shares of zions bancorp na zion shed 178 to 4797 wednesday on what proved to be an allaround poor trading session for the stock market with the sp 500 index spx falling 120 to 378322 and dow jones industrial average djia falling 110 to 3287571 the stocks fall snapped a fiveday winning streak zions bancorp na closed 2747 below its 52week high 7544 which the company reached on february 10th the stock underperformed when compared to some of its competitors wednesday as wells fargo  co wfc rose 019 to 4112 us bancorp usb fell 069 to 4335 and citizens financial group inc cfg fell 061 to 3897 trading volume 679957 remained 856654 below its 50day average volume of 15 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