shares of american electric power co inc aep slipped 233 to 8797 tuesday on what proved to be an allaround rough trading session for the stock market with the sp 500 index spx falling 030 to 397015 and dow jones industrial average djia falling 071 to 3265670 this was the stocks sixth consecutive day of losses american electric power co inc closed 1763 below its 52week high 10560 which the company reached on september 12th the stock underperformed when compared to some of its competitors tuesday