...Public Service Company of Oklahoma's (PSO) ratings reflect the company's integrated electric utility asset base and the improved regulatory environment in Oklahoma. The company owns 3,893MW of generating capacity and has long-term power purchase agreements (PPAs) on another 2,202MW, over half of which is wind. PSO is the least coal-exposed of the American Electric Power Company, Inc. (AEP) integrated utilities, with coal-fired generation accounting for only 9.4% of PSO's generating and capacity mix. The rating also reflects the relationship with parent company AEP, on which PSO relies for equity contributions and access to short-term liquidity....
