CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM


We consent to the incorporation by reference in this Post-Effective Amendment
No. 11 to Registration Statement No. 333-29721 of Morgan Stanley S&P 500 Index
Fund (the "Fund"), on Form N-1A of our report dated October 21, 2004, appearing
in the August 31, 2004 Annual Report of the Fund, which is incorporated by
reference in the Prospectus and the Statement of Additional Information both of
which are part of such Registration Statement, and to the references to us under
the captions "Financial Highlights" in the Prospectus and "Custodian and
Independent Registered Public Accounting Firm" and "Financial Statements" in the
Statement of Additional Information.




Deloitte & Touche LLP
New York, New York
October 28, 2004