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Contract OI history

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Mar 19, 2027 EXPIRATION

BIIB $220.00 Put

BIIB270319P00220000

Latest saved OI227Oct 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 $220.00 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. 2271130 2026-10-09: 15 OI2026-10-13: 15 OI2026-10-14: 15 OI2026-10-15: 15 OI2026-10-16: 15 OI2026-10-21: 227 OI2026-10-23: 227 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, 2026Viewing2270
Oct 21, 2026227+212
Oct 16, 2026150
Oct 15, 2026150
Oct 14, 2026150
Oct 13, 2026150
Oct 09, 202615No prior observation