shares of norfolk southern corp nsc slid 012 to 22281 tuesday on what proved to be an allaround poor trading session for the stock market with the sp 500 index spx falling 038 to 373548 and dow jones industrial average djia falling 050 to 3036483 this was the stocks fifth consecutive day of losses norfolk southern corp closed 7639 short of its 52week high 29920 which the company achieved on december 31st the stock demonstrated a mixed performance when compared to some of its competitors tuesday as union pacific corp unp rose 020 to 20849 canadian national railway co cni rose 064 to 10845 and csx corp csx fell 041 to 2934 trading volume 12 m remained 159415 below its 50day average volume of 14 m 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