BIIB Short Interest

Short InterestModerate
Short Interest?5.5M
Days to Cover?4.0
Avg Daily Volume1.4M
Settlement Date2026-10-30
Short Volume Ratio (30 Day)Avg: 5,973.4%
2026-10-012026-10-222026-11-11
Latest Short Vol Ratio5,369.0%
Short Volume233.6K
Total Volume435.0K
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Biogen (BIIB) — Short Interest