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Contract OI history

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Jan 21, 2028 EXPIRATION

OUST $20.00 Put

OUST280121P00020000

Latest saved OI259Oct 23, 2026
Last change+2vs previous saved observation
Saved market days7Oct 09, 2026 onwards
Daily open interest Hover a point for its date and OI
OUST $20.00 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. 2591290 2026-10-09: 235 OI2026-10-13: 235 OI2026-10-14: 235 OI2026-10-15: 235 OI2026-10-16: 235 OI2026-10-21: 257 OI2026-10-23: 259 OI Oct 09, 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, 2026259+2
Oct 21, 2026Viewing257+22
Oct 16, 20262350
Oct 15, 20262350
Oct 14, 20262350
Oct 13, 20262350
Oct 09, 2026235No prior observation