shares of gilead sciences inc gild slid 262 to 5915 monday on what proved to be an allaround dismal trading session for the stock market with the sp 500 index spx falling 388 to 374963 and dow jones industrial average djia falling 279 to 3051674 this was the stocks fourth consecutive day of losses gilead sciences inc closed 1497 below its 52week high 7412 which the company achieved on december 30th the stock demonstrated a mixed performance when compared to some of its competitors monday as johnson  johnson jnj fell 101 to 17081 merck  co inc mrk fell 250 to 8500 and abbvie inc abbv fell 264 to 13942 trading volume 96 m eclipsed its 50day average volume of 81 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