OITracker Cboe delayed data

Contract OI history

Back to ET

Oct 30, 2026 EXPIRATION

ET $21.00 Call

ET261030C00021000

Latest saved OI1,047Oct 08, 2026
Last change-9vs previous saved observation
Saved market days5Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
ET $21.00 call open interest history 5 saved observations from 2026-10-02 to 2026-10-08. Exact values and changes are listed in the table below. 1,0565280 2026-10-02: 648 OI2026-10-05: 942 OI2026-10-06: 1,039 OI2026-10-07: 1,056 OI2026-10-08: 1,047 OI Oct 02, 2026Oct 08, 2026

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

ET contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 08, 2026Viewing1,047-9
Oct 07, 20261,056+17
Oct 06, 20261,039+97
Oct 05, 2026942+294
Oct 02, 2026648No prior observation