PLEASE FILE THIS STATEMENT OF ADDITIONAL INFORMATION SUPPLEMENT WITH YOUR
RECORDS.
STRONG INDEX 500 FUND
Supplement to the Statement of Additional Information dated July 1, 1999
Effective immediately, the third paragraph under "MASTER/FEEDER STRUCTURE" is
deleted and replaced with the following:
The investment objective and other fundamental policies of the Master Portfolio
cannot be changed without approval by the holders of a majority (as defined in
the 1940 Act) of the Master Portfolio's outstanding interests. Whenever the
Fund, as an interestholder of the Master Portfolio, is requested to vote on any
matter submitted to interestholders of the Master Portfolio, the Fund will
either (1) hold a meeting of its shareholders to consider such matters, and
cast its votes in proportion to the votes received from its shareholders
(shares for which the fund receives no voting instructions will be voted in the
same proportion as the votes received from the other Fund shareholders); or
(2) cast its votes, as an interestholder of the Master Portfolio, in proportion
to the votes received by the Master Portfolio from all other interestholders of
the Master Portfolio.
The date of this Statement of Additional Information Supplement is
April 13, 2000.
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