OITracker Cboe delayed data

Contract OI history

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Dec 18, 2026 EXPIRATION

B $43.00 Put

B261218P00043000

Latest saved OI215Oct 23, 2026
Last change0vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
B $43.00 put open interest history 12 saved observations from 2026-10-02 to 2026-10-23. Exact values and changes are listed in the table below. 2181090 2026-10-02: 215 OI2026-10-05: 216 OI2026-10-06: 216 OI2026-10-07: 216 OI2026-10-08: 216 OI2026-10-09: 215 OI2026-10-13: 218 OI2026-10-14: 218 OI2026-10-15: 218 OI2026-10-16: 218 OI2026-10-21: 215 OI2026-10-23: 215 OI Oct 02, 2026Oct 23, 2026

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

B contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 2026Viewing2150
Oct 21, 2026215-3
Oct 16, 20262180
Oct 15, 20262180
Oct 14, 20262180
Oct 13, 2026218+3
Oct 09, 2026215-1
Oct 08, 20262160
Oct 07, 20262160
Oct 06, 20262160
Oct 05, 2026216+1
Oct 02, 2026215No prior observation