OITracker Cboe delayed data

Contract OI history

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Dec 18, 2026 EXPIRATION

B $38.00 Put

B261218P00038000

Latest saved OI2,249Oct 23, 2026
Last change-7vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
B $38.00 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. 2,2561,1280 2026-10-02: 2,212 OI2026-10-05: 2,214 OI2026-10-06: 2,214 OI2026-10-07: 2,214 OI2026-10-08: 2,214 OI2026-10-09: 2,215 OI2026-10-13: 2,224 OI2026-10-14: 2,224 OI2026-10-15: 2,230 OI2026-10-16: 2,256 OI2026-10-21: 2,256 OI2026-10-23: 2,249 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, 2026Viewing2,249-7
Oct 21, 20262,2560
Oct 16, 20262,256+26
Oct 15, 20262,230+6
Oct 14, 20262,2240
Oct 13, 20262,224+9
Oct 09, 20262,215+1
Oct 08, 20262,2140
Oct 07, 20262,2140
Oct 06, 20262,2140
Oct 05, 20262,214+2
Oct 02, 20262,212No prior observation