NEW YORK (Standard&Poor's) May 20, 2010--Standard&Poor's Ratings Services corrected by lowering to 'AA+' from 'AAA' its long-term rating on Austin, Texas' series 2008A electric utility system revenue refunding bonds due Nov. 15, 2038. The outlook is stable. The bonds are guaranteed by a bond insurance policy from Berkshire Hathaway Assurance Corp (AA+/Stable). The bonds have an underlying rating (SPUR) of 'A+'. According to our criteria, the rating on a fully credit-enhanced bond issue is the higher of the rating on the credit enhancer and the SPUR on the bonds.