BOSTON (Standard&Poor's) Aug. 1, 2013--Standard&Poor's Ratings Services has assigned its 'AA+' rating to the State of Minnesota?s general obligation (GO) series 2013 A, B, and C bonds. At the same time, Standard&Poor's affirmed its 'AA+' rating on Minnesota's GO state bonds. Standard&Poor's also affirmed its 'AA' rating on the state's appropriation debt outstanding and its 'A+' rating on an issue backed by the state's moral obligation. The outlook is stable. "Credit factors supporting the ratings include our view of the state's deep and diverse economy, improved financial results, and moderate debt levels," said Standard&Poor's credit analyst Henry Henderson. The GO bonds are general obligations of the state, for which its