AUSTIN, Texas--(BUSINESS WIRE)--Fitch Ratings has assigned an 'AA+' rating to the Fort Worth, Texas $128.4 million (est.) general purpose refunding and improvement bonds, series 2015A. The bonds are scheduled for a competitive sale on July 28. Proceeds will finance various public improvements and refund a portion of the city's outstanding tax-supported debt for interest savings. In addition, Fitch affirms the following ratings: --$504.6 million outstanding Fitch-rated general purpose bonds and