GMACCM Mortgage Trust I 1999-C and 1999-D Rated `AAA'.

NEW YORK--(BUSINESS WIRE)--Sept. 30, 1999--

GMACCM Mortgage Trust I's $86,411,025 variable rate class A insured notes, series 1999-C, and $78,576,888 variable rate class A insured notes, series 1999-D are rated 'AAA' by Fitch IBCA.

Both series are separately offered by private placements pursuant to Rule 144A of the Securities Act of 1933. These 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 series 1999-C notes represent beneficial ownership interests in a trust whose primary assets are eleven variable rate mortgage loans secured by 11 properties. Nine of the properties are office facilities, representing 61.4% of the pool asset balance, with one hotel property comprising 31.3% of the balance and the remaining 7.3% secured by one industrial property. The series 1999-D notes represent beneficial ownership interests in a trust whose primary assets are eight variable rate mortgage loans secured by seven properties. Five of the properties are office facilities, representing 45.9% of the pool asset balance, with one hotel property comprising 35.1% of the balance and the remaining 19.0% secured by one independent living facility.

The ratings reflect the credit enhancement provided to each series of class A notes by two separate insurance policies 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 policies provide 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 for both series, 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 transactions include the integrity of the legal and financial structures, including master and special servicing by GMAC Commercial Mortgage Corporation, rated 'CMS3' and 'CSS1' by Fitch IBCA, respectively. A negative factor is that the ratings are dependent solely upon the underlying credit of the provider of the insurance policies. 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.