OITracker Cboe delayed data

Contract OI history

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Dec 18, 2026 EXPIRATION

B $42.00 Put

B261218P00042000

Latest saved OI1,310Oct 23, 2026
Last change0vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
B $42.00 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. 1,3136560 2026-10-02: 1,170 OI2026-10-05: 1,219 OI2026-10-06: 1,219 OI2026-10-07: 1,218 OI2026-10-08: 1,269 OI2026-10-09: 1,264 OI2026-10-13: 1,313 OI2026-10-14: 1,312 OI2026-10-15: 1,312 OI2026-10-16: 1,309 OI2026-10-21: 1,310 OI2026-10-23: 1,310 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, 2026Viewing1,3100
Oct 21, 20261,310+1
Oct 16, 20261,309-3
Oct 15, 20261,3120
Oct 14, 20261,312-1
Oct 13, 20261,313+49
Oct 09, 20261,264-5
Oct 08, 20261,269+51
Oct 07, 20261,218-1
Oct 06, 20261,2190
Oct 05, 20261,219+49
Oct 02, 20261,170No prior observation