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Contract OI history

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Dec 18, 2026 EXPIRATION

OUST $20.00 Put

OUST261218P00020000

Latest saved OI15Oct 23, 2026
Last change+7vs previous saved observation
Saved market days2Oct 21, 2026 onwards
Daily open interest Hover a point for its date and OI
OUST $20.00 put open interest history 2 saved observations from 2026-10-21 to 2026-10-23. Exact values and changes are listed in the table below. 1570 2026-10-21: 8 OI2026-10-23: 15 OI Oct 21, 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, 202615+7
Oct 21, 2026Viewing8No prior observation