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Contract OI history

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Nov 20, 2026 EXPIRATION

OUST $40.00 Put

OUST261120P00040000

Latest saved OI997Oct 23, 2026
Last change0vs previous saved observation
Saved market days7Oct 09, 2026 onwards
Daily open interest Hover a point for its date and OI
OUST $40.00 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. 1,0115050 2026-10-09: 1,010 OI2026-10-13: 1,011 OI2026-10-14: 1,011 OI2026-10-15: 1,000 OI2026-10-16: 996 OI2026-10-21: 997 OI2026-10-23: 997 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, 20269970
Oct 21, 2026Viewing997+1
Oct 16, 2026996-4
Oct 15, 20261,000-11
Oct 14, 20261,0110
Oct 13, 20261,011+1
Oct 09, 20261,010No prior observation