OITracker Cboe delayed data

Contract OI history

Back to BIRK

Jan 15, 2027 EXPIRATION

BIRK $35.00 Put

BIRK270115P00035000

Latest saved OI1,602Oct 23, 2026
Last change+10vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
BIRK $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. 1,6028010 2026-10-02: 1,523 OI2026-10-05: 1,523 OI2026-10-06: 1,523 OI2026-10-07: 1,531 OI2026-10-08: 1,531 OI2026-10-09: 1,556 OI2026-10-13: 1,556 OI2026-10-14: 1,556 OI2026-10-15: 1,596 OI2026-10-16: 1,594 OI2026-10-20: 1,592 OI2026-10-23: 1,602 OI Oct 02, 2026Oct 23, 2026

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

BIRK contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 2026Viewing1,602+10
Oct 20, 20261,592-2
Oct 16, 20261,594-2
Oct 15, 20261,596+40
Oct 14, 20261,5560
Oct 13, 20261,5560
Oct 09, 20261,556+25
Oct 08, 20261,5310
Oct 07, 20261,531+8
Oct 06, 20261,5230
Oct 05, 20261,5230
Oct 02, 20261,523No prior observation