OITracker Cboe delayed data

Contract OI history

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Dec 18, 2026 EXPIRATION

W $40.00 Put

W261218P00040000

Latest saved OI746Oct 23, 2026
Last change0vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
W $40.00 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. 7463730 2026-10-02: 738 OI2026-10-05: 738 OI2026-10-06: 738 OI2026-10-07: 738 OI2026-10-08: 740 OI2026-10-09: 740 OI2026-10-13: 740 OI2026-10-14: 740 OI2026-10-15: 740 OI2026-10-16: 745 OI2026-10-21: 746 OI2026-10-23: 746 OI Oct 02, 2026Oct 23, 2026

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

W contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 2026Viewing7460
Oct 21, 2026746+1
Oct 16, 2026745+5
Oct 15, 20267400
Oct 14, 20267400
Oct 13, 20267400
Oct 09, 20267400
Oct 08, 2026740+2
Oct 07, 20267380
Oct 06, 20267380
Oct 05, 20267380
Oct 02, 2026738No prior observation