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SUPPLEMENT TO THE PROSPECTUS OF
MORGAN STANLEY DEAN WITTER SELECT DIMENSIONS
INVESTMENT SERIES
DATED MARCH 2, 1998, REVISED MAY 1, 1998
The sentences referring to the portfolio co-managers of the GROWTH PORTFOLIO in
the subsection entitled "Portfolio Management" under the section of the
Prospectus entitled "INVESTMENT OBJECTIVES AND POLICIES" are hereby replaced by
the following:
Philip Friedman, a Managing Director of MSAM, Margaret Johnson, a
Principal of MSAM, and William Auslander, a Vice President of MSAM,
are all portfolio managers in MSAM's Institutional Equity Group and
have been the primary portfolio co-managers of the GROWTH PORTFOLIO
since September, 1998 in the case of Messrs. Friedman and Auslander,
and since March, 1998 in the case of Ms. Johnson. Prior to joining
MSAM in 1997, Mr. Friedman was the North American Director of Equity
Research at Morgan Stanley & Co. Incorporated, and from 1990 to 1995
he was a member of the Equity Research team at Morgan Stanley & Co.
Incorporated. Ms. Johnson has been a portfolio manager with MSAM for
over five years. Mr. Auslander joined MSAM in 1995 as an equity
analyst in the Institutional Equity Group. Prior to joining MSAM, Mr.
Auslander was an equity analyst at Icahn & Co. for nine years.
September 25, 1998
