shares of norfolk southern corp nsc slid 120 to 23971 monday on what proved to be an allaround positive trading session for the stock market with the sp 500 index spx rising 114 to 413729 and the dow jones industrial average djia rising 111 to 3424593 norfolk southern corp closed 5184 short of its 52week high 29155 which the company achieved on march 31st the stock underperformed when compared to some of its competitors monday as union pacific corp unp rose 027 to 20605 trading volume 29 m eclipsed its 50day average volume of 12 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