shares of capital one financial corp cof slid 278 to 9569 wednesday on what proved to be an allaround grim trading session for the stock market with the sp 500 index spx falling 041 to 409195 and dow jones industrial average djia falling 011 to 3364650 the stocks fall snapped a threeday winning streak capital one financial corp closed 4904 short of its 52week high 14473 which the company reached on april 21st the stock underperformed when compared to some of its competitors wednesday as jpmorgan