shares of ipg photonics corp ipgp slipped 097 to 13232 friday on what proved to be an allaround grim trading session for the stock market with the sp 500 index spx falling 029 to 439895 and dow jones industrial average djia falling 055 to 3373488 this was the stocks fourth consecutive day of losses ipg photonics corp closed 501 below its 52week high 13733 which the company reached on june 15th the stock underperformed when compared to some of its competitors friday as teradyne inc ter fell 066 to 10634 lumentum holdings inc lite rose 149 to 5440 and national instruments corp nati fell 092 to 5690 trading volume 119870 remained 129605 below its 50day average volume of 249475 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