shares of biogen inc biib slid 157 to 27477 tuesday on what proved to be an allaround mixed trading session for the stock market with the dow jones industrial average djia rising 011 to 3324156 and the sp 500 index spx falling 040 to 382925 this was the stocks fourth consecutive day of losses biogen inc closed 3711 below its 52week high 31188 which the company achieved on november 30th the stock underperformed when compared to some of its competitors tuesday as johnson  johnson jnj fell 003 to 17743 and pfizer inc pfe fell 135 to 5113 trading volume 638546 remained 709822 below its 50day average volume of 13 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