shares of biogen inc biib advanced 281 to 20673 wednesday on what proved to be an allaround dismal trading session for the stock market with the sp 500 index spx falling 108 to 411577 and dow jones industrial average djia falling 081 to 3291090 this was the stocks second consecutive day of gains biogen inc closed 22077 below its 52week high 42750 which the company achieved on june 11th the stock outperformed some of its competitors wednesday as johnson  johnson jnj fell 059 to 17728 pfizer inc pfe fell 091 to 5347 and abbvie inc abbv rose 007 to 14925 trading volume 16 m eclipsed its 50day average volume of 11 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