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Filed Pursuant to Rule 497(e)
Registration File No.: 2-82510
SUPPLEMENT TO THE PROSPECTUS OF
MORGAN STANLEY DEAN WITTER VARIABLE INVESTMENT SERIES,
CLASS X SHARES
DATED MAY 1, 2000
The European Growth Portfolio of the Fund has received authorization to
purchase and sell stock index futures contracts and options thereon. The
disclosure in the section entitled "Principal Investment Strategies" with
respect to the Portfolio's investments in options on foreign currencies on page
24 of the Prospectus is hereby revised as follows:
The Portfolio may invest up to 5% of its assets in put and call options
with respect to foreign currencies. The Portfolio may also purchase and
sell stock index futures contracts and options thereon. Stock index futures
and options thereon may be used to facilitate trading, to increase the
Portfolio's market exposure or to seek to protect against an increase in
the prices of securities that may be purchased.
Information regarding the risks of options and futures may be found on
page 45 of the Prospectus in the section entitled "Additional Risk
Information."
June 22, 2000
