GMACCM Mortgage Trust I 1999-B Rated `AAA' by Fitch IBCA.

NEW YORK--(BUSINESS WIRE)--Sept. 28, 1999--

GMACCM Mortgage Trust I's $60,281,865 variable rate class a insured notes, series 1999-B, are rated `AAA' by Fitch IBCA. The notes are offered by private placement pursuant to Rule 144A of the Securities Act of 1933. The ratings address the likelihood of timely payment of interest and principal. The ratings do not address the possibility that the holders of the Notes might suffer a lower than anticipated yield, or the receipt of default interest, prepayment premiums, or excess interest.

The Notes represent beneficial ownership interests in the trust, the primary assets of which are 11 variable rate mortgage loans secured by 11 properties. Seven of the properties are assisted living facilities, representing 67% of the pool asset balance, with 22% secured by two properties providing both assisted and independent living facilities, and 11% secured by two skilled nursing properties.

The ratings reflect the credit enhancement provided to the Class A Notes by an insurance policy issued by American International Specialty Lines Insurance Company (AISLIC), an indirect wholly owned subsidiary of American International Group, Inc. (AIG). Fitch IBCA rates AIG `AAA' Long-term and `F-1+' Short-term. Fitch IBCA also assigns a `AAA' rating to the claims paying ability of AISLIC. The insurance policy provides for the timely payment of principal and interest on the Class A Notes to the extent that there is a payment shortfall from the underlying commercial mortgage assets. The Insurer indemnifies the Trustee, LaSalle Bank National Association, for the benefit of the noteholders for any periodic loss with respect to each payment date. Other positive features of the transaction include the integrity of the legal and financial structure, including master and special servicing by GMAC Commercial Mortgage Corporation, rated "CMS3" and "CSS1" by Fitch IBCA, respectively. A negative factor is that the rating is dependent solely upon the underlying credit of the insurance policy provider. Any adverse conditions experienced by American International Specialty Lines Insurance Company or American International Group, Inc. may have an adverse effect on the ratings on the Notes.