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Contract OI history

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Nov 20, 2026 EXPIRATION

BIRK $37.50 Call

BIRK261120C00037500

Latest saved OI919Oct 23, 2026
Last change+1vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
BIRK $37.50 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. 9194590 2026-10-02: 487 OI2026-10-05: 497 OI2026-10-06: 501 OI2026-10-07: 501 OI2026-10-08: 501 OI2026-10-09: 506 OI2026-10-13: 542 OI2026-10-14: 542 OI2026-10-15: 551 OI2026-10-16: 915 OI2026-10-20: 918 OI2026-10-23: 919 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, 2026Viewing919+1
Oct 20, 2026918+3
Oct 16, 2026915+364
Oct 15, 2026551+9
Oct 14, 20265420
Oct 13, 2026542+36
Oct 09, 2026506+5
Oct 08, 20265010
Oct 07, 20265010
Oct 06, 2026501+4
Oct 05, 2026497+10
Oct 02, 2026487No prior observation