OITracker Cboe delayed data

Contract OI history

Back to WEST

Dec 18, 2026 EXPIRATION

WEST $6.00 Put

WEST261218P00006000

Latest saved OI356Oct 23, 2026
Last change0vs previous saved observation
Saved market days7Oct 08, 2026 onwards
Daily open interest Hover a point for its date and OI
WEST $6.00 put open interest history 7 saved observations from 2026-10-08 to 2026-10-23. Exact values and changes are listed in the table below. 3561780 2026-10-08: 356 OI2026-10-09: 356 OI2026-10-13: 356 OI2026-10-14: 356 OI2026-10-16: 356 OI2026-10-21: 356 OI2026-10-23: 356 OI Oct 08, 2026Oct 23, 2026

All saved dates are shown. Changes compare consecutive saved observations. Missing observations are not filled with zero.

WEST contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 2026Viewing3560
Oct 21, 20263560
Oct 16, 20263560
Oct 14, 20263560
Oct 13, 20263560
Oct 09, 20263560
Oct 08, 2026356No prior observation