OITracker Cboe delayed data

Contract OI history

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Dec 18, 2026 EXPIRATION

HAL $28.00 Put

HAL261218P00028000

Latest saved OI1,708Oct 23, 2026
Last change+1vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
HAL $28.00 put open interest history 12 saved observations from 2026-10-02 to 2026-10-23. Exact values and changes are listed in the table below. 1,7978980 2026-10-02: 1,797 OI2026-10-05: 1,797 OI2026-10-06: 1,683 OI2026-10-07: 1,685 OI2026-10-08: 1,685 OI2026-10-09: 1,685 OI2026-10-13: 1,709 OI2026-10-14: 1,709 OI2026-10-15: 1,709 OI2026-10-16: 1,786 OI2026-10-21: 1,707 OI2026-10-23: 1,708 OI Oct 02, 2026Oct 23, 2026

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

HAL contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 2026Viewing1,708+1
Oct 21, 20261,707-79
Oct 16, 20261,786+77
Oct 15, 20261,7090
Oct 14, 20261,7090
Oct 13, 20261,709+24
Oct 09, 20261,6850
Oct 08, 20261,6850
Oct 07, 20261,685+2
Oct 06, 20261,683-114
Oct 05, 20261,7970
Oct 02, 20261,797No prior observation