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Contract OI history

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Dec 18, 2026 EXPIRATION

BMO $170.00 Put

BMO261218P00170000

Latest saved OI269Oct 21, 2026
Last change0vs previous saved observation
Saved market days11Oct 01, 2026 onwards
Daily open interest Hover a point for its date and OI
BMO $170.00 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. 2691340 2026-10-01: 101 OI2026-10-02: 101 OI2026-10-05: 101 OI2026-10-06: 224 OI2026-10-07: 224 OI2026-10-08: 224 OI2026-10-09: 224 OI2026-10-13: 264 OI2026-10-14: 264 OI2026-10-16: 269 OI2026-10-21: 269 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, 2026Viewing2690
Oct 16, 2026269+5
Oct 14, 20262640
Oct 13, 2026264+40
Oct 09, 20262240
Oct 08, 20262240
Oct 07, 20262240
Oct 06, 2026224+123
Oct 05, 20261010
Oct 02, 20261010
Oct 01, 2026101No prior observation