CHICAGO (Standard&Poor's) Sept. 26, 2013--Standard&Poor's Ratings Services said it assigned its 'AA' rating to Cook County Community College District No. 508 (City Colleges of Chicago), Ill.'s series 2013 unlimited-tax general obligation (GO) bonds. "The outlook is stable, reflecting our view that the district will maintain at least break-even operations before transfers in most years, and strong operational reserves," said Standard&Poor's credit analyst John Kenward. The rating reflects our view of the district's: Participation in the deep and diverse economy of Chicago, the center of a major multicounty metropolitan area; Large tax base that includes downtown Chicago; Recent history of positive financial operations before transfers to capital funds, with diverse operating revenue streams; and Strong