OITracker Cboe delayed data

Contract OI history

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Nov 27, 2026 EXPIRATION

S $21.00 Put

S261127P00021000

Latest saved OI7Oct 23, 2026
Last change0vs previous saved observation
Saved market days9Oct 07, 2026 onwards
Daily open interest Hover a point for its date and OI
S $21.00 put open interest history 9 saved observations from 2026-10-07 to 2026-10-23. Exact values and changes are listed in the table below. 730 2026-10-07: 0 OI2026-10-08: 0 OI2026-10-09: 0 OI2026-10-13: 4 OI2026-10-14: 4 OI2026-10-15: 4 OI2026-10-16: 4 OI2026-10-21: 7 OI2026-10-23: 7 OI Oct 07, 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, 2026Viewing70
Oct 21, 20267+3
Oct 16, 202640
Oct 15, 202640
Oct 14, 202640
Oct 13, 20264+4
Oct 09, 202600
Oct 08, 202600
Oct 07, 20260No prior observation