OITracker Cboe delayed data

Contract OI history

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Dec 18, 2026 EXPIRATION

SM $37.50 Put

SM261218P00037500

Latest saved OI364Oct 23, 2026
Last change+8vs previous saved observation
Saved market days10Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
SM $37.50 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. 3641820 2026-10-02: 328 OI2026-10-05: 328 OI2026-10-07: 329 OI2026-10-08: 329 OI2026-10-09: 331 OI2026-10-13: 338 OI2026-10-15: 339 OI2026-10-16: 341 OI2026-10-21: 356 OI2026-10-23: 364 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, 2026364+8
Oct 21, 2026Viewing356+15
Oct 16, 2026341+2
Oct 15, 2026339+1
Oct 13, 2026338+7
Oct 09, 2026331+2
Oct 08, 20263290
Oct 07, 2026329+1
Oct 05, 20263280
Oct 02, 2026328No prior observation