Standard&Poor's Ratings Services raised its standard long-term rating and underlying rating (SPUR) on Sioux City, Iowa's general obligation (GO) debt one notch to 'AA' from 'AA-' based on the city's maintenance of a very strong financial position, boosted by available reserves outside the general fund. The outlook is stable. Standard&Poor's assigned its 'AA' standard long-term rating, and stable outlook, to the city's series 2009A-2009D GO bonds. In our opinion, the ratings further reflect the city's: Position as a regional economic and employment center, Adequate wealth and income indicators, and Low-to-moderate overall debt burden with rapid principal amortization. The city's GO pledge secures the bonds. Officials will use series 2009A-2009C bond proceeds to fund capital improvements related