shares of gilead sciences inc gild slid 188 to 5885 wednesday on what proved to be an allaround grim trading session for the stock market with the sp 500 index spx falling 123 to 445624 and dow jones industrial average djia falling 129 to 3435850 the stocks fall snapped a fourday winning streak gilead sciences inc closed 1527 short of its 52week high 7412 which the company reached on december 30th the stock underperformed when compared to some of its competitors wednesday as johnson  johnson jnj fell 038 to 17434 merck  co inc mrk rose 054 to 7973 and abbvie inc abbv fell 099 to 15842 trading volume 91 m remained 30 million below its 50day average volume of 121 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