OITracker Cboe delayed data

Contract OI history

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Dec 18, 2026 EXPIRATION

SM $40.00 Put

SM261218P00040000

Latest saved OI138Oct 23, 2026
Last change-1vs 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. 139690 2026-10-02: 88 OI2026-10-05: 88 OI2026-10-07: 88 OI2026-10-08: 88 OI2026-10-09: 88 OI2026-10-13: 137 OI2026-10-15: 137 OI2026-10-16: 137 OI2026-10-21: 139 OI2026-10-23: 138 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, 2026138-1
Oct 21, 2026Viewing139+2
Oct 16, 20261370
Oct 15, 20261370
Oct 13, 2026137+49
Oct 09, 2026880
Oct 08, 2026880
Oct 07, 2026880
Oct 05, 2026880
Oct 02, 202688No prior observation