OITracker Cboe delayed data

Contract OI history

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Nov 20, 2026 EXPIRATION

B $40.00 Call

B261120C00040000

Latest saved OI1,568Oct 23, 2026
Last change+15vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
B $40.00 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. 1,5687840 2026-10-02: 95 OI2026-10-05: 114 OI2026-10-06: 114 OI2026-10-07: 195 OI2026-10-08: 203 OI2026-10-09: 226 OI2026-10-13: 245 OI2026-10-14: 250 OI2026-10-15: 356 OI2026-10-16: 642 OI2026-10-21: 1,553 OI2026-10-23: 1,568 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, 2026Viewing1,568+15
Oct 21, 20261,553+911
Oct 16, 2026642+286
Oct 15, 2026356+106
Oct 14, 2026250+5
Oct 13, 2026245+19
Oct 09, 2026226+23
Oct 08, 2026203+8
Oct 07, 2026195+81
Oct 06, 20261140
Oct 05, 2026114+19
Oct 02, 202695No prior observation