shares of quest diagnostics inc dgx rallied 148 to 15145 monday on what proved to be an allaround poor trading session for the stock market with the sp 500 index spx falling 090 to 381766 and dow jones industrial average djia falling 049 to 3275754 this was the stocks second consecutive day of gains quest diagnostics inc closed 2271 short of its 52week high 17416 which the company reached on december 31st the stock outperformed some of its competitors monday as unitedhealth group inc unh fell 002 to 52360 iqvia holdings inc iqv fell 193 to 19984 and centene corp cnc rose 002 to 8142 trading volume 12 m eclipsed its 50day average volume of 12 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