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Contract OI history

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Jan 15, 2027 EXPIRATION

BIRK $27.50 Put

BIRK270115P00027500

Latest saved OI470Oct 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 $27.50 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. 4862430 2026-10-02: 476 OI2026-10-05: 484 OI2026-10-06: 484 OI2026-10-07: 486 OI2026-10-08: 486 OI2026-10-09: 469 OI2026-10-13: 471 OI2026-10-14: 471 OI2026-10-15: 471 OI2026-10-16: 466 OI2026-10-20: 470 OI2026-10-23: 470 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, 2026Viewing4700
Oct 20, 2026470+4
Oct 16, 2026466-5
Oct 15, 20264710
Oct 14, 20264710
Oct 13, 2026471+2
Oct 09, 2026469-17
Oct 08, 20264860
Oct 07, 2026486+2
Oct 06, 20264840
Oct 05, 2026484+8
Oct 02, 2026476No prior observation