OITracker Cboe delayed data

Contract OI history

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Nov 20, 2026 EXPIRATION

SM $40.00 Put

SM261120P00040000

Latest saved OI268Oct 23, 2026
Last change0vs previous saved observation
Saved market days10Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
SM $40.00 put open interest history 10 saved observations from 2026-10-02 to 2026-10-23. Exact values and changes are listed in the table below. 2681340 2026-10-02: 241 OI2026-10-05: 241 OI2026-10-07: 241 OI2026-10-08: 241 OI2026-10-09: 241 OI2026-10-13: 241 OI2026-10-15: 241 OI2026-10-16: 241 OI2026-10-21: 268 OI2026-10-23: 268 OI Oct 02, 2026Oct 23, 2026

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

SM contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 20262680
Oct 21, 2026Viewing268+27
Oct 16, 20262410
Oct 15, 20262410
Oct 13, 20262410
Oct 09, 20262410
Oct 08, 20262410
Oct 07, 20262410
Oct 05, 20262410
Oct 02, 2026241No prior observation