OITracker Cboe delayed data

Contract OI history

Back to ET

Dec 18, 2026 EXPIRATION

ET $21.00 Call

ET261218C00021000

Latest saved OI7,328Oct 08, 2026
Last change-2vs 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. 7,3303,6650 2026-10-02: 7,252 OI2026-10-05: 7,186 OI2026-10-06: 7,238 OI2026-10-07: 7,330 OI2026-10-08: 7,328 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, 2026Viewing7,328-2
Oct 07, 20267,330+92
Oct 06, 20267,238+52
Oct 05, 20267,186-66
Oct 02, 20267,252No prior observation