OITracker Cboe delayed data

Contract OI history

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Jun 17, 2027 EXPIRATION

CLS $320.00 Put

CLS270617P00320000

Latest saved OI11Oct 23, 2026
Last change-9vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
CLS $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. 20100 2026-10-02: 20 OI2026-10-05: 20 OI2026-10-06: 20 OI2026-10-07: 20 OI2026-10-08: 20 OI2026-10-09: 20 OI2026-10-13: 20 OI2026-10-14: 20 OI2026-10-15: 20 OI2026-10-16: 20 OI2026-10-21: 20 OI2026-10-23: 11 OI Oct 02, 2026Oct 23, 2026

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

CLS contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 2026Viewing11-9
Oct 21, 2026200
Oct 16, 2026200
Oct 15, 2026200
Oct 14, 2026200
Oct 13, 2026200
Oct 09, 2026200
Oct 08, 2026200
Oct 07, 2026200
Oct 06, 2026200
Oct 05, 2026200
Oct 02, 202620No prior observation