OITracker Cboe delayed data

Contract OI history

Back to SO

Nov 20, 2026 EXPIRATION

SO $91.00 Put

SO261120P00091000

Latest saved OI420Oct 23, 2026
Last change+417vs previous saved observation
Saved market days2Oct 21, 2026 onwards
Daily open interest Hover a point for its date and OI
SO $91.00 put open interest history 2 saved observations from 2026-10-21 to 2026-10-23. Exact values and changes are listed in the table below. 4202100 2026-10-21: 3 OI2026-10-23: 420 OI Oct 21, 2026Oct 23, 2026

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

SO contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 2026Viewing420+417
Oct 21, 20263No prior observation