shares of quest diagnostics inc dgx dropped 026 to 13584 monday on what proved to be an allaround favorable trading session for the stock market with the sp 500 index spx rising 031 to 412143 and the dow jones industrial average djia rising 005 to 3291578 this was the stocks second consecutive day of losses quest diagnostics inc closed 3832 short of 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 069 to 24198 qiagen nv qgen rose 143 to 4625 and sonic healthcare ltd adr skhhy fell 216 to 2532 trading volume 510592 remained 585651 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