OITracker Cboe delayed data

Contract OI history

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May 21, 2027 EXPIRATION

OPEN $4.00 Call

OPEN270521C00004000

Latest saved OI1,450Oct 23, 2026
Last change-7vs previous saved observation
Saved market days7Oct 09, 2026 onwards
Daily open interest Hover a point for its date and OI
OPEN $4.00 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. 1,5427710 2026-10-09: 1,542 OI2026-10-13: 1,392 OI2026-10-14: 1,392 OI2026-10-15: 1,398 OI2026-10-16: 1,406 OI2026-10-21: 1,457 OI2026-10-23: 1,450 OI Oct 09, 2026Oct 23, 2026

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

OPEN contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 2026Viewing1,450-7
Oct 21, 20261,457+51
Oct 16, 20261,406+8
Oct 15, 20261,398+6
Oct 14, 20261,3920
Oct 13, 20261,392-150
Oct 09, 20261,542No prior observation