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Contract OI history

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Dec 18, 2026 EXPIRATION

HCAT $2.50 Call

HCAT261218C00002500

Latest saved OI21,534Oct 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 call open interest history 7 saved observations from 2026-10-08 to 2026-10-23. Exact values and changes are listed in the table below. 21,53410,7670 2026-10-08: 21,534 OI2026-10-09: 21,534 OI2026-10-13: 21,534 OI2026-10-14: 21,534 OI2026-10-16: 21,534 OI2026-10-20: 21,534 OI2026-10-23: 21,534 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, 2026Viewing21,5340
Oct 20, 202621,5340
Oct 16, 202621,5340
Oct 14, 202621,5340
Oct 13, 202621,5340
Oct 09, 202621,5340
Oct 08, 202621,534No prior observation