OITracker Cboe delayed data

Contract OI history

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Jan 21, 2028 EXPIRATION

BLSH $50.00 Put

BLSH280121P00050000

Latest saved OI119Oct 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 $50.00 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. 119590 2026-10-02: 119 OI2026-10-05: 119 OI2026-10-06: 119 OI2026-10-07: 119 OI2026-10-08: 119 OI2026-10-09: 119 OI2026-10-13: 119 OI2026-10-14: 119 OI2026-10-16: 119 OI2026-10-20: 119 OI2026-10-23: 119 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, 2026Viewing1190
Oct 20, 20261190
Oct 16, 20261190
Oct 14, 20261190
Oct 13, 20261190
Oct 09, 20261190
Oct 08, 20261190
Oct 07, 20261190
Oct 06, 20261190
Oct 05, 20261190
Oct 02, 2026119No prior observation