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Contract OI history

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Nov 20, 2026 EXPIRATION

BMO $170.00 Put

BMO261120P00170000

Latest saved OI240Oct 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. 2401200 2026-10-01: 108 OI2026-10-02: 239 OI2026-10-05: 239 OI2026-10-06: 239 OI2026-10-07: 239 OI2026-10-08: 239 OI2026-10-09: 239 OI2026-10-13: 240 OI2026-10-14: 240 OI2026-10-16: 240 OI2026-10-21: 240 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, 2026Viewing2400
Oct 16, 20262400
Oct 14, 20262400
Oct 13, 2026240+1
Oct 09, 20262390
Oct 08, 20262390
Oct 07, 20262390
Oct 06, 20262390
Oct 05, 20262390
Oct 02, 2026239+131
Oct 01, 2026108No prior observation