OITracker Cboe delayed data

Contract OI history

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Dec 15, 2028 EXPIRATION

COST $1000.00 Put

COST281215P01000000

Latest saved OI198Oct 23, 2026
Last change-3vs previous saved observation
Saved market days7Oct 09, 2026 onwards
Daily open interest Hover a point for its date and OI
COST $1000.00 put open interest history 7 saved observations from 2026-10-09 to 2026-10-23. Exact values and changes are listed in the table below. 2011000 2026-10-09: 197 OI2026-10-13: 197 OI2026-10-14: 197 OI2026-10-15: 199 OI2026-10-16: 199 OI2026-10-21: 201 OI2026-10-23: 198 OI Oct 09, 2026Oct 23, 2026

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

COST contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 2026Viewing198-3
Oct 21, 2026201+2
Oct 16, 20261990
Oct 15, 2026199+2
Oct 14, 20261970
Oct 13, 20261970
Oct 09, 2026197No prior observation