shares of quest diagnostics inc dgx slipped 130 to 13717 thursday on what proved to be an allaround poor trading session for the stock market with the sp 500 index spx falling 110 to 448273 and dow jones industrial average djia falling 089 to 3471539 quest diagnostics inc closed 3699 short of its 52week high 17416 which the company achieved on december 31st the stock underperformed when compared to some of its competitors thursday as laboratory corp of america holdings lh fell 042 to 27087 qiagen nv qgen fell 044 to 4957 and sonic healthcare ltd adr skhhy rose 167 to 2918 trading volume 16 m eclipsed its 50day average volume of 12 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