shares of amgen inc amgn slid 016 to 23076 monday on what proved to be an allaround great trading session for the stock market with the sp 500 index spx rising 069 to 389989 and the dow jones industrial average djia rising 064 to 3101968 amgen inc closed 2769 short of its 52week high 25845 which the company achieved on april 11th the stock demonstrated a mixed performance when compared to some of its competitors monday as johnson  johnson jnj fell 079 to 16628 roche holding ag part cert rhhvf rose 003 to 32218 and pfizer inc pfe fell 128 to 4544 trading volume 20 m remained 675444 below its 50day average volume of 27 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