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Contract OI history

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Jun 17, 2027 EXPIRATION

CB $340.00 Put

CB270617P00340000

Latest saved OI149Oct 23, 2026
Last change+21vs 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. 149740 2026-10-02: 119 OI2026-10-05: 119 OI2026-10-06: 119 OI2026-10-07: 119 OI2026-10-08: 119 OI2026-10-09: 119 OI2026-10-13: 128 OI2026-10-14: 128 OI2026-10-15: 128 OI2026-10-16: 128 OI2026-10-21: 128 OI2026-10-23: 149 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, 2026Viewing149+21
Oct 21, 20261280
Oct 16, 20261280
Oct 15, 20261280
Oct 14, 20261280
Oct 13, 2026128+9
Oct 09, 20261190
Oct 08, 20261190
Oct 07, 20261190
Oct 06, 20261190
Oct 05, 20261190
Oct 02, 2026119No prior observation