shares of laboratory corp of america holdings lh advanced 181 to 21243 monday on what proved to be an allaround positive trading session for the stock market with the sp 500 index spx rising 265 to 367795 and the dow jones industrial average djia rising 186 to 3018582 laboratory corp of america holdings closed 10474 short of its 52week high 31717 which the company achieved on december 31st the stock demonstrated a mixed performance when compared to some of its competitors monday as idexx laboratories inc idxx rose 457 to 33949 quest diagnostics inc dgx rose 144 to 12793 and qiagen nv qgen rose 227 to 4463 trading volume 543770 remained 29139 below its 50day average volume of 572909 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