DALLAS (Standard&Poor's) Feb. 20, 2013--Standard&Poor's Ratings Services raised its issuer credit rating (ICR) one notch to 'A+' from 'A' on Sweetwater Independent School District, Texas' general obligation (GO) bonds outstanding. At the same time, Standard&Poor's affirmed its 'AAA' enhanced program rating on the district's GO bonds outstanding. The outlook on all ratings is stable. "The raised rating is due primarily to our view of the district's substantially improved financial position," said Standard&Poor's credit analyst Lauren Spalten. The 'A+' ICR also reflects our view of the district's: Expanding property tax base and stable student enrollment; Strong wealth and good income levels; and Low overall net debt burden of market value, coupled with limited