NEW YORK--(BUSINESS WIRE)--Fitch Ratings assigns an 'AA-' rating to the following series of bonds expected to be issued on behalf of UPMC: --$150,000,000 Pennsylvania Economic Development Financing Authority (PEDFA) revenue bonds series 2015B. Fitch also affirms the 'AA-' rating on UPMC's outstanding parity debt issued through the Pennsylvania Higher Educational Facilities Authority, Allegheny County Hospital Development Authority, University of Pittsburgh Medical Center, Monroeville Finance Au