Standard&Poor's Ratings Services raised its general obligation (GO) rating, with a stable outlook, to 'AAA' from 'AA+', on Denver City and County, Colo. due to the maintenance of very strong fund balances. At the same time, Standard&Poor's raised the rating on various city lease secured obligations to 'AA+' from 'AA'. The upgrade includes city GO debt issued on behalf of the Denver Board of Water Commissioners. The city GO rating reflects our view of Denver's: Position as the center of a large and diverse metropolitan economy that serves as a regional trade and employment center; Steady maintenance of a large fund balance position and willingness to implement proactive midyear budget cutting when necessary to maintain general