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Contract OI history

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May 21, 2027 EXPIRATION

HEI $350.00 Call

HEI270521C00350000

Latest saved OI15Oct 20, 2026
Last change-10vs previous saved observation
Saved market days10Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
HEI $350.00 call open interest history 10 saved observations from 2026-10-02 to 2026-10-20. Exact values and changes are listed in the table below. 25120 2026-10-02: 15 OI2026-10-05: 17 OI2026-10-06: 17 OI2026-10-07: 17 OI2026-10-08: 20 OI2026-10-09: 20 OI2026-10-13: 20 OI2026-10-14: 25 OI2026-10-16: 25 OI2026-10-20: 15 OI Oct 02, 2026Oct 20, 2026

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

HEI contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 20, 2026Viewing15-10
Oct 16, 2026250
Oct 14, 202625+5
Oct 13, 2026200
Oct 09, 2026200
Oct 08, 202620+3
Oct 07, 2026170
Oct 06, 2026170
Oct 05, 202617+2
Oct 02, 202615No prior observation