shares of quest diagnostics inc dgx slipped 056 to 12707 tuesday on what proved to be an allaround rough trading session for the stock market with the sp 500 index spx falling 038 to 373548 and dow jones industrial average djia falling 050 to 3036483 this was the stocks fifth consecutive day of losses quest diagnostics inc closed 4709 below its 52week high 17416 which the company reached on december 31st the stock demonstrated a mixed performance when compared to some of its competitors tuesday as laboratory corp of america holdings lh fell 121 to 21386 qiagen nv qgen fell 210 to 4298 and sonic healthcare ltd adr skhhy rose 022 to 2282 trading volume 858179 remained 204703 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