shares of under armour inc cl a uaa slid 312 to 807 wednesday on what proved to be an allaround rough trading session for the stock market with the sp 500 index spx falling 070 to 389193 and dow jones industrial average djia falling 087 to 3187457 under armour inc cl a closed 1011 below its 52week high 1818 which the company achieved on march 29th the stock underperformed when compared to some of its competitors wednesday as nike inc cl b nke fell 070 to 11817 trading volume 91 m eclipsed