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Contract OI history

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Dec 18, 2026 EXPIRATION

BMO $155.00 Put

BMO261218P00155000

Latest saved OI306Oct 21, 2026
Last change+1vs previous saved observation
Saved market days11Oct 01, 2026 onwards
Daily open interest Hover a point for its date and OI
BMO $155.00 put open interest history 11 saved observations from 2026-10-01 to 2026-10-21. Exact values and changes are listed in the table below. 3061530 2026-10-01: 304 OI2026-10-02: 304 OI2026-10-05: 305 OI2026-10-06: 305 OI2026-10-07: 305 OI2026-10-08: 305 OI2026-10-09: 305 OI2026-10-13: 305 OI2026-10-14: 305 OI2026-10-16: 305 OI2026-10-21: 306 OI Oct 01, 2026Oct 21, 2026

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

BMO contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 21, 2026Viewing306+1
Oct 16, 20263050
Oct 14, 20263050
Oct 13, 20263050
Oct 09, 20263050
Oct 08, 20263050
Oct 07, 20263050
Oct 06, 20263050
Oct 05, 2026305+1
Oct 02, 20263040
Oct 01, 2026304No prior observation