OITracker Cboe delayed data

Contract OI history

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Nov 20, 2026 EXPIRATION

S $21.00 Put

S261120P00021000

Latest saved OI246Oct 23, 2026
Last change+8vs 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. 2461230 2026-10-02: 212 OI2026-10-05: 212 OI2026-10-06: 212 OI2026-10-07: 213 OI2026-10-08: 213 OI2026-10-09: 212 OI2026-10-13: 216 OI2026-10-14: 216 OI2026-10-15: 218 OI2026-10-16: 220 OI2026-10-21: 238 OI2026-10-23: 246 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, 2026Viewing246+8
Oct 21, 2026238+18
Oct 16, 2026220+2
Oct 15, 2026218+2
Oct 14, 20262160
Oct 13, 2026216+4
Oct 09, 2026212-1
Oct 08, 20262130
Oct 07, 2026213+1
Oct 06, 20262120
Oct 05, 20262120
Oct 02, 2026212No prior observation