shares of norfolk southern corp nsc sank 097 to 20304 wednesday on what proved to be an allaround mixed trading session for the stock market with the dow jones industrial average djia rising 024 to 3348272 and the sp 500 index spx falling 025 to 409038 this was the stocks third consecutive day of losses norfolk southern corp closed 7361 short of its 52week high 27665 which the company reached on april 21st the stock underperformed when compared to some of its competitors wednesday as union pacific corp unp fell 085 to 19421 trading volume 23 m eclipsed its 50day average volume of 18 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