shares of davita inc dva rallied 331 to 7521 thursday on what proved to be an allaround great trading session for the stock market with the sp 500 index spx rising 175 to 384928 and the dow jones industrial average djia rising 105 to 3322080 davita inc closed 4960 short of its 52week high 12481 which the company achieved on april 20th the stock outperformed some of its competitors thursday as unitedhealth group inc unh rose 027 to 52988 and icon plc iclr rose 269 to 19847 trading volume 482510 remained 449790 below its 50day average volume of 932300 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