Exhibit 31.2

SECTION 302 CERTIFICATION

I, Robert Qutub, certify that:

1. I have reviewed this Amendment No. 1 to the Quarterly Report on Form 10-Q/A of MSCI Inc.; and

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report.

Date: November 16, 2012

/s/ Robert Qutub

Robert Qutub

Chief Financial Officer

(Principal Financial Officer and
Principal Accounting Officer)