Standard&Poor's Ratings Services affirmed its 'A-1+' commercial paper rating on Massachusetts Health and Educational Facilities Authority's revenue bonds, series EE, issued for Harvard University. The authorized amount of revenue notes is increasing to $1 billion from the previous authorization amount of $650 million. At the same time, Standard&Poor's affirmed its 'AAA' long-term rating on the university's revenue bonds and its 'A-1+' short-term rating on the university's variable-rate demand bonds and CP notes. The 'A-1+' rating reflects Harvard's general credit strengths and considerable experience in managing its own liquidity. Harvard demonstrates ample liquid assets of high credit quality, largely in U.S. Treasuries, that can be used to cover the purchase price of variable-rate demand bonds or CP