OITracker Cboe delayed data

Contract OI history

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Mar 19, 2027 EXPIRATION

B $38.00 Put

B270319P00038000

Latest saved OI3,801Oct 23, 2026
Last change+2vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
B $38.00 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. 3,8011,9000 2026-10-02: 3,784 OI2026-10-05: 3,784 OI2026-10-06: 3,784 OI2026-10-07: 3,784 OI2026-10-08: 3,788 OI2026-10-09: 3,790 OI2026-10-13: 3,790 OI2026-10-14: 3,790 OI2026-10-15: 3,800 OI2026-10-16: 3,800 OI2026-10-21: 3,799 OI2026-10-23: 3,801 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, 2026Viewing3,801+2
Oct 21, 20263,799-1
Oct 16, 20263,8000
Oct 15, 20263,800+10
Oct 14, 20263,7900
Oct 13, 20263,7900
Oct 09, 20263,790+2
Oct 08, 20263,788+4
Oct 07, 20263,7840
Oct 06, 20263,7840
Oct 05, 20263,7840
Oct 02, 20263,784No prior observation