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Contract OI history

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Dec 18, 2026 EXPIRATION

HRTX $500.00 Put

HRTX261218P00000500

Latest saved OI129Oct 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. 129640 2026-10-09: 33 OI2026-10-13: 33 OI2026-10-14: 33 OI2026-10-16: 34 OI2026-10-20: 129 OI2026-10-23: 129 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, 2026Viewing1290
Oct 20, 2026129+95
Oct 16, 202634+1
Oct 14, 2026330
Oct 13, 2026330
Oct 09, 202633No prior observation