AMERICAN CENTURY WORLD MUTUAL FUNDS, INC.
Prospectus Supplement
GLOBAL GROWTH * INTERNATIONAL GROWTH
* INTERNATIONAL DISCOVERY * EMERGING MARKETS
Supplement dated October 1, 1999 * Prospectus dated April 1, 1999
The following replaces the chart under the heading "What are the funds' primary
investment strategies and principal risks?" on page 2 of the Investor Class,
Advisor Class and Institutional Class prospectuses.
<TABLE>
Fund Primary Investments Principal Risks
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<S> <C> <C>
Global Growth U.S. and foreign equity securities of Invests a significant portion of
issuers in developed countries its assets in foreign securities
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International Growth Equity securities in developed Invests primarily in
foreign countries foreign securities
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International Discovery Equity securities of small- to Invests primarily in small- to
medium-sized foreign companies medium-sized foreign issuers
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Emerging Markets Equity securities of emerging market Invests primarily in emerging
companies markets
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</TABLE>
The following replaces the third paragraph under the heading "What is the
difference between the funds?" on page 6 of the Investor Class, Advisor Class
and Institutional Class prospectuses.
* International Discovery invests primarily in small- to medium-sized foreign
companies. The fund will have at least 65% of its assets invested at all
times in equity securities of small- to medium-sized foreign companies.
The following replaces the chart and first paragraph on page 13 of the Investor
Class prospectus.
MINIMUM INITIAL INVESTMENT AMOUNTS
To open an account, Global Growth International Discovery
the minimum investments are: International Growth Emerging Markets
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Individual or Joint $2,500 $10,000
Traditional IRA $1,000 $10,000
Roth IRA $1,000 $10,000
Education IRA $500 N/A
UGMA/UTMA $2,500 $10,000
403(b) No minimum $10,000
Qualified Retirement Plan $2,500(1) $10,000
(1) The minimum investment requirements may be different for some types of
retirement plans.
REDEMPTION OF SHARES IN LOW-BALANCE ACCOUNTS
If your redemption activity causes your account balance to fall below the
minimum initial investment amount, we will notify you and give you 90 days to
meet the minimum. If you do not meet the deadline, American Century will redeem
the shares in the account and send the proceeds to your address of record.
SH-SPL-18119 9909
