The ratings on Merrill Lynch Puttable FLOATs/RITES Trust puttable floating option and residual interest tax-exempt receipts series PT-4298, relating to Colorado Housing and Finance Authority single family mortgage bonds, class II bonds 2006, have been affirmed due to a review of the amendment memorandum and amendment to the series trust agreement and other relevant documents, from which Standard&Poor's Ratings Services concludes that the amendment will not result in a reduction or withdrawal of the current ratings we have assigned to the captioned P-FLOATs