The rating on Merrill Lynch Puttable FLOATs/RITES Trust puttable floating option tax-exempt receipts series PT-399, relating to Minnesota general obligation state various purpose and state refunding bonds, has been affirmed following an amendment to the trust documents. The long-term component of the rating is based on the MBIA-insured underlying bond. The short-term component of the rating is based on DEPFA BANK PLC. The expiration date of the liquidity facility is Sept. 15, 2006. The stable outlook is based on the outlook of the bond insurer.