CHICAGO (Standard&Poor's) Feb. 6, 2013--Standard&Poor's Ratings Services said today that it raised its underlying rating on Michigan Finance Authority's (MFA) series 2010A-C school loan revolving fund revenue and refunding bonds to 'AA' from 'AA-'. We also raised our long-term rating on the MFA's series 2010D bonds to 'AA' from 'AA-'. The outlook on all the ratings is stable. "The upgrade reflects our view of the enterprise risk and financial risk of the program," said Standard&Poor's credit analyst Scott Garrigan. We also affirmed our 'AAA' long-term rating on the series 2010A-C bonds based on the application of the low-correlation joint criteria table where we rate the MFA 'AA', with the following letter of credit (LOC)