AMERICAN CENTURY MUTUAL FUNDS INC
485APOS, 1997-07-17
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   As filed with the Securities and Exchange Commission on July 17, 1997
             1933 Act File No. 2-14213; 1940 Act File No. 811-0816
- --------------------------------------------------------------------------------

                             SECURITIES AND EXCHANGE COMMISSION
                              Washington, DC 20549

                                    FORM N-1A

REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933              _X__

         Pre-Effective Amendment No.____                             ____

         Post-Effective Amendment No._77_                            _X__

                                     and/or

REGISTRATION STATEMENT UNDER THE INVESTMENT COMPANY ACT OF 1940      _X__

         Amendment No._77_

                       (check appropriate box or boxes.)

                       AMERICAN CENTURY MUTUAL FUNDS, INC.
               ---------------------------------------------------
               (Exact Name of Registrant as Specified in Charter)

        American Century Tower, 4500 Main Street, Kansas City, MO 64111
        ----------------------------------------------------------------
        (Address of Principal Executive Offices)               (Zip Code)


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

                             James E. Stowers III
        American Century Tower, 4500 Main Street, Kansas City, MO 64111
        ----------------------------------------------------------------
                    (Name and address of Agent for service)

         Approximate Date of Proposed Public Offering: October 1, 1997

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

_____  immediately  upon  filing  pursuant to  paragraph  (b) of Rule 485 
_____  on (date)  pursuant to paragraph (b) of Rule 485 
_____  60 days after filing pursuant to  paragraph  (a) of Rule 485 
__X__  on September 30, 1997  pursuant  to  paragraph (a)(1) of Rule 485 
_____  75 days after  filing  pursuant to  paragraph  (a)(2) of Rule 485 
_____  on (date) pursuant to paragraph (a)(2) of Rule 485

The Registrant has registered an indefinite number or amount of Securities under
the Securities Act of 1933 pursuant to Rule 24f-2. The Rule 24f-2 notice for the
fiscal year ending October 31, 1996, was filed on December 24, 1996.
<PAGE>
================================================================================
                              CROSS REFERENCE SHEET

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

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

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


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

Item 10. Cover Page                 Cover Page
Item 11. Table of Contents          Table of Contents
Item 12. General Information        N/A
Item 13. Investment Objectives      Investment Objectives of
         and Policies               the Funds; Fundamental Policies
                                    of the Funds; Additional
                                    Investment Restrictions;
                                    Forward Currency Exchange
                                    Contracts; An Explanation of
                                    Fixed Income; Securities Ratings
                                    Short Sales; Portfolio Turnover;
                                    Interest Rate Futures Contracts
                                    and Related Options;
                                    Municipal Leases
Item 14. Management of the          Officers and Directors;
         Registrant                 Management;
                                    Custodians
Item 15. Control Persons            Capital Stock
         and Principal
         Holders of Securities
Item 16. Investment Advisory        Management;
         and Other Services         Custodians
Item 17. Brokerage Allocation       Brokerage;
                                    Performance Advertising
Item 18. Capital Stock and          Capital Stock;
         Other Securities           Multiple Class Structure
Item 19. Purchase, Redemption       N/A
         and Pricing of
         Securities Being
         Offered
Item 20. Tax Status                 N/A
Item 21. Underwriters               N/A
Item 22. Calculation of Yield       Performance Advertising
         Quotations of Money
         Market Funds
Item 23. Financial Statements       Financial Statements

<PAGE>
                                   PROSPECTUS
                               SEPTEMBER 30, 1997

                                   High Yield


                                 INVESTOR CLASS


                       AMERICAN CENTURY MUTUAL FUNDS, INC.

     American  Century  Mutual  Funds,  Inc.  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 from our Benham
Group that invests  primarily in high-yield  fixed income or debt instruments is
described  in this  Prospectus.  The  other  funds  are  described  in  separate
prospectuses.

     Through its Investor Class of shares,  American  Century offers investors a
full  line  of  no-load  funds,  investments  that  have  no  sales  charges  or
commissions.  This  Prospectus  gives  you  information  about the fund that you
should know before investing.  Please read this Prospectus  carefully and retain
it for future reference.  Additional information is included in the Statement of
Additional  Information  dated September 30, 1997, and filed with the Securities
and Exchange  Commission.  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).

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.



                        INVESTMENT OBJECTIVE OF THE FUND


AMERICAN CENTURY - BENHAM HIGH YIELD FUND

     High  Yield  seeks  high  current  income  by  investing  in a  diversified
portfolio of high-yielding corporate bonds, debentures and notes. As a secondary
objective,  the Fund seeks capital  appreciation,  but only when consistent with
the primary objective of maximizing  current income.  The Fund invests primarily
in lower-rated  bonds, which are subject to greater credit risk and consequently
offer higher  yield.  Securities of this type are subject to  substantial  risks
including  price  volatility,  liquidity  risk  and  default  risk.  You  should
carefully assess the risks associated with an investment in the Fund.

     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.

                                                                          Page 2

Transaction And Operating Expense Table.......................5

INFORMATION REGARDING THE FUND

Investment Policies Of The Fund...............................6

Investment Strategy...........................................6
    Generally.................................................6
    High Yield And Corporate Bonds............................6
    Zero-Coupon, Step-Coupon And Pay-In-Kind Securities.......7
    Convertible Securities....................................7
    Foreign Securities........................................8
    Loan Interests............................................8
    Money Market Instruments..................................8
    United States Government Securities.......................9
Fundamentals Of Fixed Income Investing........................9
Other Investment Practices, Their Characteristics And Risks..10
    Portfolio Turnover.......................................10
    Derivative Securities....................................10
    Covered Call Options.....................................11
    Portfolio Lending........................................12
    Repurchase Agreements....................................12
    When-Issued Securities...................................13
    Rule 144a Securities.....................................13
    Interest Rate Futures Contracts And Options Thereon......14
Performance Advertising......................................15

HOW TO INVEST WITH AMERICAN CENTURY INVESTMENTS

American Century Investments.................................16
                                                          
Investing In American Century................................16
How To Open An Account.......................................16
    By Mail..................................................16
    By Wire..................................................16
    By Exchange..............................................17
    In Person................................................17
    Subsequent Investments...................................17
    By Mail..................................................18
    By Telephone.............................................18
    By Online Access.........................................18
    By Wire..................................................18
    In Person................................................18
    Automatic Investment Plan................................18
How To Exchange From One Account To Another..................18
    By Mail..................................................19
    By Telephone.............................................19
    By Online Access.........................................19
How To Redeem Shares.........................................19
    By Mail..................................................19
    By Telephone.............................................19
    By Check-A-Month.........................................19
    Other Automatic Redemptions..............................19
    Redemption Proceeds......................................20
    By Check.................................................20
    By Wire And Ach..........................................20
    Redemption Of Shares In Low-Balance Accounts.............20
Signature Guarantee..........................................20
Special Shareholder Services.................................21
    Automated Information Line...............................21
    Online Account Access....................................21
    Tax-Qualified Retirement Plans...........................22
Important Policies Regarding Your Investments................22
Reports To Shareholders......................................23
Employer-Sponsored Retirement Plans 
    And Institutional Accounts...............................24

ADDITIONAL INFORMATION YOU SHOULD KNOW

Share Price..................................................25

    When Share Price Is Determined...........................25
    How Share Price Is Determined............................25
    Where To Find Information About Share Price..............26
Distributions................................................26
Taxes........................................................27
    Tax-Deferred Accounts....................................27
    Taxable Accounts.........................................27
Management...................................................28
    Investment Management....................................28
    Code Of Ethics...........................................29
    Transfer And Administrative Services.....................29
Distribution Of Fund Shares..................................30
Further Information About American Century...................30

                                                                          Page 3

                     Transaction And Operating Expense Table

                                                                     High Yield
                                                                           Bond
SHAREHOLDER TRANSACTION EXPENSES:
Maximum Sales Load Imposed on Purchases....................................none
Maximum Sales Load Imposed on Reinvested Dividends.........................none
Deferred Sales Load........................................................none
Redemption Fee(1)..........................................................none
Exchange Fee...............................................................none

ANNUAL FUND OPERATING EXPENSES:
(AS A PERCENTAGE OF NET ASSETS)
Management Fees...........................................................0.90%
12b-1 Fees.................................................................none
Other Expenses(2).........................................................0.00%
Total Fund Operating Expenses.............................................0.90%

EXAMPLE
                                                            --------------------
You would pay the following expenses on a $1,000            1 year           $9
investment, assuming a 5% annual return and redemption      3 year          $29
at the end of each time period:                             5 years         $50
                                                            10 years       $111
                                                            --------------------
(1)  Redemption proceeds sent by wire are subject to a $10 processing charge.
(2)  Other  expenses,  which  include  the fees and  expenses  (including  legal
     counsel  fees) of  those  directors  who are not  "interested  persons"  as
     defined in the Investment Company Act, are expected to be less than 0.01 of
     1% of average net assets for the current  fiscal  year.  

     The purpose of the table is to help you  understand  the various  costs and
expenses  that you,  as a  shareholder,  will bear  directly  or  indirectly  in
connection  with an  investment  in the class of shares of the American  Century
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 Securities and Exchange Commission regulations.

     Neither  the 5% rate of  return  nor the  expenses  shown  above  should be
considered  indications of past or future  returns and expenses.  Actual returns
and expenses may be greater or less than those shown.

     The shares offered by this Prospectus are Investor Class shares and have no
up-front or deferred sales charges,  commissions, or 12b-1 fees. The fund offers
two other classes of shares to investors,  primarily to institutional investors,
that have different fee structures  than the Investor  Class.  The difference in
the  fee  structures   among  the  classes  is  the  result  of  their  separate
arrangements for shareholder and distribution services and not the result of any
difference  in  amounts  charged by the  manager  for core  investment  advisory
services.  Accordingly,  the core  investment  advisory  expenses do not vary by
class. A difference in total fees will result in different  performance  for the
other  classes.  For  additional  information  about the  various  classes,  see
"Further Information About American Century," page 30.

                                                                          Page 5

                         INFORMATION REGARDING THE FUND


INVESTMENT POLICIES OF THE FUND

     The fund has adopted certain investment  restrictions that are set forth in
the  Statement of Additional  Information.  Those  restrictions,  as well as the
investment  objective of the fund identified on page 2 of this  Prospectus,  and
any other investment  policies designated as "fundamental" in this Prospectus or
in  the  Statement  of  Additional   Information,   cannot  be  changed  without
shareholder  approval.  The fund has implemented  additional investment policies
and  practices  to  guide  its  activities  in the  pursuit  of  its  investment
objective.  These policies and practices,  which are described  throughout  this
Prospectus,  are not  designated  as  fundamental  policies  and may be  changed
without  shareholder  approval.  For an explanation  of the  securities  ratings
referred to in the following  discussion,  see "An  Explanation  of Fixed Income
Securities Ratings" in the Statement of Additional Information.

INVESTMENT STRATEGY

GENERALLY
     The fund seeks high current income by investing in a diversified  portfolio
of  high-yielding   corporate  bonds,  debentures  and  notes.  As  a  secondary
objective,  the fund seeks capital  appreciation,  but only when consistent with
the primary objective of maximizing  current income.  The fund invests primarily
in lower-rated  bonds, which are subject to greater credit risk and consequently
offer higher  yield.  Securities of this type are subject to  substantial  risks
including  price  volatility,  liquidity  risk  and  default  risk.  You  should
carefully  assess the risks  associated with an investment in the fund. The fund
requires a minimum investment of $2,500 ($1,000 for IRAs).

     Under normal market conditions,  the fund will maintain at least 80% of the
value  of  its  total  assets  in  high-yielding  corporate  bonds,  other  debt
instruments  (including  income-producing  convertible and preferred securities)
denominated in U.S. dollars or foreign currencies. Up to 40% of the Fund's total
assets may be invested in fixed income obligations of foreign issuers, and up to
20% of its total assets may be invested in common stock or other  equity-related
securities,  excluding  convertible  and preferred  securities.  The fund is not
restricted  in  the  amount  of   income-producing   convertible  and  preferred
securities it is allowed to own.  Under normal market  conditions,  the fund may
invest up to 20% of its assets, and for temporary defensive purposes, up to 100%
of its assets, in short-term money market instruments.

HIGH YIELD AND CORPORATE BONDS

     The  securities  purchased by the fund generally will be rated in the lower
rating  categories  of  recognized  rating  agencies,  as low as Caa by  Moody's
Investors  Service,  Inc.  ("Moody's")  or D by Standard & Poor's  Ratings Group
("S&P"),  or in unrated securities that the Manager deems of comparable quality.
The Fund may hold  securities  with higher  ratings when the yield  differential
between low-rated and higher-rated  securities  narrows and the risk of loss may
be reduced substantially with only a relatively small reduction in yield.

                                                                          Page 6

     Issuers of high-yield  securities are more  vulnerable to real or perceived
economic  changes (such as an economic  downturn or a prolonged period of rising
interest  rates),  political  changes or adverse  developments  specific  to the
issuer.  Adverse  economic,  political  or other  developments  may  impair  the
issuer's  ability  to  service  principal  and  interest  obligations,  to  meet
projected business goals and to obtain additional  financing.  In the event of a
default,  the fund would experience a reduction of its income and could expect a
decline in the market value of the defaulted securities.

     The market for lower quality  securities is generally  less liquid than the
market for higher quality securities. Adverse publicity and investor perceptions
as well as new or proposed laws may also have a greater  negative  impact on the
market for lower quality  securities.  Sovereign debt of foreign  governments is
generally  rated by  country.  Because  these  ratings do not take into  account
individual factors relevant to each issue and may not be updated regularly,  the
Manager may elect to treat such securities as unrated debt.

     The fund will not  purchase  securities  rated lower than B by both Moody's
and S&P unless,  immediately after such purchase,  no more than 10% of its total
assets are invested in such securities.

ZERO-COUPON, STEP-COUPON AND PAY-IN-KIND SECURITIES

     The fund may invest in zero-coupon, step-coupon and pay-in-kind securities.
These  securities  are debt  securities  that do not make regular cash  interest
payments.  Zero-coupon and step-coupon securities are sold at a deep discount to
their face value.  Pay-in-kind  securities pay interest  through the issuance of
additional  securities.  Because such securities do not pay current cash income,
the price of these  securities  can be volatile when interest  rates  fluctuate.
While these  securities do not pay current cash income,  federal  income tax law
requires the holders of zero-coupon,  step-coupon and pay-in-kind  securities to
include in income each year the portion of the original issue discount and other
noncash income on such securities accrued during that year. In order to continue
to qualify for treatment as a "regulated  investment company" under the Internal
Revenue Code and avoid  certain  excise tax, the fund may be required to dispose
of other  portfolio  securities,  which may occur in periods  of adverse  market
prices, in order to generate cash to meet these distribution  requirements.  For
further information about taxes, see "TAXES" on page 27.

CONVERTIBLE SECURITIES

     Convertible securities are fixed-income securities that may be converted at
either a stated  price or stated rate into  underlying  shares of common  stock.
Convertible securities have general characteristics similar to both fixed-income
and  equity  securities.  Although  to a lesser  extent  than with  fixed-income
securities  generally,  the  market  value of  convertible  securities  tends to
decline as  interest  rates  increase  and,  conversely,  tends to  increase  as
interest rates decline.  In addition,  because of the  conversion  feature,  the
market value of convertible  securities  tends to vary with  fluctuations in the
market value of the underlying common stocks and, therefore,  also will react to
variations  in the general  market for equity  securities.  A unique  feature of
convertible  securities  is that as the market  price of the  underlying  common
stock

                                                                          Page 7

declines,  convertible  securities tend to trade  increasingly on a yield basis,
and so may not  experience  market  value  declines  to the same  extent  as the
underlying  common stock.  When the market price of the underlying  common stock
increases, the prices of the convertible securities tend to rise as a reflection
of the value of the underlying common stock. While no securities investments are
without risk,  investments in convertible  securities generally entail less risk
than investments in common stock of the same issuer.

FOREIGN SECURITIES

     The fund may invest in the securities of foreign issuers, including foreign
governments,  when these securities meet its standards of selection.  Securities
of foreign issuers may trade in the U.S. or foreign securities markets.

     Investments  in foreign  securities may present  certain  risks,  including
those resulting from fluctuations in currency  exchange rates,  future political
and economic developments, reduced availability of public information concerning
issuers,  and the fact that foreign issuers are not generally subject to uniform
accounting,  auditing and financial  reporting  standards or to other regulatory
practices and requirements comparable to those applicable to domestic issuers.

     Because  most foreign  securities  are  denominated  in  non-United  States
currencies,  the investment performance of the fund could be affected by changes
in foreign currency  exchange rates. The value of the fund's assets  denominated
in foreign  currencies  will increase or decrease in response to fluctuations in
the value of those  foreign  currencies  relative to the United  States  dollar.
Currency  exchange  rates can be  volatile  at times in  response  to supply and
demand in the currency  exchange  markets,  international  balances of payments,
governmental  intervention,   speculation,  and  other  political  and  economic
conditions.

     The fund may  purchase  and sell  foreign  currency on a spot basis and hay
engage in forward currency contracts,  currency options and futures transactions
for hedging or any other lawful purpose. (See "Derivative  Securities",  on page
10.)

     The fund may  invest up to 40% of its total  assets  in the  securities  of
foreign issuers.

LOAN INTERESTS

     The fund may invest a portion of its  assets in loan  interests,  which are
interests  in amounts  owed by a corporate,  governmental  or other  borrower to
lenders or lending  syndicates.  Loan interests purchased by the fund may have a
maturity of any number of days or years,  and may be acquired from United States
and foreign banks,  insurance  companies,  finance  companies or other financial
institutions  that have made loans or are members of a lending syndicate or from
the holders of loan interests.  Loan interests  involve the risk of loss in case
of default or  bankruptcy  of the  borrower  and,  in the case of  participation
interests,  involve  a risk of  insolvency  of the agent  lending  bank or other
financial  intermediary.  Loan interests are not rated by any NRSROs and are, at
present,  not readily marketable and may be subject to contractual  restrictions
on resale.

MONEY MARKET INSTRUMENTS

     As noted,  the fund may invest in the  following  short-term  money  market
instruments:

                                                                          Page 8

(1)  Securities issued or guaranteed by the U.S. government and its agencies and
     instrumentalities;

(2)  Commercial Paper;

(3)  Certificates of Deposit and Euro Dollar Certificates of Deposit;

(4)  Bankers' Acceptances;

(5)  Short-term notes, bonds, debentures, or other debt instruments; and

(6)  Repurchase agreements.

     The fund may invest up to 20% of its assets,  and for  temporary  defensive
purposes as  determined  by the manager,  up to 100% of its assets in short-term
money market instruments.

UNITED STATES GOVERNMENT SECURITIES

     The government  securities in which the fund may invest include: (1) direct
obligations of the United States, such as Treasury bills, notes and bonds, which
are  supported  by the full  faith and  credit  of the  United  States,  and (2)
obligations  (including  mortgage-related  securities)  issued or  guaranteed by
agencies  and  instrumentalities  of  the  United  States  government  that  are
established  under an act of Congress.  The securities of some of these agencies
and instrumentalities, such as the Government National Mortgage Association, are
guaranteed  as to  principal  and  interest  by the  U.S.  Treasury,  and  other
securities  are  supported by the right of the issuer,  such as the Federal Home
Loan Banks,  to borrow from the Treasury.  Other  obligations,  including  those
issued by the Federal  National  Mortgage  Association and the Federal Home Loan
Mortgage Corporation, are supported only by the credit of the instrumentality.

FUNDAMENTALS OF FIXED INCOME INVESTING

     Over  time,  the  level of  interest  rates  available  in the  marketplace
changes. As prevailing rates fall, the prices of bonds and other securities that
trade on a yield basis rise. On the other hand, when  prevailing  interest rates
rise, bond prices fall.

     Generally, the longer the maturity of a debt security, the higher its yield
and the greater its price volatility.  Conversely, the shorter the maturity, the
lower the yield but the greater the price stability.

     These factors  operating in the  marketplace  have a similar impact on bond
portfolios.  A change in the level of interest  rates causes the net asset value
per share of any bond fund,  except money market funds, to change.  If sustained
over time, it would also have the impact of raising or lowering the yield of the
fund.

     In addition to the risk arising from fluctuating interest rate levels, debt
securities  are  subject to credit  risk.  When a  security  is  purchased,  its
anticipated  yield is  dependent  on the timely  payment by the borrower of each
interest and principal installment.

     Credit  analysis and resultant  bond ratings take into account the relative
likelihood that such timely payment will occur. As a result,  lower-rated bonds,
such as those in which the fund  invests,  tend to sell at higher  yield  levels
than top-rated bonds of similar maturity.

Authorized Credit Quality Range          
          A-1          A-2    A-3  

                                                                          Page 9

          P-1          P-2    P-3
        MIG-1        MIG-2  MIG-3
         SP-1         SP-2   SP-2
   AAA     AA     A    BBB     BB     B    CCC     CC     C      D
- -------------------------------------------------------------------
******* ****** ***** ###### ###### ##### ###### ****** ***** ******
- -------------------------------------------------------------------
*    Denotes authorized quality
#    Denotes expected quality range of at least 80% of total assets of the fund

     In addition, as economic, political and business developments unfold, these
lower-quality  bonds,  which possess  lower levels of protection  with regard to
timely payment,  usually exhibit more price  fluctuation than do  higher-quality
bonds of like maturity.

     The investment practices of the fund take into account these relationships.
The intermediate- to long-term  maturity and the lower asset quality of the fund
have  implications  for the degree of price volatility and the yield level to be
expected from an investment in the fund. Investors should be aware that the fund
has higher price volatility potential and higher yield potential than funds that
invest in higher-quality debt securities.

OTHER INVESTMENT PRACTICES, THEIR CHARACTERISTICS AND RISKS

     For additional information, see "Additional Investment Restrictions" in 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  objectives.
The manager  believes that the rate of portfolio  turnover is irrelevant when it
determines a change is in order to achieve those objectives and accordingly, the
annual portfolio turnover rate cannot be anticipated.

     The  portfolio  turnover of the fund may be higher than other  mutual funds
with   similar   investment   objectives.   Higher   turnover   would   generate
correspondingly  greater  brokerage  commissions,  which is a cost that the fund
pays  directly.  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.

DERIVATIVE SECURITIES

     To the extent permitted by its investment objectives and policies, the fund
may  invest  in  securities  that  are  commonly  referred  to  as  "derivative"
securities.  Generally,  a derivative is a financial  arrangement,  the value of
which is based on, or "derived" from, a traditional  security,  asset, or market
index.   Certain  derivative   securities  are  more  accurately   described  as
"index/structured"   securities.   Index/structured  securities  are  derivative
securities whose value or performance is linked to other equity securities (such
as depositary receipts),  currencies, interest rates, indices or other financial
indicators ("reference indices").

                                                                         Page 10

     Some  "derivatives"  such  as   mortgage-related   and  other  asset-backed
securities are in many respects like any other investment,  although they may be
more volatile or less liquid than more traditional debt securities.

     There are many different  types of  derivatives  and many different ways to
use them. Futures and options are commonly used for traditional hedging purposes
to  attempt  to protect  the fund from  exposure  to  changing  interest  rates,
securities  prices, or currency exchange rates and for cash management  purposes
as a low-cost  method of gaining  exposure  to a  particular  securities  market
without investing directly in those securities.

     The fund may invest in a derivative  security unless the reference index or
the  instrument to which it relates is an eligible  investment for the fund. For
example,  a bond  whose  interest  rate is  indexed  to the  return on  two-year
treasury  securities  would be a permissible  investment  (assuming it otherwise
meets the other  requirements for the funds),  while a security whose underlying
value is linked to the price of oil would not be a permissible  investment since
the funds may not invest in oil and gas leases or futures.

     The return on a derivative  security  may  increase or decrease,  depending
upon changes in the reference index or instrument to which it relates.

     There  are  a  range  of  risks  associated  with  derivative  investments,
including:

     the risk that the underlying security, interest rate, market index or other
     financial  asset  will  not move in the  direction  the  portfolio  manager
     anticipates;

     the  possibility  that  there may be no  liquid  secondary  market,  or the
     possibility that price  fluctuation  limits may be imposed by the exchange,
     either of which may make it difficult or impossible to close out a position
     when desired;

     the risk that adverse price movements in an instrument can result in a loss
     substantially greater than the fund's initial investment; and

     the risk that the counterparty will fail to perform its obligations.

     The  Board  of  Directors  has  approved  the  manager's  policy  regarding
investments in derivative securities. That policy specifies factors that must be
considered in connection  with a purchase of derivative  securities.  The policy
also establishes a committee that must review certain proposed  purchases before
the  purchases  can be  made.  The  manager  will  report  on fund  activity  in
derivative securities to the Board of Directors as necessary.  In addition,  the
Board will review the manager's policy for investments in derivative  securities
annually.

COVERED CALL OPTIONS

     The fund may write  call  options on  securities.  The fund  realizes  fees
(referred to as "premiums") for granting the rights evidenced by the options.  A
call  option  embodies  the right of its  purchaser  to compel the writer of the
option to sell to the option holder an underlying  security at a specified price
at any time  during the option  period.  Thus,  the  purchaser  of a call option
written  by the fund  has the  right to  purchase  from the fund the  underlying
security owned by the fund at the agreed-upon price for a specified time period.

     Upon the exercise of a call option written by the fund, the fund may suffer
a loss equal to the  excess of the  security's  market  value at the time of the
option  exercise  over the fund's  acquisition  cost of the  security,  less the
premium received for writing the option.

                                                                         Page 11

     The fund will write only covered  options.  Accordingly,  whenever the fund
writes a call  option,  it will  continue  to own or have the  present  right to
acquire  the  underlying  security  for as long as it remains  obligated  as the
writer of the option.

     The fund may engage in a closing  purchase  transaction to realize a profit
or to  unfreeze  an  underlying  security  (thereby  permitting  its sale or the
writing  of a new  option  on the  security  prior to the  outstanding  option's
expiration). To effect a closing purchase transaction,  the fund would purchase,
prior to the holder's  exercise of an option the fund has written,  an option of
the same series as that on which the fund desires to terminate  its  obligation.
The obligation of the fund under an option it has written would be terminated by
a  closing  purchase  transaction,  but the fund  would  not be deemed to own an
option as the result of the transaction. There can be no assurance the fund will
be able to effect closing  purchase  transactions at a time when it wishes to do
so. To facilitate closing purchase  transactions,  however,  the fund ordinarily
will  write  options  only if a  secondary  market for the  options  exists on a
domestic securities exchange or in the over-the-counter market.

PORTFOLIO LENDING

     In order to  realize  additional  income,  the fund may lend its  portfolio
securities  to  persons  not  affiliated  with  it  and  who  are  deemed  to be
creditworthy.  Such  loans  must be  secured  continuously  by  cash  collateral
maintained on a current basis in an amount at least equal to the market value of
the securities loaned, or by irrevocable letters of credit. During the existence
of the loan,  the fund must  continue to receive the  equivalent of the interest
and dividends  paid by the issuer on the  securities  loaned and interest on the
investment of the collateral.  The fund must have the right to call the loan and
obtain the  securities  loaned at any time on five days' notice,  including,  if
applicable,  the  right  to  call  the  loan to  enable  the  fund  to vote  the
securities.

     Loans may not exceed 33 1/3% of the fund's  total  assets  taken at market.
Interest on loaned  securities  may not exceed 10% of the annual gross income of
the fund (without offset for realized capital gains).

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 that 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 interest-bearing  obligation  purchased  constitutes security for
the  repurchase  obligation,  a repurchase  agreement  can be  considered a loan
collateralized 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 

                                                                         Page 12

be delayed or limited.  To the extent the value of the security  decreases,  the
fund could experience a loss.

     The fund will limit repurchase agreement  transactions to securities issued
by the United States government,  its agencies and  instrumentalities,  and will
enter into such  transactions  with those banks and  securities  dealers who are
deemed  creditworthy  pursuant  to  criteria  adopted  by the  funds'  Board  of
Directors.

     The fund may invest in repurchase  agreements  with respect to any security
in which the fund is authorized to invest, even if the remaining maturity of the
underlying  security  would make that  security  ineligible  for purchase by the
fund.

WHEN-ISSUED SECURITIES

     The fund may  sometimes  purchase new issues of securities on a when-issued
basis without the limit when, in the opinion of the manager, such purchases will
further  the  investment  objectives  of the  fund.  The  price  of  when-issued
securities is established at the time  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 when-issued
security. Accordingly, the value of each security may decline prior to delivery,
which  could  result  in a loss to the fund.  A  separate  account  for the fund
consisting of cash or high-quality  liquid debt securities in an amount at least
equal to the when-issued commitments will be established and maintained with the
custodian. No income will accrue to the fund prior to delivery.

RULE 144A SECURITIES

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

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

     Since the  secondary  market  for such  securities  is  limited  to certain
qualified  institutional  investors,  the  liquidity of such  securities  may be
limited  accordingly  and the fund  may,  from  time to time,  hold a Rule  144A
security that is illiquid.  In such an event,  the fund's  manager will consider
appropriate remedies to minimize the effect on the fund's liquidity.

                                                                         Page 13

     The fund may not invest more than 15% of its assets in illiquid  securities
(securities  that may not be sold within seven days at  approximately  the price
used in determining the net asset value of fund shares).

INTEREST RATE FUTURES CONTRACTS AND OPTIONS THEREON

     The fund may buy and sell interest rate futures contracts  relating to debt
securities ("debt futures," i.e., futures relating to debt securities, and "bond
index futures," i.e.,  futures  relating to indexes on types or groups of bonds)
and  write  and buy put and call  options  relating  to  interest  rate  futures
contracts.

     For  options  sold,  the fund  will  segregate  cash or  high-quality  debt
securities  equal to the value of  securities  underlying  the option unless the
option is otherwise covered.

     The fund will  deposit in a  segregated  account  with its  custodian  bank
appropriate  debt  obligations  or equity  securities  in an amount equal to the
fluctuating  market value of long futures  contracts it has purchased,  less any
margin  deposited  on its long  position.  It may hold cash or acquire such debt
obligations for the purpose of making these deposits.

     The fund will purchase or sell futures  contracts and options  thereon only
for the purpose of hedging  against changes in the market value of its portfolio
securities  or  changes in the market  value of  securities  that it may wish to
include  in  its  portfolio.   The  fund  will  enter  into  future  and  option
transactions only to the extent that the sum of the amount of margin deposits on
its existing  futures  positions  and premiums  paid for related  options do not
exceed 5% of its assets.

     Since futures contracts and options thereon can replicate  movements in the
cash markets for the securities in which the fund invests without the large cash
investments  required for dealing in such markets,  they may subject the fund to
greater and more volatile risks than might  otherwise be the case. The principal
risks related to the use of such instruments are (1) the offsetting  correlation
between  movements in the market  price of the  portfolio  investments  (held or
intended) being hedged and in the price of the futures contract or option may be
imperfect;  (2)  possible  lack of a liquid  secondary  market for  closing  out
futures or option positions;  (3) the need for additional  portfolio  management
skills  and  techniques;  and  (4)  losses  due to  unanticipated  market  price
movements.  For a hedge to be  completely  effective,  the  price  change of the
hedging instrument should equal the price change of the securities being hedged.
Such  equal  price  changes  are not  always  possible  because  the  investment
underlying the hedging  instrument may not be the same  investment that is being
hedged.

     The manager will attempt to create a closely  correlated  hedge but hedging
activity  may  not  be  completely   successful  in  eliminating   market  value
fluctuation.  The  ordinary  spreads  between  prices  in the cash  and  futures
markets,  due to the differences in the natures of those markets, are subject to
distortion.  Due to the possibility of distortion, a correct forecast of general
interest  rate  trends  by the  manager  may still  not  result in a  successful
transaction.  The manager may be incorrect in its  expectations as to the extent
of various  interest rate  movements or the time span within which the movements
take place.

                                                                         Page 14

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 and yield.
Performance  data may be quoted  separately  for the Investor  Class and for the
other classes.

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

     A  quotation  of yield  reflects  the fund's  income  over a stated  period
expressed as a percentage  of 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.

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

     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 the Bank Rate
Monitor  National Index of 2 1/2 -year CD rates.  Fund  performance  may also be
compared,  on a relative basis, to 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.

                                                                         Page 15

                 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, 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 information contained
in  our  Investor   Services   Guide,   may  not  apply  to  you.   Please  read
"Employer-Sponsored Retirement Plans and Institutional Accounts," page 24.

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:

                                                                         Page 16

(*)    Receiving bank and routing number:
       Commerce Bank, N.A. (101000019)

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

(*)    Beneficiary account number (BNF ACCT):
       2804918

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

(*)    Originator to Beneficiary (OBI):
       Name and address of owner of account into which you are investing.

(*)    Bank to Bank Information
       (BBI or Free Form Text):

     ,    Taxpayer identification or Social Security number

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

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

BY EXCHANGE

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

IN PERSON

     If you prefer to work with a representative in person,  please visit one of
our 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.

                                                                         Page 17

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 18 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 page 17.

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 investment  requirements,  you may exchange
your fund  shares to our other  funds up to six times per year per  account.  An
exchange  request  will be  processed as of the same day it is received if it is
received  before the funds' net asset values are  calculated,  which is one hour
prior to the close of the New York Stock Exchange for funds issued by the Benham
Target  Maturities  Trust, and at the close of the Exchange for all of our other
funds. See "When Share Price is Determined," page 25.

     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 

                                                                         Page 18

Plan  between  any two funds in the  amount of at least $50 per  month.  See our
Investor Services Guide for further information about exchanges.

BY MAIL

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

BY TELEPHONE

     You may make exchanges over the telephone (either with an Investor Services
Representative  or using our Automated  Information  Line -- see page 21) 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 receive 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 completed redemption request
is received.

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

BY MAIL

     Your  written  instructions  to  redeem  shares  may be  made  either  by a
redemption  form,  which we will  send you upon  request,  or by a letter to us.
Certain  redemptions  may require a signature  guarantee.  Please see "Signature
Guarantee," page 20.

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 to you or your
account  at  a  bank  or  other  financial  institution.  To  set  up  automatic
redemptions, call one of our Investor Services Representatives.

                                                                         Page 19

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  of
bringing  the value of the  shares  held in the  account up to the  minimum.  If
action is not taken within 90 days of the letter's  date, the shares held in the
account will be redeemed and the proceeds  from the  redemption  will be sent by
check to your address of record. We reserve the right to increase the investment
minimums.

SIGNATURE GUARANTEE

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

     *    redeeming more than $25,000; or

     *    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.

                                                                         Page 20

     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 autho rized 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  funds'  daily  share  prices,  receive
updates on major market indexes and view  historical  performance of your funds.
If you select "Full  Services" on your  applications,  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 per-son.  These  transactions  are subject to
exchange limitations described in each fund's prospectus, except that orders and
cancellations  received  

                                                                         Page 21

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.

TAX-QUALIFIED RETIREMENT PLANS

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

*    Individual Retirement Accounts (IRAs);

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

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

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

     You 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.

                                                                         Page 22

(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.

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

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

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

     Each year, we will send you an annual and a semi-annual  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  semi-annual  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.

                                                                         Page 23

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.

                                                                         Page 24

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

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

     Investments  are  considered  received only when payment is received by us.
Wired funds are  considered  received on the day they are  deposited in our bank
account if they are deposited before the close of business on the Exchange.

     Investments by telephone pursuant to your prior authorization to us to draw
on your bank account are considered received at the time of your telephone call.
Investment and  transaction  instructions  received by us on any business day by
mail  prior to the time as of  which  the net  asset  value is  determined,  are
effective on, and will receive the price determined,  that day.  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  request 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 funds'  procedures or any contractual  arrangement  with the
funds or the funds' 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:  The portfolio  securities of the fund,  except as otherwise  noted,
listed or traded on a domestic  securities  exchange are valued at the last sale
price  on that  exchange.  Portfolio  securities  primarily  traded  on  foreign
securities  exchanges 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

                                                                         Page 25

available, securities and other assets are valued at fair value as determined in
accordance with procedures adopted by the Board of Directors.

     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 Directors.

     The value of an  exchange-traded  foreign  security  is  determined  in its
national currency as of the close of trading on the foreign exchange on which it
is traded or as of the close of business on the New York Stock Exchange, if that
is earlier.  That value is then converted to dollars at the  prevailing  foreign
exchange rate.

     Trading in securities on European and Far Eastern securities  exchanges and
over-the-counter markets is normally completed at various times before the close
of  business on each day that the New York Stock  Exchange is open.  If an event
were to occur after the value of a security was  established  but before the net
asset value per share was  determined  that was likely to materially  change the
net asset value,  then that security would be valued at fair value as determined
in accordance with procedures adopted by the Board of Directors.

     Trading of these  securities in foreign markets may not take place on every
New York Stock  Exchange  business  day. In addition,  trading may take place in
various  foreign  markets on  Saturdays or on other days when the New York Stock
Exchange is not open and on which the fund's net asset value is not  calculated.
Therefore,  such  calculation  does not take  place  contemporaneously  with the
determination  of the prices of many of the  portfolio  securities  used in such
calculation  and the value of the fund's  portfolio may be affected on days when
shares of the fund may not be purchased or redeemed.

WHERE TO FIND INFORMATION ABOUT SHARE PRICE

     The net  asset  value of the  Investor  Class of the fund  offered  by this
Prospectus is published in leading  newspapers  daily. Net asset values may also
be    obtained    by    calling    us   or   by    accessing    our   Web   site
(www.americancentury.com).

DISTRIBUTIONS

     At the close of each day, including  Saturdays,  Sundays and holidays,  net
income  of  the  fund  is  determined  and  declared  as  a  distribution.   The
distribution  will be paid  monthly on the last Friday of each month  except for
year-end distributions, which will be paid on the last business day of the year.

     You will  begin to  participate  in the  distributions  the day after  your
purchase is  effective.  See "When Share Price is  Determined,"  page 25. 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  securities  gains, if any,  generally are
declared and paid once a year,  but the funds may make  distributions  on a more
frequent  basis to comply with the  distribution  requirements  of the  Internal
Revenue  Code and  

                                                                         Page 26

Regulations,  in all events in a manner  consistent  with the  provisions of the
Investment Company 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  59 1/2  years  old or
permanently and totally disabled. Distribution checks normally are mailed within
seven days after the record date. Please consult our Investor Services Guide for
further information regarding your distribution options.

TAXES

     The fund has elected to be taxed under Subchapter M of the Internal Revenue
Code,  which means that to the extent its income is distributed to shareholders,
it pays no income 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 funds 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
fixed income funds do not qualify for the 70%  dividends-received  deduction for
corporations since they are derived from interest income. Distributions from net
long-term capital gains are taxable as long-term capital gains regardless of the
length of time the shares on which such distributions are paid have been held by
the shareholder.  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.

     Distributions  are taxable to you  regardless  of whether they are taken in
cash or reinvested,  even if the value of your shares is below your cost. If you
purchase shares shortly before a distribution,  you must pay income taxes on the
distribution,  even though the value of your investment (plus cash received,  if
any) will not have  increased.  In  addition,  the  share  price at the time you
purchase  shares may  include  unrealized  gains in the  securities  held in the
investment portfolio of the fund. If these portfolio 

                                                                         Page 27

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 the fund pays  distributions to its  shareholders.  You should consult your
tax advisor about the tax status of such distributions in your own state.

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

MANAGEMENT

INVESTMENT MANAGEMENT

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

     The manager supervises and manages the investment portfolio of the fund and
directs the purchase and sale of its investment securities. It utilizes teams of
portfolio

                                                                         Page 28

managers,  assistant  portfolio  managers and analysts acting together to manage
the assets of the funds. The teams meet regularly to review  portfolio  holdings
and to discuss  purchase and sale  activity.  The teams  adjust  holdings in the
fund's  portfolio as they deem  appropriate in pursuit of the fund's  investment
objective.  Individual  portfolio  manager  members of the teams may also adjust
portfolio holdings of the fund as necessary between team meetings.

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

     Norman E. Hoops,  Senior Vice President and Fixed Income Portfolio Manager,
joined  American  Century as Vice  President and  Portfolio  Manager in November
1989. In April 1993, he became Senior Vice President. He is also a member of the
team that manages Limited-Term Bond, Intermediate-Term Bond, Benham Bond and the
fixed income portion of Balanced and the Strategic Allocation Funds.

     Theresa Fennell,  Portfolio Manager,  joined American Century in June 1997.
Prior to joining American Century,  she was an Assistant  Portfolio Manager with
Smith Barney Mutual Funds Management, Inc.

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

     For the services  provided to the Investor  Class of the fund,  the manager
receives  an annual fee at the rate of 0.90% of the  average  net assets of High
Yield.

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

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 portfolios
obtain  preclearance before executing personal trades. With respect to Portfolio
Managers  and  other  investment   personnel,   the  Code  of  Ethics  prohibits
acquisition  of securities  in an initial  public  offering,  as well as profits
derived from the purchase and sale of the same security within 60 calendar days.
These provisions are designed to ensure that the interests of fund  shareholders
come before the interests of the people who manage the fund.

TRANSFER AND ADMINISTRATIVE SERVICES

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

                                                                         Page 29

     Certain  recordkeeping and administrative  services that would otherwise be
performed  by the transfer  agent may be  performed  by an insurance  company or
other  entity  providing  similar  services for various  retirement  plans using
shares  of the  funds as a  funding  medium,  by  broker-dealers  and  financial
advisors  for their  customers  investing  in shares of  American  Century or by
sponsors of multi mutual fund no- or low-transaction  fee programs.  The manager
or an affiliate may enter into contracts to pay them for such  recordkeeping and
administrative services out of its unified management fee.

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

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

     The manager and transfer  agent are both wholly  owned by American  Century
Companies, Inc. James E. Stowers Jr., Chairman of the funds' Board of Directors,
controls  American Century Companies 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
funds'  investment  manager.  The manager pays all expenses  for  promoting  and
distributing the Investor Class of fund shares offered by this  Prospectus.  The
Investor  Class of  shares  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.

FURTHER INFORMATION ABOUT AMERICAN CENTURY

     American Century Mutual Funds,  Inc., the issuer of the fund, was organized
as a Maryland corporation on July 2, 1990. The corporation  commenced operations
on February 28, 1991, the date it merged with Twentieth Century Investors, Inc.,
a Delaware  corporation which had been in business since October 1958.  Pursuant
to the  terms of the  Agreement  and Plan of Merger  dated  July 27,  1990,  the
Maryland  corporation was the surviving entity and continued the business of the
Delaware corporation with the same officers and directors, the same shareholders
and the same investment objectives, policies and restrictions.

                                                                         Page 30

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

     American  Century  Mutual  Funds,  Inc.  issues 18 series of $.01 par value
shares.  Each series is commonly  referred to as a fund. The assets belonging to
each series of shares are held separately by the custodian.

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

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

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

     Each share,  irrespective  of series or class,  is entitled to one vote for
each dollar of net asset value applicable to such share on all questions, except
those matters which must be voted on separately by the series or class of shares
affected. Matters affecting only one series or class are voted upon only by that
series.  Shares have non-cumulative  voting rights, which means that the holders
of more than 50% of the votes cast in an election of directors  can elect all of
the  directors  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
Directors.

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

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

                                                                         Page 31
<PAGE>
                                   PROSPECTUS
                               SEPTEMBER 30, 1997

                                   High Yield


                                  ADVISOR CLASS


                       AMERICAN CENTURY MUTUAL FUNDS, INC.

     American  Century  Mutual  Funds,  Inc.  is  a  part  of  American  Century
Investments,  a family of funds that  includes  nearly 70 no-load  and  low-load
mutual funds  covering a variety of investment  opportunities.  One of the funds
from our Benham Group that invests  primarily in high-yield fixed income or debt
instruments  is described in this  Prospectus.  The other funds are described in
separate prospectuses.

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

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

     This Prospectus gives you information  about the funds 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 30, 1997, and filed with the Securities and Exchange
Commission.  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 419385
                Kansas City, Missouri 64141-6385 o 1-800-345-3533
                        International calls: 816-531-5575
                     Telecommunications Device for the Deaf:
                   1-800-345-1833 o In Missouri: 816-753-0700
                        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).

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.

                                                                          Page 2

                        INVESTMENT OBJECTIVE OF THE FUND


AMERICAN CENTURY - BENHAM HIGH YIELD FUND

     High  Yield  seeks  high  current  income  by  investing  in a  diversified
portfolio of high-yielding corporate bonds, debentures and notes. As a secondary
objective,  the Fund seeks capital  appreciation,  but only when consistent with
the primary objective of maximizing  current income.  The Fund invests primarily
in lower-rated  bonds, which are subject to greater credit risk and consequently
offer higher  yield.  Securities of this type are subject to  substantial  risks
including  price  volatility,  liquidity  risk  and  default  risk.  You  should
carefully assess the risks associated with an investment in the Fund.

     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.

                                                                          Page 3

                                TABLE OF CONTENTS

Transaction And Operating Expense Table.......................5

INFORMATION REGARDING THE FUND

Investment Policies Of The Fund...............................7

Investment Strategy...........................................7
    Generally.................................................7
    High Yield And Corporate Bonds............................7
    Zero-Coupon, Step-Coupon And Pay-In-Kind Securities.......8
    Convertible Securities....................................8
    Foreign Securities........................................9
    Loan Interests............................................9
    Money Market Instruments..................................9
    United States Government Securities......................10
Fundamentals Of Fixed Income Investing.......................10
Other Investment Practices, Their Characteristics And Risks..11
    Portfolio Turnover.......................................11
    Derivative Securities....................................11
    Covered Call Options.....................................12
    Portfolio Lending........................................13
    Repurchase Agreements....................................13
    When-Issued Securities...................................14
    Rule 144a Securities.....................................14
    Interest Rate Futures Contracts And Options Thereon......15
Performance Advertising......................................16

HOW TO INVEST WITH AMERICAN CENTURY INVESTMENTS

How To Purchase And Sell American Century Funds..............17

How To Exchange From One American Century Fund To Another....17
How To Redeem Shares.........................................17
Telephone Services...........................................18
    Investors Line...........................................18

ADDITIONAL INFORMATION YOU SHOULD KNOW

Share Price..................................................19

    When Share Price Is Determined...........................19
    How Share Price Is Determined............................19
    Where To Find Information About Share Price..............20
Distributions................................................20
Taxes........................................................21
    Tax-Deferred Accounts....................................21
    Taxable Accounts.........................................21
Management...................................................22
    Investment Management....................................22
    Code Of Ethics...........................................23
    Transfer And Administrative Services.....................23
Distribution Of Fund Shares..................................24
    Service And Distribution Fees............................24
Further Information About American Century...................25

                                                                          Page 4

                     TRANSACTION AND OPERATING EXPENSE TABLE
                                                                     High Yield
                                                                           Bond
SHAREHOLDER TRANSACTION EXPENSES:
Maximum Sales Load Imposed on Purchases....................................none
Maximum Sales Load Imposed on Reinvested Dividends.........................none
Deferred Sales Load........................................................none
Redemption Fee.............................................................none
Exchange Fee...............................................................none

ANNUAL FUND OPERATING EXPENSES:
(AS A PERCENTAGE OF NET ASSETS)
Management Fees...........................................................0.65%
12b-1 Fees(1)..............................................................none
Other Expenses(2).........................................................0.50%
Total Fund Operating Expenses.............................................1.15%

EXAMPLE
                                                            -------------------
You would pay the following expenses on a $1,000            1 year         $12
investment, assuming a 5% annual return and redemption      3 year         $37
at the end of each time period:                             5 years        $63
                                                            10 years      $140
                                                            -------------------

(1)  The 12b-1 fee is designed to permit  investors  to purchase  Advisor  Class
     shares  through  broker-dealers,   banks,  insurance  companies  and  other
     financial  intermediaries.  A portion of the fee is used to compensate them
     for ongoing recordkeeping and administrative  services that would otherwise
     be  performed  by an  affiliate  of the  manager,  and a portion is used to
     compensate them for distribution and other shareholder services.
     See "Service and Distribution Fees," page 24.

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

     The purpose of the table is to help you  understand  the various  costs and
expenses  that you,  as a  shareholder,  will bear  directly  or  indirectly  in
connection  with an  investment  in the class of shares of the American  Century
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 Securities and Exchange Commission regulations.

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

     The shares offered by this  Prospectus  are Advisor Class shares.  The fund
offers one other classes of shares which is primarily  made  available to retail
investors. The other class has a different fee structure than the Advisor Class.
The  difference in the fee  structures  among the classes is the result of their
separate  arrangements  for  shareholder and  distribution  services and not the
result of any difference in amounts  charged by the manager for core  investment
advisory  services.  Accordingly,  the core investment  advisory expenses do not
vary by class.  A difference  in fees will result in 

                                                                          Page 5

different  performance for those classes.  For additional  information about the
various classes, see "Further Information About American Century," page 25.

                                                                          Page 6

                         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 3 of this  Prospectus,  and
any other investment  policies designated as "fundamental" in this Prospectus or
in  the  Statement  of  Additional   Information,   cannot  be  changed  without
shareholder  approval.  The fund has implemented  additional investment policies
and  practices  to  guide  its  activities  in the  pursuit  of  its  investment
objective.  These policies and practices,  which are described  throughout  this
Prospectus,  are not  designated  as  fundamental  policies  and may be  changed
without  shareholder  approval.  For an explanation  of the  securities  ratings
referred to in the following  discussion,  see "An  Explanation  of Fixed Income
Securities Ratings" in the Statement of Additional Information.

INVESTMENT STRATEGY

GENERALLY

     The fund seeks high current income by investing in a diversified  portfolio
of  high-yielding   corporate  bonds,  debentures  and  notes.  As  a  secondary
objective,  the fund seeks capital  appreciation,  but only when consistent with
the primary objective of maximizing  current income.  The fund invests primarily
in lower-rated  bonds, which are subject to greater credit risk and consequently
offer higher  yield.  Securities of this type are subject to  substantial  risks
including  price  volatility,  liquidity  risk  and  default  risk.  You  should
carefully  assess the risks  associated with an investment in the fund. The fund
requires a minimum investment of $2,500 ($1,000 for IRAs).

     Under normal market conditions,  the fund will maintain at least 80% of the
value  of  its  total  assets  in  high-yielding  corporate  bonds,  other  debt
instruments  (including  income-producing  convertible and preferred securities)
denominated in U.S. dollars or foreign currencies. Up to 40% of the Fund's total
assets may be invested in fixed income obligations of foreign issuers, and up to
20% of its total assets may be invested in common stock or other  equity-related
securities,  excluding  convertible  and preferred  securities.  The fund is not
restricted  in  the  amount  of   income-producing   convertible  and  preferred
securities it is allowed to own.  Under normal market  conditions,  the fund may
invest up to 20% of its assets, and for temporary defensive purposes, up to 100%
of its assets, in short-term money market instruments.

HIGH YIELD AND CORPORATE BONDS

     The  securities  purchased by the fund generally will be rated in the lower
rating  categories  of  recognized  rating  agencies,  as low as Caa by  Moody's
Investors  Service,  Inc.  ("Moody's")  or D by Standard & Poor's  Ratings Group
("S&P"),  or in unrated securities that the Manager deems of comparable quality.
The Fund may hold  securities  with higher  ratings when the yield  differential
between low-rated and higher-rated  securities  narrows and the risk of loss may
be reduced substantially with only a relatively small reduction in yield.

                                                                          Page 7

     Issuers of high-yield  securities are more  vulnerable to real or perceived
economic  changes (such as an economic  downturn or a prolonged period of rising
interest  rates),  political  changes or adverse  developments  specific  to the
issuer.  Adverse  economic,  political  or other  developments  may  impair  the
issuer's  ability  to  service  principal  and  interest  obligations,  to  meet
projected business goals and to obtain additional  financing.  In the event of a
default,  the fund would experience a reduction of its income and could expect a
decline in the market value of the defaulted securities.

     The market for lower quality  securities is generally  less liquid than the
market for higher quality securities. Adverse publicity and investor perceptions
as well as new or proposed laws may also have a greater  negative  impact on the
market for lower quality  securities.  Sovereign debt of foreign  governments is
generally  rated by  country.  Because  these  ratings do not take into  account
individual factors relevant to each issue and may not be updated regularly,  the
Manager may elect to treat such securities as unrated debt.

     The fund will not  purchase  securities  rated lower than B by both Moody's
and S&P unless,  immediately after such purchase,  no more than 10% of its total
assets are invested in such securities.

ZERO-COUPON, STEP-COUPON AND PAY-IN-KIND SECURITIES

     The fund may invest in zero-coupon, step-coupon and pay-in-kind securities.
These  securities  are debt  securities  that do not make regular cash  interest
payments.  Zero-coupon and step-coupon securities are sold at a deep discount to
their face value.  Pay-in-kind  securities pay interest  through the issuance of
additional  securities.  Because such securities do not pay current cash income,
the price of these  securities  can be volatile when interest  rates  fluctuate.
While these  securities do not pay current cash income,  federal  income tax law
requires the holders of zero-coupon,  step-coupon and pay-in-kind  securities to
include in income each year the portion of the original issue discount and other
noncash income on such securities accrued during that year. In order to continue
to qualify for treatment as a "regulated  investment company" under the Internal
Revenue Code and avoid  certain  excise tax, the fund may be required to dispose
of other  portfolio  securities,  which may occur in periods  of adverse  market
prices, in order to generate cash to meet these distribution  requirements.  For
further information about taxes, see "TAXES" on page 21.

CONVERTIBLE SECURITIES

     Convertible securities are fixed-income securities that may be converted at
either a stated  price or stated rate into  underlying  shares of common  stock.
Convertible securities have general characteristics similar to both fixed-income
and  equity  securities.  Although  to a lesser  extent  than with  fixed-income
securities  generally,  the  market  value of  convertible  securities  tends to
decline as  interest  rates  increase  and,  conversely,  tends to  increase  as
interest rates decline.  In addition,  because of the  conversion  feature,  the
market value of convertible  securities  tends to vary with  fluctuations in the
market value of the underlying common stocks and, therefore,  also will react to
variations  in the general  market for equity  securities.  A unique  feature of
convertible  securities  is that as the market  price of the  underlying  common
stock 

                                                                          Page 8

declines,  convertible  securities tend to trade  increasingly on a yield basis,
and so may not  experience  market  value  declines  to the same  extent  as the
underlying  common stock.  When the market price of the underlying  common stock
increases, the prices of the convertible securities tend to rise as a reflection
of the value of the underlying common stock. While no securities investments are
without risk,  investments in convertible  securities generally entail less risk
than investments in common stock of the same issuer.

FOREIGN SECURITIES

     The fund may invest in the securities of foreign issuers, including foreign
governments,  when these securities meet its standards of selection.  Securities
of foreign issuers may trade in the U.S. or foreign securities markets.

     Investments  in foreign  securities may present  certain  risks,  including
those resulting from fluctuations in currency  exchange rates,  future political
and economic developments, reduced availability of public information concerning
issuers,  and the fact that foreign issuers are not generally subject to uniform
accounting,  auditing and financial  reporting  standards or to other regulatory
practices and requirements comparable to those applicable to domestic issuers.

     Because  most foreign  securities  are  denominated  in  non-United  States
currencies,  the investment performance of the fund could be affected by changes
in foreign currency  exchange rates. The value of the fund's assets  denominated
in foreign  currencies  will increase or decrease in response to fluctuations in
the value of those  foreign  currencies  relative to the United  States  dollar.
Currency  exchange  rates can be  volatile  at times in  response  to supply and
demand in the currency  exchange  markets,  international  balances of payments,
governmental  intervention,   speculation,  and  other  political  and  economic
conditions.

     The fund may  purchase  and sell  foreign  currency on a spot basis and hay
engage in forward currency contracts,  currency options and futures transactions
for hedging or any other lawful purpose. (See "Derivative  Securities",  on page
11)

     The fund may  invest up to 40% of its total  assets  in the  securities  of
foreign issuers.

LOAN INTERESTS

     The fund may invest a portion of its  assets in loan  interests,  which are
interests  in amounts  owed by a corporate,  governmental  or other  borrower to
lenders or lending  syndicates.  Loan interests purchased by the fund may have a
maturity of any number of days or years,  and may be acquired from United States
and foreign banks,  insurance  companies,  finance  companies or other financial
institutions  that have made loans or are members of a lending syndicate or from
the holders of loan interests.  Loan interests  involve the risk of loss in case
of default or  bankruptcy  of the  borrower  and,  in the case of  participation
interests,  involve  a risk of  insolvency  of the agent  lending  bank or other
financial  intermediary.  Loan interests are not rated by any NRSROs and are, at
present,  not readily marketable and may be subject to contractual  restrictions
on resale.

MONEY MARKET INSTRUMENTS

     As noted,  the fund may invest in the  following  short-term  money  market
     instruments: 

                                                                          Page 9

     (1)  Securities  issued  or  guaranteed  by the  U.S.  government  and  its
          agencies and instrumentalities;

     (2)  Commercial Paper;

     (3)  Certificates of Deposit and Euro Dollar Certificates of Deposit;

     (4)  Bankers' Acceptances;

     (5)  Short-term notes, bonds, debentures, or other debt instruments; and

     (6)  Repurchase agreements.

     The fund may invest up to 20% of its assets,  and for  temporary  defensive
purposes as  determined  by the manager,  up to 100% of its assets in short-term
money market instruments

UNITED STATES GOVERNMENT SECURITIES

     The government  securities in which the fund may invest include: (1) direct
obligations of the United States, such as Treasury bills, notes and bonds, which
are  supported  by the full  faith and  credit  of the  United  States,  and (2)
obligations  (including  mortgage-related  securities)  issued or  guaranteed by
agencies  and  instrumentalities  of  the  United  States  government  that  are
established  under an act of Congress.  The securities of some of these agencies
and instrumentalities, such as the Government National Mortgage Association, are
guaranteed  as to  principal  and  interest  by the  U.S.  Treasury,  and  other
securities  are  supported by the right of the issuer,  such as the Federal Home
Loan Banks,  to borrow from the Treasury.  Other  obligations,  including  those
issued by the Federal  National  Mortgage  Association and the Federal Home Loan
Mortgage Corporation, are supported only by the credit of the instrumentality.

FUNDAMENTALS OF FIXED INCOME INVESTING

     Over  time,  the  level of  interest  rates  available  in the  marketplace
changes. As prevailing rates fall, the prices of bonds and other securities that
trade on a yield basis rise. On the other hand, when  prevailing  interest rates
rise, bond prices fall.

     Generally, the longer the maturity of a debt security, the higher its yield
and the greater its price volatility.  Conversely, the shorter the maturity, the
lower the yield but the greater the price stability.

     These factors  operating in the  marketplace  have a similar impact on bond
portfolios.  A change in the level of interest  rates causes the net asset value
per share of any bond fund,  except money market funds, to change.  If sustained
over time, it would also have the impact of raising or lowering the yield of the
fund.

     In addition to the risk arising from fluctuating interest rate levels, debt
securities  are  subject to credit  risk.  When a  security  is  purchased,  its
anticipated  yield is  dependent  on the timely  payment by the borrower of each
interest and principal installment.

     Credit  analysis and resultant  bond ratings take into account the relative
likelihood that such timely payment will occur. As a result,  lower-rated bonds,
such as those in which the fund  invests,  tend to sell at higher  yield  levels
than top-rated bonds of similar maturity.

Authorized Credit Quality Range
             A-1                A-2       A-3

                                                                         Page 10

             P-1                P-2       P-3
           MIG-1              MIG-2     MIG-3
            SP-1               SP-2      SP-2
   AAA        AA        A       BBB        BB      B     CCC    CC    C     D
- --------------------------------------------------------------------------------
*****     *****     *****    #####      #####    #####  ##### ***** ***** *****
- --------------------------------------------------------------------------------

     *    Denotes authorized quality

     #    Denotes  expected quality range of at least 80% of total assets of the
          fund

     In addition, as economic, political and business developments unfold, these
lower-quality  bonds,  which possess  lower levels of protection  with regard to
timely payment,  usually exhibit more price  fluctuation than do  higher-quality
bonds of like maturity.

     The investment practices of the fund take into account these relationships.
The intermediate- to long-term  maturity and the lower asset quality of the fund
have  implications  for the degree of price volatility and the yield level to be
expected from an investment in the fund. Investors should be aware that the fund
has higher price volatility potential and higher yield potential than funds that
invest in higher-quality debt securities.

OTHER INVESTMENT PRACTICES, THEIR CHARACTERISTICS AND RISKS

     For additional information, see "Additional Investment Restrictions" in 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  objectives.
The manager  believes that the rate of portfolio  turnover is irrelevant when it
determines a change is in order to achieve those objectives and accordingly, the
annual portfolio turnover rate cannot be anticipated.

     The  portfolio  turnover of the fund may be higher than other  mutual funds
with   similar   investment   objectives.   Higher   turnover   would   generate
correspondingly  greater  brokerage  commissions,  which is a cost that the fund
pays  directly.  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.

DERIVATIVE SECURITIES

     To the extent permitted by its investment objectives and policies, the fund
may  invest  in  securities  that  are  commonly  referred  to  as  "derivative"
securities.  Generally,  a derivative is a financial  arrangement,  the value of
which is based on, or "derived" from, a traditional  security,  asset, or market
index.   Certain  derivative   securities  are  more  accurately   described  as
"index/structured"   securities.   Index/structured  securities  are  derivative
securities whose value or performance is linked to other equity securities (such
as depositary receipts),  currencies, interest rates, indices or other financial
indicators ("reference indices").

                                                                         Page 11

     Some  "derivatives"  such  as   mortgage-related   and  other  asset-backed
securities are in many respects like any other investment,  although they may be
more volatile or less liquid than more traditional debt securities.

     There are many different  types of  derivatives  and many different ways to
use them. Futures and options are commonly used for traditional hedging purposes
to  attempt  to protect  the fund from  exposure  to  changing  interest  rates,
securities  prices, or currency exchange rates and for cash management  purposes
as a low-cost  method of gaining  exposure  to a  particular  securities  market
without investing directly in those securities.

     The fund may invest in a derivative  security unless the reference index or
the  instrument to which it relates is an eligible  investment for the fund. For
example,  a bond  whose  interest  rate is  indexed  to the  return on  two-year
treasury  securities  would be a permissible  investment  (assuming it otherwise
meets the other  requirements for the funds),  while a security whose underlying
value is linked to the price of oil would not be a permissible  investment since
the funds may not invest in oil and gas leases or futures.

     The return on a derivative  security  may  increase or decrease,  depending
upon changes in the reference index or instrument to which it relates.

     There  are  a  range  of  risks  associated  with  derivative  investments,
including:

*    the risk that the underlying security, interest rate, market index or other
     financial  asset  will  not move in the  direction  the  portfolio  manager
     anticipates;

*    the  possibility  that  there may be no  liquid  secondary  market,  or the
     possibility that price  fluctuation  limits may be imposed by the exchange,
     either of which may make it difficult or impossible to close out a position
     when desired;

*    the risk that adverse price movements in an instrument can result in a loss
     substantially greater than the fund's initial investment; and

*    the risk that the counterparty will fail to perform its obligations.

     The  Board  of  Directors  has  approved  the  manager's  policy  regarding
investments in derivative securities. That policy specifies factors that must be
considered in connection  with a purchase of derivative  securities.  The policy
also establishes a committee that must review certain proposed  purchases before
the  purchases  can be  made.  The  manager  will  report  on fund  activity  in
derivative securities to the Board of Directors as necessary.  In addition,  the
Board will review the manager's policy for investments in derivative  securities
annually.

COVERED CALL OPTIONS

     The fund may write  call  options on  securities.  The fund  realizes  fees
(referred to as "premiums") for granting the rights evidenced by the options.  A
call  option  embodies  the right of its  purchaser  to compel the writer of the
option to sell to the option holder an underlying  security at a specified price
at any time  during the option  period.  Thus,  the  purchaser  of a call option
written  by the fund  has the  right to  purchase  from the fund the  underlying
security owned by the fund at the agreed-upon price for a specified time period.

     Upon the exercise of a call option written by the fund, the fund may suffer
a loss equal to the  excess of the  security's  market  value at the time of the
option  exercise  over the fund's  acquisition  cost of the  security,  less the
premium received for writing the option.

                                                                         Page 12

     The fund will write only covered  options.  Accordingly,  whenever the fund
writes a call  option,  it will  continue  to own or have the  present  right to
acquire  the  underlying  security  for as long as it remains  obligated  as the
writer of the option.

     The fund may engage in a closing  purchase  transaction to realize a profit
or to  unfreeze  an  underlying  security  (thereby  permitting  its sale or the
writing  of a new  option  on the  security  prior to the  outstanding  option's
expiration). To effect a closing purchase transaction,  the fund would purchase,
prior to the holder's  exercise of an option the fund has written,  an option of
the same series as that on which the fund desires to terminate  its  obligation.
The obligation of the fund under an option it has written would be terminated by
a  closing  purchase  transaction,  but the fund  would  not be deemed to own an
option as the result of the transaction. There can be no assurance the fund will
be able to effect closing  purchase  transactions at a time when it wishes to do
so. To facilitate closing purchase  transactions,  however,  the fund ordinarily
will  write  options  only if a  secondary  market for the  options  exists on a
domestic securities exchange or in the over-the-counter market.

PORTFOLIO LENDING

     In order to  realize  additional  income,  the fund may lend its  portfolio
securities  to  persons  not  affiliated  with  it  and  who  are  deemed  to be
creditworthy.  Such  loans  must be  secured  continuously  by  cash  collateral
maintained on a current basis in an amount at least equal to the market value of
the securities loaned, or by irrevocable letters of credit. During the existence
of the loan,  the fund must  continue to receive the  equivalent of the interest
and dividends  paid by the issuer on the  securities  loaned and interest on the
investment of the collateral.  The fund must have the right to call the loan and
obtain the  securities  loaned at any time on five days' notice,  including,  if
applicable,  the  right  to  call  the  loan to  enable  the  fund  to vote  the
securities.

     Loans may not exceed 33 1/3% of the fund's  total  assets  taken at market.
Interest on loaned  securities  may not exceed 10% of the annual gross income of
the fund (without offset for realized capital gains).

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 that 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 interest-bearing  obligation  purchased  constitutes security for
the  repurchase  obligation,  a repurchase  agreement  can be  considered a loan
collateralized 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 

                                                                         Page 13

be delayed or limited.  To the extent the value of the security  decreases,  the
fund could experience a loss.

     The fund will limit repurchase agreement  transactions to securities issued
by the United States government,  its agencies and  instrumentalities,  and will
enter into such  transactions  with those banks and  securities  dealers who are
deemed  creditworthy  pursuant  to  criteria  adopted  by the  funds'  Board  of
Directors.

     The fund may invest in repurchase  agreements  with respect to any security
in which the fund is authorized to invest, even if the remaining maturity of the
underlying  security  would make that  security  ineligible  for purchase by the
fund.

WHEN-ISSUED SECURITIES

     The fund may  sometimes  purchase new issues of securities on a when-issued
basis without the limit when, in the opinion of the manager, such purchases will
further  the  investment  objectives  of the  fund.  The  price  of  when-issued
securities is established at the time  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 when-issued
security. Accordingly, the value of each security may decline prior to delivery,
which  could  result  in a loss to the fund.  A  separate  account  for the fund
consisting of cash or high-quality  liquid debt securities in an amount at least
equal to the when-issued commitments will be established and maintained with the
custodian. No income will accrue to the fund prior to delivery.

RULE 144A SECURITIES

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

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

     Since the  secondary  market  for such  securities  is  limited  to certain
qualified  institutional  investors,  the  liquidity of such  securities  may be
limited  accordingly  and the fund  may,  from  time to time,  hold a Rule  144A
security that is illiquid.  In such an event,  the fund's  manager will consider
appropriate remedies to minimize the effect on the fund's liquidity.

                                                                         Page 14

     The fund may not invest more than 15% of its assets in illiquid  securities
(securities  that may not be sold within seven days at  approximately  the price
used in determining the net asset value of fund shares).

INTEREST RATE FUTURES CONTRACTS AND OPTIONS THEREON

     The fund may buy and sell interest rate futures contracts  relating to debt
securities ("debt futures," i.e., futures relating to debt securities, and "bond
index futures," i.e.,  futures  relating to indexes on types or groups of bonds)
and  write  and buy put and call  options  relating  to  interest  rate  futures
contracts.

     For  options  sold,  the fund  will  segregate  cash or  high-quality  debt
securities  equal to the value of  securities  underlying  the option unless the
option is otherwise covered.

     The fund will  deposit in a  segregated  account  with its  custodian  bank
appropriate  debt  obligations  or equity  securities  in an amount equal to the
fluctuating  market value of long futures  contracts it has purchased,  less any
margin  deposited  on its long  position.  It may hold cash or acquire such debt
obligations for the purpose of making these deposits.

     The fund will purchase or sell futures  contracts and options  thereon only
for the purpose of hedging  against changes in the market value of its portfolio
securities  or  changes in the market  value of  securities  that it may wish to
include  in  its  portfolio.   The  fund  will  enter  into  future  and  option
transactions only to the extent that the sum of the amount of margin deposits on
its existing  futures  positions  and premiums  paid for related  options do not
exceed 5% of its assets.

     Since futures contracts and options thereon can replicate  movements in the
cash markets for the securities in which the fund invests without the large cash
investments  required for dealing in such markets,  they may subject the fund to
greater and more volatile risks than might  otherwise be the case. The principal
risks related to the use of such instruments are (1) the offsetting  correlation
between  movements in the market  price of the  portfolio  investments  (held or
intended) being hedged and in the price of the futures contract or option may be
imperfect;  (2)  possible  lack of a liquid  secondary  market for  closing  out
futures or option positions;  (3) the need for additional  portfolio  management
skills  and  techniques;  and  (4)  losses  due to  unanticipated  market  price
movements.  For a hedge to be  completely  effective,  the  price  change of the
hedging instrument should equal the price change of the securities being hedged.
Such  equal  price  changes  are not  always  possible  because  the  investment
underlying the hedging  instrument may not be the same  investment that is being
hedged.

     The manager will attempt to create a closely  correlated  hedge but hedging
activity  may  not  be  completely   successful  in  eliminating   market  value
fluctuation.  The  ordinary  spreads  between  prices  in the cash  and  futures
markets,  due to the differences in the natures of those markets, are subject to
distortion.  Due to the possibility of distortion, a correct forecast of general
interest  rate  trends  by the  manager  may still  not  result in a  successful
transaction.  The manager may be incorrect in its  expectations as to the extent
of various  interest rate  movements or the time span within which the movements
take place.

                                                                         Page 15

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 and yield.
Performance  data may be quoted  separately  for the  Advisor  Class and for the
other class.

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

     A  quotation  of yield  reflects  the fund's  income  over a stated  period
expressed as a percentage  of 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.

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

     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 the Bank Rate
Monitor  National Index of 2 1/2 -year CD rates.  Fund  performance  may also be
compared,  on a relative basis, to 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.

                                                                         Page 16

                 HOW TO INVEST WITH AMERICAN CENTURY INVESTMENTS

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

HOW TO PURCHASE AND SELL AMERICAN CENTURY FUNDS

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

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

     If you are purchasing through a financial intermediary,  you should contact
your service  representative at the financial intermediary for information about
an American Century fund.

     If you have questions about a fund, see "Investment  Policies Of The Fund,"
page  7,  or  call  one  of  our   Institutional   Service   Representative   at
1-800-345-3533.

     Orders to purchase shares are effective on the day we receive payment.  See
"WHEN SHARE PRICE IS DETERMINED," page 19.

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

HOW TO EXCHANGE FROM ONE AMERICAN CENTURY FUND TO ANOTHER

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

HOW TO REDEEM SHARES

     Subject to any  restrictions  imposed by your  employer's plan or financial
intermediary's  program, you can sell ("redeem") your shares through the plan or
financial  intermediary  at their net  asset  value.  Your  plan  administrator,
trustee,  or financial  intermediary or other designated  person must provide us
with redemption instructions. The shares will be redeemed at the net asset value
next computed after receipt of the  instructions in good order.  See "When Share
Price Is  Determined,"  page 16. If you have any questions  about how to redeem,
contact  your  plan   administrator,   employee   benefits  office,  or  service
representative at your financial intermediary, as applicable.

                                                                         Page 17

TELEPHONE SERVICES

INVESTORS LINE

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

                                                                         Page 18

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

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

     Investments  are  considered  received only when payment is received by us.
Wired funds are  considered  received on the day they are  deposited in our bank
account if they are deposited before the close of business on the Exchange.

     Investments by telephone pursuant to your prior authorization to us to draw
on your bank account are considered received at the time of your telephone call.
Investment and  transaction  instructions  received by us on any business day by
mail  prior to the time as of  which  the net  asset  value is  determined,  are
effective on, and will receive the price determined,  that day.  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  request 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 funds'  procedures or any contractual  arrangement  with the
funds or the funds' 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:  The portfolio  securities of the fund,  except as otherwise  noted,
listed or traded on a domestic  securities  exchange are valued at the last sale
price  on that  exchange.  Portfolio  securities  primarily  traded  on  foreign
securities  exchanges 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

                                                                         Page 19

available, securities and other assets are valued at fair value as determined in
accordance with procedures adopted by the Board of Directors.

     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 Directors.

     The value of an  exchange-traded  foreign  security  is  determined  in its
national currency as of the close of trading on the foreign exchange on which it
is traded or as of the close of business on the New York Stock Exchange, if that
is earlier.  That value is then converted to dollars at the  prevailing  foreign
exchange rate.

     Trading in securities on European and Far Eastern securities  exchanges and
over-the-counter markets is normally completed at various times before the close
of  business on each day that the New York Stock  Exchange is open.  If an event
were to occur after the value of a security was  established  but before the net
asset value per share was  determined  that was likely to materially  change the
net asset value,  then that security would be valued at fair value as determined
in accordance with procedures adopted by the Board of Directors.

     Trading of these  securities in foreign markets may not take place on every
New York Stock  Exchange  business  day. In addition,  trading may take place in
various  foreign  markets on  Saturdays or on other days when the New York Stock
Exchange is not open and on which the fund's net asset value is not  calculated.
Therefore,  such  calculation  does not take  place  contemporaneously  with the
determination  of the prices of many of the  portfolio  securities  used in such
calculation  and the value of the fund's  portfolio may be affected on days when
shares of the fund may not be purchased or redeemed.

WHERE TO FIND INFORMATION ABOUT SHARE PRICE

     The net  asset  value of the  Investor  Class of the fund  offered  by this
Prospectus is published in leading  newspapers daily.  Because the total expense
ratio for the Advisor  Class  shares is 0.25%  higher than the  Investor  Class,
their net asset  values  will be lower than the  Investor  Class.  The net asset
values of the Advisor Class may be obtained by calling us.

DISTRIBUTIONS

     At the close of each day, including  Saturdays,  Sundays and holidays,  net
income  of  the  fund  is  determined  and  declared  as  a  distribution.   The
distribution  will be paid  monthly on the last Friday of each month  except for
year-end distributions, which will be paid on the last business day of the year.

     You will  begin to  participate  in the  distributions  the day after  your
purchase is  effective.  See "When Share Price is  Determined,"  page 19. 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  securities  gains, if any,  generally are
declared and paid once a year,  but the funds may make  distributions  on a more
frequent  basis to 

                                                                         Page 20

comply with the  distribution  requirements  of the  Internal  Revenue  Code and
Regulations,  in all events in a manner  consistent  with the  provisions of the
Investment Company 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  59 1/2  years  old or
permanently and totally disabled. Distribution checks normally are mailed within
seven days after the record date. Please consult our Investor Services Guide for
further information regarding your distribution options.

TAXES

     The fund has elected to be taxed under Subchapter M of the Internal Revenue
Code,  which means that to the extent its income is distributed to shareholders,
it pays no income 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 funds 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
fixed income funds do not qualify for the 70%  dividends-received  deduction for
corporations since they are derived from interest income. Distributions from net
long-term capital gains are taxable as long-term capital gains regardless of the
length of time the shares on which such distributions are paid have been held by
the shareholder.  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.

     Distributions  are taxable to you  regardless  of whether they are taken in
cash or reinvested,  even if the value of your shares is below your cost. If you
purchase shares shortly before a distribution,  you must pay income taxes on the
distribution,  even though the value of your investment (plus cash received,  if
any) will not have  increased.  In  addition,  the  share  price at the time you
purchase  shares may  include  unrealized  

                                                                         Page 21

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 the fund pays  distributions to its  shareholders.  You should consult your
tax advisor about the tax status of such distributions in your own state.

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

MANAGEMENT

INVESTMENT MANAGEMENT

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

                                                                         Page 22

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

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

     Norman E. Hoops,  Senior Vice President and Fixed Income Portfolio Manager,
joined  American  Century as Vice  President and  Portfolio  Manager in November
1989. In April 1993, he became Senior Vice President. He is also a member of the
team that manages Limited-Term Bond, Intermediate-Term Bond, Benham Bond and the
fixed income portion of Balanced and the Strategic Allocation Funds.

     Theresa Fennell,  Portfolio Manager,  joined American Century in June 1997.
Prior to joining American Century,  she was an Assistant  Portfolio Manager with
Smith Barney Mutual Funds Management, Inc.

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

     For the  services  provided to the Advisor  Class of the fund,  the manager
receives  an annual  fee at the rate of 0.65% of the  average  net assets of the
fund.

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

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 portfolios
obtain  preclearance before executing personal trades. With respect to Portfolio
Managers  and  other  investment   personnel,   the  Code  of  Ethics  prohibits
acquisition  of securities  in an initial  public  offering,  as well as profits
derived from the purchase and sale of the same security within 60 calendar days.
These provisions are designed to ensure that the interests of fund  shareholders
come before the interests of the people who manage the fund.

TRANSFER AND ADMINISTRATIVE SERVICES

     American  Century  Services  Corporation,  4500 Main  Street,  Kansas City,
Missouri,  64111, acts as transfer agent and dividend-paying agent for the fund.
It provides  

                                                                         Page 23

facilities,  equipment  and personnel to the funds and is paid for such services
by the manager.

     Certain  recordkeeping and administrative  services that would otherwise be
performed  by the transfer  agent may be  performed  by an insurance  company or
other  entity  providing  similar  services for various  retirement  plans using
shares  of the  funds as a  funding  medium,  by  broker-dealers  and  financial
advisors  for their  customers  investing  in shares of  American  Century or by
sponsors of multi mutual fund no- or low-transaction  fee programs.  The manager
or an affiliate may enter into contracts to pay them for such  recordkeeping and
administrative services out of its unified management fee.

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

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

     The manager and transfer  agent are both wholly  owned by American  Century
Companies, Inc. James E. Stowers Jr., Chairman of the funds' Board of Directors,
controls  American Century Companies 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., a registered  broker-dealer and an affiliate of the manager.  As agent for
the fund and the manager,  the  distributor  enters into  contracts with various
banks,  broker-dealers,  insurance companies and other financial  intermediaries
with  respect  to the sale of the  fund's  shares  and/or  the use of the fund's
shares in various  financial  services.  The manager (or an affiliate)  pays all
expenses incurred in promoting sales of, and distributing, the Advisor Class and
in securing  such  services out of the Rule 12b-1 fees  described in the section
that follows.

SERVICE AND DISTRIBUTION FEES

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

                                                                         Page 24

annum of the average daily net assets of the shares of the fund's Advisor Class.
The  shareholder  services  fee is paid for the  purpose  of paying the costs of
securing certain shareholder and administrative  services,  and the distribution
fee  is  paid  for  the  purpose  of  paying  the  costs  of  providing  various
distribution  services. All or a portion of such fees are paid by the manager to
the banks, broker-dealers, insurance companies or other financial intermediaries
through which such shares are made available.

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

FURTHER INFORMATION ABOUT AMERICAN CENTURY

     American Century Mutual Funds,  Inc., the issuer of the fund, was organized
as a Maryland corporation on July 2, 1990. The corporation  commenced operations
on February 28, 1991, the date it merged with Twentieth Century Investors, Inc.,
a Delaware  corporation which had been in business since October 1958.  Pursuant
to the  terms of the  Agreement  and Plan of Merger  dated  July 27,  1990,  the
Maryland  corporation was the surviving entity and continued the business of the
Delaware corporation with the same officers and directors, the same shareholders
and the same investment objectives, policies and restrictions.

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

     American  Century  Mutual  Funds,  Inc.  issues 18 series of $.01 par value
shares.  Each series is commonly  referred to as a fund. The assets belonging to
each series of shares are held separately by the custodian.

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

     Except as described  below,  all classes of shares of a fund have identical
voting,  dividend,   liquidation  and  other  rights,  preferences,   terms  and
conditions.  The only  differences  among the various classes are (a) each class
may be subject to different  expenses specific to that class, (b) each class has
a different identifying designation or 

                                                                         Page 25

name, (c) each class has exclusive  voting rights with respect to matters solely
affecting such class and (d) each class may have different exchange privileges.

     Each share,  irrespective  of series or class,  is entitled to one vote for
each dollar of net asset value applicable to such share on all questions, except
those matters which must be voted on separately by the series or class of shares
affected. Matters affecting only one series or class are voted upon only by that
series.  Shares have non-cumulative  voting rights, which means that the holders
of more than 50% of the votes cast in an election of directors  can elect all of
the  directors  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
Directors.

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

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

                                                                         Page 26
<PAGE>
                       STATEMENT OF ADDITIONAL INFORMATION

                             [american century logo]
                                    American
                                   Century(sm)

                                  MARCH 1, 1997
                       AMERICAN CENTURY MUTUAL FUNDS, INC.


                                  [FRONT COVER]



                       STATEMENT OF ADDITIONAL INFORMATION

                               SEPTEMBER 30, 1997


                       AMERICAN CENTURY MUTUAL FUNDS, INC.


         This  statement is not a prospectus  but should be read in  conjunction
with those American Century prospectuses dated September 30, 1997. Please retain
this  document  for future  reference.  To obtain a  prospectus,  call  American
Century  toll-free at 1-800-345-2021  (international  calls:  816-531-5575),  or
write to P.O. Box 419200, Kansas City, Missouri 64141-6200.



TABLE OF CONTENTS

Investment Objectives Of The Funds.............................................3
Fundamental Policies Of The Funds..............................................3
Additional Investment Restrictions.............................................7
Forward Currency Exchange Contracts............................................9
An Explanation Of Fixed Income Securities Ratings.............................11
Short Sales...................................................................13
Portfolio Turnover............................................................13
Interest Rate Futures Contracts And Related Options...........................14
Municipal Leases..............................................................19
Officers And Directors........................................................20
Management....................................................................23
Custodians....................................................................25
Independent Accountants.......................................................26
Capital Stock.................................................................26
Multiple Class Structure......................................................27
Brokerage.....................................................................30
Performance Advertising.......................................................31
Redemptions In Kind...........................................................35
Holidays......................................................................35
Financial Statements..........................................................35



INVESTMENT OBJECTIVES OF THE FUNDS

         The  investment  objective  of each fund  comprising  American  Century
Mutual  Funds,  Inc. is described on page 2 of the  applicable  prospectus.  One
feature of the various series of shares (funds) merits further  explanation.  As
described in the Growth Funds Prospectus,  the chief investment difference among
Growth,  Ultra and Vista,  and between  Select and Heritage,  is the size of the
fund,  which affects the nature of the  investments in the fund's  portfolio.  A
smaller  fund  tends  to be more  responsive  to  changes  in the  value  of its
portfolio  securities.  For example,  if a $1,000,000  fund buys $5,000 of stock
which then doubles in value, the value of the fund increases by only one-half of
1%. However,  if a $100,000 fund buys $5,000 of such stock which then doubles in
value, the value of the fund increases by 5%, or at a rate 10 times as great. By
the same token, if the value of such stock declines by one-half,  the small fund
would decline in value by 2.5%,  while the larger fund would decline in value by
only  one-half of 1% or at a rate only  one-tenth  as great.  Thus, a small fund
with the same objective as a large fund, and similarly managed, likely will have
a greater potential for profit and for loss as well.

FUNDAMENTAL POLICIES OF THE FUNDS

         In achieving its objective,  a fund must conform to certain fundamental
policies that may not be changed without shareholder approval, as follows:

SELECT,  HERITAGE,  GROWTH,  ULTRA, VISTA,  GIFTRUST,  NEW OPPORTUNITIES AND THE
EQUITY INVESTMENTS OF BALANCED

         In general,  within the restrictions outlined herein,  American Century
has broad  powers with respect to  investing  funds or holding them  uninvested.
Investments are varied according to what is judged  advantageous  under changing
economic  conditions.  It  is  our  policy  to  retain  maximum  flexibility  in
management without restrictive provisions as to the proportion of one or another
class of  securities  that may be held  subject to the  investment  restrictions
described  below.  It is the manager's  intention that each of these  portfolios
will  generally  consist of common stocks.  However,  the manager may invest the
assets of each  series in  varying  amounts in other  instruments  and in senior
securities, such as bonds, debentures,  preferred stocks and convertible issues,
when such a course is  deemed  appropriate  in order to  attempt  to attain  its
financial objective.  Senior securities that, in the opinion of the manager, are
high-grade issues may also be purchased for defensive purposes. [Note: The above
statement of fundamental  policy gives American  Century  authority to invest in
securities other than common stocks and traditional debt and convertible issues.
Though the funds have not made such  investments  in the past,  the  manager may
invest in master limited  partnerships (other than real estate partnerships) and
royalty  trusts  which  are  traded  on  domestic  stock   exchanges  when  such
investments are deemed  appropriate for the attainment of the funds'  investment
objectives.]

                                                                          Page 3

BALANCED

         The manager will invest  approximately 60% of the Balanced portfolio in
common  stocks  and  the  balance  in  fixed  income  securities.  Common  stock
investments are described above. At least 80% of the fixed income assets will be
invested in  securities  that are rated at the time of purchase by a  nationally
recognized  statistical  rating  organization  to be within  the  three  highest
categories.  The fund may invest in securities  of the United States  government
and  its  agencies  and  instrumentalities,   corporate,  sovereign  government,
municipal,  mortgage-backed,  and  other  asset-backed  securities.  It  can  be
expected  that  management  will invest from time to time in bonds and preferred
stock convertible into common stock.

CASH RESERVE

         The manager will invest the Cash Reserve  portfolio in debt  securities
payable in United States currency.  Such securities may be obligations issued or
guaranteed by the United States government or its agencies and instrumentalities
or  obligations  issued  by  corporations  and  others,   including   repurchase
agreements,  of such quality and with such  maturities to permit Cash Reserve to
be  designated  as a money  market  fund and to enable it to  maintain  a stable
offering price per share.

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

SHORT-TERM GOVERNMENT FUND AND INTERMEDIATE-TERM GOVERNMENT FUND

         The manager will invest the  portfolios of Short-Term  Government  Fund
and  Intermediate-Term  Government  Fund in  direct  obligations  of the  United
States,  such as Treasury bills,  Treasury notes and U.S. government bonds, that
are supported by the full faith and credit of the United States. The manager may
also invest in agencies and  instrumentalities  of the United States  government
that are established  under the authority of an act of Congress.  The securities
of some of such agencies and  instrumentalities  are supported by the full faith
and credit of the United States  Treasury;  others are supported by the right of
the issuer to borrow from the Treasury;  still others are supported  only by the
credit of the instrumentality.  Such agencies and 

                                                                          Page 4

instrumentalities  include,  but are not  limited  to, the  Government  National
Mortgage Association,  Federal National Mortgage Association,  Federal Home Loan
Mortgage Corporation,  Student Loan Marketing  Association,  Federal Farm Credit
Banks, Federal Home Loan Banks, and Resolution Funding Corporation.  Purchase of
such  securities may be made outright or on a when-issued  basis and may be made
subject to repurchase agreements.

LIMITED-TERM BOND, INTERMEDIATE-TERM BOND AND BENHAM BOND

         The manager will invest the  portfolios of the corporate  bond funds in
high- and medium-grade  debt securities  payable in United States currency.  The
funds may invest in  securities  that,  at the time of purchase,  are rated by a
nationally  recognized  statistical rating organization or, if not rated, are of
equivalent  investment  quality as  determined  by the  management,  as follows:
short-term  notes  within  the  two  highest  categories;  corporate,  sovereign
government and municipal bonds within the four highest categories; securities of
the United States government and its agencies and  instrumentalities;  and other
types of  securities  rated at least P-2 by Moody's or A-2 by S&P. The funds may
also  purchase  securities  under  repurchase  agreements  as  described  in the
prospectus  and purchase and sell  interest  rate futures  contracts and related
options. See "Interest Rate Futures Contracts and Related Options," page 9.

HIGH YIELD

         The manager will invest the  portfolio of cash reserve in a diversified
portfolio of high-yielding corporate bonds, debentures and notes. The fund seeks
current income as a primary  objective and capital  appreciation  as a secondary
objective. The fund invests primarily in lower-rated bonds, which are subject to
greater credit risk and  consequently  offer higher yield than investment  grade
bonds. The securities purchased by the fund include notes, corporate,  sovereign
government  and  municipal  bonds  in any  rating  category.  The  fund may also
purchase  convertible  and  preferred  securities in any amount and purchase and
sell interest rate futures  contracts and related  options.  See "Interest  Rate
Futures Contracts and Related Options," page 9.

         As fixed-income  securities,  convertible  securities in which the fund
may invest are  investments  which  provide  for a stable  stream of income with
generally  higher yields than common stocks.  Of course,  like all  fixed-income
securities,  there can be no assurance of current  income because the issuers of
the  convertible  securities  may  default  on  their  obligations.  Convertible
securities,  however,  generally  offer lower  interest or dividend  yields than
non-convertible  securities  of similar  quality  because of the  potential  for
capital  appreciation.  A convertible  security,  in addition to providing fixed
income,  offers the potential for capital  appreciation  through the  conversion
feature,  which enables the holder to benefit from increases in the market price
of the underlying  common stock.  However,  there can be no assurance of capital
appreciation because securities prices fluctuate.

         Convertible  securities generally are subordinated to other similar but
non-convertible  securities of the same issuer,  although  convertible bonds, as
corporate debt  obligations,  enjoy  seniority in right of payment to all equity
securities,  and  convertible  

                                                                          Page 5

preferred  stock is senior to common  stock of the same  issuer.  Because of the
subordination  feature,  however,  convertible  securities  typically have lower
ratings than similar non-convertible securities.

         Unlike a convertible  security which is a single security,  a synthetic
convertible  security is  comprised  of two distinct  securities  that  together
resemble  convertible  securities  in certain  respects.  Synthetic  convertible
securities are created by combining  non-convertible  bonds or preferred  stocks
with  warrants or stock call  options.  The options  that will form  elements of
synthetic  convertible  securities will be listed on a securities exchange or on
the National  Association of Securities Dealers Automated Quotation Systems. The
two components of a synthetic  convertible  security,  which will be issued with
respect to the same  entity,  generally  are not  offered as a unit,  and may be
purchased  and  sold  by the  fund at  different  times.  Synthetic  convertible
securities  differ from convertible  securities in certain  respects,  including
that each component of a synthetic  convertible  security has a separate  market
value and responds  differently to market  fluctuations.  Investing in synthetic
convertible  securities  involves  the risk  normally  involved  in holding  the
securities comprising the synthetic convertible security.

LIMITED-TERM TAX-EXEMPT, INTERMEDIATE-TERM TAX-EXEMPT AND LONG-TERM TAX-EXEMPT

         The  manager  will  invest  the  tax-exempt  portfolios  in  high-  and
medium-grade securities. At least 80% of each fund's net assets will be invested
in securities whose income is not subject to federal income taxes, including the
alternative minimum tax.

         The two principal  classifications  of tax-exempt  securities are notes
and bonds.  Tax-exempt  notes are of short  maturity,  generally less than three
years, and are issued to provide for short-term capital needs. These include tax
anticipation  notes and revenue  anticipation  notes,  among others,  as well as
tax-exempt  commercial  paper.  Tax-exempt  bonds,  which meet long-term capital
needs,  generally  have  maturities  longer than one year. The two categories of
tax-exempt bonds,  general  obligation and revenue,  may be held by the funds in
any proportion.  General  obligation bonds are secured by the issuer's pledge of
its full  faith,  credit  and taxing  power for the  payment  of  principal  and
interest.  Revenue bonds are payable from the revenue  derived from a project or
facility or from the  proceeds of a specific  revenue  source,  but not from the
general taxing power. Industrial development revenue bonds are a type of revenue
bond secured by payments from a private user,  and generally do not enjoy a call
upon the  resources  of the  municipality  that issued the bond on behalf of the
user.

         The funds may invest in fixed-, floating- and variable-rate securities.
Fixed-rate  securities pay interest at the fixed rate until maturity.  Floating-
and  variable-rate  securities  normally have a stated maturity in excess of one
year,  but may have a  provision  permitting  the  holder to demand  payment  of
principal and interest upon not more than seven days' notice.  Floating rates of
interest are tied to a percentage  of a designated  base rate,  such as rates on
Treasury  bills or the prime  rate at a major  bank,  and  change  whenever  the
designated  rate  changes.  Variable-rate  securities  provide  for  a  periodic
adjustment in the rate.

                                                                          Page 6

         For the purpose of determining  the maturity of an individual  security
or the average  weighted  portfolio  maturity  of one of the funds,  the manager
shall consider the maturity to be the shorter of final  maturity,  the remaining
expected  average  life of a sinking  fund  bond,  the  remaining  time  until a
mandatory put date,  the time until payment as the result of exercising a put or
demand-for-payment option, or the remaining time until the pre-refunding payment
date of a security whose  redemption on a call date in advance of final maturity
is assured through  contractual  agreement and with  high-quality  collateral in
escrow.

         The funds may invest in securities  that, at the time of purchase,  are
rated by a nationally  recognized  statistical  rating  organization  or, if not
rated, are of equivalent investment quality as determined by the management,  as
follows:  short-term notes within the two highest  categories,  bonds within the
four highest  categories,  and other types of  securities  rated at least P-2 by
Moody's  or A-2 by S&P.  The funds may invest  more than 25% of their  assets in
industrial  development  revenue bonds. Each of the funds may invest in interest
rate futures contracts and related options. See "Interest Rate Futures Contracts
and Related Options," page 9.

BENHAM BOND, LIMITED-TERM TAX-EXEMPT, INTERMEDIATE-TERM TAX-EXEMPT AND LONG-TERM
TAX-EXEMPT

         Benham Bond, Limited-Term Tax-Exempt,  Intermediate-Term Tax-Exempt and
Long-Term  Tax-Exempt  (the  funds)  may  buy and  sell  interest  rate  futures
contracts relating to debt securities ("debt futures," i.e., futures relating to
debt securities,  and "bond index futures," i.e., futures relating to indexes on
types or groups of bonds)  and write and buy put and call  options  relating  to
interest rate futures  contracts for the purpose of hedging against (i) declines
or possible declines in the market value of debt securities or (ii) inability to
participate  in advances in the market  values of debt  securities at times when
the funds are not fully  invested in long-term debt  securities;  provided that,
the funds may not  purchase  or sell  futures  contracts  or related  options if
immediately  thereafter  the sum of the  amount of margin  deposits  on a fund's
existing futures positions and premiums paid for related options would exceed 5%
of the fund's assets.

ADDITIONAL INVESTMENT RESTRICTIONS As a fundamental policy, each fund shall not:

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

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

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

                                                                          Page 7

         limitations,  or (ii) by engaging in repurchase agreements with respect
         to portfolio securities.

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

5)       concentrate  its  investments  in securities of issuers in a particular
         industry  (other  than  securities  issued  or  guaranteed  by the U.S.
         government or any of its agencies or instrumentalities).

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

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

         (b) [Cash Reserve only]  purchase or sell physical  commodities  unless
         acquired as a result of ownership of securities or other instruments.

8)       invest for purposes of exercising control over management.

9)       [Select and Heritage  only] Eighty percent (80%) of the total assets of
         Select and Heritage must be invested in  securities  of companies  that
         have a record of paying dividends,  or have committed themselves to the
         payment of regular dividends, or otherwise produce income.

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

As an operating policy, each fund:

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

b)       shall not purchase any securities  which would cause 25% or more of the
         value of the fund's total assets at the time of purchase to be invested
         in the  securities of one or more issuers  conducting  their  principal
         business activities in the same industry, provided that (a) there is no
         limitation with respect to obligations issued or guaranteed by the U.S.
         government,  any state,  territory or possession of the United  States,
         the  District  of  Columbia  or any  of  their  authorities,  agencies,
         instrumentalities or political  subdivisions and repurchase  agreements
         secured by such instruments, (b) wholly-owned finance companies will be
         considered to be in the industries of their parents if their activities
         are primarily  related to financing the activities of the parents,  (c)
         utilities  will be divided  according to their  services,  for example,
         gas, gas transmission, electric and gas, electric and telephone will

                                                                          Page 8

         each be  considered a separate  industry,  and (d) personal  credit and
         business credit businesses will be considered separate industries.

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

d)       shall not purchase  any  security or enter into a repurchase  agreement
         if, as a result, more than 15% of its net assets (10% for Cash Reserve)
         would be invested in repurchase  agreements not entitling the holder to
         payment of principal  and interest  within seven days and in securities
         that are  illiquid by virtue of legal or  contractual  restrictions  on
         resale or the absence of a readily available market.

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

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

         The Investment Company Act imposes certain additional restrictions upon
acquisition  by the  corporation  of securities  issued by insurance  companies,
brokers,  dealers,  underwriters or investment  advisers,  and upon transactions
with  affiliated  persons as therein  defined.  It also  defines and forbids the
creation of cross and circular  ownership.  Neither the  Securities and Exchange
Commission  nor any other agency of the federal  government  participates  in or
supervises the corporation's management or its investment practices or policies.

         Neither the SEC nor any other agency of the federal or state government
participates in or supervise the funds' management or their investment practices
or policies.

FORWARD CURRENCY EXCHANGE CONTRACTS

         The funds conduct their foreign currency exchange  transactions  either
on a spot (i.e., cash) basis at the spot rate prevailing in the foreign currency
exchange  market,  or through  entering into forward foreign  currency  exchange
contracts to purchase or sell foreign currencies.

         The funds expect to use forward contracts under two circumstances:

         (1) When the  manager  wishes to "lock in" the U.S.  dollar  price of a
security  when a fund is  purchasing  or  selling a  security  denominated  in a
foreign currency,  the fund would be able to enter into a forward contract to do
so;

         (2) When the manager believes that the currency of a particular foreign
country may suffer a substantial  decline against the U.S.  dollar, a fund would
be able to enter 

                                                                          Page 9

into a forward  contract to sell foreign currency for a fixed U.S. dollar amount
approximating the value of some or all of its fund's portfolio securities either
denominated in, or whose value is tied to, such foreign currency.

         As to the first  circumstance,  when a fund enters into a trade for the
purchase  or sale of a security  denominated  in a foreign  currency,  it may be
desirable to establish (lock in) the U.S.  dollar cost or proceeds.  By entering
into  forward  contracts  in U.S.  dollars for the purchase or sale of a foreign
currency involved in an underlying security  transaction,  the fund will be able
to protect  itself  against a possible loss between trade and  settlement  dates
resulting from the adverse change in the relationship between the U.S. dollar at
the subject foreign currency.

         Under the  second  circumstance,  when the  manager  believes  that the
currency of a particular  country may suffer a substantial  decline  relative to
the U.S.  dollar, a fund could enter into a foreign contract to sell for a fixed
dollar amount the amount in foreign  currencies  approximating the value of some
or all of its portfolio securities either denominated in, or whose value is tied
to,  such  foreign  currency.  The fund will  place  cash or  high-grade  liquid
securities in a separate  account with its custodian in an amount  sufficient to
cover its obligation under the contract.  If the value of the securities  placed
in the separate account  declines,  additional cash or securities will be placed
in the  account  on a daily  basis so that the value of the  account  equals the
amount of the fund's commitments with respect to such contracts.

         The precise matching of forward  contracts in the amounts and values of
securities  involved  would not generally be possible since the future values of
such foreign  currencies will change as a consequence of market movements in the
values of those securities between the date the forward contract is entered into
and the date it matures.  Predicting  short-term  currency  market  movements is
extremely difficult, and the successful execution of short-term hedging strategy
is highly uncertain. The manager does not intend to enter into such contracts on
a regular basis.  Normally,  consideration of the prospect for currency parities
will be incorporated into the long-term  investment  decisions made with respect
to overall diversification strategies.  However, the manager believes that it is
important  to have  flexibility  to enter into such  forward  contracts  when it
determines that a fund's best interests may be served.

         Generally, a fund will not enter into a forward contract with a term of
greater  than one year.  At the maturity of the forward  contract,  the fund may
either sell the portfolio security and make delivery of the foreign currency, or
it may retain the security and terminate  the  obligation to deliver the foreign
currency by purchasing an "offsetting"  forward  contract with the same currency
trader  obligating  the fund to purchase,  on the same maturity  date,  the same
amount of the foreign currency.

         It is impossible  to forecast with absolute  precision the market value
of portfolio securities at the expiration of the forward contract.  Accordingly,
it may be necessary for a fund to purchase  additional  foreign  currency on the
spot market (and bear the expense of such  purchase)  if the market value of the
security is less than the amount of foreign  currency  the fund is  obligated to
deliver and if a decision is made to sell the security and make  delivery of the
foreign currency the fund is obligated to deliver.

                                                                         Page 10

AN EXPLANATION OF FIXED INCOME SECURITIES RATINGS

         As  described in the  Prospectus,  the funds may invest in fixed income
securities.  Fixed income securities  ratings provide the manager with a current
assessment  of the credit  rating of an issuer with respect to a specific  fixed
income  security.  The  following  is a  description  of the  rating  categories
utilized by the rating services referenced in the Prospectus disclosure.

         The  following  summarizes  the  ratings  used  by  Standard  &  Poor's
Corporation for bonds:

         AAA -- This is the highest rating  assigned by S&P to a debt obligation
         and  indicates an extremely  strong  capacity to pay interest and repay
         principal.

         AA -- Debt rated AA is considered to have a very strong capacity to pay
         interest  and repay  principal  and  differs  from AAA issues only to a
         small degree.

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

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

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

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

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

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

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

                                                                         Page 11

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

         D -- Debt rated D is in payment default.  The D rating category is used
         when interest  payments or principal  payments are not made on the date
         due even if the  applicable  grace period has not  expired,  unless S&P
         believes that such payments will be made during such grace period.  The
         D rating also will be used upon the filing of a bankruptcy  petition if
         debt service payments are jeopardized.

         To provide more detailed  indications  of credit  quality,  the ratings
from AA to CCC may be modified  by the  addition of a plus or minus sign to show
relative standing within these major rating categories.

         The following summarizes the ratings used by Moody's Investors Service,
Inc. for bonds:

         Aaa -- Bonds that are rated Aaa are  judged to be of the best  quality.
         They carry the smallest  degree of  investment  risk and are  generally
         referred to as "gilt edge." Interest  payments are protected by a large
         or by an exceptionally  stable margin,  and principal is secure.  While
         the various protective  elements are likely to change,  such changes as
         can be visualized are most unlikely to impair the fundamentally  strong
         position of such issues.

         Aa -- Bonds that are rated Aa are  judged to be of high  quality by all
         standards.  Together with the Aaa group,  they comprise what  generally
         are known as high-grade bonds. They are rated lower than the best bonds
         because margins of protection may not be as large as in Aaa securities,
         or fluctuation of protective  elements may be of greater amplitude,  or
         there may be other elements present that make the long-term risk appear
         somewhat larger than the Aaa securities.

         A  --  Bonds  that  are  rated  A  possess  many  favorable  investment
         attributes and are to be considered as upper-medium-grade  obligations.
         Factors  giving  security to  principal  and  interest  are  considered
         adequate but elements may be present that suggest a  susceptibility  to
         impairment some time in the future.

         Baa --  Bonds  that  are  rated  Baa  are  considered  as  medium-grade
         obligations  (i.e.,  they  are  neither  highly  protected  nor  poorly
         secured).  Interest payments and principal security appear adequate for
         the present but certain  protective  elements  may be lacking or may be
         characteristically unreliable over any great length of time. Such bonds
         lack   outstanding   investment   characteristics   and  in  fact  have
         speculative characteristics, as well.

         Ba -- Bonds that are rated Ba are judged to have speculative  elements;
         their future cannot be considered as well-assured. Often the protection
         of interest and principal  payments may be very  moderate,  and thereby
         not well  safeguarded,  during both good and bad times over the future.
         Uncertainty of position characterizes bonds in this class.

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

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

                                                                         Page 12

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

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

         Moody's applies  numerical  modifiers 1, 2 and 3 in each generic rating
category  from Aa through B. The modifier 1 indicates  that the bond being rated
ranks in the higher end of its generic rating category; the modifier 2 indicates
a mid-range ranking;  and the modifier 3 indicates a ranking in the lower end of
that generic rating category.

SHORT SALES

         The common stock funds and the Balanced  Fund may engage in short sales
if, at the time of the short sale,  the fund owns or has the right to acquire an
equal amount of the security being sold short at no additional cost.

         In a short sale, the seller does not immediately deliver the securities
sold and is said to have a short  position in those  securities  until  delivery
occurs.  To make delivery to the  purchaser,  the executing  broker  borrows the
securities being sold short on behalf of the seller. While the short position is
maintained,  the seller  collateralizes its obligation to deliver the securities
sold  short in an  amount  equal  to the  proceeds  of the  short  sale  plus an
additional  margin amount  established  by the Board of Governors of the Federal
Reserve.  If a fund  engages in a short sale,  the  collateral  account  will be
maintained by the fund's custodian.  While the short sale is open, the fund will
maintain in a segregated  custodial account an amount of securities  convertible
into, or  exchangeable  for, such equivalent  securities at no additional  cost.
These securities would constitute the fund's long position.

         A fund may make a short sale, as described above, when it wants to sell
the  security it owns at a current  attractive  price,  but also wishes to defer
recognition  of gain or loss for federal income tax purposes and for purposes of
satisfying certain tests applicable to regulated  investment companies under the
Internal  Revenue  Code.  In such a case,  any future  losses in the fund's long
position should be reduced by a gain in the short position.  The extent to which
such gains or losses are reduced  would  depend upon the amount of the  security
sold  short  relative  to the  amount  the  fund  owns.  There  will be  certain
additional  transaction  costs  associated  with short sales,  but the fund will
endeavor  to offset  these costs with  income  from the  investment  of the cash
proceeds of short sales.

PORTFOLIO TURNOVER

         The  portfolio  turnover  rates of the funds are shown in the Financial
Highlights table in the prospectuses.

         With respect to each series of shares,  the manager  will  purchase and
sell securities  without regard to the length of time the security has been held
and, accordingly,  it can be expected that the rate of portfolio turnover may be
substantial.

         The funds  intend to  purchase a given  security  whenever  the manager
believes it will contribute to the stated  objective of the series,  even if the
same  security has only 

                                                                         Page 13

recently been sold. In selling a given security,  the manager keeps in mind that
(1) profits from sales of securities held less than three months must be limited
in order to meet the  requirements of Subchapter M of the Internal Revenue Code,
and (2) profits from sales of securities are taxed to  shareholders  as ordinary
income.  Subject  to those  considerations,  the  corporation  will sell a given
security,  no matter  for how long or for how short a period it has been held in
the portfolio,  and no matter whether the sale is at a gain or at a loss, if the
manager  believes that it is not fulfilling its purpose,  either because,  among
other things,  it did not live up to the manager's  expectations,  or because it
may be replaced with another security holding greater promise, or because it has
reached its optimum potential,  or because of a change in the circumstances of a
particular company or industry or in general economic conditions,  or because of
some combination of such reasons.

         When a general decline in security  prices is  anticipated,  the equity
funds may decrease or eliminate  entirely  their equity  positions  and increase
their cash positions, and when a rise in price levels is anticipated, the equity
funds may increase  their equity  positions and decrease  their cash  positions.
However,  these funds have followed the practice of remaining  essentially fully
invested in equity securities.

         Since investment decisions are based on the anticipated contribution of
the security in question to the corporation's  objectives,  the manager believes
that the rate of portfolio  turnover is irrelevant  when it believes a change is
in order to achieve those  objectives,  and the  corporation's  annual portfolio
turnover  rate  cannot  be  anticipated  and  may be  comparatively  high.  This
disclosure regarding portfolio turnover is a statement of fundamental policy and
may be changed only by a vote of the shareholders.

         Since the manager does not take portfolio turnover rate into account in
making investment  decisions,  (1) the manager has no intention of accomplishing
any  particular  rate of  portfolio  turnover,  whether high or low, and (2) the
portfolio   turnover   rates  in  the  past  should  not  be   considered  as  a
representation of the rates which will be attained in the future.

INTEREST RATE FUTURES CONTRACTS AND RELATED OPTIONS

         Limited-Term  Bond,  Intermediate-Term  Bond,  Benham Bond, High Yield,
Limited-Term Tax-Exempt,  Intermediate-Term  Tax-Exempt and Long-Term Tax-Exempt
(the funds) may buy and sell  interest rate futures  contracts  relating to debt
securities ("debt futures," i.e., futures relating to debt securities, and "bond
index futures," i.e.,  futures  relating to indexes on types or groups of bonds)
and  write  and buy put and call  options  relating  to  interest  rate  futures
contracts.

         A fund will not purchase or sell futures  contracts and options thereon
for  speculative  purposes  but rather only for the  purpose of hedging  against
changes in the market value of its portfolio securities or changes in the market
value of securities that American Century Investment Management,  Inc. (manager)
anticipates  that it may wish to include in the  portfolio of a fund. A fund may
sell a future  or write a call or  purchase  a put on a  future  if the  manager
anticipates  that a general market or market sector decline may adversely affect
the market value of any or all of the fund's holdings. A

                                                                         Page 14

fund  may buy a  future  or  purchase  a call or sell a put on a  future  if the
manager  anticipates a significant  market  advance in the type of securities it
intends  to  purchase  for the fund's  portfolio  at a time when the fund is not
invested in debt securities to the extent permitted by its investment  policies.
A fund may purchase a future or a call option thereon as a temporary  substitute
for the  purchase of  individual  securities  which may then be  purchased in an
orderly fashion.  As securities are purchased,  corresponding  futures positions
would be terminated by offsetting sales.

         The "sale" of a debt  future  means the  acquisition  by the fund of an
obligation to deliver the related debt securities (i.e., those called for by the
contract) at a specified  price on a specified  date.  The  "purchase" of a debt
future means the acquisition by the fund of an obligation to acquire the related
debt  securities at a specified  time on a specified  date. The "sale" of a bond
index future means the  acquisition  by the fund of an  obligation to deliver an
amount of cash equal to a specified  dollar amount times the difference  between
the index value at the close of the last trading day of the future and the price
at which the future is  originally  struck.  No  physical  delivery of the bonds
making up the index is  expected  to be made.  The  "purchase"  of a bond  index
future means the  acquisition  by the fund of an  obligation to take delivery of
such an amount of cash.

         Unlike  when the fund  purchases  or sells a bond,  no price is paid or
received by the fund upon the  purchase or sale of the  future.  Initially,  the
fund will be  required  to  deposit an amount of cash or  securities  equal to a
varying  specified  percentage of the contract  amount.  This amount is known as
initial  margin.  Cash  held in the  margin  account  is not  income  producing.
Subsequent  payments,  called variation margin, to and from the broker,  will be
made on a daily basis as the price of the  underlying  debt  securities or index
fluctuates,  making the future more or less valuable, a process known as mark to
the market.  Changes in variation  margin are recorded by the fund as unrealized
gains or losses.  At any time prior to  expiration  of the future,  the fund may
elect to close the position by taking an opposite  position that will operate to
terminate its position in the future. A final  determination of variation margin
is then made;  additional cash is required to be paid by or released to the fund
and the fund realizes a loss or a gain.

         When  a  fund  writes  an  option  on a  futures  contract  it  becomes
obligated,  in return for the  premium  paid,  to assume a position in a futures
contract  at a  specified  exercise  price  at any time  during  the term of the
option.  If a fund has written a call,  it becomes  obligated to assume a "long"
position in a futures contract, which means that it is required to take delivery
of the underlying securities. If it has written a put, it is obligated to assume
a "short"  position  in a futures  contract,  which means that it is required to
deliver  the  underlying  securities.  When the fund  purchases  an  option on a
futures contract it acquires a right in return for the premium it pays to assume
a position in a futures contract.

         If a fund writes an option on a futures contract it will be required to
deposit initial and variation  margin pursuant to requirements  similar to those
applicable to futures contracts. Premiums received from the writing of an option
on a future are included in the initial margin deposit.

                                                                         Page 15

         For options sold,  the fund will segregate  cash or  high-quality  debt
securities  equal to the value of  securities  underlying  the option unless the
option is otherwise covered.

         A fund will deposit in a segregated  account  with its  custodian  bank
high-quality  debt  obligations  maturing  in one year or less,  or cash,  in an
amount equal to the  fluctuating  market value of long futures  contracts it has
purchased less any margin  deposited on its long  position.  It may hold cash or
acquire such debt obligations for the purpose of making these deposits.

         Changes in variation  margin are recorded by a fund as unrealized gains
or losses.  Initial  margin  payments will be deposited in the fund's  custodian
bank in an account registered in the broker's name; access to the assets in that
account may be made by the broker only under specified  conditions.  At any time
prior to expiration of a futures contract or an option thereon, a fund may elect
to close the  position  by taking an  opposite  position  that will  operate  to
terminate its position in the futures contract or option. A final  determination
of variation margin is made at that time; additional cash is required to be paid
by or released to it and it realizes a loss or gain.

         Although futures  contracts by their terms call for the actual delivery
or  acquisition  of the  underlying  securities  or  cash,  in  most  cases  the
contractual  obligation is so fulfilled without having to make or take delivery.
The funds do not intend to make or take delivery of the  underlying  obligation.
All  transactions in futures  contracts and options thereon are made,  offset or
fulfilled  through a  clearinghouse  associated  with the  exchange on which the
instruments  are  traded.  Although  the funds  intend  to buy and sell  futures
contracts  only on  exchanges  where  there  appears  to be an active  secondary
market,  there is no assurance that a liquid secondary market will exist for any
particular  future at any particular time. In such event, it may not be possible
to close a futures contract position.  Similar market liquidity risks occur with
respect to options.

         The use of futures  contracts and options thereon to attempt to protect
against the market  risk of a decline in the value of  portfolio  securities  is
referred to as having a "short futures  position." The use of futures  contracts
and  options  thereon to attempt to protect  against the market risk that a fund
might not be fully  invested at a time when the value of the securities in which
it invests is increasing is referred to as having a "long futures position." The
funds must operate within certain restrictions as to long and short positions in
futures  contracts  and options  thereon under a rule (CFTC Rule) adopted by the
Commodity  Futures  Trading  Commission  under the Commodity  Exchange Act to be
eligible for the exclusion  provided by the CFTC Rule from  registration  by the
fund with the CFTC as a "commodity  pool  operator"  (as defined under the CEA),
and must  represent to the CFTC that it will operate  within such  restrictions.
Under these  restrictions  a fund will not, as to any  positions,  whether long,
short or a combination thereof, enter into futures contracts and options thereon
for which the  aggregate  initial  margins  and  premiums  exceed 5% of the fair
market value of the fund's assets after taking into account  unrealized  profits
and losses on options the fund has entered  into;  in the case of an option that
is  "in-the-money"  (as defined under the CEA), the  in-the-money  amount may be
excluded in computing such 5%. (In general,  a call option on a futures contract
is in-the-money if the value of the future exceeds the strike,  i.e.,  

                                                                         Page 16

exercise,  price of the call; a put option on a futures contract is in-the-money
if the value of the futures  contract that is the subject of the put is exceeded
by the strike price of the put.) Under the restrictions, a fund also must, as to
short positions,  use futures contracts and options thereon solely for bona fide
hedging  purposes  within the  meaning and intent of the  applicable  provisions
under  the  CEA.  As to its  long  positions  that  are used as part of a fund's
portfolio strategy and are incidental to the fund's activities in the underlying
cash market, the "underlying  commodity value" (see below) of the fund's futures
contract and options thereon must not exceed the sum of (i) cash set aside in an
identifiable   manner,  or  short-term  U.S.  debt  obligations  or  other  U.S.
dollar-denominated,  high-quality,  short-term  money market  instruments so set
aside,  plus any funds  deposited as margin;  (ii) cash  proceeds  from existing
investments  due in 30 days;  and  (iii)  accrued  profits  held at the  futures
commission  merchant.  [There are described above the segregated accounts that a
fund  must  maintain  with its  custodian  bank as to its  options  and  futures
contracts activities due to Securities and Exchange Commission requirements. The
fund  will,  as to its  long  positions,  be  required  to  abide  by  the  more
restrictive of these SEC and CFTC requirements.] The underlying  commodity value
of a futures contract is computed by multiplying the size (dollar amount) of the
futures contract by the daily settlement price of the futures  contract.  For an
option on a futures  contract,  that value is the underlying  commodity value of
the future underlying the option.

         Since futures contracts and options thereon can replicate  movements in
the cash markets for the  securities  in which a fund invests  without the large
cash investments  required for dealing in such markets,  they may subject a fund
to  greater  and more  volatile  risks  than might  otherwise  be the case.  The
principal  risks related to the use of such  instruments  are (i) the offsetting
correlation  between movements in the market price of the portfolio  investments
(held or  intended)  being  hedged and in the price of the  futures  contract or
option may be imperfect;  (ii) possible  lack of a liquid  secondary  market for
closing  out  futures  or  options  positions;  (iii)  the need  for  additional
portfolio  management  skills and techniques;  (iv) losses due to  unanticipated
market  price  movements;  and  (v)  the  bankruptcy  or  failure  of a  futures
commission  merchant  holding  margin  deposits made by the funds and the funds'
inability to obtain repayment of all or part of such deposits. For a hedge to be
completely  effective,  the price change of the hedging  instrument should equal
the price change of the security being hedged.  Such equal price changes are not
always possible because the investment underlying the hedging instrument may not
be the same investment that is being hedged.  The manager will attempt to create
a  closely  correlated  hedge,  but  hedging  activity  may  not  be  completely
successful in eliminating market value fluctuation. The ordinary spreads between
prices in the cash and futures markets, due to the differences in the natures of
those  markets,   are  subject  to  the  following   factors  which  may  create
distortions. First, all participants in the futures market are subject to margin
deposit and  maintenance  requirements.  Rather than meeting  additional  margin
deposit  requirements,  investors may close futures contracts through offsetting
transactions  which could distort the normal  relationship  between the cash and
futures  markets.  Second,  the  liquidity  of the  futures  market  depends  on
participants entering into off-setting transactions rather than making or taking
delivery. To the extent participants decide to make or take delivery,  

                                                                         Page 17


liquidity in the futures  market could be reduced,  thus  producing  distortion.
Third,  from the point of view of speculators,  the deposit  requirements in the
futures  market are less  onerous  than margin  requirements  in the  securities
market. Therefore,  increased participation by speculators in the futures market
may cause temporary price distortions.  Due to the possibility of distortion,  a
correct  forecast of general interest trends by the manager may still not result
in a successful transaction. The manager may be incorrect in its expectations as
to the extent of various  interest rate  movements or the time span within which
the movements take place.

         The risk of imperfect  correlation  between movements in the price of a
bond index  future and  movements  in the price of the  securities  that are the
subject of the hedge increases as the composition of a fund's portfolio diverges
from the  securities  included in the  applicable  index.  The price of the bond
index future may move more than or less than the price of the  securities  being
hedged.  If the price of the bond index  future moves less than the price of the
securities  that are the  subject  of the  hedge,  the  hedge  will not be fully
effective,  but if the  price of the  securities  being  hedged  has moved in an
unfavorable direction, the fund would be in a better position than if it had not
hedged  at all.  If the  price of the  securities  being  hedged  has moved in a
favorable  direction,  this  advantage  will be partially  offset by the futures
contract.  If the price of the futures contract moves more than the price of the
security, a fund will experience either a loss or a gain on the futures contract
that will not be completely  offset by movements in the price of the  securities
that are the subject of the hedge.  To compensate for the imperfect  correlation
of movements in the price of the  securities  being hedged and  movements in the
price of the bond index futures,  a fund may buy or sell bond index futures in a
greater  dollar amount than the dollar amount of securities  being hedged if the
historical volatility of the prices of such securities being hedged is less than
the historical  volatility of the bond index. It is also possible that,  where a
fund has sold futures contracts to hedge its securities against a decline in the
market, the market may advance and the value of securities held in the portfolio
may decline.  If this occurred,  a fund would lose money on the futures contract
and also  experience a decline in value in its  portfolio  securities.  However,
while this could occur for a brief period or to a very small  degree,  over time
the  value  of a  portfolio  of debt  securities  will  tend to move in the same
direction as the market indexes upon which the futures contracts are based.

         Where bond index  futures  are  purchased  to hedge  against a possible
increase in the price of bonds before a fund is able to invest in  securities in
an orderly fashion,  it is possible that the market may decline instead;  if the
fund then  concludes not to invest in securities at that time because of concern
as to possible  further market  decline or for other reasons,  it will realize a
loss on the futures  contract  that is not offset by a reduction in the price of
the securities it had anticipated purchasing.

         The risks of  investment in options on bond indexes may be greater than
options on  securities.  Because  exercises of bond index options are settled in
cash, when a fund writes a call on a bond index it cannot provide in advance for
its potential  settlement  obligations  by acquiring and holding the  underlying
securities.  A fund can  offset  some of the  risk of its  writing  position  by
holding a portfolio of bonds similar to those on which the  underlying  index is
based.  However,  a fund  cannot,  as a  practical  matter,  acquire  and hold a
portfolio containing exactly the same securities as the underlying index and,

                                                                         Page 18

as a result,  bears a risk that the value of the securities  held will vary from
the value of the index.  Even if a fund could  assemble a portfolio that exactly
reproduced the composition of the underlying  index, it still would not be fully
covered from a risk standpoint  because of the "timing risk" inherent in writing
index  options.  When an index option is exercised,  the amount of cash that the
holder is  entitled  to receive is  determined  by the  difference  between  the
exercise  price  and the  closing  index  level on the date  when the  option is
exercised.  As with other kinds of options, a fund, as the call writer, will not
learn that it has been assigned until the next business day at the earliest. The
time lag between  exercise and notice of assignment poses no risk for the writer
of a covered call on a specific  underlying security because there, the writer's
obligation is to deliver the underlying  security,  not to pay its value as of a
fixed  time in the  past.  So long as the  writer  already  owns the  underlying
security, it can satisfy its settlement obligations by simply delivering it, and
the risk that its value may have  declined  since the exercise  date is borne by
the exercising  holder.  In contrast,  even if the writer of an index call holds
securities that exactly match the  composition of the underlying  index, it will
not be able to satisfy its assignment obligations by delivering those securities
against payment of the exercise price.  Instead, it will be required to pay cash
in an amount based on the closing index value of the exercise  date;  and by the
time it learns that it has been  assigned,  the index may have  declined  with a
corresponding  decline in the value of its  portfolio.  This "timing risk" is an
inherent  limitation  on the  ability of index call  writers to cover their risk
exposure by holding securities positions.

         If a fund has  purchased  an index  option and  exercises it before the
closing index value for that day is  available,  it runs the risk that the level
of the underlying  index may  subsequently  change.  If such a change causes the
exercised option to fall  out-of-the-money,  the fund exercising the option must
pay the difference between the closing index value and the exercise price of the
option (times the applicable multiplier) to the assigned writer.

MUNICIPAL LEASES

         The  tax-exempt  funds may invest in municipal  lease  obligations  and
certificates  of  participation  in  such   obligations   (collectively,   lease
obligations). A lease obligation does not constitute a general obligation of the
municipality for which the municipality's taxing power is pledged,  although the
lease obligation is ordinarily backed by the  municipality's  covenant to budget
for the payments due under the lease obligation.

         Certain lease  obligations  contain  "non-appropriation"  clauses which
provide  that  the  municipality  has no  obligation  to make  lease  obligation
payments in future  years  unless  money is  appropriated  for such purpose on a
yearly basis. Although  "non-appropriation" lease obligations are secured by the
leased property,  disposition of the property in the event of foreclosure  might
prove  difficult.   In  evaluating  a  potential  investment  in  such  a  lease
obligation,  management  will  consider:  (i) the credit quality of the obligor,
(ii) whether the underlying  property is essential to a  governmental  function,
and (iii)  whether  the lease  obligation  contains  covenants  prohibiting  the
obligor  from  substituting  similar  property  if the  obligor  fails  to  make
appropriations for the lease obligation.

                                                                         Page 19

         Municipal  lease   obligations  may  be  determined  to  be  liquid  in
accordance with the guidelines  established by the funds' board of directors for
purposes of complying with the funds'  investment  restrictions.  In determining
the  liquidity  of a  lease  obligation,  the  manager  will  consider:  (1) the
frequency  of trades  and  quotes  for the lease  obligation,  (2) the number of
dealers willing to purchase or sell the lease obligation and the number of other
potential  purchasers,  (3)  dealer  undertakings  to make a market in the lease
obligation,  (4) the nature of the marketplace trades, including the time needed
to dispose of the lease  obligation,  the method of soliciting  offers,  and the
mechanics of transfer,  (5) whether the lease  obligation is of a size that will
be  attractive  to  institutional  investors,  (6) whether the lease  obligation
contains a  non-appropriation  clause and the  likelihood  that the obligor will
fail to make an  appropriation  therefore,  and (7) such  other  factors  as the
manager may determine to be relevant to such determination.

OFFICERS AND DIRECTORS

         The  principal  officers  and  directors  of  the  corporation,   their
principal business experience during the past five years, and their affiliations
with the fund's investment manager, American Century Investment Management, Inc.
and its transfer agent, American Century Services Corporation, are listed below.
Unless  otherwise  noted,  the business  address of each director and officer is
American  Century Tower,  4500 Main Street,  Kansas City,  Missouri  64111.  All
persons named as officers of the  Corporation  also serve in similar  capacities
for other funds advised by the manager.  Those  directors  that are  "interested
persons" as defined in the  Investment  Company Act of 1940 are  indicated by an
asterisk(*).

         JAMES E. STOWERS JR.,* Chairman of the Board and Director;  Chairman of
the Board,  Director and controlling  shareholder of American Century Companies,
Inc., parent  corporation of American Century  Investment  Management,  Inc. and
American  Century  Services  Corporation;  Chairman of the Board and Director of
American  Century  Investment  Management,  Inc. and American  Century  Services
Corporation; father of James E. Stowers III.

         JAMES E. STOWERS III,* President, Chief Executive Officer and Director;
President,  Chief Executive  Officer and Director,  American Century  Companies,
Inc., American Century Investment Management, Inc. and American Century Services
Corporation.

         THOMAS A. BROWN, Director; 2029 Wyandotte, Kansas City, Missouri; Chief
Executive Officer, Associated Bearing Company, a corporation engaged in the sale
of bearings and power transmission products.

         ROBERT  W.  DOERING,  M.D.,  Director;  6420  Prospect,   Kansas  City,
Missouri; general surgeon.

         D. D. (DEL) HOCK,  Director;  1225  Seventeenth  Street  #900,  Denver,
Colorado;  Chairman,  President  and Chief  Executive  Officer,  Public  Service
Company of Colorado.

         LINSLEY L.  LUNDGAARD,  Vice Chairman of the Board and Director;  18648
White Wing Drive,  Rio Verde,  Arizona;  retired;  formerly  Vice  President and
National Sales Manager, Flour Milling Division, Cargill, Inc.

                                                                         Page 20

         DONALD H. PRATT,  Director;  P.O. Box 419917,  Kansas  City,  Missouri;
President, Butler Manufacturing Company.

         LLOYD T. SILVER JR., Director;  2300 West 70th Terrace,  Mission Hills,
Kansas; President, LSC, Inc., manufacturer's representative.

         M. JEANNINE STRANDJORD,  Director;  908 West 121st Street, Kansas City,
Missouri; Senior Vice President and Treasurer, Sprint Corporation.

         WILLIAM M. LYONS,  Executive Vice President,  Chief Operating  Officer,
Secretary and General Counsel; Executive Vice President, Chief Operating Officer
and  General  Counsel,  American  Century  Companies,   Inc.,  American  Century
Investment Management, Inc. and American Century Services Corporation.

         ROBERT T. JACKSON,  Executive  Vice  President and Principal  Financial
Officer;  Executive Vice President and Treasurer,  American  Century  Companies,
Inc., American Century Investment Management, Inc. and American Century Services
Corporation; formerly Executive Vice President, Kemper Corporation.

         MARYANNE   ROEPKE,   CPA,  Vice  President,   Treasurer  and  Principal
Accounting Officer; Vice President, American Century Services Corporation.

         PATRICK A. LOOBY,  Vice  President;  Vice President,  American  Century
Services Corporation.

         MERELE A.  MAY, Controller.

         C. JEAN WADE, CPA,  Controller;  formerly,  accountant,  Baird, Kurtz &
Dobson.

         The Board of Directors has established  four standing  committees,  the
Executive  Committee,  the Audit  Committee,  the  Compliance  Committee and the
Nominating Committee.

         Messrs.   Stowers  Jr.,  Stowers  III,  and  Lundgaard  constitute  the
Executive  Committee  of the Board of  Directors.  The  committee  performs  the
functions of the Board of Directors  between  meetings of the Board,  subject to
the limitations on its power set out in the Maryland  General  Corporation  Law,
and except for matters  required by the Investment  Company Act to be acted upon
by the whole Board.

         Messrs.  Lundgaard  (chairman),  Doering  and Hock  and Ms.  Strandjord
constitute the Audit  Committee.  The functions of the Audit  Committee  include
recommending the engagement of the funds' independent accountants, reviewing the
arrangements for and scope of the annual audit,  reviewing  comments made by the
independent accountants with respect to internal controls and the considerations
given or the  corrective  action taken by  management,  and  reviewing  nonaudit
services provided by the independent accountants.

         Messrs.  Brown  (chairman),  Pratt and Silver constitute the Compliance
Committee.  The  functions of the  Compliance  Committee  include  reviewing the
results of the funds' compliance  testing program,  reviewing  quarterly reports
from  the  manager  to  the  Board  regarding  various  compliance  matters  and
monitoring the implementation of the funds' Code of Ethics, including violations
thereof.

         The Nominating  Committee has as its principal  role the  consideration
and  recommendation  of individuals  for  nomination as directors.  The names of
potential  director  candidates  are drawn from a number of  sources,  including
recommendations  from members of the Board,  management and  shareholders.  This
committee  also reviews and makes  recommendations  to the Board with respect to
the composition of 

                                                                         Page 21


Board committees and other  Board-related  matters,  including its organization,
size, composition, responsibilities,  functions and compensation. The members of
the nominating  committee are Messrs.  Pratt  (Chairman),  Lundgaard and Stowers
III.

         The  Directors of the  corporation  also serve as  Directors  for other
funds advised by the manager. Each Director who is not an "interested person" as
defined in the  Investment  Company Act  receives for service as a member of the
Board of all Twentieth Century investment  companies an annual director's fee of
$44,000,  and an additional fee of $1,000 per regular Board meeting attended and
$500 per special  Board  meeting and committee  meeting  attended.  In addition,
those  Directors  who are not  "interested  persons"  and serve as chairman of a
committee  of the Board of  Directors  receive  an  additional  $2,000  for such
services. These fees and expenses are divided among the six investment companies
based  upon  their  relative  net  assets.  Under  the  terms of the  management
agreement with the manager,  the funds are  responsible for paying such fees and
expenses.  Set forth below is the  aggregate  compensation  paid for the periods
indicated by the funds and by the American Century family of funds as a whole to
each  Director who is not an  "interested  person" as defined in the  Investment
Company Act.

                           Aggregate            Total Compensation from
                         Compensation            the American Century
Director             from the corporation 1       Family of Funds 2
- --------------------------------------------------------------------------
Thomas A. Brown            40,880.74                 45,000
Robert W. Doering, M.D.    38,046.00                 41,500
Linsley L. Lundgaard       41,179.13                 45,000
Donald H. Pratt            39,388.80                 43,333
Lloyd T. Silver Jr.        39,388.80                 43,000
M. Jeannine Strandjord     39,388.80                 42,500
John M. Urie 3             41,179.13                 37,167
Del Hock 3                     0                      7,500
- --------------------------------------------------------------------------

1    Includes  compensation  actually paid by the corporation  during the fiscal
     year ended October 31, 1996.

2    Includes compensation paid by the fifteen investment company members of the
     American  Century  family of funds for the calendar year ended December 31,
     1996.

3    Del Hock replaced Jack Urie as an independent  director  effective  October
     31, 1996.

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

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

                                                                         Page 22

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

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

         No deferred  fees were paid to any  participating  Directors  under the
Plan during the fiscal year ended October 31, 1995.

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

MANAGEMENT

         A description of the responsibilities and method of compensation of the
funds' investment manager, American Century Investment Management, Inc., appears
in each prospectus under the caption, "Management."

         During the past three years, the management fees of the manager were:

FUND                                     Years Ended October 31,
- - ------------------------------------------------------------------------
                                  1996            1995           1994
- - ------------------------------------------------------------------------
SELECT
     Management fees       $  39,305,054  $   40,918,896   $   46,147,911
     Average net assets    3,935,124,830   4,100,172,070    4,616,441,587
HERITAGE
     Management fees          10,572,605       8,900,956        8,238,322
     Average net assets    1,065,351,654     899,947,177      822,480,118
GROWTH
     Management fees          47,632,557      45,713,727       43,916,916
     Average net assets    4,789,339,586   4,575,064,437    4,404,299,518
ULTRA
     Management fees         162,207,777     113,284,379       91,474,921
     Average net asset    16,286,747,712  11,330,063,925    9,149,558,371
VISTA
     Management fees          20,199,050      11,104,694        7,226,302
     Average net assets    2,041,214,251   1,123,979,069      732,311,586
GIFTRUST
     Management fees           7,161,935       3,840,425        1,875,098
     Average net assets      731,222,156     389,827,724      189,487,155

BALANCED
     Management fees       $  8,345,585     $  7,303,148     $  6,861,248
     Average net assets     844,937,283      743,379,550      687,079,027
CASH RESERVE
     Management fees          9,593,595        9,546,843       10,282,495

                                                                         Page 23


     Average net assets   1,375,448,677    1,367,481,447    1,294,838,404
SHORT-TERM GOVERNMENT FUND
     Management fees          2,570,178        2,708,850        3,611,805
     Average net assets     370,206,942      387,845,926      447,658,784
INTERMEDIATE-TERM
GOVERNMENT FUND
     Management fees            179,763          104,141           19,566
     Average net assets      24,215,896       14,092,947        3,821,083
LIMITED-TERM
TAX-EXEMPT
     Management fees            205,918(1)         0                 0
     Average net assets      53,836,145       59,645,970       57,545,359
INTERMEDIATE-TERM
TAX-EXEMPT
     Management fees            484,914          471,159          537,893
     Average net assets      81,296,908       78,781,379       89,751,385
LONG-TERM TAX-EXEMPT
     Management fees            352,945          317,622          361,732
     Average net assets      59,479,341       53,244,618       60,383,665
LIMITED-TERM BOND
     Management fees             52,116           40,530           17,509
     Average net assets       7,680,716        5,906,790        3,690,814
INTERMEDIATE-TERM BOND
     Management fees            108,870           59,552           17,532
     Average net assets      14,807,295        8,128,357        3,458,399
BENHAM BOND
     Management fees          1,148,428        1,038,120        1,233,251
     Average net assets     146,071,676      132,239,065      141,750,838

- --------------------------------------------------------------------------
1 Net of fees waived by the manager.

         The Advisor Class of Ultra and Vista commenced operations on October 2,
1996.  The  management  fees shown above  include  $7,146 paid on Advisor  Class
shares of Ultra and $3,127 paid on Advisor  Class shares of Vista for the 29 day
period ended October 31, 1996.

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

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

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

         The  management  agreement  also  provides  that  the  manager  and its
officers,  directors and employees may engage in other business, devote time and
attention to

                                                                         Page 24

any other  business  whether  of a similar  or  dissimilar  nature,  and  render
services to others.

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

         The manager may  aggregate  purchase  and sale orders of the funds with
purchase  and sale orders of its other  clients when the manager  believes  that
such aggregation  provides the best execution for the funds. The funds' Board of
Directors has approved the policy of the manager with respect to the aggregation
of portfolio  transactions.  Where portfolio  transactions have been aggregated,
the funds  participate at the average share price for all  transactions  in that
security on a given day and share  transaction  costs on a pro rata  basis.  The
manager  will not  aggregate  portfolio  transactions  of the  funds  unless  it
believes such  aggregation is consistent with its duty to seek best execution on
behalf  of the  funds and the terms of the  management  agreement.  The  manager
receives  no  additional  compensation  or  remuneration  as a  result  of  such
aggregation.

         On January 31, 1997, the manager was acting as an investment advisor to
12 institutional accounts with an aggregate value of $498,426,343. While each of
these clients has unique investment  restrictions and guidelines,  some have all
elected to have their portfolios managed in a manner similar to the portfolio of
either Growth or Select. Accordingly, anytime a security is being bought or sold
for the Growth or Select funds, it may also be bought or sold for some or all of
such institutional  accounts.  The manager anticipates acquiring additional such
accounts in the future.

         American Century Services  Corporation  provides  physical  facilities,
including  computer  hardware  and software and  personnel,  for the  day-to-day
administration  of the funds  and of the  manager.  The  manager  pays  American
Century Services  Corporation for such services.  The payments by the manager to
American  Century  Services  Corporation  for the years ending October 31, 1996,
1995  and  1994  have  been,   respectively,   $118,664,664,   $100,504,910  and
$139,895,701.

         As stated in each  prospectus,  all of the  stock of  American  Century
Services Corporation and American Century Investment  Management,  Inc. is owned
by American Century Companies, Inc.

CUSTODIANS

         Chase  Manhattan  Bank,  770 Broadway,  10th Floor,  New York, New York
10003-9598,  Commerce Bank, N.A., 1000 Walnut,  Kansas City, Missouri 64105, and
United 

                                                                         Page 25

Missouri Bank of Kansas City, N.A., 10th and Grand, Kansas City, Missouri 64105,
each serves as custodian of the assets of the funds. The custodians take no part
in  determining  the  investment  policies  of the  funds or in  deciding  which
securities are purchased or sold by the funds. The funds, however, may invest in
certain  obligations  of  the  custodians  and  may  purchase  or  sell  certain
securities from or to the custodians.

INDEPENDENT ACCOUNTANTS

         Beginning  with the 1997 fiscal year,  Delloitte  and Touche LLP,  1010
Grand Avenue,  Kansas City,  Missouri  64106,  has been selected to serve as the
fund's  independent  accountants,  providing services including (1) audit of the
annual financial statements,  (2) assistance and consultation in connection with
SEC filings  and (3) review of the annual  federal  income tax return  filed for
each fund.

CAPITAL STOCK

         The funds'  capital  stock is described in the  prospectuses  under the
caption, "Further Information About American Century."

         American Century may in the future issue additional  series or class of
shares without a vote of  shareholders.  The assets  belonging to each series or
classes of shares are held  separately  by the  custodian and the shares of each
series or class represent a beneficial  interest in the principal,  earnings and
profit (or  losses) of  investments  and other  assets  held for each  series or
class.  Your  rights as a  shareholder  are the same for all  series or class of
securities unless otherwise stated. Within their respective series or class, all
shares have equal redemption rights.  Each share, when issued, is fully-paid and
non-assessable.  Each share, irrespective of series or class, is entitled to one
vote for  each  dollar  of net  asset  value  represented  by such  share on all
questions.

         In the  event  of  complete  liquidation  or  dissolution  of  American
Century,  shareholders  of each  series or class of shares  shall be entitled to
receive,  pro rata,  all of the assets  less the  liabilities  of that series or
class.

         As of January 31, 1997,  in excess of 5% of the  outstanding  shares of
the following funds were owned of record by:

NAME OF                             SHAREHOLDER
FUND                                AND PERCENTAGE
- - ------------------------------------------------------------------------
Growth                              Nationwide Life Insurance Company
                                    Columbus, Ohio -- 13.0%
Ultra                               Charles Schwab & Co.
                                    San Francisco, California -- 8.7%
Vista                               Charles Schwab & Co. -- 6.9%
Heritage                            Charles Schwab & Co. -- 6.2%
                                    Bankers Trust Company as trustee for Kraft
                                    General Foods -- 11.3%
Limited-Term
Tax-Exempt                          Twentieth Century Companies, Inc.-- 14.5%
Long-Term
Tax-Exempt                          Twentieth Century Companies, Inc. -- 6.7%
Limited-Term Bond                   Twentieth Century Companies, Inc. -- 38.3%
Intermediate-Term

                                                                         Page 26

Bond                                Twentieth Century Companies, Inc.-- 17.6%
                                    The Chase Manhattan Bank as Trustee for
                                    Gza Geo Environmental Inc. Restated
                                    401(k) Profit Sharing Plan and Trust
                                    New York, New York -- 6.8%

                                    The Chase Manhattan Bank as trustee for
                                    Fujisawa USA Inc. Savings and Retirement
                                    Plan Trust New York, New York-- 5.2%
Short-Term
Government Fund                     Nationwide Life Insurance Company -- 10.2%
Intermediate-Term
Government Fund                     The Chase Manhattan Bank as Trustee for
                                    Robert Bosch Corporation Star Plan and
                                    Trust New York, New York -- 14.1%
New Opportunities                   Trustees of Twentieth Century Profit
                                    Sharing and 401(k) Savings Distribution
                                    Reinvested Plan and Trust -- 6.2%
- ------------------------------------------------------------------------------

MULTIPLE CLASS STRUCTURE

         The funds'  Board of Directors  has adopted a multiple  class plan (the
"Multiclass  Plan") pursuant to Rule 18f-3 adopted by the SEC.  Pursuant to such
plan,  the funds may issue up to four classes of funds:  an Investor  Class,  an
Institutional  Class, a Service Class and an Advisor Class.  Not all funds offer
all four classes.

         The  Investor  Class is made  available  to  investors  directly by the
investment  manager  through  its  affiliated  broker-dealer,  American  Century
Investment Services, Inc., for a single unified management fee, without any load
or commission. The Institutional, Service and Advisor Classes are made available
to institutional  shareholders or through financial  intermediaries  that do not
require  the same level of  shareholder  and  administrative  services  from the
manager as  Investor  Class  shareholders.  As a result,  the manager is able to
charge these classes a lower  management fee. In addition to the management fee,
however,  Service  Class  shares are  subject  to a  Shareholder  Services  Plan
(described  below),  and the  Advisor  Class  shares  are  subject  to a  Master
Distribution and Shareholder  Services Plan (also described  below).  Both plans
have been adopted by the funds' board of directors  and initial  shareholder  in
accordance with Rule 12b-1 adopted by the SEC under the 1940 Act.

RULE 12B-1

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

         In adopting the Plans, the Board of Directors  (including a majority of
directors who are not "interested  persons" of the funds (as defined in the 1940
Act),  hereafter  referred to as the  "independent  directors")  determined that
there was a reasonable 

                                                                         Page 27

likelihood  that the Plans would benefit the funds and the  shareholders  of the
affected classes.  Pursuant to Rule 12b-1,  information with respect to revenues
and expenses  under the Plans is  presented to the Board of Directors  quarterly
for its consideration in connection with its deliberations as to the continuance
of the  Plans.  Continuance  of the  Plans  must be  approved  by the  Board  of
Directors  (including a majority of the  independent  directors)  annually.  The
Plans may be amended by a vote of the Board of  Directors  (including a majority
of the  independent  directors),  except  that the Plans may not be  amended  to
materially  increase the amount to be spent for  distribution  without  majority
approval  of the  shareholders  of  the  affected  class.  The  Plans  terminate
automatically in the event of an assignment and may be terminated upon a vote of
a  majority  of the  independent  directors  or by  vote  of a  majority  of the
outstanding voting securities of the affected class.

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

SHAREHOLDER SERVICES PLAN

         As described in the  Prospectuses,  the funds'  Service Class of shares
are made available to participants in  employer-sponsored  retirement or savings
plans and to persons purchasing through financial intermediaries, such as banks,
broker-dealers  and  insurance   companies.   In  such  circumstances,   certain
recordkeeping  and  administrative  services  that are  provided  by the  funds'
transfer  agent for the Investor Class  shareholders  may be performed by a plan
sponsor  (or its agents) or by a  financial  intermediary.  To enable the funds'
shares to be made available through such plans and financial intermediaries, and
to compensate them for such services,  the funds' investment manager has reduced
its  management  fee by 0.25% per annum with respect to the Service Class shares
and the funds'  Board of  Directors  has adopted a  Shareholder  Services  Plan.
Pursuant  to the  Shareholder  Services  Plan,  the Service  Class  shares pay a
shareholder services fee of 0.25% annually of the aggregate average daily assets
of the funds' Service Class shares.

         American Century Investment Services,  Inc. (the "Distributor")  enters
into  contracts with each  financial  intermediary  for the provision of certain
shareholder  services and utilizes the shareholder  services fees received under
the Shareholder Services Plan to pay for such services. Payments may be made for
a variety  of  shareholder  services,  including,  but are not  limited  to, (a)
receiving,  aggregating and processing purchase, exchange and redemption request
from beneficial  owners  (including  contract owners of insurance  products that
utilize  the  funds as  underlying  investment  media)  of  shares  and  placing
purchase,  exchange and redemption  orders with the  Distributor;  (b) providing
shareholders  with a service that invests the assets of their accounts in shares
pursuant to specific or  pre-authorized  instructions;  (c) processing  dividend
payments from a fund on behalf of  shareholders  and assisting  shareholders  in
changing dividend options, account designations and addresses; (d) providing and
maintaining  elective services such as check writing and wire transfer services;
(e) acting as  shareholder  of record and nominee  for  beneficial  owners;  (f)
maintaining account records for shareholders and/or other beneficial owners; (g)
issuing 

                                                                         Page 28

confirmations  of  transactions;  (h)  providing  subaccounting  with respect to
shares  beneficially  owned by  customers  of third  parties  or  providing  the
information  to a fund as necessary  for such  subaccounting;  (i) preparing and
forwarding   shareholder   communications  from  the  funds  (such  as  proxies,
shareholder reports,  annual and semi-annual  financial statements and dividend,
distribution and tax notices) to shareholders  and/or other  beneficial  owners;
(j) providing other similar administrative and sub-transfer agency services; and
(k) paying "service fees" for the provision of personal,  continuing services to
investors,   as  contemplated  by  the  Rules  of  Fair  Practice  of  the  NASD
(collectively  referred to as "Shareholder  Services").  Shareholder Services do
not include those activities and expenses that are primarily  intended to result
in the sale of additional shares of the funds.

MASTER DISTRIBUTION AND SHAREHOLDER SERVICES PLAN

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

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

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

         Distribution  services  include  any  activity  undertaken  or  expense
incurred  that is  primarily  intended  to result in the sale of  Advisor  Class
shares,  which  services  may include but are not limited to, (a) the payment of
sales commission,  ongoing  commissions and other payments to brokers,  dealers,
financial  institutions  or others who sell  Advisor  Class  shares  pursuant to
Selling  Agreements;  (b)  compensation to registered  representatives  or other
employees of  Distributor  who engage in or support  distribution  of the funds'
Advisor Class shares; (c) compensation to, and expenses  (including overhead and
telephone  expenses)  of,   Distributor;   (d)  the  printing  of  prospectuses,
statements  of  additional  information  and  reports  for other  than  existing
shareholders; (e) the preparation, printing and distribution of sales literature
and 

                                                                         Page 29

advertising  materials  provided  to the  funds'  shareholders  and  prospective
shareholders;  (f)  receiving  and  answering  correspondence  from  prospective
shareholders,  including  distributing  prospectuses,  statements  of additional
information,  and shareholder reports; (g) the providing of facilities to answer
questions  from  prospective  investors  about fund shares;  (h) complying  with
federal and state  securities  laws  pertaining to the sale of fund shares;  (i)
assisting  investors in completing  application forms and selecting dividend and
other  account  options;  (j) the  providing of other  reasonable  assistance in
connection  with  the  distribution  of  fund  shares;  (k) the  organizing  and
conducting  of  sales  seminars  and  payments  in  the  form  of  transactional
compensation  or promotional  incentives;  (l) profit on the foregoing;  (m) the
payment of "service fees" for the provision of personal,  continuing services to
investors,  as  contemplated  by the Rules of Fair  Practice of the NASD and (n)
such other distribution and services activities as the manager determines may be
paid for by the funds  pursuant to the terms of this Agreement and in accordance
with Rule 12b-1 of the 1940 Act.

BROKERAGE

SELECT,  HERITAGE,  GROWTH, ULTRA, VISTA, GIFTRUST AND THE EQUITY INVESTMENTS OF
BALANCED

         Under the management  agreement between the funds and the manager,  the
manager  has the  responsibility  of  selecting  brokers  to  execute  portfolio
transactions.  The  funds'  policy is to secure  the most  favorable  prices and
execution  of orders on its  portfolio  transactions.  So long as that policy is
met, the manager may take into  consideration  the factors  discussed under this
caption when selecting brokers.

         The manager  receives  statistical  and other  information and services
without cost from brokers and dealers.  The manager  evaluates such  information
and  services,  together  with  all  other  information  that  it may  have,  in
supervising  and managing the investment  portfolios of the funds.  Because such
information  and services  may vary in amount,  quality and  reliability,  their
influence in selecting brokers varies from none to very substantial. The manager
proposes to continue to place some of the funds' brokerage  business with one or
more brokers who provide information and services. Such information and services
will be in addition to and not in lieu of services  required to be  performed by
the manager.  The manager does not utilize brokers that provide such information
and  services  for the purpose of reducing  the  expense of  providing  required
services to the funds.

         In the years  ended  October 31,  1996,  1995 and 1994,  the  brokerage
commissions of each fund were as follows:

                             Years Ended October 31,
- - ------------------------------------------------------------------------
Fund                 1996               1995             1994
- - ------------------------------------------------------------------------
SELECT            $8,157,658        $11,363,976      $14,844,437
HERITAGE           3,093,265          3,180,082        3,620,144
GROWTH            10,712,208         13,577,767       10,144,618
ULTRA             22,985,927         18,911,590       19,240,703
VISTA              2,246,175          1,750,665        1,895,400
GIFTRUST             886,460            571,349          588,145

                                                                         Page 30

BALANCED           1,038,530            875,207          979,903
- - ------------------------------------------------------------------------

         In 1996,  $49,120,223 of the total  brokerage  commissions  was paid to
brokers and dealers who provided  information  and services on  transactions  of
$56,023,070,599 (92% of all transactions).

         The  brokerage  commissions  paid by the funds may exceed  those  which
another broker might have charged for effecting the same  transactions,  because
of the value of the  brokerage  and  research  services  provided by the broker.
Research services  furnished by brokers through whom the funds effect securities
transactions  may be used by the manager in servicing all of its  accounts,  and
not all such  services may be used by the manager in managing the  portfolios of
the funds.

         The staff of the SEC has  expressed  the view  that the best  price and
execution  of  over-the-counter  transactions  in  portfolio  securities  may be
secured by dealing directly with principal  market makers,  thereby avoiding the
payment of compensation to another broker. In certain  situations,  the officers
of the funds and the manager believe that the facilities,  expert  personnel and
technological systems of a broker often enable the funds to secure as good a net
price by dealing with a broker instead of a principal  market maker,  even after
payment  of the  compensation  to the  broker.  The  funds  regularly  place its
over-the-counter transactions with principal market makers, but may also deal on
a brokerage basis when utilizing electronic trading networks or as circumstances
warrant.

CASH RESERVE,  SHORT-TERM  GOVERNMENT FUND,  INTERMEDIATE-TERM  GOVERNMENT FUND,
LIMITED-TERM BOND, INTERMEDIATE-TERM BOND, BENHAM BOND, LIMITED-TERM TAX-EXEMPT,
INTERMEDIATE-TERM   TAX-EXEMPT,   LONG-TERM  TAX-EXEMPT  AND  THE  FIXED  INCOME
INVESTMENTS OF BALANCED

         Under the management  agreement between the funds and the manager,  the
manager  has the  responsibility  of  selecting  brokers  and dealers to execute
portfolio  transactions.  In many  transactions,  the selection of the broker or
dealer  is  determined  by the  availability  of the  desired  security  and its
offering  price. In other  transactions,  the selection of broker or dealer is a
function of the selection of market and the negotiation of price, as well as the
broker's  general  execution and operational  and financial  capabilities in the
type of transaction  involved.  The manager will seek to obtain prompt execution
of orders at the most  favorable  prices or yields.  The  manager  may choose to
purchase and sell portfolio  securities to and from dealers who provide services
or research,  statistical and other information to the funds and to the manager.
Such  information  or  services  will be in  addition  to and not in lieu of the
services  required  to be  performed  by the  manager,  and the  expenses of the
manager  will not  necessarily  be  reduced  as a result of the  receipt of such
supplemental information.

PERFORMANCE ADVERTISING

         Individual  fund   performance  may  be  compared  to  various  indices
including  the Standard & Poor's 500 Index,  the Dow Jones  Industrial  Average,
Donoghue's  Money  Fund  Average  and the Bank Rate  Monitor  National  Index of
21/2-year CD rates.

                                                                         Page 31

EQUITY FUNDS

         The following  table sets forth the average  annual total return of the
equity  funds and Balanced  for the one-,  five- and 10-year  periods (or period
since inception) ended October 31, 1996, the last day of the funds' fiscal year.
Average annual total return is calculated by determining each fund's  cumulative
total return for the stated period and then computing the annual compound return
that would produce the  cumulative  total return if the fund's  performance  had
been constant over that period. Cumulative total return includes all elements of
return, including reinvestment of dividends and capital gains distributions.

                                                 From
Fund             1 year    5 year   10 year  Inception (1)
- - ------------------------------------------------------------------------
SELECT            19.76%   9.67%    11.27%        --
HERITAGE          10.44%  13.27%      --        15.57%
GROWTH             8.18%   9.32%    13.56%        --
ULTRA             10.79%  15.62%    19.92%        --
VISTA              6.96%  14.61%    14.67%        --
GIFTRUST           9.72%  24.31%    21.71%        --
BALANCED          14.04%   8.50%      --        12.21%
- - ------------------------------------------------------------------------
1 Data from inception shown for funds that are less than 10 years old.

         The funds may also  advertise  average annual total return over periods
of time other  than one,  five and 10 years and  cumulative  total  return  over
various time periods.

         The  following  table shows the  cumulative  total return of the equity
funds and Balanced  since their  respective  dates of inception.  The table also
shows  annual  compound  rates for Growth and Select from June 30,  1971,  which
corresponds with the funds'  implementation of its current investment philosophy
and practices and for all other funds from their  respective  dates of inception
(as noted previously) through October 31, 1996.

                 Cumulative Total        Average Annual
Fund          Return Since Inception      Compound Rate
- - ------------------------------------------------------------------------
SELECT              4776.98%                16.58%
HERITAGE             266.32%                15.57%
GROWTH              6728.19%                18.14%
ULTRA               1051.37%                17.70%
VISTA                442.07%                13.96%
GIFTRUST            1109.27%                21.26%
BALANCED             152.24%                12.21%
- - ------------------------------------------------------------------------

FIXED INCOME FUNDS AND BALANCED

         Cash Reserve.  The yield of Cash Reserve is calculated by measuring the
income  generated by an investment  in the fund over a seven-day  period (net of
fund expenses).  This income is then "annualized." That is, the amount of income
generated by the investment over the seven-day period is assumed to be generated
over each similar period  throughout a full year and is shown as a percentage of
the  investment.  The  "effective  yield" is calculated in a similar manner but,
when  annualized,  the  income  earned  by  the  investment  is  assumed  to  be
reinvested. The effective yield will be

                                                                         Page 32

slightly higher than the yield because of the compounding  effect of the assumed
reinvestment.

         Based upon these methods of computation,  the yield and effective yield
for Cash Reserve for the seven days ended October 31, 1996,  the last seven days
of the fund's fiscal year, was 4.74% and 4.85%, respectively.

         Other Fixed Income Funds and  Balanced.  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 following  table sets forth yield  quotations  for the fixed income
funds (other than Cash Reserve) and Balanced for the 30-day period ended October
31,  1996,  the last day of the fiscal  year  pursuant  to  computation  methods
prescribed by the SEC.

                                                    Intermediate-
  Short-Term     Intermediate-Term  Limited-Term        Term
Government Fund   GovernmentFund       Bond             Bond
- - ------------------------------------------------------------------------
     5.36%            5.68%            5.55%           6.31%
- - ------------------------------------------------------------------------
                               Intermediate-
 Benham       Limited-Term         Term       Long-Term      Balanced
  Bond         Tax-Exempt       Tax-Exempt   Tax-Exempt
- - ------------------------------------------------------------------------
  6.30%          3.69%            4.34%        4.80%          2.29%
- - ------------------------------------------------------------------------

         The  following   table  sets  forth   tax-equivalent   yields  for  the
Limited-Term   Tax-Exempt,   Intermediate-Term   Tax-Exempt  and  the  Long-Term
Tax-Exempt  funds for the 30-day  period  ended  October 31,  1996.  The example
assumes a 36% tax rate. The tax-equivalent yield is computed as follows:

tax-
equivalent =     tax-exempt yield   + non tax-exempt yield
yield           ------------------
                1-assumed tax rate

Tax-Exempt        Tax-Exempt        Tax-Exempt
Short-Term    Intermediate-Term     Long-Term
- - ----------------------------------------------------
     5.77%        6.78%               7.50%
- - ----------------------------------------------------

         The fixed  income funds may also elect to  advertise  cumulative  total
return and average annual total return,  computed as described  above. The table
below shows the  cumulative  total return and the average annual total return of
the fixed  income  funds since their  respective  dates of  inception  (as noted
below) through October 31, 1996.

                           Cumulative
                           Total Return     Average Annual    Date of
FUND                       Since Inception  Total Return      Inception

                                                                         Page 33

- - ------------------------------------------------------------------------
SHORT-TERM
GOVERNMENT FUND            167.78%          7.36%             12/15/82
INTERMEDIATE-TERM
GOVERNMENT FUND             15.01%          5.38%               3/1/94
LIMITED-TERM BOND           14.77%          5.30%               3/1/94
INTERMEDIATE-TERM BOND      16.74%          5.97%               3/1/94
BENHAM BOND                104.68%          7.69%               3/2/87
LIMITED-TERM
TAX-EXEMPT                  16.40%          4.23%               3/1/93
INTERMEDIATE-TERM
TAX-EXEMPT                  74.65%          5.94%               3/2/87
LONG-TERM TAX-EXEMPT        94.55%          7.13%               3/2/87
- - ------------------------------------------------------------------------

ADDITIONAL PERFORMANCE COMPARISONS

         Investors  may judge the  performance  of the funds by comparing  their
performance to the  performance of other mutual funds or mutual fund  portfolios
with comparable  investment  objectives and policies through various mutual fund
or market  indices such as the EAFE(R)  Index and those  prepared by Dow Jones &
Co., Inc., Standard & Poor's Corporation, Shearson Lehman Brothers, Inc. and The
Russell 2000 Index, and to data prepared by Lipper  Analytical  Services,  Inc.,
Morningstar,  Inc. and the Consumer Price Index. Comparisons may also be made to
indices or data published in Money, Forbes,  Barron's,  The Wall Street Journal,
The New York Times,  Business Week,  Pensions and  Investments,  USA Today,  and
other similar publications or services. In addition to performance  information,
general  information about the funds that appears in a publication such as those
mentioned above or in the Prospectus under the heading "Performance Advertising"
may be included in advertisements and in reports to shareholders.

PERMISSIBLE ADVERTISING INFORMATION

         From time to time, the funds may, in addition to any other  permissible
information,  include the  following  types of  information  in  advertisements,
supplemental  sales literature and reports to  shareholders:  (1) discussions of
general economic or financial principles (such as the effects of compounding and
the benefits of dollar-cost  averaging);  (2)  discussions  of general  economic
trends;  (3)  presentations of statistical data to supplement such  discussions;
(4)  descriptions of past or anticipated  portfolio  holdings for one or more of
the funds;  (5)  descriptions  of investment  strategies  for one or more of the
funds;  (6)  descriptions  or  comparisons  of various  savings  and  investment
products  (including,  but  not  limited  to,  qualified  retirement  plans  and
individual  stocks and  bonds),  which may or may not  include  the  funds;  (7)
comparisons of investment products (including the funds) with relevant market or
industry  indices  or other  appropriate  benchmarks;  (8)  discussions  of fund
rankings or ratings by recognized  rating  organizations;  and (9)  testimonials
describing  the  experience  of persons that have invested in one or more of the
funds. The funds may also include calculations, such as hypothetical compounding
examples, which describe hypothetical investment results in such communications.
Such performance examples will be based on an 

                                                                         Page 34

express set of assumptions  and are not indicative of the  performance of any of
the funds.

REDEMPTIONS IN KIND

         The funds' policy with regard to redemptions in excess of the lesser of
one half of 1% of a fund's assets or $250,000 from its equity funds and Balanced
is  described  in the  applicable  fund  prospectus  under the heading  "Special
Requirements for Large Redemptions."

         The  funds  have  elected  to be  governed  by  Rule  18f-1  under  the
Investment  Company  Act,  pursuant to which the funds are  obligated  to redeem
shares  solely in cash up to the lesser of $250,000 or 1% of the net asset value
of the fund  during any 90-day  period  for any one  shareholder.  If shares are
redeemed in kind,  the  redeeming  shareholder  might incur  brokerage  costs in
converting the assets to cash. The method of valuing  portfolio  securities used
to make redemptions in kind will be the same as the method of valuing  portfolio
securities  described  in the  Prospectus  under the caption "How Share Price is
Determined,"  and such valuation will be made as of the same time the redemption
price is determined.

HOLIDAYS

         The funds do not  determine  the net asset  value of its shares on days
when the New York Stock Exchange is closed. Currently, the Exchange is closed on
Saturdays and Sundays,  and on holidays,  namely New Year's Day, Presidents Day,
Good  Friday,  Memorial  Day,  Independence  Day,  Labor Day,  Thanksgiving  and
Christmas.

FINANCIAL STATEMENTS

         The financial  statements  of the various  series of shares of American
Century  (other than New  Opportunities)  for the fiscal year ended  October 31,
1996, are included in the annual report to  shareholders,  which is incorporated
herein by reference.  You may receive  copies of the report  without charge upon
request to American  Century at the address and phone  number shown on the cover
of this Statement of Additional Information.

         The   unaudited   financial   statements   of  Twentieth   Century  New
Opportunities  for the period from December 26, 1996  (inception) to January 31,
1997 are  included  in this  Statement  of  Additional  Information.  While  the
financial statements respecting such fund contained herein are unaudited, in the
opinion of the manager, all adjustments necessary for a fair presentation of the
financial  position and the results of operation at January 31, 1997 and for the
period from December 26, 1996  (inception) to January 31, 1997,  have been made.
The  results  of  operations  for  the  period  indicated  are  not  necessarily
indicative of the results for an entire year.

                                                                         Page 35

STATEMENT OF ASSETS AND LIABILITIES

                                                                  NEW
JANUARY 31, 1997 (Unaudited)                                  OPPORTUNITIES
- --------------------------------------------------------------------------------

ASSETS

Investment securities,
   at value (identified cost of $119,093,317)
   (Note 3) ................................................  $119,847,813
Cash .......................................................     5,029,586
Receivable for capital shares sold .........................       124,235
Dividends and interest receivable ..........................         2,340
                                                                 ---------
                                                               125,003,974
                                                                ----------

LIABILITIES

Payable for investments purchased ..........................    21,621,743
Accrued management fees (Note 2) ...........................        44,058
Other liabilities ..........................................           128
                                                                ----------
                                                                21,665,929
                                                                ----------
Net Assets Applicable to Outstanding Shares ................  $103,338,045
                                                              ============

CAPITAL SHARES, $.01 PAR VALUE

Authorized .................................................   100,000,000
                                                               ===========

Outstanding ................................................    20,840,529
                                                               ===========


Net Asset Value Per Share ..................................         $4.96
                                                               ===========

NET ASSETS CONSIST OF:

Capital (par value and paid-in surplus) ....................  $103,044,301
Undistributed net investment income ........................        27,913
Accumulated undistributed net realized
   (loss) from investment transactions .....................      (488,665)
Net unrealized appreciation on investments (Note 3) ........       754,496
                                                                ----------
                                                              $103,338,045

See Notes to Financial Statements

                                                                         Page 36


                            STATEMENT OF OPERATIONS

DECEMBER 26, 1996 (INCEPTION)                                      NEW
THROUGH JANUARY 31, 1997 (Unaudited)                          OPPORTUNITIES
- --------------------------------------------------------------------------------

INVESTMENT INCOME

Income:
     Interest ..............................................    $70,129
     Dividends .............................................      2,340
                                                             ----------
                                                                 72,469
                                                             ----------
Expenses:
     Management fees (Note 2) ..............................     44,428
     Directors' fees and expenses ..........................        128
                                                             ----------
                                                                 44,556
                                                             ----------
Net investment income ......................................     27,913
                                                             ----------



REALIZED AND UNREALIZED GAIN ON
INVESTMENTS (NOTE 3)
     Net realized (loss) ...................................   (488,665)
     Change in net unrealized appreciation .................    754,496
                                                             ----------
Net realized and unrealized gain on investments ............    265,831
                                                             ----------
Net Increase in Net Assets Resulting from Operations .......   $293,744



See Notes to Financial Statements

                                                                         Page 37

                       STATEMENT OF CHANGES IN NET ASSETS



DECEMBER 26, 1996 (INCEPTION)                                NEW
THROUGH JANUARY 31, 1997 (Unaudited)                    OPPORTUNITIES
- --------------------------------------------------------------------------------

Increase in Net Assets

OPERATIONS

Net investment income .........................................   $      27,913
Net realized (loss) on investments ............................        (488,665)
Change in net unrealized appreciation on investments ..........         754,496
                                                                  -------------
Net increase in net assets resulting from operations                    293,744
                                                                  -------------

CAPITAL SHARE TRANSACTIONS

Proceeds from shares sold
                                                                    103,105,758
Payments for shares redeemed ..................................         (61,457)
                                                                  -------------
Net increase in net assets
   from capital share transactions ............................     103,044,301
                                                                  -------------
Net increase in net assets ....................................     103,338,045

NET ASSETS

Beginning of period ...........................................            --
                                                                  -------------
End of period .................................................   $ 103,338,045
                                                                  =============

Undistributed net investment income ...........................   $      27,913
                                                                  =============

TRANSACTIONS IN SHARES OF THE FUND

Sold
                                                                     20,852,883
Redeemed ......................................................         (12,354)
                                                                  -------------
Net increase ..................................................   $  20,840,529



See Notes to Financial Statements

                                                                         Page 38


                         NOTES TO FINANCIAL STATEMENTS

JANUARY 31, 1997 (UNAUDITED)

1. ORGANIZATION AND SUMMARY OF SIGNIFICANT
    ACCOUNTING POLICIES

     ORGANIZATION -- American  Century Mutual Funds,  Inc. (the  Corporation) is
registered under the Investment  Company Act of 1940 as an open-end  diversified
management investment company. Twentieth Century New Opportunities (the Fund) is
one of the  seventeen  series of funds  issued by the  Corporation.  The  Fund's
investment objective is capital growth. The Fund seeks to achieve its investment
objective  by  investing  primarily  in common  stocks  that are  considered  by
management to have better-than-average prospects for appreciation. The following
significant  accounting  policies,  related to the Fund, are in accordance  with
accounting policies generally accepted in the investment company industry.

     SECURITY VALUATIONS -- Portfolio securities traded primarily on a principal
securities  exchange are valued at the last reported sales price, or the mean of
the  latest  bid and  asked  prices  where no last  sales  price  is  available.
Securities traded  over-the-counter are valued at the mean of the latest bid and
asked prices or, in the case of certain foreign securities, at the last reported
sales price,  depending on local  convention or regulation.  When valuations are
not readily  available,  securities  are valued at fair value as  determined  in
accordance with procedures adopted by the Board of Directors.

     SECURITY  TRANSACTIONS  -- Security  transactions  are accounted for on the
date  purchased or sold.  Net realized  gains and losses are  determined  on the
identified cost basis, which is also used for federal income tax purposes.

     INVESTMENT INCOME -- Dividend income, less foreign taxes withheld (if any),
is  recorded  as of the  ex-dividend  date.  Interest  income is recorded on the
accrual basis and includes amortization of discounts and premiums.

     REPURCHASE AGREEMENTS -- The Fund may enter into repurchase agreements with
institutions that the Fund's  investment  manager,  American Century  Investment
Management,  Inc. (ACIM),  has determined are creditworthy  pursuant to criteria
adopted by the Board of  Directors.  Each  repurchase  agreement  is recorded at
cost.  The  Fund  requires  that  the  securities   purchased  in  a  repurchase
transaction be transferred to the custodian in a manner sufficient to enable the
Fund to obtain those  securities in the event of a default under the  repurchase
agreement.  ACIM  monitors,  on a  daily  basis,  the  value  of the  securities
transferred  to  ensure  that the  value,  including  accrued  interest,  of the
securities  under each repurchase  agreement is equal to or greater than amounts
owed to the Fund under each repurchase agreement.

     JOINT  TRADING  ACCOUNT -- Pursuant  to an  Exemptive  Order  issued by the
Securities  and  Exchange  Commission,  the Fund,  along with  other  registered
investment   companies  having  management   agreements  with  ACIM  and  Benham
Management  Corporation,  may transfer  uninvested  cash  balances  into a joint
trading  account.  These  balances  are  invested  in  one  or  more  repurchase
agreements that are collaterized by U.S. Treasury or Agency obligations.

     INCOME TAX STATUS -- It is the policy of the Fund to distribute all taxable
income and capital gains to shareholders and to otherwise qualify as a regulated
investment  company under provisions of the Internal Revenue Code.  Accordingly,
no provision has been made for federal income taxes.

     DISTRIBUTIONS TO SHAREHOLDERS -- Distributions to shareholders are recorded
on the  ex-dividend  date.  Distributions  from net  investment  income  and net
realized gains are declared and paid annually.

     The  character of  distributions  made during the year from net  investment
income or net realized gains may differ from their ultimate characterization for
federal income tax purposes.  These differences are primarily due to differences
in the  recognition of income and expense items for financial  statement and tax
purposes.

                                                                         Page 39

     SUPPLEMENTARY   INFORMATION  --  Certain  officers  and  directors  of  the
Corporation are also officers  and/or  directors,  and, as a group,  controlling
stockholders   of  American   Century   Companies,   Inc.,  the  parent  of  the
Corporation's investment manager, ACIM, the Corporation's distributor,  American
Century  Investment  Services,  Inc.,  and  the  Corporation's  transfer  agent,
American Century Services Corporation.

     USE OF ESTIMATES -- The  preparation of financial  statements in conformity
with  generally  accepted  accounting  principles  requires  management  to make
estimates  and  assumptions  that  affect  the  reported  amounts  of assets and
liabilities  and disclosure of contingent  assets and liabilities at the date of
the financial statements, and the reported amounts of increases and decreases in
net assets from  operations  during the reporting  period.  Actual results could
differ from those estimates.

2. TRANSACTIONS WITH RELATED PARTIES

     The  Corporation  has entered  into a Management  Agreement  with ACIM that
provides the Fund with investment  advisory and management  services in exchange
for a single, unified fee. The Agreement provides that all expenses of the Fund,
except brokerage commissions,  taxes, interest,  expenses of those directors who
are not considered "interested persons" as defined in the Investment Company Act
of 1940 (including  counsel fees) and  extraordinary  expenses,  will be paid by
ACIM.  The fee is computed  daily and paid monthly  based on the Fund's  average
daily closing net assets during the previous  month.  The annual  management fee
for the Fund is 1.5%.

3. INVESTMENT TRANSACTIONS

     The aggregate cost of investment securities purchased (excluding short-term
investments)  for the period December 26, 1996  (inception)  through January 31,
1997, totaled $90,556,978 for common stocks. Proceeds from investment securities
sold (excluding short-term investments) totaled $2,065,528 for common stocks. As
of January 31, 1997, accumulated net unrealized  appreciation on investments was
$754,496,  consisting of unrealized  appreciation  of $2,651,084  and unrealized
depreciation of $1,896,588. The aggregate cost of investments for federal income
tax purposes was the same as the cost for financial reporting purposes.

4. AFFILIATED COMPANY TRANSACTIONS

     A summary of transactions  for each issuer who is or was an affiliate at or
during the period  December  26, 1996  (inception)  through  January  31,  1997,
follows:



                                                JANUARY 31, 1997
                                        --------------------------------
ISSUER                     PURCHASE         SHARE             MARKET
                           COST             BALANCE           VALUE
- - ------------------------------------------------------------------------
Brightpoint, Inc.        $ 2,238,278        80,300         $  2,263,456
NBTY Inc.                  1,687,018        82,400            1,761,300
Pomeroy Computer
Resources, Inc.            1,761,427        53,900            1,677,638
Rational Software Corp.    3,269,444       113,200            2,851,225
Teledata Communication
Ltd.                       1,715,977        64,500            1,685,063
- - ------------------------------------------------------------------------
                         $10,672,144                        $10,238,682
- - ------------------------------------------------------------------------

                                                                         Page 40




     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-7971       Recycled

                                                                         Page 41
<PAGE>
PART C.  OTHER INFORMATION.

ITEM 24.  Financial Statements and Exhibits.

(a)  Financial Statements

  (i)      Financial Statements filed in Part A of the Registration Statement:

           1.  None.

  (ii)     Financial Statements filed in Part B of the Registration Statement:

           1.  None.

(b)  Exhibits (all exhibits not filed herewith are being incorporated  herein by
     reference)

           1. (a) Articles of Incorporation of Twentieth Century Investors,
                  Inc., dated July 2, 1990 (filed electronically as an Exhibit
                  to Post-Effective Amendment No. 73 on Form N-1A on February
                  29, 1996, File No. 2-14213).

              (b) Articles of Amendment of Twentieth Century Investors, Inc.,
                  dated November 20, 1990 (filed electronically as an Exhibit to
                  Post-Effective Amendment No. 73 on Form N-1A on February 29,
                  1996, File No. 2-14213).

              (c) Articles of Merger of Twentieth Century Investors, Inc., a
                  Maryland corporation and Twentieth Century Investors, Inc.,
                  a Delaware corporation, dated February 22, 1991 (filed
                  electronically as an Exhibit to Post-Effective Amendment No.
                  73 on Form N-1A on February 29, 1996, File No. 2-14213).

              (d) Articles of Amendment of Twentieth Century Investors, Inc.,
                  dated August 11, 1993 (filed electronically as an Exhibit to
                  Post-Effective Amendment No. 73 on Form N-1A on February 29,
                  1996, File No. 2-14213).

              (e) Articles Supplementary of Twentieth Century Investors, Inc.,
                  dated September 3, 1993 (filed electronically as an Exhibit
                  to Post-Effective Amendment No. 73 on Form N-1A on February
                  29, 1996, File No. 2-14213).

              (f) Articles Supplementary of Twentieth Century Investors, Inc.,
                  dated April 28, 1995 (filed electronically as an Exhibit
                  to Post-Effective Amendment No. 73 on Form N-1A on February
                  29, 1996, File No. 2-14213).

              (g) Articles Supplementary of Twentieth Century Investors, Inc.,
                  dated November 17, 1995 (filed electronically as an Exhibit
                  to Post-Effective Amendment No. 73 on Form N-1A on February
                  29, 1996, File No. 2-14213).

              (h) Articles Supplementary of Twentieth Century Investors, Inc.,
                  dated January 30, 1996 (filed electronically as an Exhibit
                  to Post-Effective Amendment No. 73 on Form N-1A on February
                  29, 1996, File No. 2-14213).

              (i) Articles  Supplementary of Twentieth Century Investors,  Inc.,
                  dated  March 11,  1996  (filed  electronically  as an  Exhibit
                  to Post-Effective Amendment No. 75 on Form N-1A on June 14,
                  1996.).

              (j) Articles of Amendment of Twentieth  Century  Investors,  Inc.,
                  dated December 2, 1996 (filed  electronically as an Exhibit to
                  Post-Effective  Amendment  No. 76 on Form N-1A on February 28,
                  1997.).

              (k) Articles Supplementary of American Century Mutual Funds, Inc.,
                  dated December 2, 1996 (filed electronically  as an  Exhibit
                  to Post-Effective Amendment No. 76 on Form N-1A on February 
                  28, 1997).

              (l) Articles Supplementary of American Century Mutual Funds, Inc.,
                  dated  July  __,   1997  (to  be  filed  with   post-effective
                  amendment).

           2. By-laws of Twentieth Century Investors, Inc. (filed electronically
              as an Exhibit to Post-Effective Amendment No. 73 on Form N-1A on
              February 29, 1996, File No. 2-14213).

           3. Voting Trust Agreements - None.

           4. Specimen copy of stock certificate - all series (filed 
              electronically as an  Exhibit to Post-Effective Amendment No. 76 
              on Form N-1A on February 28, 1997.).

           5. (a) Management Agreement between Twentieth Century Investors, Inc.
                  and  Investors  Research  Corporation  dated  August 1,  1994
                  (filed  electronically  as  an  Exhibit  to  Post-Effective
                  Amendment No. 75 on Form N-1A on June 14, 1996).

              (b) Addendum to Management  Agreement  between  Twentieth Century
                  Investors,  Inc.  and Investors  Research  Corporation  dated
                  August  1,  1996  (filed  electronically  as an  Exhibit  to
                  Post-Effective  Amendment  No.  75 on Form  N-1A on June 14,
                  1996).

              (c) Management  Agreement-Advisor Class between Twentieth Century
                  Investors,  Inc. and  Investors  Research  Corporation  dated
                  September  1, 1996  (filed  electronically  as an Exhibit to
                  Post-Effective  Amendment  No.  75  on Form  N-1A on June 14,
                  1996).

              (d) Management Agreement-Service Class between Twentieth Century
                  Investors,  Inc. and Investors  Research  Corporation  dated
                  September  1, 1996  (filed  electronically  as an Exhibit to
                  Post-Effective  Amendment  No.  75 on Form  N-1A on June 14,
                  1996).

              (e) Management  Agreement-Institutional  Class between Twentieth
                  Century Investors,  Inc. and Investors Research  Corporation
                  dated September 1, 1996 (filed  electronically as an Exhibit
                  to Post-Effective  Amendment No. 75 on Form N-1A on June 14,
                  1996).

              (f) Management Agreement between American Century Mutual Funds, 
                  Inc. and American Century Investment Management, Inc. dated 
                  August 1, 1997 (to be filed with post-effective amendment.)

           6. (a) Distribution Agreement between TCI Portfolios, Inc.,
                  Twentieth Century Capital Portfolios, Inc., Twentieth Century
                  Investors, Inc., Twentieth Century Premium Reserves, Inc.,
                  Twentieth Century Strategic Asset Allocations, Inc., Twentieth
                  Century World Investors, Inc. and Twentieth Century 
                  Securities, Inc. dated September 3, 1996 (filed as Exhibit 6.1
                  to Post-Effective Amendment No. 21 to the Registration 
                  Statement on Form N-1A of American Century Variable 
                  Portfolios, Inc., Commission File No. 811-5188).

              (b) Amendment No. 1 to Distribution Agreement between American
                  Century Variable Portfolios, Inc., American Century Capital
                  Portfolios, Inc., American Century Mutual Funds, Inc.,
                  American Century Premium Reserves, Inc., American Century
                  Strategic Asset Allocations, Inc., American Century World
                  Mutual Funds, Inc. and American Century Investment Services,
                  Inc. dated June 13, 1997 (filed as Exhibit 6.2 to Post-
                  Effective Amendment No. 21 to the Registration Statement on
                  Form N-1A of American Century Variable Portfolios, Inc.,
                  Commission File No. 811-5188).

           7. Bonus and Profit Sharing Plan, Etc. - None.

           8. (a) Custodian Agreement dated September 21, 1994 for ACH
                  transactions, between Twentieth Century Investors, Inc. and
                  United Missouri Bank of Kansas City, N.A. (filed herewith as
                  EX-99.B8a).

              (b) Custody Agreement dated September 12, 1995, between UMB Bank,
                  N.A., Investors Research Corporation, Twentieth Century
                  Investors, Inc., Twentieth Century World Investors, Inc.,
                  Twentieth Century Premium Reserves, Inc. and Twentieth Century
                  Capital Portfolios, Inc. (filed electronically as an Exhibit
                  to Pre-Effective Amendment No. 4 on Form N-1A of Twentieth
                  Century Strategic Asset Allocations, Inc., Commission File No.
                  33-79482).

              (c) Amendment No. 1 to Custody Agreement dated January 25, 1996,
                  between UMB Bank, N.A., Investors Research Corporation,
                  Twentieth Century Investors, Inc., Twentieth Century World
                  Investors, Inc., Twentieth Century Premium Reserves, Inc.,
                  Twentieth Century Capital Portfolios, Inc. and Twentieth
                  Century Strategic Asset Allocations, Inc.(filed electronically
                  as an Exhibit to Pre-Effective Amendment No. 4 on Form N-1A of
                  Twentieth Century Strategic Asset Allocations, Inc.,
                  Commission File No. 33-79482).

              (d) Amendment No. 2 to Custody Agreement dated June 4, 1997,
                  between UMB Bank, N.A., American Century Investment
                  Management, Inc., American Century Mutual Funds, Inc.,
                  American Century World Mutual Funds, Inc., American Century
                  Variable Portfolios, Inc., American Century Capital
                  Portfolios, Inc. and American Century Strategic Asset
                  Allocations, Inc. (filed herewith as EX-99.B8d)

              (e) Global Custody Agreement between The Chase Manhattan Bank
                  and the Twentieth Century and Benham funds, dated August 9,
                  1996. (filed electronically as an Exhibit to Post-Effective
                  Amendment No. 31 on Form N-1A of American Century Government
                  Income Trust, Commission File No. 2-99222).

              (f) Master Agreement between Commerce Bank, N.A. and Twentieth
                  Century Services, Inc. dated January 22, 1997 (filed
                  electronically as an Exhibit to Post-Effective Amendment No.
                  76 on Form N-1A on February 28, 1997).

           9.  Transfer Agency Agreement between Twentieth Century Investors,
               Inc. and Twentieth Century Services, Inc. dated March 1, 1991
               (filed electronically as an Exhibit to Post-Effective Amendment
               No. 76 on Form N-1A on February 28, 1997).

          10.  Opinion and Consent of Counsel (filed herewith as EX-99.B10).

          11.  Consent of Auditors - None.

          12.  Annual Report - None.

          13.  Agreements for Initial Capital, Etc. -  None.

          14.  Model Retirement Plans (filed on May 6, 1991, as Exhibits
               14(a)-(d) to Pre-Effective Amendment No. 2 to the Registration
               Statement on Form N-1A of Twentieth Century World Investors, 
               Inc., Commission File No. 33-39242).

          15. (a) Master Distribution and Shareholder Services Plan of
                  Twentieth Century Capital Portfolios, Inc., Twentieth Century
                  Investors, Inc., Twentieth Century Strategic Asset
                  Allocations, Inc. and Twentieth Century World Investors, Inc.
                  (Advisor Class) dated September 3, 1996 (filed electronically
                  as an Exhibit to Post-Effective Amendment No. 75 on Form
                  N-1A on June 14, 1996).

              (b) Amendment No. 1 to Master Distribution and Shareholder 
                  Services Plan of American Century Capital Portfolios, Inc., 
                  American Century Mutual Funds, Inc., American Century 
                  Strategic Asset Allocations, Inc. and American Century World 
                  Mutual Funds, Inc.(Advisor Class) dated June 13, 1997 (filed 
                  herewith as EX-99.B15b).

              (c) Shareholder Services Plan of Twentieth Century Capital
                  Portfolios, Inc., Twentieth Century Investors, Inc., Twentieth
                  Century Strategic Asset Allocations, Inc. and Twentieth
                  Century World Investors, Inc. (Service Class) dated September
                  3, 1996 (filed electronically as an Exhibit to Post-Effective
                  Amendment No. 75 on Form N-1A on June 14, 1996).


          16. Schedules For Computation of Advertising Performance Quotations 
              - None.

          17. Power of Attorney (filed electronically as an Exhibit to Post-
              Effective Amendment No. 76 on Form N-1A on February 28, 1997).

          18. (a) Multiple Class Plan of Twentieth Century Capital Portfolios,
                  Inc., Twentieth Century Investors, Inc., Twentieth Century 
                  Strategic Asset Allocations, Inc. and Twentieth Century World 
                  Investors, Inc. dated September 3, 1996 (filed electronically 
                  as an Exhibit to Post-Effective Amendment to No. 75 on Form 
                  N-1A on June 14, 1996).

              (b) Amendment No. 1 to Multiple Class Plan of American Century
                  Capital Portfolios, Inc., American Century Mutual Funds,
                  Inc., American Century Strategic Asset Allocations, Inc. and
                  American Century World Mutual Funds, Inc. dated June 13,
                  1997 (filed herewith as EX-99.B18b).

          27. Financial Data Schedule For Benham High Yield Fund (EX-27.5.18).

ITEM 25. Persons Controlled by or Under Common Control with Registrant - None.

ITEM 26. Number of Holders of Securities - The High Yield Fund has no holders of
         securities.

ITEM 27. Indemnification.

     The  Corporation  is a Maryland  corporation.  Section 2-418 of the General
     Corporation Law of Maryland allows a Maryland  corporation to indemnify its
     directors,  officers,  employees and agents to the extent  provided in such
     statute.

     Article   Eighth   of  the   Articles   of   Incorporation   requires   the
     indemnification  of the corporation's  directors and officers to the extent
     permitted  by the  General  Corporation  Law of  Maryland,  the  Investment
     Company Act and all other applicable laws.

     The registrant has purchased an insurance  policy insuring its officers and
     directors against certain liabilities which such officers and directors may
     incur while acting in such  capacities and providing  reimbursement  to the
     registrant  for sums which it may be  permitted  or  required to pay to its
     officers and directors by way of indemnification  against such liabilities,
     subject  in  either   case  to   clauses   respecting   deductibility   and
     participation.

ITEM 28. Business and Other Connections of Investment Advisor.

     American Century Investment  Management,  Inc., the investment  advisor, is
     engaged in the business of managing  investments for deferred  compensation
     plans and other institutional investors.

ITEM 29. Principal Underwriters - None.

ITEM 30. Location of Accounts and Records.

     All  accounts,  books and other  documents  required  to be  maintained  by
     Section 31(a) of the 1940 Act, and the rules promulgated thereunder, are in
     the possession of American  Century Mutual Funds,  Inc.,  American  Century
     Services Corporation and American Century Investment Management,  Inc., all
     located at American Century Tower, 4500 Main Street, Kansas City, Missouri
     64111.

ITEM 31. Management Services - None.

ITEM 32. Undertakings
     a.  Not Applicable.
     b.  The Registrant hereby undertakes to file a Post-Effective Amendment to
         this Registration Statement, using reasonably current financial
         statements which need not be certified, within four to six months from
         the effective date of the Registrant's 1933 Act Registration Statement.
     c.  Registrant   hereby  undertakes  to  furnish  each  person  to  whom  a
         prospectus is delivered a copy of Registrant's  latest annual report to
         shareholders, upon request and without charge.
     d.  The Registrant hereby undertakes that it will, if requested to do so by
         the  holders of at least 10% of the  Registrant's  outstanding  shares,
         call a meeting  of  shareholders  for the  purpose  of voting  upon the
         question  of the removal of a director  and to assist in  communication
         with other shareholders as required by Section 16(c).
<PAGE>
                                   SIGNATURES

     Pursuant  to  the  requirements  of the  Securities  Act of  1933  and  the
Investment  Company  Act  of  1940,  Twentieth  Century  Investors,   Inc.,  the
Registrant,  has  duly  caused  this  Post-Effective  Amendment  No.  77 to  its
Registration Statement to be signed on its behalf by the undersigned,  thereunto
duly authorized, in the City of Kansas City, State of Missouri on the 17th day
of July, 1997.

                                        American Century Mutual Funds, Inc.
                                        (Registrant)

                                        By: /s/James E. Stowers III
                                            James E. Stowers III, President

     Pursuant  to  the   requirements  of  the  Securities  Act  of  1933,  this
Post-Effective  Amendment No. 77 has been signed below by the following  persons
in the capacities and on the dates indicated.

Signature                     Title                           Date

*James E. Stowers, Jr.        Chairman, Director and          July 17, 1997
James E. Stowers, Jr.         Principal Executive Officer

*James E. Stowers III         President and Director          July 17, 1997
James E. Stowers III

*Robert T. Jackson            Executive Vice President        July 17, 1997
Robert T. Jackson             and Principal Financial Officer

*Maryanne Roepke              Vice President, Treasurer and   July 17, 1997
Maryanne Roepke               Principal Accounting Officer

*Thomas A. Brown              Director                        July 17, 1997
Thomas A. Brown

*Robert W. Doering, M.D.      Director                        July 17, 1997
Robert W. Doering, M.D.

*Linsley L. Lundgaard         Director                        July 17, 1997
Linsley L. Lundgaard

*Donald H. Pratt              Director                        July 17, 1997
Donald H. Pratt

*Lloyd T. Silver, Jr.         Director                        July 17, 1997
Lloyd T. Silver, Jr.

*M. Jeannine Strandjord       Director                        July 17, 1997
M. Jeannine Strandjord

*D. D. (Del) Hock             Director                        July 17, 1997
D. D. (Del) Hock

*By /s/James E. Stowers III
    James E. Stowers III
    Attorney-in-Fact

                                  EXHIBIT INDEX


EXHIBIT      DESCRIPTION OF DOCUMENT
NUMBER

EX-99.B1a    Articles of Incorporation  of Twentieth  Century  Investors,  Inc.,
             dated July 2, 1990.  (filed as a part of  Post-Effective  Amendment
             No.  73  to  the  Registration   Statement  on  Form  N-1A  of  the
             Registrant,  Commission  File No.  2-14213,  filed on February  29,
             1996, and incorporated herein by reference.)

EX-99.B1b    Articles of Amendment of Twentieth Century  Investors,  Inc., dated
             November 20, 1990. (filed as a part of Post-Effective Amendment No.
             73 to the  Registration  Statement on Form N-1A of the  Registrant,
             Commission  File No.  2-14213,  filed on  February  29,  1996,  and
             incorporated herein by reference.)

EX-99.B1c    Articles of Merger of Twentieth Century Investors, Inc., a Maryland
             corporation  and  Twentieth  Century  Investors,  Inc.,  a Delaware
             corporation,   dated  February  22,  1991.  (filed  as  a  part  of
             Post-Effective  Amendment No. 73 to the  Registration  Statement on
             Form N-1A of the Registrant,  Commission File No. 2-14213, filed on
             February 29, 1996, and incorporated herein by reference.)

EX-99.B1d    Articles of Amendment of Twentieth Century  Investors,  Inc., dated
             August 11, 1993. (filed as a part of  Post-Effective  Amendment No.
             73 to the  Registration  Statement on Form N-1A of the  Registrant,
             Commission  File No.  2-14213,  filed on  February  29,  1996,  and
             incorporated herein by reference.)

EX-99.B1e    Articles Supplementary of Twentieth Century Investors,  Inc., dated
             September 3, 1993. (filed as a part of Post-Effective Amendment No.
             73 to the  Registration  Statement on Form N-1A of the  Registrant,
             Commission  File No.  2-14213,  filed on  February  29,  1996,  and
             incorporated herein by reference.)

EX-99.B1f    Articles Supplementary of Twentieth Century Investors,  Inc., dated
             April 28, 1995. (filed as a part of Post-Effective Amendment No. 73
             to the  Registration  Statement  on Form  N-1A  of the  Registrant,
             Commission  File No.  2-14213,  filed on  February  29,  1996,  and
             incorporated herein by reference.)

EX-99.B1g    Articles  Supplementary  of  Twentieth  Century  Investors,   dated
             November 17, 1995. (filed as a part of Post-Effective Amendment No.
             73 to the  Registration  Statement on Form N-1A of the  Registrant,
             Commission  File No.  2-14213,  filed on  February  29,  1996,  and
             incorporated herein by reference.)

EX-99.B1h    Articles Supplementary of Twentieth Century Investors,  Inc., dated
             January 30, 1996. (filed as a part of Post-Effective  Amendment No.
             73 to the  Registration  Statement on Form N-1A of the  Registrant,
             Commission  File No.  2-14213,  filed on  February  29,  1996,  and
             incorporated herein by reference.)

EX-99.B1i    Articles Supplementary of Twentieth Century Investors,  Inc., dated
             March 11, 1996. (filed as a part of Post-Effective Amendment No. 75
             to the  Registration  Statement  on Form  N-1A  of the  Registrant,
             Commission  File  No.   2-14213,   filed  on  June  14,  1996,  and
             incorporated herein by reference.)

EX-99.B1j    Articles of Amendment of Twentieth  Century  Investors,  Inc. dated
             December 2, 1996. (filed as a part of Post-Effective  Amendment No.
             76 to the  Registration  Statement on Form N-1A of the  Registrant,
             Commission  File No.  2-14213,  filed on  February  28,  1997,  and
             incorporated herein by reference.)

EX-99.B1k    Articles Supplementary of American Century Mutual Funds, Inc. dated
             December 2, 1996. (filed as a part of Post-Effective  Amendment No.
             76 to the  Registration  Statement on Form N-1A of the  Registrant,
             Commission  File No.  2-14213,  filed on  February  28,  1997,  and
             incorporated herein by reference.)

EX-99.B1l    Articles Supplementary of American Century Mutual Funds, Inc. dated
             July __, 1997 (to be filed with post-effective amendment).

EX-99.B2     Bylaws of Twentieth  Century  Investors,  Inc.  (filed as a part of
             Post-Effective  Amendment No. 73 to the  Registration  Statement on
             Form N-1A of the Registrant,  Commission File No. 2-14213, filed on
             February 29, 1996, and incorporated herein by reference.)

EX-99.B4     Specimen  certificate   representing  shares  of  common  stock  of
             American   Century  Mutual  Funds,   Inc.   (filed  as  a  part  of
             Post-Effective  Amendment No. 76 to the  Registration  Statement on
             Form N-1A of the Registrant,  Commission File No. 2-14213, filed on
             February 28, 1997, and incorporated herein by reference.)

EX-99.B5a    Management Agreement, dated as of August 1, 1994, between Twentieth
             Century Investors,  Inc. and Investors Research  Corporation.(filed
             as a part of  Post-Effective  Amendment No. 75 to the  Registration
             Statement  on Form  N-1A of the  Registrant,  Commission  File  No.
             2-14213,  filed  on June  14,  1996,  and  incorporated  herein  by
             reference.)

EX-99.B5b    Addendum  to  Management  Agreement,  dated as of August  1,  1996,
             between Twentieth Century  Investors,  Inc. and Investors  Research
             Corporation.(filed as a part of Post-Effective  Amendment No. 75 to
             the  Registration   Statement  on  Form  N-1A  of  the  Registrant,
             Commission  File  No.   2-14213,   filed  on  June  14,  1996,  and
             incorporated herein by reference.)

EX-99.B5c    Management  Agreement-Advisor Class, dated as of September 1, 1996,
             between Twentieth Century  Investors,  Inc. and Investors  Research
             Corporation.(filed as a part of Post-Effective  Amendment No. 75 to
             the  Registration   Statement  on  Form  N-1A  of  the  Registrant,
             Commission  File  No.   2-14213,   filed  on  June  14,  1996,  and
             incorporated herein by reference.)

EX-99.B5d    Management  Agreement-Service Class, dated as of September 1, 1996,
             between Twentieth Century  Investors,  Inc. and Investors  Research
             Corporation.(filed as a part of Post-Effective  Amendment No. 75 to
             the  Registration   Statement  on  Form  N-1A  of  the  Registrant,
             Commission  File  No.   2-14213,   filed  on  June  14,  1996,  and
             incorporated herein by reference.)

EX-99.B5e    Management  Agreement-Institutional Class, dated as of September 1,
             1996,  between  Twentieth  Century  Investors,  Inc. and  Investors
             Research  Corporation.(filed as a part of Post-Effective  Amendment
             No.  75  to  the  Registration   Statement  on  Form  N-1A  of  the
             Registrant,  Commission File No.  2-14213,  filed on June 14, 1996,
             and incorporated herein by reference.)

EX-99.B5f    Management  Agreement  between American Century Mutual Funds,  Inc.
             and American Century  Investment  Management,  Inc. dated August 1,
             1997 (to be filed with post-effective amendment.)

EX-99.B6a    Distribution  Agreement  between TCI  Portfolios,  Inc.,  Twentieth
             Century Capital  Portfolios,  Inc.,  Twentieth  Century  Investors,
             Inc.,  Twentieth Century Premium Reserves,  Inc., Twentieth Century
             Strategic  Asset   Allocations,   Inc.,   Twentieth  Century  World
             Investors,  Inc.  and  Twentieth  Century  Securities,  Inc.  dated
             September 3, 1996 (filed as Exhibit 6.1 to Post-Effective Amendment
             No.  21 to the  Registration  Statement  on Form  N-1A of  American
             Century Variable  Portfolios,  Inc.,  Commission File No. 811-5188,
             filed on July 1, 1997.)

EX-99.B6b    Amendment No. 1 to Distribution  Agreement between American Century
             Variable  Portfolios,  Inc.,  American Century Capital  Portfolios,
             Inc., American Century Mutual Funds, Inc., American Century Premium
             Reserves, Inc., American Century Strategic Asset Allocations, Inc.,
             American  Century  World Mutual  Funds,  Inc. and American  Century
             Investment Services, Inc. dated June 13, 1997 (filed as Exhibit 6.2
             to Post-Effective Amendment No. 21 to the Registration Statement on
             Form N-1A of American Century Variable Portfolios, Inc., Commission
             File No. 811-5188, filed on July 1, 1997.)

EX-99.B8a    Custodian Agreement for ACH transactions,  dated September 21, 1994
             between Twentieth Century Investors,  Inc. and United Missouri Bank
             of Kansas City, N.A. is included herein.

EX-99.B8b    Custody Agreement dated September 12, 1995, between United Missouri
             Bank  of  Kansas  City,  N.A.,   Investors  Research   Corporation,
             Twentieth  Century   Investors,   Inc.,   Twentieth  Century  World
             Investors,  Inc.,  Twentieth  Century  Premium  Reserves,  Inc. and
             Twentieth Century Capital  Portfolios,  Inc. (filed as Exhibit 8(e)
             to Pre-Effective  Amendment No. 4 to the Registration  Statement on
             Form N-1A of Twentieth Century Strategic Asset  Allocations,  Inc.,
             Commission File No. 33-79482, filed February 5, 1996).

EX-99.B8c    Amendment  No. 1 to  Custody  Agreement  dated  January  25,  1996,
             between  United  Missouri  Bank of  Kansas  City,  N.A.,  Investors
             Research Corporation,  Twentieth Century Investors, Inc., Twentieth
             Century World Investors,  Inc., Twentieth Century Premium Reserves,
             Inc.,  Twentieth  Century  Capital  Portfolios,  Inc. and Twentieth
             Century Strategic Asset Allocations, Inc. (filed as Exhibit 8(e) to
             Pre-Effective Amendment No. 4 to the Registration Statement on Form
             N-1A  of  Twentieth  Century  Strategic  Asset  Allocations,  Inc.,
             Commission File No. 33-79482, filed February 5, 1996).

EX-99.B8d    Amendment No. 2 to Custody  Agreement  dated June 4, 1997,  between
             UMB Bank,  N.A.,  American  Century  Investment  Management,  Inc.,
             American Century Mutual Funds, Inc.,  American Century World Mutual
             Funds, Inc., American Century Variable  Portfolios,  Inc., American
             Century Capital  Portfolios,  Inc. and American  Century  Strategic
             Asset Allocations, Inc. is included herein.

EX-99.B8e    Global Custody  Agreement  between The Chase Manhattan Bank and the
             Twentieth  Century and Benham  funds,  dated  August 9, 1996 (filed
             Exhibit-99.B8 as a part of  Post-Effective  Amendment No. 31 to the
             Registration  Statement on Form N-1A of American Century Government
             Income Trust,  Commission File No. 2-99222, filed February 7, 1997,
             and incorporated herein by reference.)

EX-99.B8f    Master Agreement  between Commerce Bank, N.A. and Twentieth Century
             Services,  Inc.  dated  January  22,  1997  (filed  as  a  part  of
             Post-Effective  Amendment No. 76 to the  Registration  Statement on
             Form N-1A of the Registrant,  Commission File No. 2-1421113,  filed
             on February 28, 1997, and incorporated herein by reference).

EX-99.B9     Transfer Agency Agreement dated as of March 1, 1991, by and between
             Twentieth Century  Investors,  Inc. and Twentieth Century Services,
             Inc.  (filed as a part of  Post-Effective  Amendment  No. 76 to the
             Registration  Statement on Form N-1A of the Registrant,  Commission
             File No.  2-1421113,  filed on February 28, 1997, and  incorporated
             herein by reference).

EX-99.B10    Opinion and Consent of Charles A. Etherington, Esq.

EX-99.B14    Model Retirement Plans (filed as Exhibits 14(a),  14(b),  14(c) and
             14(d)  to  Pre-Effective   Amendment  No.  2  to  the  Registration
             Statement on Form N-1A of Twentieth Century World Investors,  Inc.,
             Commission File No.  33-39242,  filed May 6, 1991, and incorporated
             herein by reference).

EX-99.B15a   Master  Distribution  and  Shareholder  Services  Plan of Twentieth
             Century Capital  Portfolios,  Inc.,  Twentieth  Century  Investors,
             Inc.,  Twentieth  Century  Strategic  Asset  Allocations,  Inc. and
             Twentieth  Century  World  Investors,  Inc.  (Advisor  Class) dated
             September 3, 1996 (filed as a part of Post-Effective  Amendment No.
             75 to the  Registration  Statement on Form N-1A of the  Registrant,
             Commission  File  No.   2-14213,   filed  on  June  14,  1996,  and
             incorporated herein by reference.)

EX-99.B15b   Amendment No. 1 to Master  Distribution  and  Shareholder  Services
             Plan of American Century Capital Portfolios, Inc., American Century
             Mutual Funds,  Inc.,  American Century Strategic Asset Allocations,
             Inc. and American Century World Mutual Funds,  Inc. (Advisor Class)
             dated June 13, 1997 is included herein.

EX-99.B15c   Shareholder  Services Plan of Twentieth Century Capital Portfolios,
             Inc.,   Twentieth  Century  Investors,   Inc.,   Twentieth  Century
             Strategic  Asset  Allocations,  Inc. and  Twentieth  Century  World
             Investors, Inc. (Service Class) dated September 3, 1996 (filed as a
             part  of  Post-Effective  Amendment  No.  75  to  the  Registration
             Statement  on Form  N-1A of the  Registrant,  Commission  File  No.
             2-14213,  filed  on June  14,  1996,  and  incorporated  herein  by
             reference.)

EX-99.B17    Power of  Attorney  dated  February  15,  1997  (filed as a part of
             Post-Effective  Amendment No. 76 to the  Registration  Statement on
             Form N-1A of the Registrant,  Commission File No. 2-14213, filed on
             February 28, 1997, and incorporated herein by reference.)

EX-99.B18a   Multiple Class Plan of Twentieth Century Capital Portfolios,  Inc.,
             Twentieth  Century  Investors,  Inc.,  Twentieth  Century Strategic
             Asset Allocations, Inc. and Twentieth Century World Investors, Inc.
             dated  September  3,  1996  (filed  as  a  part  of  Post-Effective
             Amendment No. 75 to the Registration  Statement on Form N-1A of the
             Registrant,  Commission File No.  2-14213,  filed on June 14, 1996,
             and incorporated herein by reference.)

EX-99.B18b   Amendment No. 1 to Multiple Class Plan of American  Century Capital
             Portfolios,  Inc.,  American Century Mutual Funds,  Inc.,  American
             Century  Strategic  Asset  Allocations,  Inc. and American  Century
             World Mutual Funds, Inc. dated June 13, 1997 is included herein.

EX-27.5.17   Financial Data Schedule for Benham High Yield Fund.

                      AMENDMENT NO. 2 TO CUSTODY AGREEMENT

         THIS AMENDMENT NO. 2 TO CUSTODY  AGREEMENT is made as of the 4th day of
June,  1997,  by and  among UMB  Bank,  N.A.,  a  national  banking  association
("Custodian"),  AMERICAN CENTURY INVESTMENT MANAGEMENT,  INC. ("ACIM") (formerly
known as Investors Research Corporation),  and each of the registered investment
companies that have executed this Amendment below (each,  individually  referred
to as a "Fund Company" and  collectively  referred to as the "Fund  Companies").
Capitalized  terms not otherwise  defined herein shall have the meaning ascribed
to them in the Custody Agreement (defined below).

                                    RECITALS

         WHEREAS,  Custodian,  ACIM  and the Fund  Companies  are  parties  to a
certain Custody Agreement dated September 12, 1995, as amended January 25, 1996,
(the "Custody Agreement"); and

         WHEREAS,  in January 1997,  ACIM and the Fund  Companies  changed their
names; and

         WHEREAS,  the parties desire to amend the Custody  Agreement to reflect
the new names of ACIM and each of the Fund Companies;

         NOW,  THEREFORE,  in  consideration  of the mutual  promises  set forth
herein, the parties hereto agree as follows:

         1. Appendix B to Amendment No. 1 to Custody Agreement is hereby amended
by deleting the text thereof in its entirety and  inserting in lieu therefor the
Appendix B attached hereto.

         2. After the date hereof, all references to the Custody Agreement shall
be deemed to mean the Custody  Agreement,  as further  amended by this Amendment
No. 2.

         3. In the event of a conflict between the terms of this Amendment No. 2
and the Custody Agreement,  it is the intention of the parties that the terms of
this  Amendment  No.  2  shall  control  and  the  Custody  Agreement  shall  be
interpreted on that basis. To the extent the provisions of the Custody Agreement
have not been amended by this  Amendment No. 2, the parties  hereby  confirm and
ratify the Custody Agreement.

         4. This  Amendment  No. 2 may be executed in two or more  counterparts,
each of which shall be an original and all of which  together  shall  constitute
one instrument.

         IN WITNESS WHEREOF,  the undersigned have executed this Amendment No. 2
as of the date first above written.

UMB BANK, N.A.                                   AMERICAN CENTURY INVESTMENT
                                                    MANAGEMENT, INC.

By:  /s/ Ralph R. Santoro                        By: /s/ William M. Lyons
     Name: Ralph R. Santoro                          William M. Lyons
     Title: Vice President                           Executive Vice President


AMERICAN CENTURY MUTUAL FUNDS, INC.
AMERICAN CENTURY WORLD MUTUAL FUNDS, INC.
AMERICAN CENTURY CAPITAL PORTFOLIOS, INC.
AMERICAN CENTURY STRATEGIC ASSET
    ALLOCATIONS, INC.
AMERICAN CENTURY VARIABLE PORTFOLIOS, INC.


BY: /s/ William M. Lyons
        William M. Lyons
        Executive Vice President of each


                                   APPENDIX B

                                Custody Agreement

         The  following   open-end   management   investment   companies  ("Fund
Companies") are hereby made parties to the Custody Agreement dated September 12,
1995,  with  UMB  Bank,n.a.   ("Custodian")  and  AMERICAN  CENTURY   INVESTMENT
MANAGEMENT,  INC.,  and  agree  to be  bound  by all the  terms  and  conditions
contained in said Agreement:

                                 FUND COMPANIES

                       American Century Mutual Funds, Inc.
                    American Century Capital Portfolios, Inc.
                    American Century World Mutual Funds, Inc.
               American Century Strategic Asset Allocations, Inc.
                   American Century Variable Portfolios, Inc.




ATTEST:                       American Century Mutual Funds, Inc.
                              American Century Capital Portfolios, Inc.
/s/ Charles A. Etherington    American Century World Mutual Funds, Inc.
                              American Century Strategic Asset Allocations, Inc.
                              American Century Variable Portfolios, Inc.


                              By:    /s/ William M. Lyons
                              Name:  William M. Lyons
                              Title: Executive Vice President of each
                              Date:  June 4, 1997

                             Charles A. Etherington
                                 Attorney at Law
                        4500 Main Street P.O. Box 418210
                        Kansas City, Missouri 64141-9210
                            Telephone (816) 340-4051
                            Telecopier (816) 340-4964
                           --------------------------

                                                                   July 17, 1997


American Century Mutual Funds, Inc.
American Century Tower
4500 Main Street
Kansas City, Missouri  64111

Ladies and Gentlemen:

     As counsel to American Century Mutual Funds,  Inc., I am generally familiar
with its affairs. Based upon this familiarity,  and upon the examination of such
documents  as I have deemed  relevant,  it is my opinion  that the shares of the
Corporation  described in  Post-Effective  Amendment No. 77 to its  Registration
Statement on Form N-1A, to be filed with the Securities and Exchange  Commission
on July  17,  1997,  will,  when  issued,  be  validly  issued,  fully  paid and
nonassessable.

     For the record, it should be noted that I am an officer of American Century
Services Corporation,  an affiliated  corporation of American Century Investment
Management, Inc., the investment adviser of American Century Mutual Funds, Inc.

     I hereby consent to the use of this opinion as an exhibit to Post-Effective
Amendment No. 77.

                                Very truly yours,

                                /s/Charles A. Etherington
                                Charles A. Etherington

                     AMENDMENT NO. 1 TO MASTER DISTRIBUTION
                          AND SHAREHOLDER SERVICES PLAN
                                       OF
                    AMERICAN CENTURY CAPITAL PORTFOLIOS, INC.
                       AMERICAN CENTURY MUTUAL FUNDS, INC.
               AMERICAN CENTURY STRATEGIC ASSET ALLOCATIONS, INC.
                    AMERICAN CENTURY WORLD MUTUAL FUNDS, INC.

                                  Advisor Class

         THIS AMENDMENT NO. 1 TO MASTER  DISTRIBUTION  AND SHAREHOLDER  SERVICES
PLAN is made as of the  13th  day of  June,  1997,  by each of the  above  named
corporations  (the "Issuers").  Capitalized  terms not otherwise  defined herein
shall  have  the  meaning  ascribed  to  them  in the  Master  Distribution  and
Shareholder Services Plan.

                                    RECITALS

         WHEREAS,  the Issuers are parties to a certain Master  Distribution and
Shareholder Services Plan dated September 3, 1996 (the "Plan"); and

         WHEREAS,  in January  1997,  the  Issuers and the Funds  changed  their
names; and

         WHEREAS, American Century Capital Portfolios, Inc., has added a series,
the American  Century Real Estate Fund (the "Fund"),  for which the Fund's board
has established an Advisor Class of shares; and

         WHEREAS,  the parties desire to amend the Plan to reflect the new names
of the Issuers and the Funds, and to adopt the Plan on behalf of the Fund.

         NOW,  THEREFORE,  in  consideration  of the mutual  promises  set forth
herein, the parties hereto agree as follows:

         1. American Century Capital Portfolios,  Inc. hereby adopts the Plan on
behalf of the Fund, in accordance  with Rule 12b-1 under the 1940 Act and on the
terms and conditions contained in the Plan.

         2.  Schedule  A to the Plan is  hereby  amended  by  deleting  the text
thereof in its entirety and  inserting in lieu  therefor the Schedule A attached
hereto.

         3. After the date hereof, all references to the Plan shall be deemed to
mean the Master  Distribution and Shareholder  Services Plan, as amended by this
Amendment No. 1.

         4. In the event of a conflict  between the terms of this Amendment No.1
and the  Plan,  it is the  intention  of the  parties  that  the  terms  of this
Amendment No. 1 shall control and the Plan shall be  interpreted  on that basis.
To the extent the provisions of the Plan have not been amended by this Amendment
No. 1, the parties hereby confirm and ratify the Plan.

         5. This  Amendment  No. 1 may be executed in two or more  counterparts,
each of which shall be an original and all of which  together  shall  constitute
one instrument.

         IN WITNESS WHEREOF,  the undersigned have executed this Amendment No. 1
as of the date first above written.

                                 AMERICAN CENTURY CAPITAL PORTFOLIOS, INC.
                                 AMERICAN CENTURY MUTUAL FUNDS, INC.
                                 AMERICAN CENTURY STRATEGIC ASSET
                                     ALLOCATIONS, INC.
                                 AMERICAN CENTURY WORLD MUTUAL FUNDS, INC.


                                 BY: /s/ William M. Lyons
                                     William M. Lyons
                                 Executive Vice President of each of the Issuers



                                   SCHEDULE A

                      Series Offering Advisor Class Shares

  Fund                                              Date Plan Adopted
- --------------------------------------------------------------------------------

AMERICAN CENTURY CAPITAL PORTFOLIOS, INC.
      American Century Equity Income Fund                     September 3, 1996
      American Century Value Fund                             September 3, 1996
      American Century Real Estate Fund                       June 13, 1997

AMERICAN CENTURY MUTUAL FUNDS, INC.
      American Century Balanced Fund                          September 3, 1996
      Benham Cash Reserve Fund                                September 3, 1996
      Twentieth Century Growth Fund                           September 3, 1996
      Twentieth Century Heritage Fund                         September 3, 1996
      Benham Intermediate-Term Bond Fund                      September 3, 1996
      Benham Limited-Term Bond Fund                           September 3, 1996
      Benham Bond Fund                                        September 3, 1996
      Twentieth Century Select Fund                           September 3, 1996
      Benham Intermediate-Term Government Fund                September 3, 1996
      Benham Short-Term Government Fund                       September 3, 1996
      Twentieth Century Ultra Fund                            September 3, 1996
      Twentieth Century Vista Fund                            September 3, 1996
                                                              
AMERICAN CENTURY STRATEGIC ASSET ALLOCATIONS, INC.
      American Century Strategic Allocation: Aggressive       September 3, 1996
      American Century Strategic Allocation: Conservative     September 3, 1996
      American Century Strategic Allocation: Moderate         September 3, 1996

AMERICAN CENTURY WORLD MUTUAL FUNDS, INC.
       Twentieth Century International Growth Fund            September 3, 1996
       Twentieth Century International Discovery Fund         September 3, 1996



                     AMENDMENT NO. 1 TO MULTIPLE CLASS PLAN
                                       OF
                    AMERICAN CENTURY CAPITAL PORTFOLIOS, INC.
                       AMERICAN CENTURY MUTUAL FUNDS, INC.
               AMERICAN CENTURY STRATEGIC ASSET ALLOCATIONS, INC.
                    AMERICAN CENTURY WORLD MUTUAL FUNDS, INC.


         THIS  AMENDMENT NO. 1 TO MULTIPLE CLASS PLAN is made as of the 13th day
of  June,  1997,  by each  of the  above  named  corporations  (the  "Issuers").
Capitalized  terms not otherwise  defined herein shall have the meaning ascribed
to them in the Multiple Class Plan.

                                    RECITALS

         WHEREAS, the Issuers are parties to a certain Multiple Class Plan dated
as of May 31, 1996, and effective September 3, 1996 (the "Plan"); and

         WHEREAS,  in January  1997,  the  Issuers and the Funds  changed  their
names; and

         WHEREAS, American Century Capital Portfolios, Inc., has added a series,
American Century Real Estate Fund (the "Fund"), offering multiple classes; and

         WHEREAS,  the Plan designates four classes of shares: the Retail Class,
the Institutional Class, the Service Class, and the Advisor Class; and

         WHEREAS,  the parties desire to amend the Plan to reflect the new names
of the Issuers  and the Funds,  to adopt the Plan for the Fund and to change the
name of the Retail Class to Investor Class.

         NOW,  THEREFORE,  in  consideration  of the mutual  promises  set forth
herein, the parties hereto agree as follows:

         1. American Century Capital Portfolios,  Inc. hereby adopts the Plan on
behalf of the Fund, in accordance  with Rule 18f-3 under the 1940 Act and on the
terms and conditions contained in the Plan.

         2.  Schedule  A to the Plan is  hereby  amended  by  deleting  the text
thereof in its entirety and  inserting in lieu  therefor the Schedule A attached
hereto.

         3. After the date hereof,  all  reference to the "Retail  Class" in the
Plan shall be deemed to mean the "Investor Class."

         4. After the date hereof, all references to the Plan shall be deemed to
mean the Multiple Class Plan, as amended by this Amendment No. 1.

         5. In the event of a conflict  between the terms of this Amendment No.1
and the  Plan,  it is the  intention  of the  parties  that  the  terms  of this
Amendment No. 1 shall control and the Plan shall be  interpreted  on that basis.
To the extent the provisions of the Plan have not been amended by this Amendment
No. 1, the parties hereby confirm and ratify the Plan.

         6. This  Amendment  No. 1 may be executed in two or more  counterparts,
each of which shall be an original and all of which  together  shall  constitute
one instrument.

         IN WITNESS WHEREOF,  the undersigned have executed this Amendment No. 1
as of the date first above written.

                         AMERICAN CENTURY CAPITAL PORTFOLIOS, INC.
                         AMERICAN CENTURY MUTUAL FUNDS, INC.
                         AMERICAN CENTURY STRATEGIC ASSET
                             ALLOCATIONS, INC.
                         AMERICAN CENTURY WORLD MUTUAL FUNDS, INC.


                         BY: /s/ William M. Lyons
                             William M. Lyons
                             Executive Vice President of each of the Issuers



<TABLE>
<CAPTION>
                                                        SCHEDULE A

                                    Companies and Funds Covered by this Multiclass Plan

                                                                  Investor          Institutional        Services       Advisor
Fund                                                               Class                Class              Class         Class
- ------------------------------------------------------------------------------------------------------------------------------------
AMERICAN CENTURY CAPITAL PORTFOLIOS, INC.
<S>                                                                <C>               <C>                <C>             <C>
      American Century Equity Income Fund                           Yes                  Yes                Yes           Yes
      American Century Value Fund                                   Yes                  Yes                Yes           Yes
      American Century Real Estate Fund                             Yes                  Yes                No            Yes

AMERICAN CENTURY MUTUAL FUNDS, INC.
      American Century Balanced Fund                                Yes                  Yes                Yes           Yes
      Benham Cash Reserve Fund                                      Yes                  No                 Yes           Yes
      Twentieth Century Growth Fund                                 Yes                  Yes                Yes           Yes
      Twentieth Century Heritage Fund                               Yes                  Yes                Yes           Yes
      Benham Intermediate-Term Bond Fund                            Yes                  No                 Yes           Yes
      Benham Limited-Term Bond Fund                                 Yes                  No                 Yes           Yes
      Benham Bond Fund                                              Yes                  No                 Yes           Yes
      Twentieth Century Select Fund                                 Yes                  Yes                Yes           Yes
      Benham Intermediate-Term Government Fund                      Yes                  No                 Yes           Yes
      Benham Short-Term Government Fund                             Yes                  No                 Yes           Yes
      Twentieth Century Ultra Fund                                  Yes                  Yes                Yes           Yes
      Twentieth Century Vista Fund                                  Yes                  Yes                Yes           Yes
      Twentieth Century Giftrust                                    Yes                  No                 No            No 
      Benham Limited-Term Tax-Exempt Fund                           Yes                  No                 No            No 
      Benham Intermediate-Term Tax-Exempt Fund                      Yes                  No                 No            No 
      Benham Long-Term Tax-Exempt Fund                              Yes                  No                 No            No 
                                                                    
AMERICAN  CENTURY STRATEGIC ASSET ALLOCATIONS, INC.
      American Century Strategic Allocation: Aggressive             Yes                  No                 Yes           Yes
      American Century Strategic Allocation: Conservative           Yes                  No                 Yes           Yes
      American Century Strategic Allocation: Moderate               Yes                  No                 Yes           Yes
                                                                    
AMERICAN CENTURY WORLD MUTUAL FUNDS, INC.
      Twentieth Century International Growth Fund                   Yes                  Yes                Yes           Yes
      Twentieth Century International Discovery Fund                Yes                  Yes                Yes           Yes
</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<SERIES>
   <NUMBER> 18
   <NAME> BENHAM HIGH YIELD FUND - 1997 PORTFOLIO
<MULTIPLIER>                                        1000
       
<S>                         <C>
<PERIOD-TYPE>                                       YEAR
<FISCAL-YEAR-END>                            OCT-31-1997
<PERIOD-END>                                 OCT-31-1997
<INVESTMENTS-AT-COST>                                  0
<INVESTMENTS-AT-VALUE>                                 0
<RECEIVABLES>                                          0
<ASSETS-OTHER>                                         0
<OTHER-ITEMS-ASSETS>                                   0
<TOTAL-ASSETS>                                         0
<PAYABLE-FOR-SECURITIES>                               0
<SENIOR-LONG-TERM-DEBT>                                0
<OTHER-ITEMS-LIABILITIES>                              0
<TOTAL-LIABILITIES>                                    0
<SENIOR-EQUITY>                                        0
<PAID-IN-CAPITAL-COMMON>                               0
<SHARES-COMMON-STOCK>                                  0
<SHARES-COMMON-PRIOR>                                  0
<ACCUMULATED-NII-CURRENT>                              0
<OVERDISTRIBUTION-NII>                                 0
<ACCUMULATED-NET-GAINS>                                0
<OVERDISTRIBUTION-GAINS>                               0
<ACCUM-APPREC-OR-DEPREC>                               0
<NET-ASSETS>                                           0
<DIVIDEND-INCOME>                                      0
<INTEREST-INCOME>                                      0
<OTHER-INCOME>                                         0
<EXPENSES-NET>                                         0
<NET-INVESTMENT-INCOME>                                0
<REALIZED-GAINS-CURRENT>                               0
<APPREC-INCREASE-CURRENT>                              0
<NET-CHANGE-FROM-OPS>                                  0
<EQUALIZATION>                                         0
<DISTRIBUTIONS-OF-INCOME>                              0
<DISTRIBUTIONS-OF-GAINS>                               0
<DISTRIBUTIONS-OTHER>                                  0
<NUMBER-OF-SHARES-SOLD>                                0
<NUMBER-OF-SHARES-REDEEMED>                            0
<SHARES-REINVESTED>                                    0
<NET-CHANGE-IN-ASSETS>                                 0
<ACCUMULATED-NII-PRIOR>                                0
<ACCUMULATED-GAINS-PRIOR>                              0
<OVERDISTRIB-NII-PRIOR>                                0
<OVERDIST-NET-GAINS-PRIOR>                             0
<GROSS-ADVISORY-FEES>                                  0
<INTEREST-EXPENSE>                                     0
<GROSS-EXPENSE>                                        0
<AVERAGE-NET-ASSETS>                                   0
<PER-SHARE-NAV-BEGIN>                               0.00
<PER-SHARE-NII>                                        0
<PER-SHARE-GAIN-APPREC>                             0.00
<PER-SHARE-DIVIDEND>                                0.00
<PER-SHARE-DISTRIBUTIONS>                           0.00
<RETURNS-OF-CAPITAL>                                0.00
<PER-SHARE-NAV-END>                                    0
<EXPENSE-RATIO>                                     0.00
<AVG-DEBT-OUTSTANDING>                                 0
<AVG-DEBT-PER-SHARE>                                   0
        

</TABLE>


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