OITracker Cboe delayed data

Contract OI history

Back to OUST

Oct 23, 2026 EXPIRATION

OUST $28.50 Put

OUST261023P00028500

Latest saved OI208Oct 23, 2026
Last change-9vs previous saved observation
Saved market days6Oct 13, 2026 onwards
Daily open interest Hover a point for its date and OI
OUST $28.50 put open interest history 6 saved observations from 2026-10-13 to 2026-10-23. Exact values and changes are listed in the table below. 2171080 2026-10-13: 0 OI2026-10-14: 0 OI2026-10-15: 1 OI2026-10-16: 177 OI2026-10-21: 217 OI2026-10-23: 208 OI Oct 13, 2026Oct 23, 2026

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

OUST contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 2026Viewing208-9
Oct 21, 2026217+40
Oct 16, 2026177+176
Oct 15, 20261+1
Oct 14, 202600
Oct 13, 20260No prior observation