NEW YORK--(BUSINESS WIRE)--Fitch Ratings has affirmed its 'F1+' rating on approximately $49 million of outstanding variable-rate general revenue bonds (GRBs) issued by the University of North Carolina Board of Governors on behalf of the University of North Carolina at Chapel Hill (UNC-CH). SECURITY GRBs are secured by legally defined available funds of UNC-CH (pledged revenues), including unrestricted general fund balances and unrestricted quasi-endowment fund balances ($1.95 billion in fiscal