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Contract OI history

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Apr 16, 2027 EXPIRATION

HAFN $10.00 Put

HAFN270416P00010000

Latest saved OI601Oct 20, 2026
Last change+35vs 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. 6013000 2026-10-02: 6 OI2026-10-05: 8 OI2026-10-06: 565 OI2026-10-07: 565 OI2026-10-09: 592 OI2026-10-13: 595 OI2026-10-14: 601 OI2026-10-16: 566 OI2026-10-20: 601 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, 2026Viewing601+35
Oct 16, 2026566-35
Oct 14, 2026601+6
Oct 13, 2026595+3
Oct 09, 2026592+27
Oct 07, 20265650
Oct 06, 2026565+557
Oct 05, 20268+2
Oct 02, 20266No prior observation