AMERICAN CENTURY MUNICIPAL TRUST
497, 1997-06-06
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                                   PROSPECTUS

                            [american century logo]
                                    American
                                  Century(sm)

                                  MAY 31, 1997

                                     BENHAM
                                    GROUP(R)

                             Limited-Term Tax-Free

[front cover]


                          AMERICAN CENTURY INVESTMENTS
                                FAMILY OF FUNDS

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

                          AMERICAN CENTURY INVESTMENTS

     Benham Group          American Century Group     Twentieth Century(R) Group

  MONEY MARKET FUNDS         ASSET ALLOCATION &             GROWTH FUNDS
 GOVERNMENT BOND FUNDS         BALANCED FUNDS            INTERNATIONAL FUNDS
DIVERSIFIED BOND FUNDS    CONSERVATIVE EQUITY FUNDS
 MUNICIPAL BOND FUNDS          SPECIALTY FUNDS

 Limited-Term Tax-Free



                                   PROSPECTUS
                                  MAY 31, 1997

                             Limited-Term Tax-Free

                        AMERICAN CENTURY MUNICIPAL TRUST

     American Century Municipal Trust is a part of American Century Investments,
a family of funds  that  includes  nearly 70  no-load  mutual  funds  covering a
variety of investment opportunities. One of the funds from our Benham Group that
invests  in  various  types of  municipal  securities,  American  Century-Benham
Limited-Term  Tax-Free Fund (the "Fund"),  is described in this Prospectus.  Its
investment objective is listed on page 2 of this Prospectus. The other funds are
described in separate prospectuses.

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

     This Prospectus  gives you information  about the Fund that you should know
before investing. Please read this Prospectus carefully and retain it for future
reference.  Additional  information  is included in the  Statement of Additional
Information  dated May 31,  1997,  and filed with the  Securities  and  Exchange
Commission  ("SEC").  It is incorporated  into this Prospectus by reference.  To
obtain a copy without charge, call or write:

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

Prospectus                                                                     1


                        INVESTMENT OBJECTIVE OF THE FUND

AMERICAN CENTURY--BENHAM
LIMITED-TERM TAX-FREE FUND

     Limited-Term  Tax-Free Fund seeks as high a level of interest income exempt
from regular  federal  income  taxes as is  consistent  with prudent  investment
management, while seeking to conserve shareholders' capital. The Fund intends to
pursue its investment objective by investing in tax-free bonds and maintaining a
weighted average maturity of five years or less.

     AN  INVESTMENT  IN THE FUND IS NEITHER  INSURED NOR  GUARANTEED BY THE U.S.
GOVERNMENT.

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

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

2    Investment Objective                           American Century Investments


                               TABLE OF CONTENTS

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

INFORMATION REGARDING THE FUND

Investment Policies of the Fund.............................................6
Portfolio Investment Quality and Maturity Guidelines........................6
Risk Factors and Investment Techniques......................................6
Basic Fixed Income Investment Risks.........................................6
       Interest Rate Risk...................................................6
       Credit Risk..........................................................6
       Liquidity Risk.......................................................7
       Concentration Risk...................................................7
       Call Risk............................................................7
   Municipal Securities.....................................................7
   Tax-Exempt Securities....................................................8
Other Investment Practices, Their Characteristics
   and Risks................................................................8
   Portfolio Turnover.......................................................8
   When-Issued and Forward Commitment
       Agreement............................................................9
   Interest Rate Futures Contracts and
       Options Thereon......................................................9
   Rule 144A Securities....................................................10
   Cash Management.........................................................10
   Other Techniques........................................................10
Performance Advertising....................................................10

HOW TO INVEST WITH AMERICAN CENTURY INVESTMENTS

American Century Investments...............................................12
Investing in American Century..............................................12
How to Open an Account.....................................................12
       By Mail.............................................................12
       By Wire.............................................................12
       By Exchange.........................................................13
       In Person...........................................................13
   Subsequent Investments..................................................13
       By Mail.............................................................13
       By Telephone........................................................13
       By Online Access....................................................13
       By Wire.............................................................13
       In Person...........................................................13
   Automatic Investment Plan...............................................13
How to Exchange from One Account to Another ...............................13
       By Mail ............................................................14
       By Telephone........................................................14
       By Online Access....................................................14
How to Redeem Shares.......................................................14
       By Mail.............................................................14
       By Telephone........................................................14
       By Check-A-Month....................................................14
       Other Automatic Redemptions.........................................14
   Redemption Proceeds.....................................................14
       By Check............................................................14
       By Wire and ACH.....................................................14
   Redemption of Shares
       in Low-Balance Accounts.............................................14
Signature Guarantee........................................................15
Special Shareholder Services...............................................15
       Automated Information Line..........................................15
       Online Account Access...............................................15
       Checkwriting........................................................15
       Open Order Service..................................................16
       Tax-Qualified Retirement Plans......................................16
Important Policies Regarding Your Investments..............................16
Reports to Shareholders....................................................17
Employer-Sponsored Retirement Plans and
   Institutional Accounts..................................................17

ADDITIONAL INFORMATION YOU SHOULD KNOW

Share Price................................................................18
   When Share Price Is Determined..........................................18
   How Share Price Is Determined...........................................18
   Where to Find Information About Share Price.............................18
Distributions..............................................................18
Taxes  19
   Tax-Deferred Accounts...................................................19
   Taxable Accounts........................................................19
   Special Tax Information.................................................20
   Municipal Securities....................................................20
   Alternative Minimum Tax Liability.......................................20
Management.................................................................21
   Investment Management...................................................21
   Code of Ethics..........................................................22
   Transfer and Administrative Services....................................22
Distribution of Fund Shares................................................22
Further Information About American Century.................................22

Prospectus                                                Table of Contents    3


                    TRANSACTION AND OPERATING EXPENSE TABLE

                                                               Limited-Term
                                                                 Tax-Free

SHAREHOLDER TRANSACTION EXPENSES:

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

ANNUAL FUND OPERATING EXPENSES:(2)
(as a percentage of net assets)

Management Fees(3)............................................    0.51%
12b-1 Fees....................................................     none
Other Expenses(4).............................................    0.01%
Total Fund Operating Expenses.................................    0.52%

EXAMPLE:

You would pay the following expenses on a               1 year      $ 5
$1,000 investment, assuming a 5% annual return and     3 years       17
redemption at the end of each time period:             5 years       29
                                                      10 years       65

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

(2)   The management fees, other expenses and total operating expenses have been
      restated to reflect current expenses.

(3)   A portion  of the  management  fee may be paid by the  funds'  manager  to
      unaffiliated  third parties who provide  recordkeeping and  administrative
      services that would otherwise be performed by an affiliate of the manager.
      See "Management - Transfer and Administrative Services," page 22.

(4)   Other expenses,  the fees and expenses  (including  legal counsel fees) of
      those  directors  who are  not  "interested  persons"  as  defined  in the
      Investment Company Act of 1940, are estimated to be .0079 of 1% of average
      net assets for the most recent fiscal year.

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

4    Transaction and Operating Expense Table        American Century Investments

<TABLE>
<CAPTION>
                              FINANCIAL HIGHLIGHTS
                             LIMITED-TERM TAX-FREE

     The  Financial  Highlights  for each of the  periods  presented  have  been
audited by Baird,  Kurtz & Dobson,  independent  certified  public  accountants,
whose report thereon appears in the Fund's annual report,  which is incorporated
by  reference to the  Statement of  Additional  Information.  The annual  report
contains  additional  performance  information  and will be made  available upon
request and without charge. The information presented is for a share outstanding
throughout the years ended October 31, except as noted.  The  information  below
reflects  the  effect  of the  proposed  reorganization  of the Fund and  Benham
Limited-Term Tax-Exempt Fund.

                                                             1996         1995         1994         1993(1)
                                                             ----         ----         ----         -------

PER-SHARE DATA

<S>                                                         <C>            <C>         <C>          <C>   
Net Asset Value, Beginning of Period................        $10.09         $9.95       $10.04       $10.00
                                                          --------      --------     --------     --------
Income From Investment Operations

     Net Investment Income...........................         0.43          0.44         0.36         0.21

     Net Realized and Unrealized Gain (Loss)
     on Investment Transactions......................       (0.01)          0.14       (0.09)         0.04
                                                          --------      --------     --------     --------
     Total From Investment Operations................         0.42          0.58         0.27         0.25
                                                          --------      --------     --------     --------
Distributions

     From Net Investment Income......................       (0.43)        (0.44)       (0.36)       (0.21)
                                                          --------      --------     --------     --------
Net Asset Value, End of Period.......................       $10.08        $10.09        $9.95       $10.04
                                                          ========      ========     ========     ========
TOTAL RETURN(2)......................................        4.26%         5.95%        2.75%        2.58%

RATIOS/SUPPLEMENTAL DATA

     Ratio of Operating Expenses to Average
     Net Assets......................................     0.38%(3)            --           --           --

     Ratio of Net Investment Income to Average
     Net Assets......................................        4.28%         4.38%        3.62%     3.09%(4)

     Portfolio Turnover Rate.........................          68%           78%          42%        3%(4)

     Net Assets, End of Period (in thousands)........      $49,866       $58,837      $60,857      $52,265

(1)   March 1, 1993 (inception) through October 31, 1993.

(2)   Total  return  assumes   reinvestment   of  dividends  and  capital  gains
      distributions,  if any.  Total  returns for periods less than one year are
      not annualized.

(3)   The Manager  voluntarily  waived its management  fee through  February 29,
      1996. In absence of the waiver, the ratio of operating expenses to average
      net assets would have been 0.60%.

(4)   Annualized.
</TABLE>

Prospectus                                             Financial Highlights    5


                         INFORMATION REGARDING THE FUND

INVESTMENT POLICIES OF THE FUND

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

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

     The Fund  seeks as high a level of  interest  income  exempt  from  regular
federal income taxes as is consistent with prudent investment management,  while
seeking  to  conserve  shareholders'  capital.  The Fund  intends  to pursue its
investment  objective by investing in tax-free bonds and  maintaining a weighted
average maturity of one to five years.

     The Fund is a "diversified  company" as defined in the  Investment  Company
Act of 1940. This means that, with respect to 75% of its total assets,  the Fund
will not invest more that 5% of its total assets in the  securities  of a single
issuer. This policy is fundamental.

     The Fund  intends  to  remain  fully  invested  in  municipal  obligations,
although for temporary defensive purposes, it may invest a portion if its assets
in U.S.  government  securities,  the  interest  income on which is  subject  to
federal  income  tax.  The Fund may  invest  up to 20% of its  total  assets  in
securities  issued by U.S.  territories  or  possessions,  such as Puerto  Rico,
provided  that the  interest  on these  securities  is exempt  from the  regular
federal income tax.

     The Fund may invest up to 20% of its total assets in municipal  obligations
for which the  interest  is a tax  preference  item for  purposes of the federal
alternative minimum tax.

PORTFOLIO INVESTMENT QUALITY AND
MATURITY GUIDELINES

     In terms of credit quality, the Fund restricts its investments to:

(1)   Municipal bonds rated, when acquired,  within the four highest  categories
      designated by a nationally  recognized  statistical rating agency ("rating
      agency");

(2)   Municipal  notes   (including   variable-rate   demand   obligations)  and
      tax-exempt  commercial paper rated, when acquired,  within the two highest
      categories designated by a rating agency; and

(3)   Unrated  obligations  judged by the  Manager,  under the  direction of the
      Board of Trustees, to be of comparable quality.

RISK FACTORS AND INVESTMENT TECHNIQUES

     The market  value of the  investments  of the Fund will change over time in
response  to a  number  of  factors,  which  are  summarized  in  the  following
paragraphs.

BASIC FIXED INCOME INVESTMENT RISKS

INTEREST RATE RISK

     The Fund is susceptible to changing interest rates. Changing interest rates
affect not only the level of income the Fund generates for shareholders, but its
share price as well.  In general,  when  interest  rates rise,  the Fund's share
prices declines; when interest rates decline, its share price rises.

     This  pattern  is due to the  time  value  of  money.  A  bond's  worth  is
determined by the present value of its future cash flows. Consequently, changing
interest  rates have a greater  effect on the present value of a long-term  bond
than a short-term bond.

CREDIT RISK

     In selecting  investments  for the Fund,  the Manager  carefully  considers
the creditworthiness of parties

6    Information Regarding the Fund                 American Century Investments


and their  reliability  for the timely  payment of  interest  and  repayment  of
principal.

     In many cases, these parties include not only the issuer of the obligation,
but a bank or other  financial  intermediary  who  offers a letter  of credit or
other form of guarantee on the obligation.

LIQUIDITY RISK

     A security's ratings reflect the opinions of the rating agencies that issue
them and are not absolute standards of quality. Because of the cost of obtaining
credit  ratings,  some issuers forego them.  Under the direction of the Board of
Trustees, the Manager may buy unrated bonds for the Fund if these securities are
judged  to be of a  quality  consistent  with the  Fund's  investment  policies.
Similarly,  the Manager may purchase securities whose ratings are not consistent
with the  Fund's  rating  criteria  but  which  the  Manager  judges,  under the
direction of the Board of Trustees,  to present credit risks consistent with the
Fund's quality standards. The Fund may invest up to 10% of its assets in unrated
securities. Unrated securities may be less liquid than rated securities.

     The Fund may invest in securities  rated Baa or BBB (the lowest  investment
grade  category).  The Fund will limit its investment in securities rated Baa or
BBB  to 25% of  the  Fund's  total  assets.  Such  securities  are  medium-grade
investment  obligations  that may have speculative  characteristics.  Changes in
economic conditions or other circumstances are more likely to lead to a weakened
capacity for such obligations to make principal and interest payments.

CONCENTRATION RISK

     The Fund may invest  25% or more of its total  assets in  obligations  that
generate  income from  similar  types of projects  (in  particular,  projects in
health care, electric, water/sewer, education, and transportation). Political or
economic developments  affecting a single issuer or industry or similar types of
projects may have a significant effect on Fund performance.

CALL RISK

     Many municipal obligations are issued with a call feature (features include
a date on which the issuer has reserved the right to redeem the obligation prior
to maturity).  An  obligation  may be called for  redemption  before the Manager
would otherwise choose to eliminate it from the Fund's holdings. A call may also
reduce an obligation's yield to maturity.

MUNICIPAL SECURITIES

     Municipal  securities  are  issued to raise  money for a variety  of public
purposes, including general financing for state and local governments as well as
financing for specific projects and public facilities.  Municipal securities may
be  backed by the full  taxing  power of a  municipality,  the  revenues  from a
specific  project,  or the  credit  of a  private  organization.  The  following
discussion provides a brief description of some securities the Fund may buy. The
Fund is not limited by this discussion, and it may buy other types of securities
and enter into other types of transactions  that meet its quality,  maturity and
liquidity requirements.

     MUNICIPAL NOTES typically have maturities of 13 months or less and are used
to provide short-term capital or to meet cash flow demands.

     GENERAL OBLIGATION BONDS are backed by the taxing power of the issuer.

     REVENUE BONDS are backed by the revenues  derived from a specific  project,
system,  or facility.  Industrial  development  bonds are a type of revenue bond
backed by the credit of a private issuer.

     VARIABLE-  AND   FLOATING-RATE   DEMAND   OBLIGATIONS  have  interest  rate
adjustment formulas designed to stabilize their market values. These obligations
normally  have  maturities  in  excess  of one year but  carry  demand  features
permitting  the  holders  to demand  repayment  of  principal  at any time or at
specified intervals.

     TENDER OPTION BONDS are created by combining an  intermediate- or long-term
fixed-rate  tax-exempt  bond with a tender  agreement  that gives the holder the
option to tender the bond at face value.  Tender  option bonds  purchased by the
Fund are  structured  with  rates  that are  reset  weekly  or at other  regular
intervals.

     A sponsor may  terminate a tender  option  agreement  if, for example,  the
issuer of the underlying bond defaults on interest  payments,  or the underlying
bond is downgraded or becomes taxable. Under such circumstances,  the Fund might
then own a bond that does not meet its quality or maturity criteria.

     The Manager  monitors  the credit  quality of bonds  underlying  the Fund's
tender option bond holdings

Prospectus                                   Information Regarding the Fund    7


and will sell or put back a tender  option bond if the rating on the  underlying
bond falls below the  second-highest  rating  designated by a rating agency.  In
addition,  the Fund limits its  investments in tender option bonds to 15% of net
assets.

     MUNICIPAL LEASE  OBLIGATIONS  are issued by state and local  governments to
acquire land and a wide variety of equipment and facilities.  These  obligations
typically are not fully backed by the issuing  municipality's  ability to assess
taxes to meet its debt  obligations.  If the state or local  government does not
make  appropriations  for the  following  year's lease  payments,  the lease may
terminate,  with the possibility of default on the lease  obligation and loss to
investors.

     ZERO-COUPON  MUNICIPAL  SECURITIES do not make regular  interest  payments.
Instead,  they are sold at a deep discount to their face value.  In  calculating
daily  dividends,  the Fund takes  into  account,  as  income,  a portion of the
difference  between these securities'  purchase prices and face values.  Because
zero-coupon  securities  do not pay  current  income,  their  prices can be very
volatile when interest rates change.

     The Fund may invest in  INVERSE  FLOATERS  to  generate  higher  tax-exempt
yields than are offered by other  instruments.  Inverse  floaters  bear interest
rates that move inversely to market interest rates. Generally, the interest rate
on the inverse  floater is computed as the  difference  between an  above-market
fixed  rate of  interest  and a  floating  rate  determined  by  reference  to a
market-based or bond-specific interest rate.

     Since inverse  floaters are long-term  bonds, the value of these securities
may be volatile  when market  interest  rates change.  In addition,  there is no
guarantee  that  the  Manager  will be able to find a ready  buyer  for  inverse
floaters.

     AMT BONDS  typically are tax-exempt  "private  activity" bonds issued after
August 7,  1986,  whose  proceeds  are  directed  at least in part to a private,
for-profit  organization.  Although the interest income from AMT bonds is exempt
from  regular  federal  income  tax,  that income is a tax  preference  item for
purposes of the AMT.

     In addition,  corporate investors should note that all income from the Fund
may be part of an  adjustment  to AMT under  Section 55 of the Internal  Revenue
Code and the  environmental tax under Internal Revenue Code Section 59A. The AMT
is a special  separate  tax that applies to certain  taxpayers  who have certain
adjustments to income or tax preference items.

TAX-EXEMPT SECURITIES

     Historically,  interest  paid  on  securities  issued  by  states,  cities,
counties, school districts and other political subdivisions of the United States
has been exempt from federal  income  taxes.  Legislation  since 1985,  however,
affects the tax  treatment  of certain  types of  municipal  bonds  issued after
certain  dates and, in some cases,  subjects  the income from  certain  bonds to
differing tax treatment depending on the tax status of its recipient.

     The Fund should be  expected to invest some  portion of its assets in bonds
which, in the hands of some holders, would be subject to the AMT, as long as the
Manager  determines  it is in the best  interest of  shareholders  generally  to
invest in such securities. See "Taxes," page 19.

     The Fund may quote tax-equivalent  yields, which show the taxable yields an
investor would have to earn before taxes to equal the Fund's  tax-free yield. As
a  prospective   investor  in  the  Fund,  you  should  determine  whether  your
tax-equivalent  yield is likely to be higher with a taxable or with a tax-exempt
fund. To determine this, you may use the formula depicted below.

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

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

OTHER INVESTMENT PRACTICES, THEIR CHARACTERISTICS
AND RISKS

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

PORTFOLIO TURNOVER

     The  portfolio  turnover  rates  of the Fund  are  shown  in the  Financial
Highlights table on page 5 of this Prospectus.

     Investment  decisions  to  purchase  and sell  securities  are based on the
anticipated contribution of the

8    Information Regarding the Fund                 American Century Investments


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.   A  high   turnover   rate   involves
correspondingly higher transaction costs that are borne directly by the Fund. It
may also affect the character of capital gains, if any, realized and distributed
by the Fund since short-term capital gains are taxable as ordinary income.

WHEN-ISSUED AND FORWARD COMMITMENT AGREEMENTS

     The Fund may  sometimes  purchase new issues of securities on a when-issued
or forward commitment basis when, in the opinion of the Manager,  such purchases
will  further the  investment  objective of the Fund.  The price of  when-issued
securities  is  established  at the time the  commitment  to  purchase  is made.
Delivery  of and  payment for these  securities  typically  occurs 15 to 45 days
after the commitment to purchase. Market rates of interest on debt securities at
the time of  delivery  may be higher or lower than those  contracted  for on the
security.  Accordingly, the value of the 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 appropriate  liquid 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.

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
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.

     The Fund may use futures and options transactions to maintain cash reserves
while remaining fully invested,  to facilitate  trading,  to reduce  transaction
costs, or to pursue higher investment  returns when a futures contract is priced
more attractively than its underlying security or index.

     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 of 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
activities  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.

Prospectus                                   Information Regarding the Fund    9


     See the Statement of Additional  Information for further  information about
these instruments and their risks.

RULE 144A SECURITIES

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

     With respect to securities  eligible for resale under Rule 144A,  the staff
of the SEC has taken the position that the  liquidity of such  securities in the
portfolio of a fund offering redeemable securities is a question of fact for the
Board  of  Trustees  to  determine,  such  determination  to  be  based  upon  a
consideration  of the readily  available  trading  markets and the review of any
contractual  restrictions.  The staff also  acknowledges  that,  while the Board
retains ultimate  responsibility,  it may delegate this function to the Manager.
Accordingly, the Board has established guidelines and 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  Manager  will  consider
appropriate  remedies to minimize the effect on the Fund's  liquidity.  The Fund
may not  invest  more  than  15% of its  total  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).

CASH MANAGEMENT

     For cash  management  purposes,  the Fund may  invest up to 5% of its total
assets in other investment companies, provided that the investment is consistent
with the Fund's investment policies and restrictions.

OTHER TECHNIQUES

     The Manager may buy other types of  securities  or employ  other  portfolio
management  techniques on behalf of the Fund. When SEC guidelines  require it to
do so, the Fund will set aside cash or appropriate liquid assets in a segregated
account  to cover  its  obligations.  See the  Fund's  Statement  of  Additional
Information for a more detailed  discussion of these investments and some of the
risks associated with them.

PERFORMANCE ADVERTISING

     From  time  to  time,  the  Fund  may  advertise   performance  data.  Fund
performance  may be shown by presenting  one or more  performance  measurements,
including  cumulative  total  return or  average  annual  total  return,  yield,
effective yield and tax-equivalent yield.

     Cumulative  total  return data is computed by  considering  all elements of
return,  including  reinvestment  of dividends and capital gains  distributions,
over a stated  period of time.  Average  annual  total return is  determined  by
computing  the annual  compound  return over a stated  period of time that would
have  produced  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.  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.

10   Information Regarding the Fund                 American Century Investments


     A tax-equivalent  yield demonstrates the taxable yield necessary to produce
after-tax  yield  equivalent  to that of a mutual  fund which  invests in exempt
obligations.  See  "Tax-Exempt  Securities,"  page 8, for a  description  of the
formula used in comparing yields to tax-equivalent yields.

     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 IBC's Money Fund Report) and  publications  that monitor
the  performance  of  mutual  funds.   Performance  information  may  be  quoted
numerically  or may be presented  in a table,  graph or other  illustration.  In
addition,  Fund  performance  may be  compared to  well-known  indices of market
performance  including  the IBC's Money Fund  Average and 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.

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

Prospectus                                   Information Regarding the Fund   11


                               HOW TO INVEST WITH
                          AMERICAN CENTURY INVESTMENTS

AMERICAN CENTURY INVESTMENTS

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

INVESTING IN AMERICAN CENTURY

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

     If  you  own  or  are   considering   purchasing  Fund  shares  through  an
employer-sponsored  retirement  plan or through a bank,  broker-dealer  or other
financial  intermediary,  the  following  sections,  as well as the  information
contained  in our Investor  Services  Guide,  may not apply to you.  Please read
"Employer-Sponsored Retirement Plans and Institutional Accounts," page 17.

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 $5,000.

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

     PLEASE NOTE: IF YOU REGISTER  YOUR ACCOUNT AS BELONGING TO MULTIPLE  OWNERS
(E.G., AS JOINT  TENANTS),  YOU MUST PROVIDE US WITH SPECIFIC  AUTHORIZATION  ON
YOUR  APPLICATION  IN ORDER FOR US TO ACCEPT  WRITTEN OR TELEPHONE  INSTRUCTIONS
FROM  A  SINGLE  OWNER.  OTHERWISE,  ALL  OWNERS  WILL  HAVE  TO  AGREE  TO  ANY
TRANSACTIONS  THAT INVOLVE THE ACCOUNT  (WHETHER THE  TRANSACTION  REQUEST IS IN
WRITING OR OVER THE TELEPHONE).

     You may invest in the following ways:

BY MAIL

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

BY WIRE

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

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

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

o    BENEFICIARY ACCOUNT NUMBER (BNF ACCT):
     2804918

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

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

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

      o     Taxpayer identification or Social Security number

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

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

12 How to Invest with American Century Investments  American Century Investments


BY EXCHANGE

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

IN PERSON

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

     4500 Main Street
     Kansas City, Missouri 64111

     1665 Charleston Road
     Mountain View, California 94043

     4917 Town Center Drive
     Leawood, Kansas 66211

     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," on this page) or by
any of the methods  below.  The minimum  investment  requirement  for subsequent
investments:  $250 for checks submitted without the investment slip portion of a
previous  statement  or  confirmation,  $50 for all  other  types of  subsequent
investments.

BY MAIL

     When making subsequent investments,  enclose your check with the investment
slip 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 12 and indicate your account number.

IN PERSON

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

AUTOMATIC INVESTMENT PLAN

     You may elect on your  application  to make  investments  automatically  by
authorizing us to draw on your bank account regularly.  Such investments must be
at least the  equivalent  of $50 per  month.  You also may  choose an  automatic
payroll or government  direct  deposit.  If you are  establishing a new account,
check the appropriate box under  "Automatic  Investments" on your application to
receive  more  information.  If you  would  like to add a direct  deposit  to an
existing account, please call 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 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 the  American  Century  Target
Maturities  Trust,  and at the close of the Exchange for all of our other funds.
See "When Share Price is Determined," page 18.

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

Prospectus                  How to Invest with American Century Investments   13


BY MAIL

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

BY TELEPHONE

     You can make exchanges over the telephone (either with an Investor Services
Representative or using our Automated Information Line--see page 15) if you have
authorized  us to  accept  telephone  instructions.  You can  authorize  this by
selecting "Full Services" on your application or by calling us at 1-800-345-2021
to get the appropriate form.

BY ONLINE ACCESS

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

HOW TO REDEEM SHARES

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

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

BY MAIL

     Your  written  instructions  to  redeem  shares  may be  made  either  by a
redemption form,  which we will send to you upon request,  or by a letter to us.
Certain  redemptions  may require a signature  guarantee.  Please see "Signature
Guarantee," page 15.

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

REDEMPTION PROCEEDS

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

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

BY CHECK

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

BY WIRE AND ACH

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

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

REDEMPTION OF SHARES IN LOW-BALANCE ACCOUNTS

     Whenever  the  shares  held in an  account  have a value  of less  than the
required  minimum,  a letter will be sent advising you of the necessity to bring
the value of the shares held in the account up to the minimum.  If action is not
taken within 90 days of the let-

14 How to Invest with American Century Investments  American Century Investments


ter'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:

     o   redeeming more than $25,000; or

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

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

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

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

SPECIAL SHAREHOLDER SERVICES

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

     Our special shareholder services include:

AUTOMATED INFORMATION LINE

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

ONLINE ACCOUNT ACCESS

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

CHECKWRITING

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

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

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

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

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

Prospectus                  How to Invest with American Century Investments   15


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

OPEN ORDER SERVICE

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

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

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

TAX-QUALIFIED RETIREMENT PLANS

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

     o   Individual Retirement Accounts (IRAs)

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

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

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

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

IMPORTANT POLICIES REGARDING YOUR INVESTMENTS

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

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

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

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

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

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

(6)   We have  established  procedures  designed to assure the  authenticity  of
      instructions  received by telephone.  These procedures  include requesting
      personal  identification  from callers,  recording  telephone  calls,  and
      providing   written   confirmations  of  telephone   transactions.   These
      procedures  are  designed to protect  shareholders  from  unauthorized  or
      fraudulent  instructions.  If we do not employ  reasonable  procedures  to
      confirm the genuineness of instructions, then we may be liable for losses

16 How to Invest with American Century Investments  American Century Investments


      due to unauthorized or fraudulent instructions.  The company, its transfer
      agent and investment  advisor will not be responsible  for any loss due to
      instructions they reasonably believe are genuine.

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

(8)   Unusual stock market  conditions  have in the past resulted in an increase
      in the number of shareholder telephone calls. If you experience difficulty
      in  reaching  us  during  such  periods,  you may  send  your  transaction
      instructions by mail,  express mail or courier  service,  or you may visit
      one of our Investor  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
transactions. See the Investor Services Guide for more detail.

     CAREFULLY  REVIEW ALL THE  INFORMATION  RELATING  TO  TRANSACTIONS  ON YOUR
STATEMENTS  AND  CONFIRMATIONS  TO ENSURE THAT YOUR  INSTRUCTIONS  WERE ACTED ON
PROPERLY.  PLEASE NOTIFY US IMMEDIATELY IN WRITING IF THERE IS AN ERROR.  IF YOU
FAIL TO PROVIDE  NOTIFICATION  OF AN ERROR  WITH  REASONABLE  PROMPTNESS,  I.E.,
WITHIN 30 DAYS OF  NON-AUTOMATIC  TRANSACTIONS  OR WITHIN 30 DAYS OF THE DATE OF
YOUR CONSOLIDATED QUARTERLY STATEMENT, IN THE CASE OF AUTOMATIC TRANSACTIONS, WE
WILL DEEM YOU TO HAVE RATIFIED THE TRANSACTION.

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

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

EMPLOYER-SPONSORED RETIREMENT PLANS AND
INSTITUTIONAL ACCOUNTS

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

     If  you  own  or  are   considering   purchasing  Fund  shares  through  an
employer-sponsored retirement plan, your ability to purchase shares of the Fund,
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.

Prospectus                  How to Invest with American Century Investments   17


                     ADDITIONAL INFORMATION YOU SHOULD KNOW

SHARE PRICE

WHEN SHARE PRICE IS DETERMINED

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

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

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

     Investment and transaction  instructions received by us on any business day
by mail before the net asset value is determined  will receive that day's price.
Investments  and  instructions  received  after that time will receive the price
determined on the next business day.

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

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.  Depending on local convention or regulation,  securities  traded
over-the-counter  are priced at the mean of the latest bid and asked prices,  or
at the last sale  price.  When  market  quotations  are not  readily  available,
securities and other assets are valued at fair value as determined in accordance
with procedures adopted by the Board of Trustees.

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

WHERE TO FIND INFORMATION ABOUT SHARE PRICE

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

DISTRIBUTIONS

     At the close of each day, including  Saturdays,  Sundays and holidays,  net
income plus net realized gains on portfolio securities of the Fund is determined
and declared as a distribution. The distribution will be

18   Additional Information You Should Know         American Century Investments


paid monthly on the last Friday of each month, except for year-end distributions
which will be made 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 18. If you
redeem  shares,  you will receive the  distribution  declared for the day of the
redemption.  If all shares are redeemed, the distribution on the redeemed shares
will be included with your redemption proceeds.

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

TAX-DEFERRED ACCOUNTS

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

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

TAXABLE ACCOUNTS

     If Fund shares are purchased through taxable accounts, distributions of net
investment  income  and net  short-term  capital  gains  are  taxable  to you as
ordinary income, except as described below. The dividends from net income of the
Fund do not qualify for the 70%  dividends-received  deduction for  corporations
since they are derived  from  interest  income.  Dividends  representing  income
derived from tax-exempt bonds generally retain the bonds'  tax-exempt  character
in a shareholder's hands.  Distributions that represent short-term capital gains
are taxable as ordinary income.  Distributions  from net long-term capital gains
are taxable as long-term capital gains regardless of the length of time you have
held the shares on which such distributions are paid.  However,  you should note
that any loss realized upon the sale or redemption of shares held for six months
or less  will be  treated  as a  long-term  capital  loss to the  extent  of any
distribution of long-term capital gain to you with respect to such shares.

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

     In January of the year following the distribution,  you will receive a Form
1099-DIV  notifying you of the status of your  distributions  for federal income
tax purposes. The Fund anticipates that substantially all

Prospectus                           Additional Information You Should Know   19


of the dividends to be paid by the Fund will be exempt from federal income taxes
to an individual  unless,  due to that person's own tax situation,  he or she is
subject  to the  alternative  minimum  tax.  In that case,  it is likely  that a
portion of the dividends will be taxable to that  shareholder,  while  remaining
tax-exempt  in the  hands  of most  other  shareholders.  The Fund  will  advise
shareholders  of the  percentage,  of the  dividends,  if any,  not exempt  from
federal  income  tax,  and the  percentage,  if any,  subject to the  individual
alternative minimum tax should a shareholder be subject to it.

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

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

SPECIAL TAX INFORMATION

     The Fund intends to invest a sufficient  portion of its assets in state and
municipal obligations so that it will qualify to pay "exempt-interest dividends"
to shareholders.  Such exempt-interest dividends are generally excludable from a
shareholder's  gross  income  for  federal  tax  purposes.  If the  Fund  earned
federally  taxable  income  from any of its  investments,  the  income  would be
distributed to shareholders as a taxable dividend as described above.

MUNICIPAL SECURITIES

     Opinions  relating  to  the  validity  of  municipal   securities  and  the
exemptions  of interest  thereon  from  federal  income tax are rendered by bond
counsel to the  issuers.  The Fund and the  Manager  rely on the opinion of bond
counsel  and do not  undertake  any  independent  investigation  of  proceedings
relating to the issuance of state or municipal  securities.  The Fund may invest
in various  instruments that are not traditional state and local obligations and
that are believed to generate interest excludable from taxable income under Code
Section 103,  including,  but not limited to,  municipal  lease  obligations and
inverse floaters. Although the Fund may invest in these instruments, they cannot
guarantee  the  tax-exempt  status of the income  earned  thereon from any other
investment.

ALTERNATIVE MINIMUM TAX LIABILITY

     To the extent  that the Fund  invests  in  municipal  obligations  (private
activity  bonds)  whose  interest  is  treated  as  a  tax  preference  item  in
calculating  alternative  minimum  tax  liability,  shareholders  who  calculate
alternative  minimum tax liability  will be required to include a portion of the
Fund's  dividends  as a tax  preference  item in  making  this  calculation.  In
addition,  corporate  shareholders  may be required to include all dividends and
distributions by the Fund in an adjustment of alternative minimum taxable income

20   Additional Information You Should Know         American Century Investments


for purposes of the alternative  minimum tax and the  environmental  tax imposed
under Internal Revenue Code Sections 55 and 59A, respectively.

MANAGEMENT

INVESTMENT MANAGEMENT

     American  Century-Benham  Limited-Term  Tax-Free  Fund is a  series  of the
American  Century  Municipal  Trust (the  "Trust"),  organized  a  Massachusetts
business  trust on May 1, 1984,  formerly known as the Benham  Municipal  Trust.
Under the laws of the  Commonwealth of  Massachusetts,  the Board of Trustees is
responsible for managing the business and affairs of the Trust.

     Acting pursuant to an investment management agreement entered into with the
Trust,  American Century Investment  Management,  Inc. (the "Manager") serves as
the  investment  manager of the Fund.  The Manager  pays all the expenses of the
Fund except brokerage,  taxes, interest, fees and expenses of the non-interested
person  Trustees  (including  counsel  fees)  and  extraordinary  expenses.  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 other clients since 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 managers, assistant portfolio managers and analysts acting together to
manage the  assets of the Fund.  The teams meet  regularly  to review  portfolio
holdings  and to discuss  purchase  and sale  activity.  The Fund's team adjusts
holdings  in the  portfolio  as it deems  appropriate  in  pursuit of the Fund's
investment objective.  Individual portfolio manager members of the team may also
adjust portfolio holdings of the Fund as necessary between team meetings.

     The portfolio  manager members of the team managing the Fund and their work
experience for the last five years are as follows:

     JOEL SILVA joined Benham  Management  Corporation  ("BMC") a predecessor of
the Manager, in 1989, serving first as a customer service  representative,  then
moving to position as a municipal bond trader. As a Municipal Portfolio Manager,
Mr. Silva is a member of the teams that manage  Benham  tax-exempt  and tax-free
funds.

     COLLEEN M.  DENZLER,  Senior  Municipal  Portfolio  Manager,  joined BMC in
January  1996 and is a member of the team that manages the Fund and other Benham
tax-exempt and tax-free funds. Prior to joining BMC, Ms. Denzler was a portfolio
manager with the Calvert Group for 10 years,  specializing  in state  tax-exempt
portfolios.  Ms. Denzler is a Chartered Financial Analyst and is a member of the
Association  for Investment  Management  and Research  (AIMR) and The Washington
Society of Investment Analysts.

     G.  DAVID  MACEWEN  joined  BMC in 1991  as a  Senior  Municipal  Portfolio
Manager,  and is a member of the teams that manages other Benham  tax-exempt and
tax-free  funds.  Prior to joining  BMC,  Mr.  MacEwen  was Vice  President  and
Municipal   Portfolio   Manager   with   Provident   Institutional    Management
Corporation, Wilmington, Delaware.

     The  activities  of the Manager are subject  only to the  direction  of the
Board of Trustees.  Each series of the Trust (except Limited-Term Tax-Free) pays
the Manager a monthly investment advisory fee equal to its pro rata share of the
dollar amount  derived from applying the Trust's  average daily net assets to an
investment  advisory fee  schedule.  For the services  provided to  Limited-Term
Tax-Free,  the  Manager  receives a monthly fee of the average net assets of the
Fund.  The annual rate at which this fee is assessed is determined  monthly in a
two-step process:  First, a fee rate schedule is applied to the assets of all of
the bond funds managed by the Manager (the "Investment Category Fee"). Second, a
separate  fee rate  schedule is applied to the assets of all of the mutual funds
managed by the Manager (the "Complex Fee"). The Investment  Category Fee and the
Complex Fee are then added to determine  the unified  management  fee payable by
the Fund to the Manager.  Currently,  the  Investment  Category Fee is an annual
rate of 0.21% of the  average  net  assets of the fund.  The  Complex  Fee is an
annual rate of 0.30% of the average net assets of the Fund. Further  information
about the calculation of the annual management fee is contained in the Statement
of Additional Information.

     On the first  business day of each month,  the Fund pays a  management  fee
to the Manager for the previ-

Prospectus                           Additional Information You Should Know   21


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

TRANSFER AND ADMINISTRATIVE SERVICES

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

     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 Fund 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  program.  The  Manager  or an
affiliate  may  enter  into  contracts  to pay them for such  recordkeeping  and
administrative services out of its 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
Manager.  You  should be aware of the fact that these  transactions  may be made
directly with American Century without incurring such fees.

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

     The  Manager  and the  transfer  agent are both  wholly  owned by  American
Century Companies, Inc. James E. Stowers Jr., Chairman of the Board of Directors
of American Century Companies, Inc., owns a majority of its common stock.

DISTRIBUTION OF FUND SHARES

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

FURTHER INFORMATION ABOUT AMERICAN CENTURY

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

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

     Each  share is  entitled  to one vote for each  dollar of net  asset  value
applicable to such share on all questions.  Matters  affecting only one fund are
voted upon only by that fund.

     Shares have non-cumulative  voting rights,  which means that the holders of
more than 50% of the votes cast in an election of Trustees can elect all of the

22   Additional Information You Should Know         American Century Investments


Trustees if they choose to do so, and in such event the holders of the remaining
votes will not be able to elect any person or persons to the Board of Trustees.

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

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


Prospectus                           Additional Information You Should Know   23


                                     NOTES

24   Notes                                          American Century Investments


                                     NOTES


                                                                      Notes   25


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

Person-to-person assistance:
1-800-345-2021 or 816-531-5575

Automated Information Line:
1-800-345-8765

Telecommunications Device for the Deaf:
1-800-634-4113 or 816-444-3485

Fax: 816-340-7962

Internet: www.americancentury.com

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