OITracker Cboe delayed data

Contract OI history

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Nov 27, 2026 EXPIRATION

B $38.00 Put

B261127P00038000

Latest saved OI31Oct 23, 2026
Last change+1vs previous saved observation
Saved market days8Oct 08, 2026 onwards
Daily open interest Hover a point for its date and OI
B $38.00 put open interest history 8 saved observations from 2026-10-08 to 2026-10-23. Exact values and changes are listed in the table below. 31150 2026-10-08: 0 OI2026-10-09: 17 OI2026-10-13: 23 OI2026-10-14: 23 OI2026-10-15: 28 OI2026-10-16: 28 OI2026-10-21: 30 OI2026-10-23: 31 OI Oct 08, 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, 2026Viewing31+1
Oct 21, 202630+2
Oct 16, 2026280
Oct 15, 202628+5
Oct 14, 2026230
Oct 13, 202623+6
Oct 09, 202617+17
Oct 08, 20260No prior observation