OITracker Cboe delayed data

Contract OI history

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Jan 21, 2028 EXPIRATION

NB $17.50 Call

NB280121C00017500

Latest saved OI221Oct 23, 2026
Last change0vs previous saved observation
Saved market days6Oct 09, 2026 onwards
Daily open interest Hover a point for its date and OI
NB $17.50 call open interest history 6 saved observations from 2026-10-09 to 2026-10-23. Exact values and changes are listed in the table below. 2211100 2026-10-09: 221 OI2026-10-13: 221 OI2026-10-14: 221 OI2026-10-16: 221 OI2026-10-21: 221 OI2026-10-23: 221 OI Oct 09, 2026Oct 23, 2026

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

NB contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 20262210
Oct 21, 2026Viewing2210
Oct 16, 20262210
Oct 14, 20262210
Oct 13, 20262210
Oct 09, 2026221No prior observation