OITracker Cboe delayed data

Contract OI history

Back to COST

Jun 17, 2027 EXPIRATION

COST $1000.00 Put

COST270617P01000000

Latest saved OI142Oct 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 $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. 142710 2026-10-09: 136 OI2026-10-13: 139 OI2026-10-14: 139 OI2026-10-15: 140 OI2026-10-16: 140 OI2026-10-21: 142 OI2026-10-23: 142 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, 2026Viewing1420
Oct 21, 2026142+2
Oct 16, 20261400
Oct 15, 2026140+1
Oct 14, 20261390
Oct 13, 2026139+3
Oct 09, 2026136No prior observation