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Contract OI history

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Dec 18, 2026 EXPIRATION

HCAT $2.50 Put

HCAT261218P00002500

Latest saved OI16,104Oct 23, 2026
Last change0vs previous saved observation
Saved market days7Oct 08, 2026 onwards
Daily open interest Hover a point for its date and OI
HCAT $2.50 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. 16,1208,0600 2026-10-08: 16,120 OI2026-10-09: 16,120 OI2026-10-13: 16,120 OI2026-10-14: 16,120 OI2026-10-16: 16,120 OI2026-10-20: 16,104 OI2026-10-23: 16,104 OI Oct 08, 2026Oct 23, 2026

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

HCAT contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 2026Viewing16,1040
Oct 20, 202616,104-16
Oct 16, 202616,1200
Oct 14, 202616,1200
Oct 13, 202616,1200
Oct 09, 202616,1200
Oct 08, 202616,120No prior observation