OITracker Cboe delayed data

Contract OI history

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Nov 20, 2026 EXPIRATION

CB $320.00 Put

CB261120P00320000

Latest saved OI514Oct 23, 2026
Last change+369vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
CB $320.00 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. 5142570 2026-10-02: 104 OI2026-10-05: 111 OI2026-10-06: 109 OI2026-10-07: 133 OI2026-10-08: 134 OI2026-10-09: 136 OI2026-10-13: 149 OI2026-10-14: 149 OI2026-10-15: 148 OI2026-10-16: 136 OI2026-10-21: 145 OI2026-10-23: 514 OI Oct 02, 2026Oct 23, 2026

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

CB contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 2026Viewing514+369
Oct 21, 2026145+9
Oct 16, 2026136-12
Oct 15, 2026148-1
Oct 14, 20261490
Oct 13, 2026149+13
Oct 09, 2026136+2
Oct 08, 2026134+1
Oct 07, 2026133+24
Oct 06, 2026109-2
Oct 05, 2026111+7
Oct 02, 2026104No prior observation