OITracker Cboe delayed data

Contract OI history

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Jan 15, 2027 EXPIRATION

BSP $40.00 Put

BSP270115P00040000

Latest saved OI1,379Oct 23, 2026
Last change+1vs previous saved observation
Saved market days7Oct 08, 2026 onwards
Daily open interest Hover a point for its date and OI
BSP $40.00 put open interest history 7 saved observations from 2026-10-08 to 2026-10-23. Exact values and changes are listed in the table below. 1,3796890 2026-10-08: 33 OI2026-10-13: 33 OI2026-10-14: 34 OI2026-10-15: 1,321 OI2026-10-16: 1,324 OI2026-10-21: 1,378 OI2026-10-23: 1,379 OI Oct 08, 2026Oct 23, 2026

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

BSP contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 2026Viewing1,379+1
Oct 21, 20261,378+54
Oct 16, 20261,324+3
Oct 15, 20261,321+1,287
Oct 14, 202634+1
Oct 13, 2026330
Oct 08, 202633No prior observation