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Contract OI history

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Dec 18, 2026 EXPIRATION

BIIB $185.00 Put

BIIB261218P00185000

Latest saved OI70Oct 23, 2026
Last change0vs previous saved observation
Saved market days7Oct 09, 2026 onwards
Daily open interest Hover a point for its date and OI
BIIB $185.00 put open interest history 7 saved observations from 2026-10-09 to 2026-10-23. Exact values and changes are listed in the table below. 75370 2026-10-09: 75 OI2026-10-13: 75 OI2026-10-14: 70 OI2026-10-15: 70 OI2026-10-16: 70 OI2026-10-21: 70 OI2026-10-23: 70 OI Oct 09, 2026Oct 23, 2026

All saved dates are shown. Changes compare consecutive saved observations. Missing observations are not filled with zero.

BIIB contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 2026Viewing700
Oct 21, 2026700
Oct 16, 2026700
Oct 15, 2026700
Oct 14, 202670-5
Oct 13, 2026750
Oct 09, 202675No prior observation