The 'AA-' Standard&Poor's underlying rating (SPUR) on District of Columbia's revenue bonds, issued for Association of American Medical Colleges (AAMC), reflects: The association's unique niche in medical school entrance testing and medical school accreditation; Continued generation of strong operating surpluses; and Good financial strength in the form of unrestricted fund balances. The 'A-1+' short-term rating on series 1999 bonds is based on an SBPA provided by NationsBank, N.A. The SBPA ensures that sufficient funds are available to pay the purchase price of bonds tendered but not remarketed and has a stated expiration date of Sept. 1, 2001. The 'A-1' rating on series 1996 and 1997B bonds is also affirmed and reflects an SBPA provided by Chase Bank to
