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Contract OI history

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Dec 18, 2026 EXPIRATION

CB $340.00 Put

CB261218P00340000

Latest saved OI538Oct 23, 2026
Last change+1vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
CB $340.00 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. 5492740 2026-10-02: 507 OI2026-10-05: 507 OI2026-10-06: 507 OI2026-10-07: 510 OI2026-10-08: 510 OI2026-10-09: 509 OI2026-10-13: 549 OI2026-10-14: 549 OI2026-10-15: 549 OI2026-10-16: 536 OI2026-10-21: 537 OI2026-10-23: 538 OI Oct 02, 2026Oct 23, 2026

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

CB contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 2026Viewing538+1
Oct 21, 2026537+1
Oct 16, 2026536-13
Oct 15, 20265490
Oct 14, 20265490
Oct 13, 2026549+40
Oct 09, 2026509-1
Oct 08, 20265100
Oct 07, 2026510+3
Oct 06, 20265070
Oct 05, 20265070
Oct 02, 2026507No prior observation