002).

(b)      EXHIBITS.

         (1)      (a) Agreement and  Declaration of Trust dated May 31, 1995, is
                  incorporated   herein   by   reference   to   Exhibit   1   of
                  Post-Effective   Amendment  No.  28  filed  on  May  29,  1996
                  (Accession # 0000773674-96-000004).

                  (b)  Amendment to the  Declaration  of Trust dated October 21,
                  1996 is included herein.

                  (c)  Amendment to the  Declaration  of Trust dated January 20,
                  1997 with respect to the American Century - Benham  Inflation-
                  Adjusted Treasury Fund is included herein.

         (2)      Amended  and  Restated   Bylaws,   dated  May  17,  1995,  are
                  incorporated   herein   by   reference   to   Exhibit   2   of
                  Post-Effective   Amendment  No.  28  filed  on  May  29,  1996
                  (Accession # 0000773674-96-000004).

         (3)      Not applicable.

         (4)      (a) Specimen copy of American Century - Benham GNMA Fund share
                  certificate is  incorporated  herein by reference to Exhibit 4
                  to the registration statement filed on July 26, 1985.

                  (b) Specimen copy of American Century - Benham Adjustable Rate
                  Government  Securities Fund share  certificate is incorporated
                  herein by reference to Exhibit 4 to  Post-Effective  Amendment
                  No. 17 filed on September 30, 1991.

                  (c)   Specimen    copy   of   American    Century   -   Benham
                  Intermediate-Term   Treasury   Fund   share   certificate   is
                  incorporated   herein   by   reference   to   Exhibit   4   to
                  Post-Effective Amendment No. 18 filed on November 27, 1991.

                  (d)  Specimen  copy of  American  Century - Benham  Government
                  Agency Money  Market Fund share  certificate  is  incorporated
                  herein by reference to Exhibit 4 to  Post-Effective  Amendment
                  No. 18 filed on November 27, 1991.

                  (e)  Specimen  copy of  American  Century - Benham  Short-Term
                  Treasury  Fund share  certificate  is  incorporated  herein by
                  reference to Exhibit 4(e) to  Post-Effective  Amendment No. 24
                  filed on November 29, 1992.

                  (f)  Specimen  copy of  American  Century  - Benham  Long-Term
                  Treasury  Fund share  certificate  is  incorporated  herein by
                  reference to Exhibit 4(f) to  Post-Effective  Amendment No. 24
                  filed on November 29, 1992.

                  (g)   Specimen    copy   of   American    Century   -   Benham
                  Inflation-Adjusted Treasury Fund share certificate is included
                  herein.

         (5)      Investment   Advisory   Agreement   between  American  Century
                  Government  Income  Trust and Benham  Management  Corporation,
                  dated June 1, 1995,  is  incorporated  herein by  reference to
                  Exhibit 5 of Post-Effective  Amendment No. 28 filed on May 29,
                  1996 (Accession # 0000773674-96-000004).

         (6)      Distribution  Agreement  between American  Century  Government
                  Income Trust and American Century  Investment  Services,  Inc.
                  dated as of  September  3,  1996,  is  incorporated  herein by
                  reference  to  Exhibit 6 to  Post-Effective  Amendment  No. 30
                  filed on November 25, 1996 (Accession #773674-96-000009).

         (7)      Not applicable.

         (8)      Custodian Agreement between American Century Government Income
                  Trust and The Chase Manhattan  Bank,  dated August 9, 1996, is
                  included herein.

         (9)      Administrative  Services and Transfer Agency Agreement between
                  American Century  Government Income Trust and American Century
                  Services  Corporation,  dated  as of  September  3,  1996,  is
                  incorporated   herein   by   reference   to   Exhibit   9   to
                  Post-Effective  Amendment  No. 30 filed on  November  25, 1996
                  (Accession #773674-96-000009).

         (10)     (a) Opinion  and consent of counsel as to the  legality of the
                  securities   being   registered,   dated   May  16,   1996  is
                  incorporated herein by reference to Rule 24f-2 Notice filed on
                  May 16, 1996 (Accession # 773674-96-000001).

                  (b) Opinion  and consent of counsel as to the  legality of the
                  American  Century - Benham  Inflation-Adjusted  Treasury  Fund
                  dated February 7, 1997 is included herein.

         (11)     Consent of KPMG Peat Marwick  LLP,  independent  auditors,  is
                  included herein.

         (12)     Not applicable.

         (13)     Not applicable.

         (14)     (a) Benham Individual  Retirement Account Plan,  including all
                  instructions  and other  relevant  documents,  dated  February
                  1992, is incorporated  herein by reference to Exhibit 14(a) to
                  Post-Effective Amendment No. 23 filed on September 28, 1992.

                  (b)  Benham   Pension/Profit   Sharing  plan,   including  all
                  instructions  and other  relevant  documents,  dated  February
                  1992, is incorporated  herein by reference to Exhibit 14(b) to
                  Post-Effective Amendment No. 23 filed on September 28, 1992.

         (15)     Not applicable.

         (16)     Schedule  for  computation  of  each   performance   quotation
                  provided  in  response  to Item 22 is  incorporated  herein by
                  reference  to Exhibit 16 of  Post-Effective  Amendment  No. 28
                  filed on May 29, 1996 (Accession # 0000773674-96-000004).

         (17)     Power of Attorney dated March 4, 1996 is  incorporated  herein
                  by reference to Exhibit 17 of Post-Effective  Amendment No. 28
                  filed on May 29, 1996 (Accession # 0000773674-96-000004).

Item 25. Persons Controlled by or Under Common Control with Registrant.

Not applicable.

Item 26. Number of Holders of Securities.

As of November 22, 1996, each series of Benham Government Income Trust had the
following number shareholders of record:

  American Century - Benham Government Agency Money Market Fund          18,582
  American Century - Benham Short-Term Treasury Fund                      1,186
  American Century - Benham Intermediate-Term Treasury Fund              10,803
  American Century - Benham Long-Term Treasury Fund                       3,238
  American Century - Benham Adjustable Rate Government Securities Fund   13,605
  American Century - Benham GNMA Fund                                    41,823

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 to Post-Effective  Amendment No. 28 filed on May 29, 1996 (Accession #
0000773674-96-000004).

Item 28. Business and Other Connections of Investment Advisor.

The Registrant's  investment advisor,  Benham Management  Corporation,  provides
investment  advisory  services for various  collective  investment  vehicles and
institutional  clients and serves as investment  advisor to a number of open-end
investment companies.

Item 29. Principal Underwriters.

The Registrant's distribution agent, American Century Investment Services, Inc.,
is distribution  agent to American  Century  Capital  Preservation  Fund,  Inc.,
American Century Capital Preservation Fund II, Inc., American Century California
Tax-Free and Municipal Funds, American Century Government Income Trust, American
Century  Municipal Trust,  American Century Target  Maturities  Trust,  American
Century  Quantitative  Equity  Funds,   American  Century  International  Funds,
American  Century   Investment  Trust,   American  Century  Manager  Funds,  TCI
Portfolios,  Inc., American Century Capital  Portfolios,  Inc., American Century
Mutual Funds, Inc.,  American Century Premium Reserves,  Inc.,  American Century
Strategic Asset Allocations,  Inc. and American Century World Mutual Funds, Inc.
The  information  required with respect to each director,  officer or partner of
American Century Investment  Services,  Inc. is incorporated herein by reference
to American  Century  Investment  Services,  Inc. Form B-D filed on November 21,
1985 (SEC File No. 8-35220; Firm CRD No. 17437).

Item 30. Location of Accounts and Records.

Benham Management Corporation,  the Registrant's  investment advisor,  maintains
its principal  office at 1665  Charleston  Road,  Mountain  View, CA 94043.  The
Registrant  and its agent for transfer  and  administrative  services,  American
Century Services Corporation,  maintain 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. The computer and data
base for shareholder records are located at Central Computer Facility, 401 North
Broad Street, Sixth Floor, Philadelphia, PA 19108.

Item 31. Management Services.

Not applicable.

Item 32. Undertakings.

(a)  Registrant  undertakes  to  furnish  each  person to whom a  Prospectus  is
     delivered with a copy of the  Registrant's  latest report to  shareholders,
     upon request and without charge.

(b)  Registrant   hereby   undertakes   to  file,   with   respect  to  American
     Century--Benham   Inflation-Adjusted   Treasury   Fund,  a   post-effective
     amendment using financial  statements  which need not be certified,  within
     four to six months from the effective date of this Amendment.

(c)  Registrant hereby undertakes to call a meeting of shareholders of the Trust
     upon  written  request of  shareholders  owning at least  one-tenth  of the
     outstanding shares.




                                   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. 31/Amendment No. 32 to be signed on its behalf by the undersigned,
thereunto duly authorized, in the City of Mountain View, and State of
California, on the 7th day of February, 1997. I hereby certify that this
Amendment meets the requirements for immediate effectiveness pursuant to Rule
485(a).

                           AMERICAN CENTURY GOVERNMENT INCOME TRUST


                           By: /s/ Douglas A. Paul
                               Douglas A. Paul
                               Vice President and Associate General Counsel

Pursuant to the requirements of the Securities Act of 1933, this Post-Effective
Amendment No. 31/Amendment No. 32 has been signed below by the following persons
in the capacities and on the dates indicated.

<TABLE>
<CAPTION>
                                                                            Date
<S>                                  <C>                                    <C>
*                                    Chairman of the Board of Trustees,     February 7, 1997
- ---------------------------------    President, and
James M. Benham                      Chief Executive Officer

*                                    Trustee                                February 7, 1997
- ---------------------------------
Albert A. Eisenstat

*                                    Trustee                                February 7, 1997
- ---------------------------------
Ronald J. Gilson

*                                    Trustee                                February 7, 1997
- ---------------------------------
Myron S. Scholes

*                                    Trustee                                February 7, 1997
- ---------------------------------
Kenneth E. Scott

*                                    Trustee                                February 7, 1997
- ---------------------------------
Isaac Stein

*                                    Trustee                                February 7, 1997
- ---------------------------------
James E. Stowers III

*                                    Trustee                                February 7, 1997
- ---------------------------------
Jeanne D. Wohlers

*                                    Chief Financial Officer, Treasurer     February 7, 1997
- ---------------------------------
Maryanne Roepke
</TABLE>


/s/ Douglas A. Paul
*by Douglas A. Paul, Attorney in Fact (pursuant to a Power of Attorney dated 
March 4, 1996).


EXHIBIT     DESCRIPTION

EX-99.B1    a)  Agreement  and  Declaration  of Trust  dated  May 31,  1995,  is
            incorporated  herein by  reference  to  Exhibit 1 of  Post-Effective
            Amendment   No.   28   filed   on  May   29,   1996   (Accession   #
            0000773674-96-000004).

            b)  Amendment to the Declaration of Trust dated  October 21, 1996 is
            included herein.

            c) Amendment to the Declaration of Trust dated January 20, 1997 with
            respect to the American Century - Benham Inflation-Adjusted Treasury
            Fund is included herein.

EX-99.B2    Amended and Restated Bylaws,  dated May 17, 1995, are incorporated
            herein by reference to Exhibit 2 of Post-Effective  Amendment No. 28
            filed on May 29, 1996 (Accession # 0000773674-96-000004).

EX-99.B4)   a)  Specimen  copy of  American  Century - Benham  GNMA  Fund  share
            certificate is incorporated  herein by reference to Exhibit 4 to the
            registration statement filed on July 26, 1985.

            b)  Specimen  copy of  American  Century  - Benham  Adjustable  Rate
            Government  Securities Fund share certificate is incorporated herein
            by reference to Exhibit 4 to  Post-Effective  Amendment No. 17 filed
            on September 30, 1991.

            c)  Specimen  copy of  American  Century - Benham  Intermediate-Term
            Treasury Fund share certificate is incorporated  herein by reference
            to Exhibit 4 to  Post-Effective  Amendment  No. 18 filed on November
            27, 1991.

            d) Specimen  copy of  American  Century - Benham  Government  Agency
            Money  Market  Fund  share  certificate  is  incorporated  herein by
            reference to Exhibit 4 to  Post-Effective  Amendment No. 18 filed on
            November 27, 1991.

            e) Specimen copy of American  Century - Benham  Short-Term  Treasury
            Fund  share  certificate  is  incorporated  herein by  reference  to
            Exhibit 4(e) to  Post-Effective  Amendment  No. 24 filed on November
            29, 1992.

            f) Specimen  copy of American  Century - Benham  Long-Term  Treasury
            Fund  share  certificate  is  incorporated  herein by  reference  to
            Exhibit 4(f) to  Post-Effective  Amendment  No. 24 filed on November
            29, 1992.

            g)  Specimen  copy of American  Century - Benham  Inflation-Adjusted
            Treasury Fund share certificate is included herein.

EX-99.B5    Investment  Advisory  Agreement between American Century  Government
            Income Trust and Benham Management Corporation,  dated June 1, 1995,
            is incorporated  herein by reference to Exhibit 5 of  Post-Effective
            Amendment   No.   28   filed   on  May   29,   1996   (Accession   #
            0000773674-96-000004).

EX-99.B6    Distribution  Agreement  between American Century  Government Income
            Trust and American  Century  Investment  Services,  Inc. dated as of
            September 3, 1996, is incorporated  herein by reference to Exhibit 6
            to  Post-Effective  Amendment  No.  30 filed on  November  25,  1996
            (Accession #773674-96-000009).

EX-99.B8    Custodian Agreement between American Century Government Income Trust
            and The Chase  Manhattan  Bank,  dated  August 9, 1996,  is included
            herein.

EX-99.B9    Administrative   Services  and  Transfer  Agency  Agreement  between
            American  Century  Government  Income  Trust  and  American  Century
            Services Corporation, dated as of September 3, 1996, is incorporated
            herein by reference to Exhibit 9 to Post-Effective  Amendment No. 30
            filed on November 25, 1996 (Accession #773674-96-000009).

EX-99.B10   a)  Opinion  and  consent  of  counsel  as to  the  legality  of the
            securities  being  registered,  dated May 16,  1996 is  incorporated
            herein by  reference  to Rule  24f-2  Notice  filed on May 16,  1996
            (Accession # 773674-96-000001).

            b) Opinion and consent of counsel as to the legality of the American
            Century - Benham Inflation-Adjusted  Treasury Fund dated February 7,
            1997 is included herein.

EX-99.B11   Consent of KPMG Peat Marwick LLP, independent  auditors, is included
            herein.

EX-99.B14   a)  Benham  Individual   Retirement  Account  Plan,   including  all
            instructions and other relevant  documents,  dated February 1992, is
            incorporated  herein by reference to Exhibit 14(a) to Post-Effective
            Amendment No. 23 filed on September 28, 1992.

            b) Benham  Pension/Profit  Sharing plan,  including all instructions
            and other relevant  documents,  dated February 1992, is incorporated
            herein by reference to Exhibit 14(b) to Post-Effective Amendment No.
            23 filed on September 28, 1992.

EX-99.B16   Schedule for computation of each performance  quotation  provided in
            response to Item 22 is  incorporated  herein by reference to Exhibit
            16 of  Post-Effective  Amendment  No.  28  filed  on  May  29,  1996
            (Accession # 0000773674-96-000004).

EX-99.B17   Power of  Attorney  dated  March 4, 1996 is  incorporated  herein by
            reference to Exhibit 17 of Post-Effective  Amendment No. 28 filed on
            May 29, 1996 (Accession # 0000773674-96-000004).

EX-27.5.1   FDS for American Century - Benham GNMA Fund.

EX-27.5.2   FDS for American Century - Benham Intermediate-Term Treasury Fund.

EX-27.4.3   FDS for  American  Century - Benham  Government  Agency Money Market
            Fund.

EX-27.5.4   FDS  for  American  Century  -  Benham  Adjustable  Rate  Government
            Securities Fund.

EX-27.5.5   FDS for American Century - Benham Short-Term Treasury Fund.

EX-27.5.6   FDS for American Century - Benham Long-Term Treasury Fund.




                                    AMENDMENT
                                     TO THE
                              DECLARATION OF TRUST
                                       OF
                         BENHAM GOVERNMENT INCOME TRUST

                                October 21, 1996

         WHEREAS,  Section 1 of Article I of the  Declaration  of Trust provides
that the Trustees may designate a new name for the Trust,  or any 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 change  the name of the Trust and its  Series as set
forth below;

         RESOLVED,  that the Trust shall  henceforth  be known as the  "American
Century Government Income Trust";

         RESOLVED  FURTHER,  that the existing Series be renamed as follows (new
language appears in boldface type, deleted language is struck through):

<TABLE>

<S>                                                          <C>    
FORMER NAME                                                  NEW NAME
- ------------------------------------------------------------ --------------------------------------------------------

Benham Short-Term Treasury & Agency Fund                           American  Century  - Benham  Short-Term  Treasury
                                                                      Fund

- ------------------------------------------------------------ --------------------------------------------------------
Benham Treasury Note Fund                                          American   Century  -  Benham   Intermediate-Term
                                                                      Treasury Fund

- ------------------------------------------------------------ --------------------------------------------------------
Benham Long-Term Treasury & Agency Fund                            American Century - Benham Long-Term Treasury Fund

- ------------------------------------------------------------ --------------------------------------------------------
Benham Government Agency Fund                                      American  Century  -  Benham   Government  Agency
                                                                      Money Market Fund

- ------------------------------------------------------------ --------------------------------------------------------
Benham Adjustable Rate Government Securities Fund                  American   Century  -  Benham   Adjustable   Rate
                                                                      Government Securities Fund

- ------------------------------------------------------------ --------------------------------------------------------
Benham GNMA Income Fund                                            American Century - Benham GNMA Fund

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



TRUSTEES OF THE BENHAM GOVERNMENT INCOME TRUST

/s/ James M. Benham                       10/21/96          /s/ Ezra Solomon                          10/21/96
- ----------------------------------------  -------------     ----------------------------------------  --------
James M. Benham*                          Date              Ezra Solomon*                             Date


/s/ Albert A. Eisenstat                   10/21/96          /s/ Isaac Stein                           10/21/96
- ----------------------------------------  -------------     ----------------------------------------  --------
Albert A. Eisenstat*                      Date              Isaac Stein*                              Date


/s/ Ronald J. Gilson                      10/21/96          /s/ James E. Stowers III                  10/21/96
- ----------------------------------------  -------------     ----------------------------------------  --------
Ronald J. Gilson*                         Date              James E. Stowers III*                     Date


/s/ Myron S. Scholes                      10/21/96          /s/ Jeanne D. Wohlers                     10/21/96
- ----------------------------------------  -------------     ----------------------------------------  --------
Myron S. Scholes*                         Date              Jeanne D. Wohlers*                        Date


/s/ Kenneth E. Scott                      10/21/96
- ----------------------------------------  --------
Kenneth E. Scott*                         Date



*By:   /s/Douglas A. Paul                                Date:  October 21, 1996
       --------------------------------------------------
       Douglas A. Paul, Esq.
       Pursuant to Power of Attorney dated March 4, 1996
</TABLE>



                                 AMENDMENT NO. 2
                                     TO THE
                              DECLARATION OF TRUST
                                       OF

                    AMERICAN CENTURY GOVERNMENT INCOME TRUST

                           Effective January 20, 1997

         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 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 Series of Shares to be  designated  as
"American Century - Benham Inflation-Adjusted Treasury Fund";

         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 GNMA Fund, American Century - Benham Government Agency
         Money Market Fund,  American Century - Benham Short-Term Treasury Fund,
         American  Century - Benham  Intermediate-Term  Treasury Fund,  American
         Century - Benham Long-Term  Treasury Fund and American Century - Benham
         Inflation  Adjusted  Treasury  Fund as  Series  of the  Trust  with the
         relative  rights and  preferences  as described in Section 6 of Article
         III.

         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/ James M. Benham                       1/20/97           /s/ Ezra Solomon                          1/20/97
- ----------------------------------------  -------------     ----------------------------------------  -------
James M. Benham*                          Date              Ezra Solomon*                             Date


/s/ Albert A. Eisenstat                   1/20/97           /s/ Isaac Stein                           1/20/97
- ----------------------------------------  -------------     ----------------------------------------  -------
Albert A. Eisenstat*                      Date              Isaac Stein*                              Date


/s/ Ronald J. Gilson                      1/20/97           /s/ James E. Stowers III                  1/20/97
- ----------------------------------------  -------------     ----------------------------------------  -------
Ronald J. Gilson*                         Date              James E. Stowers III*                     Date


/s/ Myron S. Scholes                      1/20/97           /s/ Jeanne D. Wohlers                     1/20/97
- ----------------------------------------  -------------     ----------------------------------------  -------
Myron S. Scholes*                         Date              Jeanne D. Wohlers*                        Date


/s/ Kenneth E. Scott                      1/20/97
- ----------------------------------------  -------
Kenneth E. Scott*                         Date



*By:   /s/Douglas A. Paul                                Date:  January 20, 1997
       -------------------------------------------------
       Douglas A. Paul, Esq.
       Pursuant to Power of Attorney dated March 4, 1996
</TABLE>



           AMERICAN CENTURY - BENHAM INFLATION-ADJUSTED TREASURY FUND

                        A Series of the Capital Stock of

                    American Century Government Income Trust
             Organized Under the Laws of the State of Massachusetts


   NUMBER                            DATED                            SHARES



This is to Certify that



    IS THE OWNER OF THE FULLY PAID AND NON-ASSESSABLE SHARES STATED ABOVE OF

           American Century - Benham Inflation-Adjusted Treasury Fund

                                 Investor Class

A series of the Capital  Stock,  No Par Value,  of American  Century  Government
                                  Income Trust


                             [american century logo]
                                    American
                                   Century(sm)


                                         [printed vertically along right margin]
                                                                 Countersigned:


                                          By----------------------Transfer Clerk



The Corporation will furnish without charge to each Shareholder who so requests
   in writing the preferences, voting powers, qualifications, and special and
relative rights of the shares each class and series of stock of the Corporation.
This certificate and the shares represented hereby are issued and shall be held
     subject to all the provisions of the Articles of Incorporation of the
   Corporation and all amendments thereto, copes of which are on file at the
  executive offices of the Corporation, and the holder hereof by acceptance of
this certificate consents and agrees to be bound by all of said provisions. This
certificate is not valid until countersigned by an authorized Transfer Clerk of
  the Corporation. WITNESS the facsimile signatures of the Corporation's duly
                              authorized officers.

/s/Douglas A. Paul                                            /s/James M. Benham
Douglas A. Paul                                               James M. Benham
SECRETARY                                                     PRESIDENT

                             [front of certificate]



FOR VALUE RECEIVED,--------------HEREBY SELL, ASSIGN AND TRANSFER

unto ---------------------------------------------------------------------------

- --------------------------------------------------------------------------Shares

of the  Common  Stock  represented  by the  within  Certificate,  and to  hereby

irrevocably constitute and appoint

- ------------------------------------------------------------------------Attorney

to  transfer  the said Stock on the books of the within  names  issuer with full

power of substitution in the premises.

DATED:--------------------                           ---------------------------
                                                     Signature

                                                     ---------------------------
                                                     Signature
(signature guarantee stamp)


[printed vertically along far right margin]

         NOTICE:  The  signatures(s) on this assignment must correspond with the
name(s)  as  written  upon the  face of the  certificate,  in every  particular,
without alteration or any change whatever.

         The signature(s) must be guaranteed by a bank or trust company,  credit
union,  broker-dealer,  securities  exchange or association,  clearing agency or
savings  associations,  as  defined  by  federal  law.  Notarized  or  witnessed
signatures are not acceptable as guaranteed signatures.

                             [back of certificate]







[chase logo]CHASE

                            GLOBAL CUSTODY AGREEMENT



         This  AGREEMENT  is  effective  August 9, 1996,  and is among THE CHASE
MANHATTAN BANK ("Bank"),  each of the TWENTIETH  CENTURY and BENHAM funds listed
on Appendix A hereto (each a  "Customer")  and  INVESTORS  RESEARCH  CORPORATION
("IRC").


1.       Customer Accounts.

         Bank shall establish and maintain the following accounts ("Accounts"):

         (a) A custody account in the name of Customer  ("Custody  Account") for
any and all  stocks,  shares,  bonds,  debentures,  notes,  mortgages  or  other
obligations  for the  payment  of  money,  bullion,  coin and any  certificates,
receipts, warrants or other instruments representing rights to receive, purchase
or subscribe  for the same or  evidencing  or  representing  any other rights or
interests   therein  and  other  similar   property   whether   certificated  or
uncertificated  as may be  received by Bank or its  Subcustodian  (as defined in
Section 3) for the account of Customer ("Securities"); and

         (b) A deposit account in the name of Customer  ("Deposit  Account") for
any and all cash in any currency  received by Bank or its  Subcustodian  for the
account of Customer,  which cash shall not be subject to  withdrawal by draft or
check.

         Customer  warrants its authority to: 1) deposit the cash and Securities
("Assets")  received in the  Accounts  and 2) give  Instructions  (as defined in
Section 11)  concerning  the Accounts.  Bank may deliver  securities of the same
class in place of those deposited in the Custody Account.

         Upon written agreement between Bank and Customer,  additional  Accounts
may  be  established  and  separately   accounted  for  as  additional  Accounts
hereunder.

2.       Maintenance of Securities and Cash at Bank and Subcustodian Locations.

         Unless Instructions specifically require another location acceptable to
Bank:

         (a) Securities  shall be held in the country or other  jurisdiction  in
which the principal  trading market for such  Securities is located,  where such
Securities  are to be  presented  for  payment  or  where  such  Securities  are
acquired; and

         (b)  Cash  shall  be  credited  to an  account  in a  country  or other
jurisdiction  in  which  such  cash may be  legally  deposited  or is the  legal
currency for the payment of public or private debts.

                                  [front page]

         Cash  may be held  pursuant  to  Instructions  in  either  interest  or
non-interest  bearing accounts as may be available for the particular  currency.
To  the  extent   Instructions   are  issued  and  Bank  can  comply  with  such
Instructions,  Bank is  authorized  to  maintain  cash  balances  on deposit for
Customer  with itself or one of its  "Affiliates"  at such  reasonable  rates of
interest as may from time to time be paid on such accounts,  or in  non-interest
bearing  accounts as Customer may direct,  if acceptable  to Bank.  For purposes
hereof, the term "Affiliate" shall mean an entity controlling, controlled by, or
under common control with, Bank.

         If Customer  wishes to have any of its Assets held in the custody of an
institution other than the established Subcustodians as defined in Section 3 (or
their securities depositories), such arrangement must be authorized by a written
agreement, signed by Bank and Customer.

3.       Subcustodians and Securities Depositories.

         Bank may act hereunder through the  subcustodians  listed in Schedule A
hereof   with   which   Bank   has   entered   into   subcustodial    agreements
("Subcustodians").  Customer  authorizes  Bank to hold Assets in the Accounts in
accounts  which  Bank  has  established  with  one or  more of its  branches  or
Subcustodians.  Bank  and  Subcustodians  are  authorized  to  hold  any  of the
Securities  in  their  account  with any  securities  depository  in which  they
participate.

         Bank  reserves the right to add new,  replace or remove  Subcustodians.
Customer shall be given reasonable notice by Bank of any amendment to Schedule A
and Customer reserves the right to reject any additional Subcustodian,  it being
understood  that  Customer  shall  have no right to  require  Bank to  appoint a
Subcustodian.  Upon request by Customer,  Bank shall identify the name,  address
and principal place of business of any Subcustodian of Customer's Assets and the
name and address of the governmental  agency or other regulatory  authority that
supervises or regulates such Subcustodian.

4.       Use of Subcustodian.

         (a) Bank  shall  identify  the  Assets  on its  books as  belonging  to
Customer.

         (b)  A  Subcustodian  shall  hold  such  Assets  together  with  assets
belonging  to  other   customers  of  Bank  in  accounts   identified   on  such
Subcustodian's  books as custody accounts for the exclusive benefit of customers
of Bank.

         (c) Any Assets in the Accounts held by a Subcustodian  shall be subject
only  to the  instructions  of  Bank  or its  agent.  Any  Securities  held in a
securities depository for the account of a Subcustodian shall be subject only to
the instructions of such Subcustodian.

         (d) Any  agreement  Bank  enters into with a  Subcustodian  for holding
Bank's  customers' assets shall provide that such assets shall not be subject to
any right, charge, security interest, lien or claim of any kind in favor of such
Subcustodian except for safe custody or administration,  and that the beneficial
ownership  of such assets  shall be freely  transferable  without the payment of
money or value  other than for safe  custody or  administration.  The  foregoing
shall not apply to the extent of any special  agreement or  arrangement  made by
Customer with any particular Subcustodian.

5.       Deposit Account Transactions.

         (a) Bank or its  Subcustodians  shall make  payments  from the  Deposit
Account upon receipt of Instructions  which include all information  required by
Bank.

                                       2


         (b) In the event  that any  payment  to be made  under  this  Section 5
exceeds the funds available in the Deposit Account, Bank, in its discretion, may
advance  Customer  such excess  amount  which shall be deemed a loan  payable on
demand,  bearing  interest  at the rate  customarily  charged by Bank on similar
loans.

         (c) If Bank credits the Deposit  Account on a payable  date,  or at any
time prior to actual collection and reconciliation to the Deposit Account,  with
interest,  dividends,  redemptions  or any  other  amount  due,  Customer  shall
promptly return any such amount upon oral or written notification: (i) that such
amount has not been  received  in the  ordinary  course of business or (ii) that
such amount was incorrectly  credited.  If Customer does not promptly return any
amount upon such notification Customer shall advise bank of the reasons therefor
and Bank shall give reasonable  consideration thereto;  provided that Bank shall
be entitled,  upon oral or written  notification  to  Customer,  to reverse such
credit by debiting the Deposit Account for the amount previously credited.  Bank
or its  Subcustodian  shall  have no  duty  or  obligation  to  institute  legal
proceedings,  file a claim or a proof of claim in any  insolvency  proceeding or
take any other action with respect to the collection of such amount, but may act
for Customer upon Instructions after consultation with Customer.

6.       Custody Account Transactions.

         (a) Securities shall be transferred,  exchanged or delivered by Bank or
its  Subcustodian  upon  receipt  by  Bank of  Instructions  which  include  all
information  required by Bank.  Settlement and payment for  Securities  received
for,  and  delivery of  Securities  out of, the  Custody  Account may be made in
accordance  with the customary or established  securities  trading or securities
processing  practices and procedures in the  jurisdiction or market in which the
transaction occurs, including,  without limitation,  delivery of Securities to a
purchaser,  dealer or their  agents  against a receipt with the  expectation  of
receiving  later payment and free  delivery.  Delivery of Securities  out of the
Custody  Account  may  also be  made  in any  manner  specifically  required  by
Instructions acceptable to Bank.

         (b) Bank,  in its  discretion,  may credit or debit the  Accounts  on a
contractual  settlement  date with cash or Securities  with respect to any sale,
exchange  or purchase  of  Securities.  Otherwise,  such  transactions  shall be
credited or debited to the Accounts on the date cash or Securities  are actually
received by Bank and reconciled to the Account.

                  (i) Bank may reverse credits or debits made to the Accounts in
         its  discretion  if the related  transaction  fails to settle  within a
         reasonable  period,  determined  by Bank in its  discretion,  after the
         contractual settlement date for the related transaction.

                  (ii) If any  Securities  delivered  pursuant to this Section 6
         are returned by the recipient thereof, Bank may reverse the credits and
         debits of the particular transaction at any time.

         (c) In reviewing bearer Securities  (excluding STRIPS),  Bank shall, as
part of the  delivery to and  settlement  for the Account by it, use  reasonable
efforts  to  cross-reference  the  certificate  number  for any such  securities
against the applicable  Securities  Information  Center ("SIC")  report.  In the
event that Bank confirms that a Security is identified on such report,  it shall
promptly so advise Customer in writing.  Bank expressly  disclaims any liability
for the:  (i)  accuracy  or  completeness  of both any SIC report and Bank's own
review  process;  and (ii) validity,  legality or  authenticity of any Security.
Customer acknowledges the foregoing limitations of liability and shall hold Bank
harmless with respect to Bank's performance as described herein.

7.       Actions of Bank.

         Bank shall follow  Instructions  received  regarding assets held in the
Accounts. However, until it receives Instructions to the contrary, Bank shall:


                                       3


                  (i)  Present  for  payment  any  Securities  which are called,
         redeemed  or retired or  otherwise  become  payable and all coupons and
         other  income items which call for payment  upon  presentation,  to the
         extent  that  Bank  or   Subcustodian   is   actually   aware  of  such
         opportunities.

                  (ii) Execute in the name of Customer such  ownership and other
         certificates  as may be  required  to obtain  payments  in  respect  of
         Securities.

                  (iii) Exchange  interim  receipts or temporary  Securities for
         definitive Securities.

                  (iv) Appoint brokers and agents for any transaction  involving
         the Securities,  including,  without limitation,  Affiliates of Bank or
         any Subcustodian.

                  (v) Issue  statements to Customer,  at times  mutually  agreed
         upon, identifying the Assets in the Accounts.

         Bank shall send Customer an advice or  notification of any transfers of
Assets to or from the Accounts. Such statements,  advices or notifications shall
indicate  the  identity  of the  entity  having  custody of the  Assets.  Unless
Customer  sends Bank a written  exception  or  objection  to any Bank  statement
within  sixty (60) days of receipt,  Customer  shall be deemed to have  approved
such statement. In such event, or where Customer has otherwise approved any such
statement, Bank shall, to the extent permitted by law, be released, relieved and
discharged with respect to all matters set forth in such statement or reasonably
implied  therefrom  as though it had been  settled  by the  decree of a court of
competent  jurisdiction  in an action where  Customer and all persons  having or
claiming an interest in Customer or Customer's Accounts were parties.

         All  collections  of funds or other  property  paid or  distributed  in
respect  of  Securities  in the  Custody  Account  shall  be made at the risk of
Customer.  Bank shall have no liability for any loss  occasioned by delay in the
actual  receipt  of  notice  by Bank  or by its  Subcustodians  of any  payment,
redemption or other transaction  regarding  Securities in the Custody Account in
respect of which Bank has agreed to take any action hereunder.

8.       Corporate Actions; Tax Reclaims.

         (a) Corporate Actions.  Whenever Bank receives  information  concerning
the Securities  which requires  discretionary  action by the beneficial owner of
the Securities (other than a proxy), such as subscription  rights, bonus issues,
stock repurchase plans and rights offerings,  or legal notices or other material
intended to be transmitted to securities  holders  ("Corporate  Actions"),  Bank
shall give Customer  notice of such Corporate  Actions to the extent that Bank's
central corporate actions  department has actual knowledge of a Corporate Action
in time to notify its customers.

         When a rights  entitlement  or a fractional  interest  resulting from a
rights  issue,  stock  dividend,  stock  split or  similar  Corporate  Action is
received  which  bears  an  expiration  date,  Bank  shall  endeavor  to  obtain
Instructions  from Customer or its Authorized Person (as defined in Section 10),
but if Instructions are not received in time for Bank to take timely action,  or
actual  notice  of  such  Corporate   Action  was  received  too  late  to  seek
Instructions,  Bank is authorized to sell such rights  entitlement or fractional
interest  and to credit the Deposit  Account with the proceeds or take any other
action it reasonably  deems,  in good faith,  to be appropriate in which case it
shall be held harmless for any such action.


         (b)      Tax Reclaims.

                                       4


                  (i) Subject to the provisions  hereof,  Bank shall apply for a
         reduction  of  withholding  tax and any  refund  of any tax paid or tax
         credits  which  apply in each  applicable  market in  respect of income
         payments on Securities  for the benefit of Customer which Bank believes
         may be available to such Customer.

                  (ii)  The  provision  of  tax  reclaim  services  by  Bank  is
         conditional upon Bank receiving from the beneficial owner of Securities
         (A) a  declaration  of its  identity  and  place of  residence  and (B)
         certain  other  documentation  (pro forma copies of which are available
         from Bank).  Customer  acknowledges that, if Bank does not receive such
         declarations,  documentation and information, additional United Kingdom
         taxation  shall be  deducted  from all  income  received  in respect of
         Securities issued outside the United Kingdom and that U.S. non-resident
         alien tax or U.S.  backup  withholding  tax shall be deducted from U.S.
         source income.  Customer shall provide to Bank such  documentation  and
         information as it may require in connection with taxation, and warrants
         that, when given,  this information  shall be true and correct in every
         respect,   not   misleading  in  any  way,  and  contain  all  material
         information. Customer undertakes to notify Bank immediately if any such
         information requires updating or amendment.

                  (iii) Bank shall not be liable to  Customer or any third party
         for any taxes,  fines or  penalties  payable by Bank for the account of
         Customer or by Customer, and shall be indemnified accordingly,  whether
         these result from the inaccurate completion of documents by Customer or
         any third party, or as a result of the provision by Customer to Bank or
         any  third  party  of  inaccurate  or  misleading  information  or  the
         withholding  of  material  information  by  Customer or any other third
         party,  or as a result of any  delay of any  revenue  authority  or any
         other matter beyond the control of Bank.

                  (iv) Customer  confirms that Bank is authorized to deduct from
         any cash  received  or  credited  to the  Deposit  Account any taxes or
         levies required by any revenue or  governmental  authority for whatever
         reason in respect of the Securities or Cash Accounts.

                  (v) Bank shall perform tax reclaim  services only with respect
         to taxation levied by the revenue authorities of the countries notified
         to Customer from time to time and Bank may, by notification in writing,
         at its absolute  discretion,  supplement  or amend the markets in which
         the tax reclaim services are offered.  Other than as expressly provided
         in this sub-clause,  Bank shall have no  responsibility  with regard to
         Customer's tax position or status in any jurisdiction.

                  (vi) Customer confirms that Bank is authorized to disclose any
         information requested by any revenue authority or any governmental body
         in  relation  to  Customer  or the  Securities  and/or  Cash  held  for
         Customer.

                  (vii) Tax  reclaim  services  may be  provided  by Bank or, in
         whole or in part, by one or more third parties appointed by Bank (which
         may be Affiliates of Bank);  provided that Bank shall be liable for the
         performance  of any such third  party to the same  extent as Bank would
         have been if it performed such services itself.




9.       Nominees.

         Securities  which  are  ordinarily  held  in  registered  form  may  be
registered in a nominee name of Bank, Subcustodian or securities depository,  as
the case may be. Bank may without notice to Customer  cause any such  Securities
to cease to be  registered  in the name of any such nominee and to be registered
in the name of  Customer.  

                                       5


In the event that any  Securities  registered  in a nominee  name are called for
partial  redemption  by the  issuer,  Bank may allot the  called  portion to the
respective beneficial holders of such class of security in any manner Bank deems
to be fair  and  equitable.  IRC  shall  hold  Bank,  Subcustodians,  and  their
respective  nominees  harmless from any liability arising directly or indirectly
from their status as a mere record holder of Securities in the Custody Account.

10.      Authorized Persons.

         As used herein, the term "Authorized  Person" means employees or agents
including  investment  managers who have been  designated by written notice from
Customer or its designated  agent to act on behalf of Customer  hereunder.  Such
persons shall continue to be Authorized Persons until such time as Bank receives
Instructions  from  Customer or its  designated  agent that any such employee or
agent is no longer an Authorized Person.

11.      Instructions.

         The term  "Instructions"  means  instructions of any Authorized  Person
received by Bank, via telephone,  telex,  facsimile  transmission,  bank wire or
other  teleprocess  or  electronic   instruction  or  trade  information  system
acceptable  to Bank  which  Bank  believes  in good  faith to have been given by
Authorized   Persons  or  which  are   transmitted   with   proper   testing  or
authentication  pursuant to terms and conditions which Bank may specify.  Unless
otherwise expressly provided,  all Instructions shall continue in full force and
effect until canceled or superseded.

         Any  Instructions   delivered  to  Bank  by  telephone  shall  promptly
thereafter be confirmed in writing by an Authorized  Person (which  confirmation
may bear the facsimile  signature of such Person),  but Customer shall hold Bank
harmless for the failure of an Authorized  Person to send such  confirmation  in
writing,   the  failure  of  such  confirmation  to  conform  to  the  telephone
instructions  received or Bank's  failure to produce  such  confirmation  at any
subsequent  time.  Bank may  electronically  record  any  Instructions  given by
telephone,  and any other  telephone  discussions  with  respect to the  Custody
Account.   Customer  shall  be  responsible  for   safeguarding   any  testkeys,
identification  codes or other security  devices which Bank shall make available
to Customer or its Authorized Persons.

12.      Standard of Care; Liabilities.

         (a) Bank shall be responsible  for the  performance of only such duties
as are set  forth  herein  or  expressly  contained  in  Instructions  which are
consistent with the provisions hereof as follows:

                  (i)  Bank  shall  use  reasonable  care  with  respect  to its
         obligations  hereunder  and the  safekeeping  of Assets.  Bank shall be
         liable to Customer  for any loss which shall occur as the result of the
         failure of a Subcustodian  to exercise  reasonable care with respect to
         the  safekeeping  of such  Assets to the same extent that Bank would be
         liable to Customer if Bank were holding such Assets in New York. In the
         event of any loss to  Customer  by reason of the failure of Bank or its
         Subcustodian  to  utilize  reasonable  care,  Bank  shall be  liable to
         Customer  only  to the  extent  of  Customer's  direct  damages,  to be
         determined  based  on the  market  value of the  property  which is the
         subject of the loss at the date of  discovery  of such loss and without
         reference to any special  conditions or circumstances.  Bank shall have
         no liability  whatsoever for any  consequential,  special,  indirect or
         speculative  loss or  damages  (including,  but not  limited  to,  lost
         profits)  suffered  by  Customer in  connection  with the  transactions
         contemplated  hereby and the  relationship  established  hereby even if
         Bank has been advised as to the  possibility of the same and regardless
         of the  form of the  action.  Bank  shall  not be  responsible  for the
         insolvency  of any  Subcustodian  which is not a branch or Affiliate of
         Bank.

                                       6


                  (ii) Bank  shall  not be  responsible  for any act,  omission,
         default  or  the  solvency  of  any  broker  or  agent  which  it  or a
         Subcustodian  appoints unless such  appointment was made negligently or
         in bad faith.

                  (iii) Bank shall be indemnified by IRC, and without  liability
         to Customer for any action taken or omitted by Bank whether pursuant to
         Instructions  or  otherwise  within  the  scope  hereof  if such act or
         omission  was in good faith,  without  negligence.  In  performing  its
         obligations hereunder, Bank may rely on the genuineness of any document
         which  it  reasonably  believes  in good  faith  to have  been  validly
         executed.

                  (iv)  Customer  shall pay for and hold Bank  harmless from any
         liability or loss  resulting  from the  imposition or assessment of any
         taxes or other  governmental  charges not caused by the  negligence  of
         Bank, and any related expenses with respect to income from or Assets in
         the Accounts.

                  (v) Bank  shall be  entitled  to rely,  and may act,  upon the
         advice of counsel (who may be counsel for  Customer) on all matters and
         shall be without  liability for any action  reasonably taken or omitted
         pursuant to such advice.

                  (vi) Bank need not maintain any insurance specifically for the
         benefit of Customer.

                  (vii) Without limiting the foregoing, Bank shall not be liable
         for any loss which results  from: 1) the general risk of investing,  or
         2) investing or holding Assets in a particular country  including,  but
         not limited to, losses resulting from  malfunction,  interruption of or
         error in the  transmission  of  information  caused by any  machines or
         system or interruption of communication facilities,  abnormal operating
         conditions,   nationalization,   expropriation  or  other  governmental
         actions;  regulation  of the banking or securities  industry;  currency
         restrictions, devaluations or fluctuations; and market conditions which
         prevent the orderly execution of securities  transactions or affect the
         value of Assets.

                  (viii) No party  shall be liable to the other  parties for any
         loss due to forces  beyond its  control  including,  but not limited to
         strikes or work stoppages, acts of war (whether declared or undeclared)
         or terrorism,  insurrection,  revolution,  nuclear  fusion,  fission or
         radiation, or acts of God.

         (b) Consistent  with and without  limiting the first  paragraph of this
Section  12, it is  specifically  acknowledged  that Bank  shall have no duty or
responsibility to:

                  (i) question  Instructions which appear to Bank to contain all
         information   reasonably   necessary  for  Bank  to  act  or  make  any
         suggestions  to  Customer  or  an  Authorized   Person  regarding  such
         Instructions;

                  (ii)  supervise  or  make   recommendations  with  respect  to
         investments or the retention of Securities;

                  (iii) advise  Customer or an Authorized  Person  regarding any
         default in the payment of  principal  or income of any  security  other
         than as provided in Section 5(c) hereof;

                  (iv)  evaluate or report to Customer or an  Authorized  Person
         regarding the financial  condition of any broker,  agent or other party
         to which Securities are delivered or payments are made pursuant hereto;
         and

                                       7


                  (v) review or  reconcile  trade  confirmations  received  from
         brokers.  Customer or its Authorized Persons issuing Instructions shall
         bear  any   responsibility   to  review  such   confirmations   against
         Instructions issued to and statements issued by Bank.

         (c) Customer authorizes Bank to act hereunder notwithstanding that Bank
or any of its  divisions  or  Affiliates  may  have  a  material  interest  in a
transaction,  or circumstances are such that Bank may have a potential  conflict
of duty or interest  including the fact that Bank or any of its  Affiliates  may
provide brokerage  services to other customers,  act as financial advisor to the
issuer of Securities,  act as a lender to the issuer of  Securities,  act in the
same transaction as agent for more than one customer,  have a material  interest
in the issue of Securities,  or earn profits from any of the  activities  listed
herein.

13.      Fees and Expenses.

         IRC shall  pay Bank for its  services  hereunder  the fees set forth in
Schedule  B hereto  or such  other  amounts  as may be agreed  upon in  writing,
together with Bank's reasonable out-of-pocket or incidental expenses, including,
but not limited to, legal fees.  Bank shall have a lien on and is  authorized to
charge any Accounts of Customer for any amount owing to Bank under any provision
hereof.

14.      Miscellaneous.

         (a) Foreign Exchange Transactions.  To facilitate the administration of
Customer's  trading and  investment  activity,  Bank is authorized to enter into
spot or forward foreign exchange contracts with Customer or an Authorized Person
for Customer and may also provide  foreign  exchange  through its  subsidiaries,
Affiliates or Subcustodians.  Instructions, including standing instructions, may
be  issued  with  respect  to such  contracts  but Bank may  establish  rules or
limitations  concerning any foreign  exchange  facility made  available.  In all
cases where Bank, its  subsidiaries,  Affiliates or  Subcustodians  enter into a
foreign exchange  contract related to Accounts,  the terms and conditions of the
then current foreign  exchange  contract of Bank, its  subsidiary,  Affiliate or
Subcustodian and, to the extent not inconsistent,  this Agreement shall apply to
such transaction.


         (b)  Certification of Residency,  etc.  Customer and IRC each certifies
for itself that it is a resident of the United  States and shall  notify Bank of
any  changes  in  residency.  Bank  may  rely  upon  this  certification  or the
certification  of such  other  facts as may be  required  to  administer  Bank's
obligations hereunder. Customer and IRC shall indemnify Bank against all losses,
liability,   claims  or  demands  arising  directly  or  indirectly  from  their
respective certifications.

         (c) Access to Records.  Bank shall allow Customer's  independent public
accountant reasonable access to the records of Bank relating to the Assets as is
required in connection with their examination of books and records pertaining to
Customer's  affairs.  Subject to restrictions  under  applicable law, Bank shall
also obtain an undertaking to permit Customer's  independent  public accountants
reasonable  access  to  the  records  of any  Subcustodian  which  has  physical
possession of any Assets as may be required in connection  with the  examination
of Customer's books and records.

         (d) Governing  Law;  Successors  and Assigns,  Captions THIS  AGREEMENT
SHALL BE GOVERNED BY THE LAWS OF THE STATE OF NEW YORK  APPLICABLE TO AGREEMENTS
MADE AND TO BE PERFORMED IN NEW YORK and shall not be  assignable  by any party,
but shall  bind the  successors  in  interest  of  Customer,  IRC and Bank.  The
captions  given  to the  sections  and  subsections  of this  Agreement  are for
convenience  of  reference  only  and  are  not to be  used  to  interpret  this
Agreement.

                                       8


         (e) Entire Agreement;  Applicable Riders.  Customer represents that the
Assets deposited in the Accounts are (Check one):

         ---  Employee  Benefit  Plan or other  assets  subject to the  Employee
         Retirement Income Security Act of 1974, as amended ("ERISA");

         -X- Investment  Company  assets subject to certain U.S.  Securities and
         Exchange Commission rules and regulations;

         --- Neither of the above.

         This  Agreement  consists  exclusively  of this document  together with
         Schedules  A and B,  Exhibits I - -------  and the  following  Rider(s)
         [Check applicable rider(s)]:

         --- ERISA

         -X- INVESTMENT COMPANY

         --- PROXY VOTING

         -X- SPECIAL TERMS AND CONDITIONS

         There are no other provisions hereof and this Agreement  supersedes any
other  agreements,  whether written or oral,  between or among the parties.  Any
amendment hereto must be in writing, executed by the parties.

         (f)  Severability.  In the event that one or more provisions hereof are
held  invalid,  illegal  or  unenforceable  in any  respect  on the basis of any
particular  circumstances  or in any  jurisdiction,  the validity,  legality and
enforceability  of such provision or provisions under other  circumstances or in
other  jurisdictions  and of the  remaining  provisions  shall not in any way be
affected or impaired.

         (g) Waiver. Except as otherwise provided herein, no failure or delay on
the part of a party in  exercising  any power or right  hereunder  operates as a
waiver,  nor does any single or partial  exercise of any power or right preclude
any other or further  exercise,  or the exercise of any other power or right. No
waiver by a party of any provision  hereof,  or waiver of any breach or default,
is effective  unless in writing and signed by the party  against whom the waiver
is to be enforced.

         (h) Representations and Warranties.  (i) Customer hereby represents and
warrants  to Bank  that:  (A) it has full  authority  and power to  deposit  and
control  the  Securities  and cash  deposited  in the  Accounts;  (B) it has all
necessary  authority  to use Bank as its  custodian;  (C) this  Agreement is its
legal, valid and binding  obligation,  enforceable in accordance with its terms;
(D) it shall  have full  authority  and power to borrow  moneys  and enter  into
foreign exchange transactions;  and (E) it has not relied on any oral or written
representation  made by Bank or any person on its behalf,  and acknowledges that
this  Agreement  sets out to the  fullest  extent the duties of Bank.  (ii) Bank
hereby  represents  and warrants to Customer that: (A) it has the full authority
and power to perform its obligations hereunder, (B) this Agreement is its legal,
valid and binding obligation;  enforceable in accordance with its terms; and (C)
that it has taken all  necessary  action to authorize the execution and delivery
hereof.  (iii) IRC hereby  represents  and warrants to Bank that: (A) it has all
necessary   authority  to  furnish  the   indemnities   and  make  the  payments
contemplated  hereby;  (B)  this  Agreement  is its  legal,  valid  and  binding
obligation,  enforceable in accordance with its terms; and (C) it has not relied
on any oral or written  representation made by Bank or any person on its behalf,
and  acknowledges  that this Agreement sets out to the fullest extent the duties
of Bank.

                                       9


         (i) Notices.  All notices  hereunder  shall be effective  when actually
received.  Any notices or other  communications  which may be required hereunder
are to be sent by a party to the other  parties at the  following  addresses  or
such other addresses as may subsequently be given to the other party in writing:
(a) Bank: THE CHASE  MANHATTAN BANK, 4 Chase MetroTech  Center,  Brooklyn,  N.Y.
11245, Attention: Global Investor Services, Investment Management Group; and (b)
Customer: TWENTIETH CENTURY/BENHAM 4500 Main Street, Kansas City, MO 64105 Attn:
General Counsel (c) IRC: INVESTORS RESEARCH CORPORATION 4500 Main Street, Kansas
City, MO 64105 Attn: General Counsel

         (j)  Termination.  This Agreement may be terminated by a given Customer
with  respect  to it or Bank by giving  sixty  (60) days  written  notice to the
other,  provided that such notice to Bank shall specify the names of the persons
to whom Bank shall deliver the Assets in the Accounts.  If notice of termination
is given by Bank,  Customer shall,  within sixty (60) days following  receipt of
the notice, deliver to Bank Instructions  specifying the names of the persons to
whom Bank shall deliver the Assets. In either case Bank shall deliver the Assets
to the persons so  specified,  after  payment by IRC of any  amounts  which Bank
determines in good faith to be owed to it under Section 13. If within sixty (60)
days following receipt of a notice of termination by Bank, Bank does not receive
Instructions  from  Customer  specifying  the names of the  persons to whom Bank
shall deliver the Assets,  Bank,  at its  election,  may deliver the Assets to a
bank or trust  company  doing  business  in the State of New York to be held and
disposed of pursuant to the provisions hereof, or to Authorized  Persons, or may
continue to hold the Assets until Instructions are provided to Bank.

         (k)  Imputation  of  certain  information.   Bank  shall  not  be  held
responsible for and shall not be required to have regard to information  held by
any person by imputation or  information of which Bank is not aware by virtue of
a "Chinese Wall" arrangement.  If Bank becomes aware of confidential information
which in good faith it feels inhibits it from effecting a transaction  hereunder
Bank may elect to  refrain  from  effecting  it and Bank shall  promptly  notify
Customer of any such election.

                                       10
<PAGE>


         IN WITNESS WHEREOF,  the parties hereto have executed this Agreement as
of the date first-above written

                                           THE CHASE MANHATTAN BANK


                                           By: /s/ Kathleen Roeder
                                           Title:  Vice President
                                           Date: /s/ 1-9-97

                                           INVESTORS RESEARCH CORPORATION


                                           /s/ William M. Lyons
                                           By:  William M. Lyons
                                           Title: EVP and COO
                                           Date:

                           and, EACH OF THE FOLLOWING FUNDS INDIVIDUALLY:

                                    I - TWENTIETH CENTURY FUNDS:

                                           TWENTIETH CENTURY INVESTORS, INC.

                                           /s/ William M. Lyons
                                           By:  William M. Lyons
                                           Title:  EVP and COO
                                           Date:

                                           TWENTIETH CENTURY WORLD INVESTORS,
                                           INC.

                                           /s/ William M. Lyons
                                           By:  William M. Lyons
                                           Title:  EVP and COO
                                           Date:


                                           TCI PORTFOLIOS, INC.

                                           /s/ William M. Lyons
                                           By:  William M. Lyons
                                           Title:  EVP and COO
                                           Date:



                                       11
<PAGE>

 
                                           TWENTIETH CENTURY PREMIUM RESERVES,
                                           INC.
 
                                           /s/ William M. Lyons
                                           By:  William M. Lyons
                                           Title:  EVP and COO
                                           Date:
 
                                           TWENTIETH CENTURY CAPITAL PORTFOLIOS,
                                           INC.

                                           /s/ William M. Lyons
                                           By:  William M. Lyons
                                           Title:  EVP and COO
                                           Date:

                                           TWENTIETH CENTURY STRATEGIC ASSET
                                           ALLOCATIONS, INC.

                                           /s/ William M. Lyons
                                           By:  William M. Lyons
                                           Title:  EVP and COO
                                           Date:

                                           TWENTIETH CENTURY INSTITUTIONAL
                                           GROWTH TRUST

                                           /s/ William M. Lyons
                                           By:  William M. Lyons
                                           Title:  EVP and COO
                                           Date:


                           and

                                    II - THE BENHAM FUNDS:

                                           BENHAM EQUITY FUNDS

                                           /s/ Douglas A. Paul
                                           By:  Douglas A. Paul
                                           Title:  Secretary & General Counsel
                                           Date:

                                       12
<PAGE>

                                           BENHAM MANAGER FUNDS

                                           /s/ Douglas A. Paul
                                           By:  Douglas A. Paul
                                           Title:  Secretary & General Counsel
                                           Date:

                                           BENHAM TARGET MATURITIES TRUST

                                           /s/ Douglas A. Paul
                                           By:  Douglas A. Paul
                                           Title:  Secretary & General Counsel
                                           Date:

                                           CAPITAL PRESERVATION FUND, INC.

                                           /s/ Douglas A. Paul
                                           By:  Douglas A. Paul
                                           Title:  Secretary & General Counsel
                                           Date:


                                           CAPITAL PRESERVATION FUND II, INC.

                                           /s/ Douglas A. Paul
                                           By:  Douglas A. Paul
                                           Title:  Secretary & General Counsel
                                           Date:


                                           BENHAM GOVERNMENT INCOME TRUST

                                           /s/ Douglas A. Paul
                                           By:  Douglas A. Paul
                                           Title:  Secretary & General Counsel
                                           Date:

                                           BENHAM INVESTMENT TRUST

                                           /s/ Douglas A. Paul
                                           By:  Douglas A. Paul
                                           Title:  Secretary & General Counsel
                                           Date:


                                       13
<PAGE>


                                           BENHAM MUNICIPAL TRUST

                                           /s/ Douglas A. Paul
                                           By:  Douglas A. Paul
                                           Title:  Secretary & General Counsel
                                           Date:


                                           BENHAM CALIFORNIA TAX-FREE AND
                                           MUNICIPAL FUNDS

                                           /s/ Douglas A. Paul
                                           By:  Douglas A. Paul
                                           Title:  Secretary & General Counsel
                                           Date:


                                           BENHAM INTERNATIONAL FUNDS

                                           /s/ Douglas A. Paul
                                           By:  Douglas A. Paul
                                           Title:  Secretary & General Counsel
                                           Date:


                                                                           83392

                                       14
<PAGE>



              Investment Company Rider to Global Custody Agreement

            among THE CHASE MANHATTAN BANK, TWENTIETH CENTURY/BENHAM

                       and INVESTORS RESEARCH CORPORATION

                            effective August 9, 1996

         Customer  represents that the Assets being placed in Bank's custody are
subject to the Investment  Company Act of 1940, as amended (the "1940 Act"),  as
the same may be amended from time to time.

         Except to the extent that Bank has specifically agreed to comply with a
condition  of a rule,  regulation,  interpretation  promulgated  by or under the
authority of the  Securities  and Exchange  Commission  ("SEC") or the Exemptive
Order  applicable to accounts of this nature  issued to Bank (1940 Act,  Release
No.  12053,  November  20,  1981),  as  amended,  or unless  Bank has  otherwise
specifically  agreed,  Customer  shall be solely  responsible to assure that the
maintenance  of  Assets  hereunder   complies  with  such  rules,   regulations,
interpretations  or exemptive order promulgated by or under the authority of the
Securities Exchange Commission.

         The following modifications are made to the Agreement:

         Section 3.    Subcustodians and Securities Depositories.

         Add the following language to the end of Section 3:

         The terms Subcustodian and securities depositories as used herein shall
         mean a branch of a qualified U.S. bank, an eligible  foreign  custodian
         or an eligible foreign securities depository, which are further defined
         as follows:

         (a)  "qualified  U.S. Bank" shall mean a qualified U.S. bank as defined
         in Rule 17f-5 under the 1940 Act;

         (b) "eligible foreign  custodian" shall mean (i) a banking  institution
         or trust company, incorporated or organized under the laws of a country
         other  than  the  United  States,  that  is  regulated  as such by that
         country's  government or an agency  thereof and that has  shareholders'
         equity  in  excess  of $200  million  in U.S.  currency  (or a  foreign
         currency  equivalent  thereof)  as of the close of its fiscal year most
         recently  completed  prior to the date  hereof,  (ii) a majority  owned
         direct or indirect  subsidiary of a qualified U.S. bank or bank holding
         company that is  incorporated  or organized under the laws of a country
         other  than the  United  States  and that has  shareholders'  equity in
         excess  of  $100  million  in  U.S.  currency  (or a  foreign  currency
         equivalent  thereof) as of the close of its fiscal  year most  recently
         completed  prior to the date  hereof,  (iii) a banking  institution  or
         trust  company  incorporated  or organized  under the laws of a country
         other than the United  States or a majority  owned  direct or  indirect
         subsidiary  of a qualified  U.S.  bank or bank holding  company that is
         incorporated  or organized  under the laws of a country  other than the
         United States which has such other qualifications as shall be specified
         in  Instructions  and  approved by Bank;  or (iv) any other entity that
         shall  have  been so  qualified  by  exemptive  order,  rule  or  other
         appropriate action of the SEC; and

         (c) "eligible  foreign  securities  depository" shall mean a securities
         depository or clearing agency, incorporated or organized under the laws
         of a country  other  than the United  States,  which  operates  (i) the
         central system for handling  securities or equivalent  book-entries  in
         that country,  or (ii) a transnational  system for the central handling
         of securities or equivalent book-entries.

                                       1


         Customer  represents  that its Board of Directors  has approved each of
the  Subcustodians  listed in Schedule A hereto and the terms of the  subcustody
agreements between Bank and each Subcustodian,  which are attached as Exhibits I
through of Schedule A, and further represents that its Board has determined that
the use of each  Subcustodian  and the terms of each  subcustody  agreement  are
consistent with the best interests of the Fund(s) and its (their)  shareholders.
Bank shall  supply  Customer  with any  amendment  to  Schedule A for  approval.
Customer has supplied or shall supply Bank with certified copies of its Board of
Directors  resolution(s)  with respect to the foregoing  prior to placing Assets
with any Subcustodian so approved.

         Section 11.    Instructions.

         Add the following language to the end of Section 11:

         Deposit Account Payments and Custody Account Transactions made pursuant
         to  Section  5 and 6 hereof  may be made only for the  purposes  listed
         below.  Instructions must specify the purpose for which any transaction
         is to be made and Customer  shall be solely  responsible to assure that
         Instructions  are  in  accord  with  any  limitations  or  restrictions
         applicable to Customer by law or as may be set forth in its prospectus.

         (a) In connection  with the purchase or sale of Securities at prices as
         confirmed by Instructions;

         (b) When  Securities  are called,  redeemed or  retired,  or  otherwise
         become payable;

         (c) In exchange for or upon conversion into other  securities  alone or
         other   securities   and  cash   pursuant   to  any  plan  or   merger,
         consolidation, reorganization, recapitalization or readjustment;

         (d) Upon  conversion of  Securities  pursuant to their terms into other
         securities;

         (e) Upon exercise of  subscription,  purchase or other  similar  rights
         represented by Securities;

         (f) For the payment of interest, taxes, management or supervisory fees,
         distributions or operating expenses;

         (g) In connection with any borrowings by Customer requiring a pledge of
         Securities, but only against receipt of amounts borrowed;

         (h) In connection with any loans,  but only against receipt of adequate
         collateral  as  specified  in  Instructions  which  shall  reflect  any
         restrictions applicable to Customer;

         (i) For the  purpose  of  redeeming  shares  of the  capital  stock  of
         Customer and the delivery to, or the crediting to the account of, Bank,
         its  Subcustodian  or  Customer's  transfer  agent,  such  shares to be
         purchased or redeemed;

         (j) For the purpose of  redeeming  in kind  shares of Customer  against
         delivery to Bank, its Subcustodian or Customer's transfer agent of such
         shares to be so redeemed;

         (k) For delivery in  accordance  with the  provisions  of any agreement
         among  Customer,   Bank  and  a  broker-dealer   registered  under  the
         Securities   Exchange  Act  of  1934  and  a  member  of  The  National
         Association of Securities  Dealers,  Inc.,  relating to compliance with
         the rules of The Options  Clearing

                                       2


         Corporation and of any registered national securities  exchange,  or of
         any similar  organization or  organizations,  regarding escrow or other
         arrangements in connection with transactions by Customer;

         (l) For release of Securities to designated  brokers under covered call
         options, provided, however, that such Securities shall be released only
         upon  payment to Bank of monies for the  premium  due and a receipt for
         the  Securities  which are to be held in escrow.  Upon  exercise of the
         option,  or  at  expiration,   Bank  shall  receive  from  brokers  the
         Securities previously deposited.  Bank shall act strictly in accordance
         with  Instructions  in the delivery of  Securities to be held in escrow
         and shall have no  responsibility  or liability for any such Securities
         which are not  returned  promptly  when due other  than to make  proper
         request for such return;

         (m) For spot or forward  foreign  exchange  transactions  to facilitate
         security  trading,   receipt  of  income  from  Securities  or  related
         transactions;

         (n) For other  proper  purposes  as may be  specified  in  Instructions
         issued by an officer of Customer which shall include a statement of the
         purpose for which the delivery or payment is to be made,  the amount of
         the payment or specific  Securities  to be  delivered,  the name of the
         person or persons  to whom  delivery  or  payment is to be made,  and a
         certification   that  the  purpose  is  a  proper   purpose  under  the
         instruments governing Customer; and

         (o)  Upon the termination hereof as set forth in Section 14(j).

         Section 12.    Standard of Care; Liabilities.

         Add the following at the end of Section as 12:

         (d) Bank hereby  warrants to Customer  that in its  opinion,  after due
         inquiry,  the  established  procedures  to be  followed  by each of its
         branches,  each branch of a qualified U.S. Bank, each eligible  foreign
         custodian  and each  eligible  foreign  securities  depository  holding
         Customer's  Securities  pursuant  hereto  afford  protection  for  such
         Securities  at  least  equal to that  afforded  by  Bank's  established
         procedures  with  respect  to similar  securities  held by Bank and its
         securities depositories in New York.

         Section 14.    Access to Records.

         Add the following language to the end of Section 14(c):

         Upon reasonable request from Customer, Bank shall furnish Customer such
         reports (or portions  thereof) of Bank's system of internal  accounting
         controls applicable to Bank's duties hereunder.  Bank shall endeavor to
         obtain  and  furnish  Customer  with  such  similar  reports  as it may
         reasonably  request with respect to each  Subcustodian  and  securities
         depository holding Assets.


                                       3
<PAGE>

                               DOMESTIC AND GLOBAL

                       SPECIAL TERMS AND CONDITIONS RIDER


Domestic Corporate Actions and Proxies

With respect to domestic  U.S. and  Canadian  Securities  (the latter if held in
DTC), the following  provisions shall apply rather than the pertinent provisions
of Section 8 of the Agreement and the Global Proxy Service rider:

         Bank  shall send to  Customer  or the  Authorized  Person for a Custody
         Account, such proxies (signed in blank, if issued in the name of Bank's
         nominee or the nominee of a central depository) and communications with
         respect  to  Securities  in the  Custody  Account as call for voting or
         relate to legal  proceedings  within a reasonable time after sufficient
         copies  are  received  by Bank  for  forwarding  to its  customers.  In
         addition, Bank shall follow coupon payments, redemptions,  exchanges or
         similar  matters with respect to Securities in the Custody  Account and
         advise  Customer or the  Authorized  Person for such  Account of rights
         issued, tender offers or any other discretionary rights with respect to
         such  Securities,  in each case, of which Bank has received notice from
         the issuer of the  Securities,  or as to which  notice is  published in
         publications routinely utilized by Bank for this purpose.


                                       4




February 7, 1997



American Century Government Income Trust
4500 Main Street
Kansas City, MO  64111

Dear Sirs:

As counsel for the American Century Government Income Trust (the "Trust"),  I am
familiar with the Trust's  registration under the Investment Company Act of 1940
and with the registration statement relating to its Common Shares (the "Shares")
under  the  Securities  Act  of  1933  (File  No.  2-99222)  (the  "Registration
Statement").  I have also examined  such other  corporate  records,  agreements,
documents  and  instruments  as I  deemed  appropriate  in  connection  with the
establishment   of  a  new   series  of  the  Trust,   American   Century-Benham
Inflation-Adjusted Treasury Fund (the "Fund") .

Based upon the  foregoing,  it is my  opinion  that the Shares to be sold at the
public offering price and delivered by the Fund against receipt of the net asset
value of the Shares in compliance with the terms of the  Registration  Statement
and the  requirements  of applicable  law, will be, when sold,  duly and validly
authorized, and fully paid and non-assessable.

I consent to the filing of this opinion in  connection  with the  Post-Effective
Amendment Number 31 to the Trust's  Registration  Statement under the Securities
Act of 1933 and  Investment  Company Act of 1940 to be filed with respect to the
Fund with the Securities and Exchange Commission.

Very truly yours,

/s/ Douglas A. Paul

Douglas A. Paul
Vice President, Secretary
 and General Counsel




                         Consent of Independent Auditors




The Board of Trustees and Shareholders
American Century Government Income Trust:

We consent to the  inclusion  in  American  Century  Government  Income  Trust's
Post-Effective  Amendment No. 31 to the  Registration  Statement No.  2-99222 on
Form  N-1A  under  the  Securities  Act of  1933  and  Amendment  No.  32 to the
Registration  Statement  No.  811-4363  filed on Form N-1A under the  Investment
Company Act of 1940 of our reports dated May 3, 1996 on the financial statements
and financial  highlights  of the American  Century-Benham  Short-Term  Treasury
Fund,  American   Century-Benham   Intermediate-Term   Treasury  Fund,  American
Century-Benham  Long-Term  Treasury  Fund,  American  Century-Benham  GNMA Fund,
American  Century-Benham  Adjustable Rate Government  Securities Fund,  American
Century-Benham  Government Agency Money Market Fund and American  Century-Benham
Inflation-Adjusted  Treasury Fund (the seven funds  comprising  American Century
Government Income Trust) for the periods indicated  therein,  which reports have
been  incorporated by reference into the Statement of Additional  Information of
American  Century  Government  Income Trust. We also consent to the reference to
our firm under the heading  "Financial  Highlights"  in the Prospectus and under
the heading "About the Trust" in the Statement of Additional  Information  which
is incorporated by reference in the Prospectus.


/s/KPMG Peat Marwick LLP

KPMG Peat Marwick LLP
Kansas City, Missouri
February 5, 1997


<TABLE> <S> <C>

<ARTICLE> 6
<SERIES>
   <NUMBER> 1
   <NAME> AMERICAN CENTURY - BENHAM GNMA FUND
       
<S>                      <C>
<PERIOD-TYPE>     6-mos
<FISCAL-YEAR-END> MAR-31-1996
<PERIOD-END>      SEP-30-1996
<INVESTMENTS-AT-COST>      1,129,431,463
<INVESTMENTS-AT-VALUE>     1,124,075,837
<RECEIVABLES>     7,617,323
<ASSETS-OTHER>    3,444,054
<OTHER-ITEMS-ASSETS>       0
<TOTAL-ASSETS>    1,135,137,214
<PAYABLE-FOR-SECURITIES>   11,400,238
<SENIOR-LONG-TERM-DEBT>    0
<OTHER-ITEMS-LIABILITIES>  5,466,751
<TOTAL-LIABILITIES>        16,866,989
<SENIOR-EQUITY>   0
<PAID-IN-CAPITAL-COMMON>   1,151,255,414
<SHARES-COMMON-STOCK>      108,106,970
<SHARES-COMMON-PRIOR>      107,220,778
<ACCUMULATED-NII-CURRENT>  25,484
<OVERDISTRIBUTION-NII>     0
<ACCUMULATED-NET-GAINS>    (27,655,047)
<OVERDISTRIBUTION-GAINS>   0
<ACCUM-APPREC-OR-DEPREC>   (5,355,626)
<NET-ASSETS>      1,118,270,225
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 41,156,984
<OTHER-INCOME>    0
<EXPENSES-NET>    3,028,759
<NET-INVESTMENT-INCOME>    38,128,225
<REALIZED-GAINS-CURRENT>   (3,946,624)
<APPREC-INCREASE-CURRENT>  (6,955,903)
<NET-CHANGE-FROM-OPS>      27,225,698
<EQUALIZATION>    0
<DISTRIBUTIONS-OF-INCOME>  38,085,694
<DISTRIBUTIONS-OF-GAINS>   0
<DISTRIBUTIONS-OTHER>      0
<NUMBER-OF-SHARES-SOLD>    14,611,713
<NUMBER-OF-SHARES-REDEEMED>         16,555,822
<SHARES-REINVESTED>        2,830,301
<NET-CHANGE-IN-ASSETS>     (1,749,011)
<ACCUMULATED-NII-PRIOR>    0
<ACCUMULATED-GAINS-PRIOR>  0
<OVERDISTRIB-NII-PRIOR>    0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES>      1,538,387
<INTEREST-EXPENSE>         0
<GROSS-EXPENSE>   3,082,604
<AVERAGE-NET-ASSETS>       1,103,449,105
<PER-SHARE-NAV-BEGIN>      10.45
<PER-SHARE-NII>   0.36
<PER-SHARE-GAIN-APPREC>    20.37
<PER-SHARE-DIVIDEND>       0.36
<PER-SHARE-DISTRIBUTIONS>  0.00
<RETURNS-OF-CAPITAL>       0.00
<PER-SHARE-NAV-END>        10.34
<EXPENSE-RATIO>   0.56
<AVG-DEBT-OUTSTANDING>        0
<AVG-DEBT-PER-SHARE>       0.00
        

</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<SERIES>
   <NUMBER> 2
   <NAME> AMERICAN CENTURY - BENHAM INTERMEDIATE-TERM TREASURY FUND
       
<S>                      <C>
<PERIOD-TYPE>     6-mos
<FISCAL-YEAR-END> MAR-31-1996
<PERIOD-END>      SEP-30-1996
<INVESTMENTS-AT-COST>      303,621,958
<INVESTMENTS-AT-VALUE>     301,977,425
<RECEIVABLES>     4,201,175
<ASSETS-OTHER>    282,513
<OTHER-ITEMS-ASSETS>       0
<TOTAL-ASSETS>    306,461,113
<PAYABLE-FOR-SECURITIES>   0
<SENIOR-LONG-TERM-DEBT>    0
<OTHER-ITEMS-LIABILITIES>  1,262,091
<TOTAL-LIABILITIES>        1,262,091
<SENIOR-EQUITY>   0
<PAID-IN-CAPITAL-COMMON>   314,282,121
<SHARES-COMMON-STOCK>      29,954,516
<SHARES-COMMON-PRIOR>      30,370,621
<ACCUMULATED-NII-CURRENT>  0
<OVERDISTRIBUTION-NII>     0
<ACCUMULATED-NET-GAINS>    (7,440,824)
<OVERDISTRIBUTION-GAINS>   0
<ACCUM-APPREC-OR-DEPREC>   (1,644,533)
<NET-ASSETS>      305,199,022
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 9,332,594
<OTHER-INCOME>    0
<EXPENSES-NET>    782,665
<NET-INVESTMENT-INCOME>    8,549,929
<REALIZED-GAINS-CURRENT>   76,129
<APPREC-INCREASE-CURRENT>  (1,670,477)
<NET-CHANGE-FROM-OPS>      6,955,581
<EQUALIZATION>    0
<DISTRIBUTIONS-OF-INCOME>  8,546,608
<DISTRIBUTIONS-OF-GAINS>   0
<DISTRIBUTIONS-OTHER>      0
<NUMBER-OF-SHARES-SOLD>    3,319,706
<NUMBER-OF-SHARES-REDEEMED>         4,434,457
<SHARES-REINVESTED>        698,646
<NET-CHANGE-IN-ASSETS>     (5,820,892)
<ACCUMULATED-NII-PRIOR>    0
<ACCUMULATED-GAINS-PRIOR>  0
<OVERDISTRIB-NII-PRIOR>    0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES>      418,667
<INTEREST-EXPENSE>         0
<GROSS-EXPENSE>   792,508
<AVERAGE-NET-ASSETS>       294,852,171
<PER-SHARE-NAV-BEGIN>      10.24
<PER-SHARE-NII>   0.29
<PER-SHARE-GAIN-APPREC>    204.75
<PER-SHARE-DIVIDEND>       0.29
<PER-SHARE-DISTRIBUTIONS>  0.00
<RETURNS-OF-CAPITAL>       0.00
<PER-SHARE-NAV-END>        10.19
<EXPENSE-RATIO>   0.54
<AVG-DEBT-OUTSTANDING>        0
<AVG-DEBT-PER-SHARE>       0.00
        

</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<SERIES>
   <NUMBER> 3
   <NAME> AMERICAN CENTURY - BENHAM GOVERNMENT AGENCY MONEY MARKET
       
<S>                      <C>
<PERIOD-TYPE>     6-mos
<FISCAL-YEAR-END> MAR-31-1996
<PERIOD-END>      SEP-30-1996
<INVESTMENTS-AT-COST>      479,110,026
<INVESTMENTS-AT-VALUE>     479,110,026
<RECEIVABLES>     1,698,812
<ASSETS-OTHER>    4,454,742
<OTHER-ITEMS-ASSETS>       0
<TOTAL-ASSETS>    485,263,580
<PAYABLE-FOR-SECURITIES>   0
<SENIOR-LONG-TERM-DEBT>    0
<OTHER-ITEMS-LIABILITIES>  2,598,343
<TOTAL-LIABILITIES>        2,598,343
<SENIOR-EQUITY>   0
<PAID-IN-CAPITAL-COMMON>   482,665,237
<SHARES-COMMON-STOCK>      482,665,237
<SHARES-COMMON-PRIOR>      503,328,283
<ACCUMULATED-NII-CURRENT>  0
<OVERDISTRIBUTION-NII>     0
<ACCUMULATED-NET-GAINS>    0
<OVERDISTRIBUTION-GAINS>   0
<ACCUM-APPREC-OR-DEPREC>   0
<NET-ASSETS>      482,665,237
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 13,034,042
<OTHER-INCOME>    0
<EXPENSES-NET>    1,387,579
<NET-INVESTMENT-INCOME>    11,646,463
<REALIZED-GAINS-CURRENT>   0
<APPREC-INCREASE-CURRENT>  0
<NET-CHANGE-FROM-OPS>      11,646,463
<EQUALIZATION>    0
<DISTRIBUTIONS-OF-INCOME>  11,720,259
<DISTRIBUTIONS-OF-GAINS>   0
<DISTRIBUTIONS-OTHER>      0
<NUMBER-OF-SHARES-SOLD>    201,154,449
<NUMBER-OF-SHARES-REDEEMED>         233,188,696
<SHARES-REINVESTED>        11,371,201
<NET-CHANGE-IN-ASSETS>     (20,663,046)
<ACCUMULATED-NII-PRIOR>    0
<ACCUMULATED-GAINS-PRIOR>  0
<OVERDISTRIB-NII-PRIOR>    0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES>      682,603
<INTEREST-EXPENSE>         0
<GROSS-EXPENSE>   1,350,681
<AVERAGE-NET-ASSETS>       489,991,314
<PER-SHARE-NAV-BEGIN>      1.00
<PER-SHARE-NII>   0.02
<PER-SHARE-GAIN-APPREC>    0.00
<PER-SHARE-DIVIDEND>       0.02
<PER-SHARE-DISTRIBUTIONS>  0.00
<RETURNS-OF-CAPITAL>       0.00
<PER-SHARE-NAV-END>        1.00
<EXPENSE-RATIO>   0.57
<AVG-DEBT-OUTSTANDING>        0
<AVG-DEBT-PER-SHARE>       0.00
        

</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<SERIES>
   <NUMBER> 4
   <NAME> AMERICAN CENTURY - BENHAM ADJUSTABLE RATE GOV'T SECURITIES
       
<S>                      <C>
<PERIOD-TYPE>     6-mos
<FISCAL-YEAR-END> MAR-31-1996
<PERIOD-END>      SEP-30-1996
<INVESTMENTS-AT-COST>      259,472,149
<INVESTMENTS-AT-VALUE>     259,292,403
<RECEIVABLES>     3,151,791
<ASSETS-OTHER>    454,322
<OTHER-ITEMS-ASSETS>       0
<TOTAL-ASSETS>    262,898,516
<PAYABLE-FOR-SECURITIES>   0
<SENIOR-LONG-TERM-DEBT>    0
<OTHER-ITEMS-LIABILITIES>  1,564,711
<TOTAL-LIABILITIES>        1,564,711
<SENIOR-EQUITY>   0
<PAID-IN-CAPITAL-COMMON>   330,836,487
<SHARES-COMMON-STOCK>      27,527,436
<SHARES-COMMON-PRIOR>      31,524,695
<ACCUMULATED-NII-CURRENT>  8,277
<OVERDISTRIBUTION-NII>     0
<ACCUMULATED-NET-GAINS>    (69,331,213)
<OVERDISTRIBUTION-GAINS>   0
<ACCUM-APPREC-OR-DEPREC>   (179,746)
<NET-ASSETS>      261,333,805
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 8,367,847
<OTHER-INCOME>    0
<EXPENSES-NET>    805,752
<NET-INVESTMENT-INCOME>    7,562,095
<REALIZED-GAINS-CURRENT>   (105,394)
<APPREC-INCREASE-CURRENT>  732,533
<NET-CHANGE-FROM-OPS>      8,189,234
<EQUALIZATION>    0
<DISTRIBUTIONS-OF-INCOME>  7,537,843
<DISTRIBUTIONS-OF-GAINS>   0
<DISTRIBUTIONS-OTHER>      0
<NUMBER-OF-SHARES-SOLD>    4,787,774
<NUMBER-OF-SHARES-REDEEMED>         9,434,835
<SHARES-REINVESTED>        649,802
<NET-CHANGE-IN-ASSETS>     (37,204,270)
<ACCUMULATED-NII-PRIOR>    0
<ACCUMULATED-GAINS-PRIOR>  0
<OVERDISTRIB-NII-PRIOR>    0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES>      384,643
<INTEREST-EXPENSE>         0
<GROSS-EXPENSE>   830,026
<AVERAGE-NET-ASSETS>       277,053,328
<PER-SHARE-NAV-BEGIN>      9.47
<PER-SHARE-NII>   0.26
<PER-SHARE-GAIN-APPREC>    0.02
<PER-SHARE-DIVIDEND>       0.26
<PER-SHARE-DISTRIBUTIONS>  0.00
<RETURNS-OF-CAPITAL>       0.00
<PER-SHARE-NAV-END>        9.49
<EXPENSE-RATIO>   0.60
<AVG-DEBT-OUTSTANDING>        0
<AVG-DEBT-PER-SHARE>       0.00
        

</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<SERIES>
   <NUMBER> 5
   <NAME> AMERICAN CENTURY - BENHAM SHORT-TERM TREASURY FUND
       
<S>                      <C>
<PERIOD-TYPE>     6-mos
<FISCAL-YEAR-END> MAR-31-1996
<PERIOD-END>      SEP-30-1996
<INVESTMENTS-AT-COST>      34,310,929
<INVESTMENTS-AT-VALUE>     34,216,599
<RECEIVABLES>     352,237
<ASSETS-OTHER>    356,888
<OTHER-ITEMS-ASSETS>       0
<TOTAL-ASSETS>    34,925,724
<PAYABLE-FOR-SECURITIES>   0
<SENIOR-LONG-TERM-DEBT>    0
<OTHER-ITEMS-LIABILITIES>  114,992
<TOTAL-LIABILITIES>        114,992
<SENIOR-EQUITY>   0
<PAID-IN-CAPITAL-COMMON>   34,833,088
<SHARES-COMMON-STOCK>      3,552,807
<SHARES-COMMON-PRIOR>      3,624,307
<ACCUMULATED-NII-CURRENT>  0
<OVERDISTRIBUTION-NII>     0
<ACCUMULATED-NET-GAINS>    71,974
<OVERDISTRIBUTION-GAINS>   0
<ACCUM-APPREC-OR-DEPREC>   (94,330)
<NET-ASSETS>      34,810,732
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 1,012,231
<OTHER-INCOME>    0
<EXPENSES-NET>    108,008
<NET-INVESTMENT-INCOME>    904,223
<REALIZED-GAINS-CURRENT>   (237,323)
<APPREC-INCREASE-CURRENT>  90,667
<NET-CHANGE-FROM-OPS>      757,567
<EQUALIZATION>    0
<DISTRIBUTIONS-OF-INCOME>  904,223
<DISTRIBUTIONS-OF-GAINS>   0
<DISTRIBUTIONS-OTHER>      0
<NUMBER-OF-SHARES-SOLD>    857,413
<NUMBER-OF-SHARES-REDEEMED>         999,989
<SHARES-REINVESTED>        71,075
<NET-CHANGE-IN-ASSETS>     (837,440)
<ACCUMULATED-NII-PRIOR>    0
<ACCUMULATED-GAINS-PRIOR>  0
<OVERDISTRIB-NII-PRIOR>    0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES>      48,212
<INTEREST-EXPENSE>         0
<GROSS-EXPENSE>   131,727
<AVERAGE-NET-ASSETS>       34,791,468
<PER-SHARE-NAV-BEGIN>      9.84
<PER-SHARE-NII>   0.25
<PER-SHARE-GAIN-APPREC>    20.44
<PER-SHARE-DIVIDEND>       0.25
<PER-SHARE-DISTRIBUTIONS>  0.00
<RETURNS-OF-CAPITAL>       0.00
<PER-SHARE-NAV-END>        9.80
<EXPENSE-RATIO>   0.63
<AVG-DEBT-OUTSTANDING>        0
<AVG-DEBT-PER-SHARE>       0.00
        

</TABLE>

<TABLE> <S> <C>
 
<ARTICLE> 6
<SERIES>
   <NUMBER> 6
   <NAME> AMERICAN CENTURY - BENHAM LONG-TERM TREASURY FUND
       
<S>                      <C>
<PERIOD-TYPE>     6-mos
<FISCAL-YEAR-END> MAR-31-1996
<PERIOD-END>      SEP-30-1996
<INVESTMENTS-AT-COST>      129,610,913
<INVESTMENTS-AT-VALUE>     128,554,193
<RECEIVABLES>     1,939,522
<ASSETS-OTHER>    63,072
<OTHER-ITEMS-ASSETS>       0
<TOTAL-ASSETS>    130,556,787
<PAYABLE-FOR-SECURITIES>   0
<SENIOR-LONG-TERM-DEBT>    0
<OTHER-ITEMS-LIABILITIES>  478,449
<TOTAL-LIABILITIES>        478,449
<SENIOR-EQUITY>   0
<PAID-IN-CAPITAL-COMMON>   132,949,624
<SHARES-COMMON-STOCK>      13,717,916
<SHARES-COMMON-PRIOR>      11,450,121
<ACCUMULATED-NII-CURRENT>  0
<OVERDISTRIBUTION-NII>     0
<ACCUMULATED-NET-GAINS>    (1,814,566)
<OVERDISTRIBUTION-GAINS>   0
<ACCUM-APPREC-OR-DEPREC>   (1,056,720)
<NET-ASSETS>      130,078,338
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 4,118,817
<OTHER-INCOME>    0
<EXPENSES-NET>    360,418
<NET-INVESTMENT-INCOME>    3,758,399
<REALIZED-GAINS-CURRENT>   (858,832)
<APPREC-INCREASE-CURRENT>  (1,286,898)
<NET-CHANGE-FROM-OPS>      1,635,669
<EQUALIZATION>    0
<DISTRIBUTIONS-OF-INCOME>  3,758,399
<DISTRIBUTIONS-OF-GAINS>   0
<DISTRIBUTIONS-OTHER>      0
<NUMBER-OF-SHARES-SOLD>    5,368,234
<NUMBER-OF-SHARES-REDEEMED>         3,457,854
<SHARES-REINVESTED>        357,415
<NET-CHANGE-IN-ASSETS>     19,337,430
<ACCUMULATED-NII-PRIOR>    0
<ACCUMULATED-GAINS-PRIOR>  0
<OVERDISTRIB-NII-PRIOR>    0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES>      160,287
<INTEREST-EXPENSE>         0
<GROSS-EXPENSE>   362,124
<AVERAGE-NET-ASSETS>       116,914,620
<PER-SHARE-NAV-BEGIN>      9.67
<PER-SHARE-NII>   0.30
<PER-SHARE-GAIN-APPREC>    20.29
<PER-SHARE-DIVIDEND>       0.30
<PER-SHARE-DISTRIBUTIONS>  0.00
<RETURNS-OF-CAPITAL>       0.00
<PER-SHARE-NAV-END>        9.48
<EXPENSE-RATIO>   0.63
<AVG-DEBT-OUTSTANDING>        0
<AVG-DEBT-PER-SHARE>       0.00
        

</TABLE>


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