shares of ao smith corp aos slumped 083 to 5888 wednesday on what proved to be an allaround rough trading session for the stock market with the sp 500 index spx falling 061 to 399532 and dow jones industrial average djia falling 042 to 3396635 the stocks fall snapped a twoday winning streak ao smith corp closed 2786 below its 52week high 8674 which the company reached on december 30th