OITracker Cboe delayed data

Contract OI history

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Mar 19, 2027 EXPIRATION

B $41.00 Put

B270319P00041000

Latest saved OI1,917Oct 23, 2026
Last change-12vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
B $41.00 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. 1,9299640 2026-10-02: 1,874 OI2026-10-05: 1,876 OI2026-10-06: 1,876 OI2026-10-07: 1,893 OI2026-10-08: 1,893 OI2026-10-09: 1,893 OI2026-10-13: 1,925 OI2026-10-14: 1,925 OI2026-10-15: 1,926 OI2026-10-16: 1,926 OI2026-10-21: 1,929 OI2026-10-23: 1,917 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, 2026Viewing1,917-12
Oct 21, 20261,929+3
Oct 16, 20261,9260
Oct 15, 20261,926+1
Oct 14, 20261,9250
Oct 13, 20261,925+32
Oct 09, 20261,8930
Oct 08, 20261,8930
Oct 07, 20261,893+17
Oct 06, 20261,8760
Oct 05, 20261,876+2
Oct 02, 20261,874No prior observation