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SUPPLEMENT TO THE PROSPECTUS OF
DEAN WITTER SELECT DIMENSIONS INVESTMENT SERIES
DATED MAY 1, 1997
The sentences pertaining to the DIVERSIFIED INCOME PORTFOLIO in the subsection
entitled "Portfolio Management" under the subsection entitled "General Portfolio
Techniques" in the section of the Prospectus entitled "INVESTMENT OBJECTIVES AND
POLICIES" are hereby replaced by the following:
Peter M. Avelar and Rajesh K. Gupta, Senior Vice Presidents of
InterCapital, and Anne Pickrell and Peter J. Seeley, Vice Presidents of
InterCapital, are the primary portfolio co-managers of the DIVERSIFIED
INCOME PORTFOLIO, Messrs. Avelar and Gupta since the inception of the
Portfolio and Ms. Pickrell and Mr. Seeley since February 1998. Messrs.
Avelar and Gupta and Ms. Pickrell have been portfolio managers at
InterCapital for over five years. Prior to joining InterCapital in July
1994, Mr. Seeley was a portfolio manager at Nikko Capital Management.
February 2, 1998
