Standard&Poor's Ratings Services lowered its rating on Michigan State Hospital Finance Authority's (Trinity Health) variable-rate refunding and revenue bonds (Trinity Health Credit Group) series 2000E to 'AAA/A-1' from 'AAA/A-1+' due to the substitution of a SBPA provided by JPMorgan Chase Bank N.A. (A-1+) with a SBPA provided by Comerica Bank (A-1). The 'AAA' long-term component of the rating is based on the credit quality of the insurance provider, Ambac Assurance Corp. (AAA). The substitute SBPA being provided by Comerica Bank (A-1) has an effective date of Jan. 18, 2008, and shall provide coverage for principle and 34 days of interest at 12% for the purchase price of bonds that are not successfully remarketed. The SBPA is scheduled to
