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Contract OI history

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Dec 18, 2026 EXPIRATION

HRTX $1000.00 Put

HRTX261218P00001000

Latest saved OI57Oct 23, 2026
Last change0vs previous saved observation
Saved market days6Oct 09, 2026 onwards
Daily open interest Hover a point for its date and OI
HRTX $1000.00 put open interest history 6 saved observations from 2026-10-09 to 2026-10-23. Exact values and changes are listed in the table below. 58290 2026-10-09: 57 OI2026-10-13: 57 OI2026-10-14: 58 OI2026-10-16: 58 OI2026-10-20: 57 OI2026-10-23: 57 OI Oct 09, 2026Oct 23, 2026

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

HRTX contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 2026Viewing570
Oct 20, 202657-1
Oct 16, 2026580
Oct 14, 202658+1
Oct 13, 2026570
Oct 09, 202657No prior observation