BIIB Short Interest

Short InterestModerate
Short Interest?6.0M
Days to Cover?4.9
Avg Daily Volume1.2M
Settlement Date2026-09-30
Short Volume Ratio (30 Day)Avg: 6,179.6%
2026-09-112026-10-022026-10-22
Latest Short Vol Ratio7,468.0%
Short Volume769.2K
Total Volume1.0M
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Biogen (BIIB) — Short Interest