NEW YORK (Standard&Poor's) Aug. 15, 2012--Standard&Poor's Ratings Services has assigned its 'AA' long-term rating to Mayo Clinic, Minn.'s $300 million series 2012B taxable revenue bonds. Standard&Poor's also affirmed its 'AA' long-term ratings and its 'AA/A-1+' and 'AA/A-1' dual ratings on various issuers' debt issued for, or guaranteed by, the Mayo Clinic. "Since we raised the long-term ratings on Mayo Clinic to 'AA' from 'AA-' in April 2011, the health care system has performed extremely well operationally, and posted excellent performance in 2011 from all its major revenue areas, including clinical services and research, as well as very strong fundraising," said Standard&Poor's credit analyst Martin Arrick. "The stable outlook reflects our expectation that
