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Contract OI history

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Dec 18, 2026 EXPIRATION

BLSH $40.00 Put

BLSH261218P00040000

Latest saved OI636Oct 23, 2026
Last change-1vs previous saved observation
Saved market days11Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
BLSH $40.00 put open interest history 11 saved observations from 2026-10-02 to 2026-10-23. Exact values and changes are listed in the table below. 6423210 2026-10-02: 642 OI2026-10-05: 642 OI2026-10-06: 642 OI2026-10-07: 642 OI2026-10-08: 642 OI2026-10-09: 642 OI2026-10-13: 642 OI2026-10-14: 642 OI2026-10-16: 642 OI2026-10-20: 637 OI2026-10-23: 636 OI Oct 02, 2026Oct 23, 2026

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

BLSH contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 2026Viewing636-1
Oct 20, 2026637-5
Oct 16, 20266420
Oct 14, 20266420
Oct 13, 20266420
Oct 09, 20266420
Oct 08, 20266420
Oct 07, 20266420
Oct 06, 20266420
Oct 05, 20266420
Oct 02, 2026642No prior observation