OITracker Cboe delayed data

Contract OI history

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Jan 15, 2027 EXPIRATION

BLSH $20.00 Put

BLSH270115P00020000

Latest saved OI54Oct 23, 2026
Last change0vs previous saved observation
Saved market days11Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
BLSH $20.00 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. 54270 2026-10-02: 51 OI2026-10-05: 51 OI2026-10-06: 51 OI2026-10-07: 51 OI2026-10-08: 51 OI2026-10-09: 51 OI2026-10-13: 51 OI2026-10-14: 51 OI2026-10-16: 51 OI2026-10-20: 54 OI2026-10-23: 54 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, 2026Viewing540
Oct 20, 202654+3
Oct 16, 2026510
Oct 14, 2026510
Oct 13, 2026510
Oct 09, 2026510
Oct 08, 2026510
Oct 07, 2026510
Oct 06, 2026510
Oct 05, 2026510
Oct 02, 202651No prior observation