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Contract OI history

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Nov 20, 2026 EXPIRATION

ROOT $40.00 Put

ROOT261120P00040000

Latest saved OI398Oct 23, 2026
Last change+1vs previous saved observation
Saved market days7Oct 09, 2026 onwards
Daily open interest Hover a point for its date and OI
ROOT $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. 3981990 2026-10-09: 321 OI2026-10-13: 343 OI2026-10-14: 369 OI2026-10-15: 398 OI2026-10-16: 397 OI2026-10-21: 397 OI2026-10-23: 398 OI Oct 09, 2026Oct 23, 2026

All saved dates are shown. Changes compare consecutive saved observations. Missing observations are not filled with zero.

ROOT contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 2026Viewing398+1
Oct 21, 20263970
Oct 16, 2026397-1
Oct 15, 2026398+29
Oct 14, 2026369+26
Oct 13, 2026343+22
Oct 09, 2026321No prior observation