SEC Form 3, Form 4 and Form 5 and Application for EDGAR Access
    (Form ID) Confirmation of Authority to Sign

Pursuant to Instruction 7 to SEC "Form 3 - Initial Statement of Beneficial
Ownership of Security," "Form 4--Statement of Changes in Beneficial Ownership"
and "Form 5 - Annual Statement of Beneficial Ownership of Securities" the
undersigned, being a Vice President of MassMutual Corporate Investors and
MassMutual Participation Investors (each, a "Trust"), hereby appoint and
designate Sara Stinson, Mark Godin, Melissa Busso, Ruth Howe, Ann Malloy
and Melissa LaGrant and each of them singly, my true and lawful power of
attorney with full power to (a) apply for access to the EDGAR filing system in
my name and (b) sign for me and file with the Securities and Exchange
Commission, the New York Stock Exchange and the Trust said SEC Forms 3 4 and/or
5 with respect to shares of the Trust purchased or sold by the undersigned or
any other change of beneficial ownership relating to equity or derivative
securities of the Trust required to be reported by the undersigned.

This authorization shall remain in effect until a written revocation is
executed by the undersigned and filed with the Securities and Exchange




Signature and Date:
                   ----------------------------------------------
Name:    Michael P. Hermsen
Title:   Vice President of MMCI and MMPI