OITracker Cboe delayed data

Contract OI history

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May 21, 2027 EXPIRATION

BXSL $20.00 Put

BXSL270521P00020000

Latest saved OI150Oct 23, 2026
Last change+120vs previous saved observation
Saved market days10Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
BXSL $20.00 put open interest history 10 saved observations from 2026-10-02 to 2026-10-23. Exact values and changes are listed in the table below. 150750 2026-10-02: 30 OI2026-10-05: 30 OI2026-10-06: 30 OI2026-10-07: 30 OI2026-10-08: 30 OI2026-10-13: 30 OI2026-10-14: 30 OI2026-10-16: 30 OI2026-10-20: 30 OI2026-10-23: 150 OI Oct 02, 2026Oct 23, 2026

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

BXSL contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 2026Viewing150+120
Oct 20, 2026300
Oct 16, 2026300
Oct 14, 2026300
Oct 13, 2026300
Oct 08, 2026300
Oct 07, 2026300
Oct 06, 2026300
Oct 05, 2026300
Oct 02, 202630No prior observation