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Contract OI history

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Nov 20, 2026 EXPIRATION

WAT $440.00 Call

WAT261120C00440000

Latest saved OI255Oct 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 $440.00 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. 2551270 2026-10-02: 110 OI2026-10-05: 110 OI2026-10-06: 110 OI2026-10-07: 110 OI2026-10-08: 110 OI2026-10-09: 110 OI2026-10-14: 111 OI2026-10-15: 111 OI2026-10-16: 114 OI2026-10-21: 255 OI2026-10-23: 255 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, 2026Viewing2550
Oct 21, 2026255+141
Oct 16, 2026114+3
Oct 15, 20261110
Oct 14, 2026111+1
Oct 09, 20261100
Oct 08, 20261100
Oct 07, 20261100
Oct 06, 20261100
Oct 05, 20261100
Oct 02, 2026110No prior observation