OITracker Cboe delayed data

Contract OI history

Back to MAR

Dec 18, 2026 EXPIRATION

MAR $400.00 Call

MAR261218C00400000

Latest saved OI272Oct 23, 2026
Last change+9vs previous saved observation
Saved market days7Oct 09, 2026 onwards
Daily open interest Hover a point for its date and OI
MAR $400.00 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. 3301650 2026-10-09: 327 OI2026-10-13: 328 OI2026-10-14: 330 OI2026-10-15: 282 OI2026-10-16: 265 OI2026-10-21: 263 OI2026-10-23: 272 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, 2026Viewing272+9
Oct 21, 2026263-2
Oct 16, 2026265-17
Oct 15, 2026282-48
Oct 14, 2026330+2
Oct 13, 2026328+1
Oct 09, 2026327No prior observation