shares of wabtec wab sank 078 to 11475 tuesday on what proved to be an allaround poor trading session for the stock market with the sp 500 index spx falling 042 to 449938 and dow jones industrial average djia falling 045 to 3531449 wabtec closed 495 below its 52week high 11970 which the company achieved on august 1st trading volume 712858 remained 356937 below its 50day average volume of 11 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