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Contract OI history

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Dec 18, 2026 EXPIRATION

BIRK $40.00 Call

BIRK261218C00040000

Latest saved OI19Oct 23, 2026
Last change+1vs previous saved observation
Saved market days4Oct 15, 2026 onwards
Daily open interest Hover a point for its date and OI
BIRK $40.00 call open interest history 4 saved observations from 2026-10-15 to 2026-10-23. Exact values and changes are listed in the table below. 1990 2026-10-15: 0 OI2026-10-16: 18 OI2026-10-20: 18 OI2026-10-23: 19 OI Oct 15, 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, 2026Viewing19+1
Oct 20, 2026180
Oct 16, 202618+18
Oct 15, 20260No prior observation