AMERICAN CENTURY MUNICIPAL TRUST
PROSPECTUS SUPPLEMENT
Tax-Free Money Market * Limited-Term Tax-Free
Intermediate-Term Tax-Free * Long-Term Tax-Free
High-Yield Municipal
SUPPLEMENT DATED JUNE 25, 1999
Prospectus dated August 31, 1998
The following disclosure set forth below replaces paragraphs four through seven
under the heading "Investment Management" found on page 28 of the Investor Class
Prospectus:
G. DAVID MACEWEN, Senior Vice President and Portfolio Manager, supervises
the American Century Municipal Trust team. He has been a member of the team that
manages Long-Term Tax-Free since May 1991 and Limited-Term Tax-Free since June
1999. He joined American Century in May 1991 as a Municipal Portfolio Manager.
He has a bachelor's degree in economics from Boston University and an MBA in
finance from the University of Delaware.
STEVEN M. PERMUT, Vice President, Director of Municipal Research and
Portfolio Manager, has been a member of the High-Yield Municipal team since its
inception in March 1998. He joined American Century in June 1987. He has
bachelor's degrees in business and geography from State University of New York
- -- Oneonta and an MBA in finance from Golden Gate University -- San Francisco.
BRYAN E. KARCHER, Portfolio Manager, has been a member of the team that
manages Tax-Free Money Market since June 1995 and Limited-Term Tax-Free since
June 1999. He joined American Century in July 1989 and has been a Portfolio
Manager since June 1995. He has a bachelor's degree in economics from the
University of California -- Los Angeles. He is a Chartered Financial Analyst.
KEN SALINGER, Portfolio Manager, has been a member of the team that manages
Intermediate-Term Tax-Free since June 1999. He joined American Century in April
1992. He has a bachelor's degree in quantitative economics from the University
of California -- San Diego.
P.O. Box 419200
Kansas City, Missouri
64141-6200
1-800-345-2021 or 816-531-5575
[american century logo(reg.sm)]
American
Century
SH-SPL-17200 9906
