OITracker Cboe delayed data

Contract OI history

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Dec 18, 2026 EXPIRATION

CE $40.00 Put

CE261218P00040000

Latest saved OI618Oct 23, 2026
Last change+18vs previous saved observation
Saved market days11Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
CE $40.00 put open interest history 11 saved observations from 2026-10-02 to 2026-10-23. Exact values and changes are listed in the table below. 6183090 2026-10-02: 566 OI2026-10-05: 600 OI2026-10-06: 600 OI2026-10-07: 600 OI2026-10-08: 600 OI2026-10-09: 600 OI2026-10-13: 600 OI2026-10-14: 600 OI2026-10-16: 600 OI2026-10-20: 600 OI2026-10-23: 618 OI Oct 02, 2026Oct 23, 2026

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

CE contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 2026Viewing618+18
Oct 20, 20266000
Oct 16, 20266000
Oct 14, 20266000
Oct 13, 20266000
Oct 09, 20266000
Oct 08, 20266000
Oct 07, 20266000
Oct 06, 20266000
Oct 05, 2026600+34
Oct 02, 2026566No prior observation