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Contract OI history

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Nov 20, 2026 EXPIRATION

HRTX $500.00 Put

HRTX261120P00000500

Latest saved OI20,958Oct 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 $500.00 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. 20,95810,4790 2026-10-09: 4 OI2026-10-13: 4 OI2026-10-14: 4 OI2026-10-16: 20,958 OI2026-10-20: 20,958 OI2026-10-23: 20,958 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, 2026Viewing20,9580
Oct 20, 202620,9580
Oct 16, 202620,958+20,954
Oct 14, 202640
Oct 13, 202640
Oct 09, 20264No prior observation