MAINSTAY INSTITUTIONAL FUNDS INC.
Institutional Class Shares
Institutional Service Class Shares
Supplement dated September 1, 1998
to the Prospectus dated May 1, 1998
Joseph Portera has assumed Shigemi Takagi's responsibilities as portfolio
manager of the International Equity Fund (the "Fund"). Mr. Takagi is no
longer with MacKay-Shields Financial Corporation, the investment
sub-adviser to the Fund. Mr. Portera's biography appears on page 27 of
the prospectus. Mr. Takagi's biography, which appears on page 22 of the
prospectus, is hereby deleted.