shares of gilead sciences inc gild slid 073 to 8008 tuesday on what proved to be an allaround grim trading session for the stock market with the sp 500 index spx falling 042 to 449938 and dow jones industrial average djia falling 045 to 3531449 gilead sciences inc closed 966 short of its 52week high 8974 which the company reached on december 13th the stock demonstrated a mixed performance when compared to some of its competitors tuesday as johnson  johnson jnj rose 005 to 17318 pfizer inc pfe fell 011 to 3564 and abbott laboratories abt fell 265 to 10558 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