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Contract OI history

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Nov 20, 2026 EXPIRATION

BIIB $200.00 Put

BIIB261120P00200000

Latest saved OI532Oct 23, 2026
Last change+497vs previous saved observation
Saved market days7Oct 09, 2026 onwards
Daily open interest Hover a point for its date and OI
BIIB $200.00 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. 5322660 2026-10-09: 34 OI2026-10-13: 34 OI2026-10-14: 34 OI2026-10-15: 34 OI2026-10-16: 35 OI2026-10-21: 35 OI2026-10-23: 532 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, 2026Viewing532+497
Oct 21, 2026350
Oct 16, 202635+1
Oct 15, 2026340
Oct 14, 2026340
Oct 13, 2026340
Oct 09, 202634No prior observation