CHICAGO (Standard&Poor's) Jan. 13, 2016--Standard&Poor's Ratings Services revised the outlook on its 'AA' issuer credit rating (ICR) on Iowa Finance Authority (IFA) to positive from stable. At the same time, the rating service revised the outlooks on its 'AA' and 'AA/A-1+' ratings on the authority's general obligation (GO) debt and variable-rate debt, respectively, to positive from stable. Standard&Poor's also affirmed its 'AA' ICR on the authority and its 'AA' and 'AA/A-1+' ratings on the authority's GO and variable-rate debt, respectively. Finally, Standard&Poor's affirmed its 'AA+' and 'AA+/A-1+' ratings, with stable outlooks, on the authority's single-family mortgage bonds. The positive outlook reflects Standard&Poor's opinion of the quality of IFA's overall improved