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Contract OI history

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Dec 18, 2026 EXPIRATION

ALDX $1.50 Put

ALDX261218P00001500

Latest saved OI100Oct 21, 2026
Last change0vs previous saved observation
Saved market days5Oct 09, 2026 onwards
Daily open interest Hover a point for its date and OI
ALDX $1.50 put open interest history 5 saved observations from 2026-10-09 to 2026-10-21. Exact values and changes are listed in the table below. 100500 2026-10-09: 100 OI2026-10-13: 100 OI2026-10-14: 100 OI2026-10-16: 100 OI2026-10-21: 100 OI Oct 09, 2026Oct 21, 2026

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

ALDX contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 21, 2026Viewing1000
Oct 16, 20261000
Oct 14, 20261000
Oct 13, 20261000
Oct 09, 2026100No prior observation