Standard&Poor's Ratings Services assigned its 'AA-' long-term rating to Nashville&Davidson County Metropolitan Government Sports Authority, Tenn.'s series 2013A and 2013B public improvement revenue bonds, issued on behalf of the Nashville&Davidson County Metropolitan Government (Metro). At the same time, Standard&Poor's affirmed its 'AA' long-term and underlying rating (SPUR) on Metro's existing general obligation (GO) bonds. Finally, Standard&Poor's affirmed its 'A-1+' short-term rating on Metro's commercial paper (CP) program. The outlook, where applicable, is stable. The series 2013A and 2013B public improvement revenue bonds are secured by the revenues of sales tax rebate payments and tax increment financing revenues; for the series 2013B bonds only, team lease payments, and non-tax revenues of