OITracker Cboe delayed data

Contract OI history

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Mar 19, 2027 EXPIRATION

B $35.00 Put

B270319P00035000

Latest saved OI1,345Oct 23, 2026
Last change-17vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
B $35.00 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. 1,3626810 2026-10-02: 886 OI2026-10-05: 895 OI2026-10-06: 895 OI2026-10-07: 902 OI2026-10-08: 903 OI2026-10-09: 903 OI2026-10-13: 917 OI2026-10-14: 926 OI2026-10-15: 934 OI2026-10-16: 1,360 OI2026-10-21: 1,362 OI2026-10-23: 1,345 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, 2026Viewing1,345-17
Oct 21, 20261,362+2
Oct 16, 20261,360+426
Oct 15, 2026934+8
Oct 14, 2026926+9
Oct 13, 2026917+14
Oct 09, 20269030
Oct 08, 2026903+1
Oct 07, 2026902+7
Oct 06, 20268950
Oct 05, 2026895+9
Oct 02, 2026886No prior observation