shares of quest diagnostics inc dgx slid 069 to 14210 tuesday on what proved to be an allaround mixed trading session for the stock market with the sp 500 index spx rising 009 to 415487 and the dow jones industrial average djia falling 003 to 3397663 quest diagnostics inc closed 1624 short of its 52week high 15834 which the company reached on december 29th the stock underperformed when compared to some of its competitors tuesday as unitedhealth group inc unh fell 017 to 50448 iqvia holdings inc iqv rose 005 to 20273 and centene corp cnc rose 033 to 6893 trading volume 496758 remained 643553 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