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Contract OI history

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Mar 19, 2027 EXPIRATION

HSTM $35.00 Call

HSTM270319C00035000

Latest saved OI19Oct 23, 2026
Last change0vs previous saved observation
Saved market days6Oct 09, 2026 onwards
Daily open interest Hover a point for its date and OI
HSTM $35.00 call open interest history 6 saved observations from 2026-10-09 to 2026-10-23. Exact values and changes are listed in the table below. 1990 2026-10-09: 17 OI2026-10-13: 17 OI2026-10-14: 17 OI2026-10-16: 18 OI2026-10-20: 19 OI2026-10-23: 19 OI Oct 09, 2026Oct 23, 2026

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

HSTM contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 2026190
Oct 20, 2026Viewing19+1
Oct 16, 202618+1
Oct 14, 2026170
Oct 13, 2026170
Oct 09, 202617No prior observation