shares of norfolk southern corp nsc dropped 059 to 22639 tuesday on what proved to be an allaround poor trading session for the stock market with the sp 500 index spx falling 201 to 382155 and dow jones industrial average djia falling 156 to 3094699 this was the stocks second consecutive day of losses norfolk southern corp closed 7281 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 fell 023 to 21336 canadian national railway co cni fell 212 to 11101 and csx corp csx fell 061 to 2914 trading volume 944994 remained 392573 below its 50day average volume of 13 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