BOSTON (Standard&Poor's) July 23, 2008--Standard&Poor's Ratings Services assigned its 'AAA' rating to Massachusetts Health and Educational Facilities Authority's series N revenue bonds, issued for Massachusetts Institute of Technology (MIT). Standard&Poor's also affirmed its 'AAA' and 'A-1+' ratings on debt previously issued for MIT. The ratings reflect the university's unconditional general obligation pledge, supported by overwhelming demand, excellent student quality, and increasingly competitive admissions. Additional credit strengths include the university's status as a preeminent research institute, with a strong endowment having a market value at roughly $10 billion as of June 30, 2007, and impressive financial resources, with expendable resources equaled to 4.3X operating expenses and 7X pro forma debt. Strong revenue diversity and demonstrated