shares of davita inc dva sank 090 to 12100 friday on what proved to be an allaround favorable trading session for the stock market with the sp 500 index spx rising 015 to 445548 and the dow jones industrial average djia rising 010 to 3479800 the stocks fall snapped a twoday winning streak davita inc closed 1548 short of its 52week high 13648 which the company reached on august 4th the stock underperformed when compared to some of its competitors friday as fresenius medical care ag  co kgaa adr fms remained unchanged laboratory corp of america holdings lh fell 012 to 29637 and universal health services inc cl b uhs rose 024 to 14476 trading volume 584970 remained 12002 below its 50day average volume of 596972 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