Biogen Inc. (BIIB) Dips More Than Broader Markets: What You Should Know Posted byZacks Equity Research December 9, 2021 Leave a comment on Biogen Inc. (BIIB) Dips More Than Broader Markets: What You Should Know Biogen Inc. (BIIB) closed the most recent trading day at $232.43, moving -0.98% from the previous trading session.