OITracker Cboe delayed data

Contract OI history

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Jan 15, 2027 EXPIRATION

STM $20.00 Put

STM270115P00020000

Latest saved OI2,033Oct 23, 2026
Last change0vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
STM $20.00 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. 2,0531,0260 2026-10-02: 2,053 OI2026-10-05: 2,053 OI2026-10-06: 2,053 OI2026-10-07: 2,053 OI2026-10-08: 2,053 OI2026-10-09: 2,053 OI2026-10-13: 2,033 OI2026-10-14: 2,033 OI2026-10-15: 2,033 OI2026-10-16: 2,033 OI2026-10-21: 2,033 OI2026-10-23: 2,033 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, 2026Viewing2,0330
Oct 21, 20262,0330
Oct 16, 20262,0330
Oct 15, 20262,0330
Oct 14, 20262,0330
Oct 13, 20262,033-20
Oct 09, 20262,0530
Oct 08, 20262,0530
Oct 07, 20262,0530
Oct 06, 20262,0530
Oct 05, 20262,0530
Oct 02, 20262,053No prior observation