shares of gilead sciences inc gild slumped 040 to 6283 monday on what proved to be an allaround poor trading session for the stock market with the sp 500 index spx falling 030 to 390011 and dow jones industrial average djia falling 020 to 3143826 the stocks fall snapped a fiveday winning streak gilead sciences inc closed 1129 below its 52week high 7412 which the company achieved on december 30th the stock underperformed when compared to some of its competitors monday as johnson  johnson jnj fell 009 to 18212 merck  co inc mrk rose 137 to 9441 and abbvie inc abbv rose 053 to 15314 trading volume 65 m remained 18 million below its 50day average volume of 82 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