OITracker Cboe delayed data

Contract OI history

Back to COST

Mar 19, 2027 EXPIRATION

COST $740.00 Put

COST270319P00740000

Latest saved OI132Oct 23, 2026
Last change+1vs 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. 132660 2026-10-09: 130 OI2026-10-13: 130 OI2026-10-14: 130 OI2026-10-15: 130 OI2026-10-16: 130 OI2026-10-21: 131 OI2026-10-23: 132 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, 2026Viewing132+1
Oct 21, 2026131+1
Oct 16, 20261300
Oct 15, 20261300
Oct 14, 20261300
Oct 13, 20261300
Oct 09, 2026130No prior observation