OITracker Cboe delayed data

Contract OI history

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Jan 15, 2027 EXPIRATION

STM $40.00 Put

STM270115P00040000

Latest saved OI1,578Oct 23, 2026
Last change+851vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
STM $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. 1,5787890 2026-10-02: 725 OI2026-10-05: 716 OI2026-10-06: 713 OI2026-10-07: 721 OI2026-10-08: 721 OI2026-10-09: 723 OI2026-10-13: 723 OI2026-10-14: 723 OI2026-10-15: 720 OI2026-10-16: 718 OI2026-10-21: 727 OI2026-10-23: 1,578 OI Oct 02, 2026Oct 23, 2026

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

STM contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 2026Viewing1,578+851
Oct 21, 2026727+9
Oct 16, 2026718-2
Oct 15, 2026720-3
Oct 14, 20267230
Oct 13, 20267230
Oct 09, 2026723+2
Oct 08, 20267210
Oct 07, 2026721+8
Oct 06, 2026713-3
Oct 05, 2026716-9
Oct 02, 2026725No prior observation