OITracker Cboe delayed data

Contract OI history

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Oct 23, 2026 EXPIRATION

S $21.00 Put

S261023P00021000

Latest saved OI330Oct 23, 2026
Last change-5vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
S $21.00 put open interest history 12 saved observations from 2026-10-02 to 2026-10-23. Exact values and changes are listed in the table below. 3351670 2026-10-02: 319 OI2026-10-05: 319 OI2026-10-06: 319 OI2026-10-07: 319 OI2026-10-08: 319 OI2026-10-09: 319 OI2026-10-13: 319 OI2026-10-14: 319 OI2026-10-15: 319 OI2026-10-16: 324 OI2026-10-21: 335 OI2026-10-23: 330 OI Oct 02, 2026Oct 23, 2026

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

S contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 2026Viewing330-5
Oct 21, 2026335+11
Oct 16, 2026324+5
Oct 15, 20263190
Oct 14, 20263190
Oct 13, 20263190
Oct 09, 20263190
Oct 08, 20263190
Oct 07, 20263190
Oct 06, 20263190
Oct 05, 20263190
Oct 02, 2026319No prior observation