shares of cooper cos coo shed 160 to 32697 tuesday on what proved to be an allaround grim 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 cooper cos closed 10370 below its 52week high 43067 which the company achieved on march 4th the stock underperformed when compared to some of its competitors tuesday as johnson  johnson jnj fell 152 to 15326 trading volume 13 m eclipsed its 50day average