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Contract OI history

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Jan 21, 2028 EXPIRATION

OUST $27.00 Put

OUST280121P00027000

Latest saved OI255Oct 23, 2026
Last change+3vs previous saved observation
Saved market days7Oct 09, 2026 onwards
Daily open interest Hover a point for its date and OI
OUST $27.00 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. 2641320 2026-10-09: 264 OI2026-10-13: 264 OI2026-10-14: 264 OI2026-10-15: 264 OI2026-10-16: 253 OI2026-10-21: 252 OI2026-10-23: 255 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, 2026Viewing255+3
Oct 21, 2026252-1
Oct 16, 2026253-11
Oct 15, 20262640
Oct 14, 20262640
Oct 13, 20262640
Oct 09, 2026264No prior observation