shares of parker hannifin corp ph slid 138 to 28405 friday on what proved to be an allaround poor trading session for the stock market with the sp 500 index spx falling 077 to 445858 and dow jones industrial average djia falling 078 to 3460772 parker hannifin corp closed 4063 below its 52week high 32468 which the company achieved on may 10th the stock underperformed when compared to some of its competitors friday as danaher corp dhr rose 049 to 32999 rockwell automation inc rok fell 030 to 31409 and dover corp dov fell 073 to 17356 trading volume 799741 remained 110434 below its 50day average volume of 910175 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