shares of rockwell automation inc rok shed 356 to 21444 thursday on what proved to be an allaround grim trading session for the stock market with the sp 500 index spx falling 356 to 414687 and dow jones industrial average djia falling 312 to 3299797 rockwell automation inc closed 14055 short of its 52week high 35499 which the company reached on december 16th the stock underperformed when compared to some of its competitors thursday as emerson electric co emr fell 231 to 8923 and abb ltd adr abb fell 318 to 2956 trading volume 13 m eclipsed its 50day average volume of 797663 editors note this story was autogenerated by automated insights an automation technology provider using data from dow jones and factset see our market data terms of use