OITracker Cboe delayed data

Contract OI history

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Dec 18, 2026 EXPIRATION

ALT $2.50 Put

ALT261218P00002500

Latest saved OI2,105Oct 20, 2026
Last change0vs previous saved observation
Saved market days5Oct 09, 2026 onwards
Daily open interest Hover a point for its date and OI
ALT $2.50 put open interest history 5 saved observations from 2026-10-09 to 2026-10-20. Exact values and changes are listed in the table below. 2,1051,0520 2026-10-09: 2,100 OI2026-10-13: 2,105 OI2026-10-14: 2,105 OI2026-10-16: 2,105 OI2026-10-20: 2,105 OI Oct 09, 2026Oct 20, 2026

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

ALT contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 20, 2026Viewing2,1050
Oct 16, 20262,1050
Oct 14, 20262,1050
Oct 13, 20262,105+5
Oct 09, 20262,100No prior observation