NEW YORK (Standard&Poor's CreditWire) April 26, 1999--Standard&Poor's today assigned its double-'A' rating to Nashville and Davidson County Metropolitan Government, Tenn.'s $175 million GO multipurpose refunding bonds series 1999A dated May 15, 1999, due May 15, 2026. The bonds are scheduled to sell on April 28, 1999. Additionally, Standard&Poor's affirmed its double-'A' rating on Nashville and Davidson County's outstanding debt (see table). Bonds are secured by the full faith and credit of the Nashville, Tenn. metropolitan government. The double-'A' rating reflects: --A deep and diverse economic base, --Above-average wealth and income levels, --Low tax rates, --Strong management, --Adequate financial position, and --Moderate debt with a rapid amortization schedule. The rating takes into account the city's