shares of zions bancorp na zion slid 199 to 5762 friday on what proved to be an allaround grim trading session for the stock market with the sp 500 index spx falling 129 to 422848 and dow jones industrial average djia falling 086 to 3370674 zions bancorp na closed 1782 below its 52week high 7544 which the company achieved on february 10th the stock demonstrated a mixed performance when compared to some of its competitors friday as us bancorp usb fell 082 to 4861 and western alliance bancorp wal fell 336 to 8292 trading volume 706970 remained 685048 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