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Contract OI history

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Jan 15, 2027 EXPIRATION

BIIB $230.00 Put

BIIB270115P00230000

Latest saved OI33Oct 23, 2026
Last change+10vs previous saved observation
Saved market days7Oct 09, 2026 onwards
Daily open interest Hover a point for its date and OI
BIIB $230.00 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. 33160 2026-10-09: 11 OI2026-10-13: 14 OI2026-10-14: 15 OI2026-10-15: 15 OI2026-10-16: 23 OI2026-10-21: 23 OI2026-10-23: 33 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, 2026Viewing33+10
Oct 21, 2026230
Oct 16, 202623+8
Oct 15, 2026150
Oct 14, 202615+1
Oct 13, 202614+3
Oct 09, 202611No prior observation