shares of union pacific corp unp shed 063 to 27361 tuesday on what proved to be an allaround favorable trading session for the stock market with the sp 500 index spx rising 123 to 463160 and the dow jones industrial average djia rising 097 to 3529419 the stocks fall snapped a sixday winning streak union pacific corp closed 179 short of its 52week high 27540 which the company achieved on march 28th the stock underperformed when compared to some of its competitors tuesday as canadian national railway co cni rose 025 to 13606 csx corp csx rose 040 to 3768 and norfolk southern corp nsc rose 037 to 28566 trading volume 28 m remained 10 million below its 50day average volume of 38 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