shares of biogen inc biib slumped 019 to 27840 monday on what proved to be an allaround great trading session for the stock market with the sp 500 index spx rising 039 to 452279 and the dow jones industrial average djia rising 022 to 3458535 biogen inc closed 4136 below its 52week high 31976 which the company achieved on june 12th despite its losses the stock outperformed some of its competitors monday as johnson  johnson jnj fell 050 to 15907 and pfizer inc pfe fell 127 to 3586 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