The rating outlook on Polk County, Iowa's outstanding GO bonds and GO capital loan notes has been revised to positive from stable, reflecting the county's intention to implement more sophisticated management practices. The 'AA+' standard long-term and Standard&Poor's underlying rating (SPUR) on the bonds and the 'A+ standard long-term rating on the notes have been affirmed. The rating also reflects the county's: Participation in the strong and diverse Des Moines, Iowa MSA economy; Economic vitality and growth stemming from considerable public and private investment in substantial capital projects; Conservative management policies, which have resulted in consistent trends; and Moderate overall net debt levels and manageable capital needs. The county's full faith and credit pledge secures both the outstanding