Standard&Poor's Ratings Services affirmed its 'AA+' long-term rating on Southern California Home Financing Authority's series 2001A-1 and A-3 single-family mortgage revenue bonds. The outlook is negative. The bonds are secured by Ginnie Mae mortgage-backed securities and Fannie Mae pass-through certificates. The rating continues to reflect our view of: The sufficiency of revenues from mortgage debt service payments and investment earnings to pay full and timely debt service on the bonds until maturity; The extremely strong investment quality; and The 136.14% asset-to-liability ratio as of April 9, 2013. The rating also reflects the sovereign rating on the U.S. (AA+/Negative). Should the rating on the U.S. be raised to 'AAA' and the bond program meet all criteria commensurate with a