OITracker Cboe delayed data

Contract OI history

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Jan 21, 2028 EXPIRATION

BLSH $15.00 Put

BLSH280121P00015000

Latest saved OI110Oct 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 $15.00 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. 111550 2026-10-02: 111 OI2026-10-05: 111 OI2026-10-06: 111 OI2026-10-07: 111 OI2026-10-08: 111 OI2026-10-09: 111 OI2026-10-13: 111 OI2026-10-14: 111 OI2026-10-16: 111 OI2026-10-20: 111 OI2026-10-23: 110 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, 2026Viewing110-1
Oct 20, 20261110
Oct 16, 20261110
Oct 14, 20261110
Oct 13, 20261110
Oct 09, 20261110
Oct 08, 20261110
Oct 07, 20261110
Oct 06, 20261110
Oct 05, 20261110
Oct 02, 2026111No prior observation