Standard&Poor's Ratings Services raised its rating on Maricopa County Community College District, Ariz.'s outstanding GO bonds to 'AAA' from 'AA+' and assigned its 'AAA' rating to the district's $240 million series 2007B GO bonds. The raised rating reflects the district's continued exceptionally strong and stable financial performance, as well as diverse revenue streams and good financial management practices and policies. The raised rating also reflects the district's continued financial flexibility with regard to competitive tuitions and fees and continued strong growth in district assessed valuation (AV). AV averaged 10% annually over the past five years, and is especially significant given the size of the tax base, which now exceeds $268 billion, larger than that of many U.S. states.