OITracker Cboe delayed data

Contract OI history

Back to COST

Jan 15, 2027 EXPIRATION

COST $740.00 Put

COST270115P00740000

Latest saved OI318Oct 23, 2026
Last change+5vs previous saved observation
Saved market days7Oct 09, 2026 onwards
Daily open interest Hover a point for its date and OI
COST $740.00 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. 3241620 2026-10-09: 324 OI2026-10-13: 324 OI2026-10-14: 324 OI2026-10-15: 323 OI2026-10-16: 323 OI2026-10-21: 313 OI2026-10-23: 318 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, 2026Viewing318+5
Oct 21, 2026313-10
Oct 16, 20263230
Oct 15, 2026323-1
Oct 14, 20263240
Oct 13, 20263240
Oct 09, 2026324No prior observation