OITracker Cboe delayed data

Contract OI history

Back to COST

Jan 15, 2027 EXPIRATION

COST $1000.00 Put

COST270115P01000000

Latest saved OI1,022Oct 23, 2026
Last change+51vs 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. 1,0225110 2026-10-09: 933 OI2026-10-13: 932 OI2026-10-14: 932 OI2026-10-15: 930 OI2026-10-16: 931 OI2026-10-21: 971 OI2026-10-23: 1,022 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, 2026Viewing1,022+51
Oct 21, 2026971+40
Oct 16, 2026931+1
Oct 15, 2026930-2
Oct 14, 20269320
Oct 13, 2026932-1
Oct 09, 2026933No prior observation