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Contract OI history

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May 21, 2027 EXPIRATION

OUST $30.00 Put

OUST270521P00030000

Latest saved OI935Oct 23, 2026
Last change+301vs previous saved observation
Saved market days7Oct 09, 2026 onwards
Daily open interest Hover a point for its date and OI
OUST $30.00 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. 9354670 2026-10-09: 81 OI2026-10-13: 390 OI2026-10-14: 390 OI2026-10-15: 398 OI2026-10-16: 398 OI2026-10-21: 634 OI2026-10-23: 935 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, 2026Viewing935+301
Oct 21, 2026634+236
Oct 16, 20263980
Oct 15, 2026398+8
Oct 14, 20263900
Oct 13, 2026390+309
Oct 09, 202681No prior observation