OITracker Cboe delayed data

Contract OI history

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Mar 19, 2027 EXPIRATION

BL $22.50 Put

BL270319P00022500

Latest saved OI411Oct 23, 2026
Last change0vs previous saved observation
Saved market days6Oct 09, 2026 onwards
Daily open interest Hover a point for its date and OI
BL $22.50 put open interest history 6 saved observations from 2026-10-09 to 2026-10-23. Exact values and changes are listed in the table below. 4112050 2026-10-09: 411 OI2026-10-13: 411 OI2026-10-14: 411 OI2026-10-16: 411 OI2026-10-20: 411 OI2026-10-23: 411 OI Oct 09, 2026Oct 23, 2026

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

BL contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 2026Viewing4110
Oct 20, 20264110
Oct 16, 20264110
Oct 14, 20264110
Oct 13, 20264110
Oct 09, 2026411No prior observation