OITracker Cboe delayed data

Contract OI history

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Jan 21, 2028 EXPIRATION

B $20.00 Call

B280121C00020000

Latest saved OI571Oct 23, 2026
Last change0vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
B $20.00 call open interest history 12 saved observations from 2026-10-02 to 2026-10-23. Exact values and changes are listed in the table below. 5802900 2026-10-02: 575 OI2026-10-05: 575 OI2026-10-06: 575 OI2026-10-07: 578 OI2026-10-08: 579 OI2026-10-09: 579 OI2026-10-13: 580 OI2026-10-14: 580 OI2026-10-15: 580 OI2026-10-16: 580 OI2026-10-21: 571 OI2026-10-23: 571 OI Oct 02, 2026Oct 23, 2026

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

B contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 2026Viewing5710
Oct 21, 2026571-9
Oct 16, 20265800
Oct 15, 20265800
Oct 14, 20265800
Oct 13, 2026580+1
Oct 09, 20265790
Oct 08, 2026579+1
Oct 07, 2026578+3
Oct 06, 20265750
Oct 05, 20265750
Oct 02, 2026575No prior observation