OITracker Cboe delayed data

Contract OI history

Back to MAR

Dec 18, 2026 EXPIRATION

MAR $320.00 Call

MAR261218C00320000

Latest saved OI182Oct 23, 2026
Last change0vs previous saved observation
Saved market days7Oct 09, 2026 onwards
Daily open interest Hover a point for its date and OI
MAR $320.00 call open interest history 7 saved observations from 2026-10-09 to 2026-10-23. Exact values and changes are listed in the table below. 187930 2026-10-09: 185 OI2026-10-13: 187 OI2026-10-14: 187 OI2026-10-15: 187 OI2026-10-16: 182 OI2026-10-21: 182 OI2026-10-23: 182 OI Oct 09, 2026Oct 23, 2026

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

MAR contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 2026Viewing1820
Oct 21, 20261820
Oct 16, 2026182-5
Oct 15, 20261870
Oct 14, 20261870
Oct 13, 2026187+2
Oct 09, 2026185No prior observation