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Contract OI history

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Nov 20, 2026 EXPIRATION

ACHR $3.50 Put

ACHR261120P00003500

Latest saved OI276Oct 23, 2026
Last change+233vs previous saved observation
Saved market days2Oct 21, 2026 onwards
Daily open interest Hover a point for its date and OI
ACHR $3.50 put open interest history 2 saved observations from 2026-10-21 to 2026-10-23. Exact values and changes are listed in the table below. 2761380 2026-10-21: 43 OI2026-10-23: 276 OI Oct 21, 2026Oct 23, 2026

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

ACHR contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 2026Viewing276+233
Oct 21, 202643No prior observation