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Contract OI history

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Jan 15, 2027 EXPIRATION

BIRK $22.50 Put

BIRK270115P00022500

Latest saved OI492Oct 23, 2026
Last change0vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
BIRK $22.50 put open interest history 12 saved observations from 2026-10-02 to 2026-10-23. Exact values and changes are listed in the table below. 5182590 2026-10-02: 518 OI2026-10-05: 517 OI2026-10-06: 517 OI2026-10-07: 517 OI2026-10-08: 517 OI2026-10-09: 516 OI2026-10-13: 515 OI2026-10-14: 515 OI2026-10-15: 515 OI2026-10-16: 492 OI2026-10-20: 492 OI2026-10-23: 492 OI Oct 02, 2026Oct 23, 2026

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

BIRK contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 2026Viewing4920
Oct 20, 20264920
Oct 16, 2026492-23
Oct 15, 20265150
Oct 14, 20265150
Oct 13, 2026515-1
Oct 09, 2026516-1
Oct 08, 20265170
Oct 07, 20265170
Oct 06, 20265170
Oct 05, 2026517-1
Oct 02, 2026518No prior observation