OITracker Cboe delayed data

Contract OI history

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Dec 18, 2026 EXPIRATION

BL $27.50 Put

BL261218P00027500

Latest saved OI246Oct 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 $27.50 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. 2461230 2026-10-09: 246 OI2026-10-13: 246 OI2026-10-14: 246 OI2026-10-16: 246 OI2026-10-20: 246 OI2026-10-23: 246 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, 2026Viewing2460
Oct 20, 20262460
Oct 16, 20262460
Oct 14, 20262460
Oct 13, 20262460
Oct 09, 2026246No prior observation