OITracker Cboe delayed data

Contract OI history

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Mar 19, 2027 EXPIRATION

BLSH $40.00 Call

BLSH270319C00040000

Latest saved OI41Oct 23, 2026
Last change-5vs previous saved observation
Saved market days11Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
BLSH $40.00 call open interest history 11 saved observations from 2026-10-02 to 2026-10-23. Exact values and changes are listed in the table below. 49240 2026-10-02: 46 OI2026-10-05: 46 OI2026-10-06: 45 OI2026-10-07: 45 OI2026-10-08: 45 OI2026-10-09: 46 OI2026-10-13: 47 OI2026-10-14: 47 OI2026-10-16: 49 OI2026-10-20: 46 OI2026-10-23: 41 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, 2026Viewing41-5
Oct 20, 202646-3
Oct 16, 202649+2
Oct 14, 2026470
Oct 13, 202647+1
Oct 09, 202646+1
Oct 08, 2026450
Oct 07, 2026450
Oct 06, 202645-1
Oct 05, 2026460
Oct 02, 202646No prior observation