shares of zions bancorp na zion slipped 114 to 5393 monday on what proved to be an allaround grim trading session for the stock market with the sp 500 index spx falling 028 to 411863 and dow jones industrial average djia falling 014 to 3279840 zions bancorp na closed 2151 below its 52week high 7544 which the company achieved on february 10th the stock underperformed when compared to some of its competitors monday as us bancorp usb rose 066 to 4751 and western alliance bancorp wal fell 034 to 7612 trading volume 12 m remained 214962 below its 50day average volume of 14 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