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Contract OI history

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Nov 20, 2026 EXPIRATION

WAT $400.00 Call

WAT261120C00400000

Latest saved OI45Oct 23, 2026
Last change0vs previous saved observation
Saved market days11Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
WAT $400.00 call open interest history 11 saved observations from 2026-10-02 to 2026-10-23. Exact values and changes are listed in the table below. 45220 2026-10-02: 14 OI2026-10-05: 14 OI2026-10-06: 14 OI2026-10-07: 14 OI2026-10-08: 14 OI2026-10-09: 14 OI2026-10-14: 42 OI2026-10-15: 44 OI2026-10-16: 45 OI2026-10-21: 45 OI2026-10-23: 45 OI Oct 02, 2026Oct 23, 2026

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

WAT contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 2026450
Oct 21, 2026Viewing450
Oct 16, 202645+1
Oct 15, 202644+2
Oct 14, 202642+28
Oct 09, 2026140
Oct 08, 2026140
Oct 07, 2026140
Oct 06, 2026140
Oct 05, 2026140
Oct 02, 202614No prior observation