OITracker Cboe delayed data

Contract OI history

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Jun 17, 2027 EXPIRATION

CB $320.00 Put

CB270617P00320000

Latest saved OI151Oct 23, 2026
Last change0vs 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. 151750 2026-10-02: 49 OI2026-10-05: 49 OI2026-10-06: 49 OI2026-10-07: 49 OI2026-10-08: 49 OI2026-10-09: 49 OI2026-10-13: 150 OI2026-10-14: 150 OI2026-10-15: 150 OI2026-10-16: 151 OI2026-10-21: 151 OI2026-10-23: 151 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, 2026Viewing1510
Oct 21, 20261510
Oct 16, 2026151+1
Oct 15, 20261500
Oct 14, 20261500
Oct 13, 2026150+101
Oct 09, 2026490
Oct 08, 2026490
Oct 07, 2026490
Oct 06, 2026490
Oct 05, 2026490
Oct 02, 202649No prior observation