shares of quest diagnostics inc dgx inched 069 higher to 12320 monday on what proved to be an allaround dismal trading session for the stock market with the sp 500 index spx falling 103 to 365504 and dow jones industrial average djia falling 111 to 2926081 quest diagnostics inc closed 5096 below its 52week high 17416 which the company achieved on december 31st the stock demonstrated a mixed performance when compared to some of its competitors monday as laboratory corp of america holdings lh fell 058 to 21043 qiagen nv qgen fell 087 to 4096 and sonic healthcare ltd adr skhhy rose 107 to 1945 trading volume 978454 eclipsed its 50day average volume of 855348 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