shares of biogen inc biib slid 216 to 26445 wednesday on what proved to be an allaround poor trading session for the stock market with the sp 500 index spx falling 067 to 369516 and dow jones industrial average djia falling 033 to 3042381 the stocks fall snapped a twoday winning streak biogen inc closed 2014 short of its 52week high 28459 which the company achieved on november 5th the stock demonstrated a mixed performance when compared to some of its competitors wednesday as johnson  johnson jnj fell 080 to 16469 pfizer inc pfe fell 222 to 4311 and abbvie inc abbv fell 102 to 14313 trading volume 12 m remained 375531 below its 50day average volume of 15 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