shares of gilead sciences inc gild slid 029 to 6266 monday on what proved to be an allaround poor trading session for the stock market with the sp 500 index spx falling 115 to 385443 and dow jones industrial average djia falling 052 to 3117384 gilead sciences inc closed 1146 short of 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 rose 004 to 17835 merck  co inc mrk rose 164 to 9430 and abbvie inc abbv rose 025 to 15323 trading volume 35 m remained 45 million below its 50day average volume of 79 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