Biogen's 15-minute chart shows Bollinger Bands expanding downward, bearish marubozu.

Biogen's 15-minute chart indicates a bearish trend, as the Bollinger Bands are expanding downward and the recent price action has been characterized by a bearish Marubozu at 03/27/2026 10:30. This suggests that sellers are driving the market and bearish momentum is likely to persist.