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Contract OI history

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Mar 19, 2027 EXPIRATION

ACAD $21.00 Put

ACAD270319P00021000

Latest saved OI41Oct 23, 2026
Last change+39vs previous saved observation
Saved market days7Oct 08, 2026 onwards
Daily open interest Hover a point for its date and OI
ACAD $21.00 put open interest history 7 saved observations from 2026-10-08 to 2026-10-23. Exact values and changes are listed in the table below. 41200 2026-10-08: 2 OI2026-10-09: 2 OI2026-10-13: 2 OI2026-10-14: 2 OI2026-10-16: 2 OI2026-10-20: 2 OI2026-10-23: 41 OI Oct 08, 2026Oct 23, 2026

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

ACAD contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 2026Viewing41+39
Oct 20, 202620
Oct 16, 202620
Oct 14, 202620
Oct 13, 202620
Oct 09, 202620
Oct 08, 20262No prior observation