OITracker Cboe delayed data

Contract OI history

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Dec 18, 2026 EXPIRATION

B $30.00 Put

B261218P00030000

Latest saved OI4,530Oct 23, 2026
Last change-1vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
B $30.00 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. 4,5532,2760 2026-10-02: 4,552 OI2026-10-05: 4,553 OI2026-10-06: 4,553 OI2026-10-07: 4,551 OI2026-10-08: 4,538 OI2026-10-09: 4,538 OI2026-10-13: 4,535 OI2026-10-14: 4,535 OI2026-10-15: 4,531 OI2026-10-16: 4,531 OI2026-10-21: 4,531 OI2026-10-23: 4,530 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, 2026Viewing4,530-1
Oct 21, 20264,5310
Oct 16, 20264,5310
Oct 15, 20264,531-4
Oct 14, 20264,5350
Oct 13, 20264,535-3
Oct 09, 20264,5380
Oct 08, 20264,538-13
Oct 07, 20264,551-2
Oct 06, 20264,5530
Oct 05, 20264,553+1
Oct 02, 20264,552No prior observation