shares of ross stores inc rost shed 133 to 10230 wednesday on what proved to be an allaround dismal 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 ross stores inc closed 2015 short of its 52week high 12245 which the company achieved on january 6th the stock underperformed when compared to some of its competitors wednesday as amazoncom inc amzn rose 139 to 9620 target corp tgt rose 048