shares of mt bank corp mtb tumbled 1389 to 16306 wednesday on what proved to be an allaround poor trading session for the stock market with the sp 500 index spx falling 067 to 369516 and dow jones industrial average djia falling 033 to 3042381 the stocks fall snapped a twoday winning streak mt bank corp closed 3036 below its 52week high 19342 which the company reached on august 16th the stock underperformed when compared to some of its competitors wednesday as bank of america corp bac fell 275 to 3392 wells fargo  co wfc fell 235 to 4362 and pnc financial services group inc pnc fell 286 to 15170 trading volume 59 m eclipsed its 50day average volume of 923881 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