Exhibit 99.1

CERTIFICATION PURSUANT TO
18 U.S.C. SECTION 1350,
AS ADOPTED PURSUANT TO
SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Quarterly Report of Moody’s Corporation (the “Company”) on Form 10-Q for the period ended June 30, 2002 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, John Rutherfurd, Jr., Chief Executive Officer of the Company, certify, pursuant to 18 U.S.C. § 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that to the best of my knowledge:

         (1) the Report fully complies with the requirements of section 13(a) 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 Company.

/s/ JOHN RUTHERFURD, JR.

John Rutherfurd, Jr.
Chief Executive Officer

August 14, 2002

28