OITracker Cboe delayed data

Contract OI history

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Jan 15, 2027 EXPIRATION

B $40.00 Call

B270115C00040000

Latest saved OI13,231Oct 23, 2026
Last change+1,248vs 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. 13,2316,6150 2026-10-02: 11,762 OI2026-10-05: 11,768 OI2026-10-06: 11,768 OI2026-10-07: 11,768 OI2026-10-08: 11,838 OI2026-10-09: 11,858 OI2026-10-13: 11,846 OI2026-10-14: 11,846 OI2026-10-15: 11,881 OI2026-10-16: 11,807 OI2026-10-21: 11,983 OI2026-10-23: 13,231 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, 2026Viewing13,231+1,248
Oct 21, 202611,983+176
Oct 16, 202611,807-74
Oct 15, 202611,881+35
Oct 14, 202611,8460
Oct 13, 202611,846-12
Oct 09, 202611,858+20
Oct 08, 202611,838+70
Oct 07, 202611,7680
Oct 06, 202611,7680
Oct 05, 202611,768+6
Oct 02, 202611,762No prior observation