OITracker Cboe delayed data

Contract OI history

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May 21, 2027 EXPIRATION

SM $27.50 Put

SM270521P00027500

Latest saved OI22Oct 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 $27.50 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. 22110 2026-10-02: 19 OI2026-10-05: 19 OI2026-10-07: 21 OI2026-10-08: 21 OI2026-10-09: 22 OI2026-10-13: 22 OI2026-10-15: 22 OI2026-10-16: 22 OI2026-10-21: 21 OI2026-10-23: 22 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, 2026Viewing22+1
Oct 21, 202621-1
Oct 16, 2026220
Oct 15, 2026220
Oct 13, 2026220
Oct 09, 202622+1
Oct 08, 2026210
Oct 07, 202621+2
Oct 05, 2026190
Oct 02, 202619No prior observation