OITracker Cboe delayed data

Contract OI history

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May 21, 2027 EXPIRATION

ON $180.00 Call

ON270521C00180000

Latest saved OI195Oct 23, 2026
Last change0vs previous saved observation
Saved market days7Oct 09, 2026 onwards
Daily open interest Hover a point for its date and OI
ON $180.00 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. 195970 2026-10-09: 145 OI2026-10-13: 145 OI2026-10-14: 145 OI2026-10-15: 195 OI2026-10-16: 195 OI2026-10-21: 195 OI2026-10-23: 195 OI Oct 09, 2026Oct 23, 2026

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

ON contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 2026Viewing1950
Oct 21, 20261950
Oct 16, 20261950
Oct 15, 2026195+50
Oct 14, 20261450
Oct 13, 20261450
Oct 09, 2026145No prior observation