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Contract OI history

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Nov 20, 2026 EXPIRATION

GRBK $75.00 Call

GRBK261120C00075000

Latest saved OI74Oct 21, 2026
Last change-3vs previous saved observation
Saved market days10Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
GRBK $75.00 call open interest history 10 saved observations from 2026-10-02 to 2026-10-21. Exact values and changes are listed in the table below. 80400 2026-10-02: 78 OI2026-10-05: 79 OI2026-10-06: 80 OI2026-10-07: 80 OI2026-10-08: 79 OI2026-10-09: 79 OI2026-10-13: 79 OI2026-10-14: 79 OI2026-10-16: 77 OI2026-10-21: 74 OI Oct 02, 2026Oct 21, 2026

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

GRBK contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 21, 2026Viewing74-3
Oct 16, 202677-2
Oct 14, 2026790
Oct 13, 2026790
Oct 09, 2026790
Oct 08, 202679-1
Oct 07, 2026800
Oct 06, 202680+1
Oct 05, 202679+1
Oct 02, 202678No prior observation