shares of amgen inc amgn inched 051 higher to 23323 thursday on what proved to be an allaround mixed trading session for the stock market with the dow jones industrial average djia rising 047 to 3522518 and the sp 500 index spx falling 068 to 453487 amgen inc closed 6344 below its 52week high 29667 which the company achieved on november 8th the stock underperformed when compared to some of its competitors thursday as johnson  johnson jnj rose 607 to 16838 and pfizer inc pfe rose 091 to 3677 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