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Contract OI history

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Nov 20, 2026 EXPIRATION

HAFN $10.00 Put

HAFN261120P00010000

Latest saved OI385Oct 20, 2026
Last change+101vs previous saved observation
Saved market days9Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
HAFN $10.00 put open interest history 9 saved observations from 2026-10-02 to 2026-10-20. Exact values and changes are listed in the table below. 3851920 2026-10-02: 30 OI2026-10-05: 30 OI2026-10-06: 66 OI2026-10-07: 68 OI2026-10-09: 151 OI2026-10-13: 175 OI2026-10-14: 215 OI2026-10-16: 284 OI2026-10-20: 385 OI Oct 02, 2026Oct 20, 2026

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

HAFN contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 20, 2026Viewing385+101
Oct 16, 2026284+69
Oct 14, 2026215+40
Oct 13, 2026175+24
Oct 09, 2026151+83
Oct 07, 202668+2
Oct 06, 202666+36
Oct 05, 2026300
Oct 02, 202630No prior observation