OITracker Cboe delayed data

Contract OI history

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Nov 20, 2026 EXPIRATION

B $37.00 Put

B261120P00037000

Latest saved OI174Oct 23, 2026
Last change+28vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
B $37.00 put open interest history 12 saved observations from 2026-10-02 to 2026-10-23. Exact values and changes are listed in the table below. 174870 2026-10-02: 44 OI2026-10-05: 56 OI2026-10-06: 56 OI2026-10-07: 55 OI2026-10-08: 60 OI2026-10-09: 60 OI2026-10-13: 61 OI2026-10-14: 70 OI2026-10-15: 116 OI2026-10-16: 115 OI2026-10-21: 146 OI2026-10-23: 174 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, 2026Viewing174+28
Oct 21, 2026146+31
Oct 16, 2026115-1
Oct 15, 2026116+46
Oct 14, 202670+9
Oct 13, 202661+1
Oct 09, 2026600
Oct 08, 202660+5
Oct 07, 202655-1
Oct 06, 2026560
Oct 05, 202656+12
Oct 02, 202644No prior observation