shares of biogen inc biib sank 068 to 19469 tuesday on what proved to be an allaround dismal trading session for the stock market with the sp 500 index spx falling 041 to 390819 and dow jones industrial average djia falling 055 to 3114530 this was the stocks second consecutive day of losses biogen inc closed 13818 below its 52week high 33287 which the company reached on september 7th the stock underperformed when compared to some of its competitors tuesday as johnson  johnson jnj rose 027 to 16318 pfizer inc pfe rose 013 to 4576 and abbvie inc abbv rose 096 to 13759 trading volume 765574 remained 146727 below its 50day average volume of 912301 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