BIIB Short Interest

Short InterestHigh
Short Interest?5.7M
Days to Cover?8.7
Avg Daily Volume661.6K
Settlement Date2026-08-31
Short Volume Ratio (30 Day)Avg: 5,798.3%
2026-07-312026-08-212026-09-11
Latest Short Vol Ratio6,143.0%
Short Volume288.6K
Total Volume469.8K
Biogen (BIIB) โ€” Short Interest