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Contract OI history

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Oct 30, 2026 EXPIRATION

BIIB $210.00 Put

BIIB261030P00210000

Latest saved OI185Oct 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 $210.00 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. 185920 2026-10-09: 1 OI2026-10-13: 23 OI2026-10-14: 23 OI2026-10-15: 24 OI2026-10-16: 24 OI2026-10-21: 185 OI2026-10-23: 185 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, 2026Viewing1850
Oct 21, 2026185+161
Oct 16, 2026240
Oct 15, 202624+1
Oct 14, 2026230
Oct 13, 202623+22
Oct 09, 20261No prior observation