Standard&Poor's Ratings Services assigned its AA+ ratings to Nashville&Davidson County Metropolitan Government, Tenn.'s series 2015A electric system revenue refunding bonds. At the same time, we affirmed the 'AA+' rating on the system's outstanding electric system revenue bonds. The outlook is stable. The rating reflects the general creditworthiness of the consolidated government's electric system, doing business as Nashville Electric System (NES), and includes its: Consistently strong financial metrics, supported by robust policies that were recently revised to further enhance liquidity; Deep and diverse customer base in the stable Nashville metropolitan statistical area (MSA) economy, with what we view as strong income indicators; and Role as a distributor of Tennessee Valley Authority (TVA) power and energy, which greatly