shares of davita inc dva slid 166 to 8096 thursday on what proved to be an allaround favorable trading session for the stock market with the sp 500 index spx rising 076 to 398135 and the dow jones industrial average djia rising 105 to 3300357 davita inc closed 4385 below its 52week high 12481 which the company achieved on april 20th the stock underperformed when compared to some of its competitors thursday as unitedhealth group inc unh rose 052 to 47770 and icon plc iclr rose 131 to 23047 trading volume 580198 remained 101516 below its 50day average volume of 681714 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