OITracker Cboe delayed data

Contract OI history

Back to COST

Jan 15, 2027 EXPIRATION

COST $990.00 Put

COST270115P00990000

Latest saved OI345Oct 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 $990.00 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. 3451720 2026-10-09: 337 OI2026-10-13: 336 OI2026-10-14: 336 OI2026-10-15: 336 OI2026-10-16: 336 OI2026-10-21: 345 OI2026-10-23: 345 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, 2026Viewing3450
Oct 21, 2026345+9
Oct 16, 20263360
Oct 15, 20263360
Oct 14, 20263360
Oct 13, 2026336-1
Oct 09, 2026337No prior observation