OITracker Cboe delayed data

Contract OI history

Back to COST

Oct 23, 2026 EXPIRATION

COST $600.00 Put

COST261023P00600000

Latest saved OI257Oct 23, 2026
Last change0vs previous saved observation
Saved market days7Oct 09, 2026 onwards
Daily open interest Hover a point for its date and OI
COST $600.00 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. 2571280 2026-10-09: 154 OI2026-10-13: 157 OI2026-10-14: 157 OI2026-10-15: 215 OI2026-10-16: 230 OI2026-10-21: 257 OI2026-10-23: 257 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, 2026Viewing2570
Oct 21, 2026257+27
Oct 16, 2026230+15
Oct 15, 2026215+58
Oct 14, 20261570
Oct 13, 2026157+3
Oct 09, 2026154No prior observation