NEW YORK (Standard&Poor's) Nov. 9, 2012--Standard&Poor's Ratings Services assigned its 'A+' rating and stable outlook to the District of Columbia's multi-modal general obligation (GO) series 2008A and D bonds. At the same time, Standard&Poor's affirmed its 'A+' rating and underlying rating (SPUR) on the district's existing GO debt and its 'A' rating and SPUR on the district's existing certificates of participation. "The 'A+' rating reflects our assessment of the district's current sufficient liquidity levels to meet its contingent liabilities and recent positive general fund financial performance," said Standard&Poor's credit analyst Le T. Quach. Additional credit strengths, in our view, are the district's: Role as the nation's capital and as a regional employment