shares of laboratory corp of america holdings lh rallied 117 to 25304 wednesday on what proved to be an allaround great trading session for the stock market with the sp 500 index spx rising 021 to 418396 and the dow jones industrial average djia rising 019 to 3330193 the stocks rise snapped a fourday losing streak laboratory corp of america holdings closed 6413 short of its 52week high 31717 which the company reached on december 31st the stock demonstrated a mixed performance when compared to some of its competitors wednesday as idexx laboratories inc idxx fell 184 to 44718 quest diagnostics inc dgx rose 204 to 13748 and qiagen nv qgen rose 087 to 4530 trading volume 17 m eclipsed its 50day average volume of 859140 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