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Contract OI history

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Jan 21, 2028 EXPIRATION

BIRK $17.50 Call

BIRK280121C00017500

Latest saved OI1,270Oct 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 $17.50 call open interest history 12 saved observations from 2026-10-02 to 2026-10-23. Exact values and changes are listed in the table below. 1,2796390 2026-10-02: 1,279 OI2026-10-05: 1,279 OI2026-10-06: 1,279 OI2026-10-07: 1,279 OI2026-10-08: 1,279 OI2026-10-09: 1,279 OI2026-10-13: 1,279 OI2026-10-14: 1,279 OI2026-10-15: 1,279 OI2026-10-16: 1,270 OI2026-10-20: 1,270 OI2026-10-23: 1,270 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, 2026Viewing1,2700
Oct 20, 20261,2700
Oct 16, 20261,270-9
Oct 15, 20261,2790
Oct 14, 20261,2790
Oct 13, 20261,2790
Oct 09, 20261,2790
Oct 08, 20261,2790
Oct 07, 20261,2790
Oct 06, 20261,2790
Oct 05, 20261,2790
Oct 02, 20261,279No prior observation