OITracker Cboe delayed data

Contract OI history

Back to COST

Oct 30, 2026 EXPIRATION

COST $920.00 Put

COST261030P00920000

Latest saved OI316Oct 23, 2026
Last change+8vs previous saved observation
Saved market days7Oct 09, 2026 onwards
Daily open interest Hover a point for its date and OI
COST $920.00 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. 3381690 2026-10-09: 276 OI2026-10-13: 338 OI2026-10-14: 338 OI2026-10-15: 332 OI2026-10-16: 322 OI2026-10-21: 308 OI2026-10-23: 316 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, 2026Viewing316+8
Oct 21, 2026308-14
Oct 16, 2026322-10
Oct 15, 2026332-6
Oct 14, 20263380
Oct 13, 2026338+62
Oct 09, 2026276No prior observation