OITracker Cboe delayed data

Contract OI history

Back to GRBK

Nov 20, 2026 EXPIRATION

GRBK $65.00 Call

GRBK261120C00065000

Latest saved OI19Oct 21, 2026
Last change+14vs previous saved observation
Saved market days10Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
GRBK $65.00 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. 1990 2026-10-02: 2 OI2026-10-05: 2 OI2026-10-06: 2 OI2026-10-07: 2 OI2026-10-08: 5 OI2026-10-09: 5 OI2026-10-13: 5 OI2026-10-14: 5 OI2026-10-16: 5 OI2026-10-21: 19 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, 2026Viewing19+14
Oct 16, 202650
Oct 14, 202650
Oct 13, 202650
Oct 09, 202650
Oct 08, 20265+3
Oct 07, 202620
Oct 06, 202620
Oct 05, 202620
Oct 02, 20262No prior observation