OITracker Cboe delayed data

Contract OI history

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Mar 19, 2027 EXPIRATION

BL $20.00 Put

BL270319P00020000

Latest saved OI2,159Oct 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 $20.00 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. 2,1591,0790 2026-10-09: 2,159 OI2026-10-13: 2,159 OI2026-10-14: 2,159 OI2026-10-16: 2,159 OI2026-10-20: 2,159 OI2026-10-23: 2,159 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, 2026Viewing2,1590
Oct 20, 20262,1590
Oct 16, 20262,1590
Oct 14, 20262,1590
Oct 13, 20262,1590
Oct 09, 20262,159No prior observation