SECTION 906 CERTIFICATION

Certification Pursuant to 18 U.S.C. Section 1350,
As Adopted Pursuant to
Section 906 of the Sarbanes-Oxley Act of 2002

Morgan Stanley S&P 500 Index Fund

     In connection with the Report on Form N-CSR (the “Report”) of the above-named issuer for the period ended February 28, 2010 that is accompanied by this certification, the undersigned hereby certifies that:

1.	The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and
2.	The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Issuer.

Date: April 15, 2010	/s/ Randy Takian
	Randy Takian
	Principal Executive Officer

A signed original of this written statement required by Section 906 has been provided to Morgan Stanley S&P 500 Index Fund and will be retained by Morgan Stanley S&P 500 Index Fund and furnished to the Securities and Exchange Commission or its staff upon request.

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SECTION 906 CERTIFICATION

Certification Pursuant to 18 U.S.C. Section 1350,
As Adopted Pursuant to
Section 906 of the Sarbanes-Oxley Act of 2002

Morgan Stanley S&P 500 Index Fund

     In connection with the Report on Form N-CSR (the “Report”) of the above-named issuer for the period ended February 28, 2010 that is accompanied by this certification, the undersigned hereby certifies that:

1.	The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and
2.	The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Issuer.

Date: April 15, 2010	/s/ Francis Smith
	Francis Smith
	Principal Financial Officer

A signed original of this written statement required by Section 906 has been provided to Morgan Stanley S&P 500 Index Fund and will be retained by Morgan Stanley S&P 500 Index Fund and furnished to the Securities and Exchange Commission or its staff upon request.

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