shares of norfolk southern corp nsc slid 130 to 23359 monday on what proved to be an allaround positive trading session for the stock market with the sp 500 index spx rising 015 to 458896 and the dow jones industrial average djia rising 028 to 3555953 norfolk southern corp closed 3063 short of its 52week high 26422 which the company reached on august 26th the stock underperformed when compared to some of its competitors monday as union pacific corp unp fell 032 to 23202 trading volume 11 m remained 98152 below 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