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Contract OI history

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Nov 20, 2026 EXPIRATION

WDC $440.00 Put

WDC261120P00440000

Latest saved OI437Oct 23, 2026
Last change+16vs previous saved observation
Saved market days7Oct 09, 2026 onwards
Daily open interest Hover a point for its date and OI
WDC $440.00 put open interest history 7 saved observations from 2026-10-09 to 2026-10-23. Exact values and changes are listed in the table below. 4372180 2026-10-09: 239 OI2026-10-12: 403 OI2026-10-14: 409 OI2026-10-15: 420 OI2026-10-16: 416 OI2026-10-21: 421 OI2026-10-23: 437 OI Oct 09, 2026Oct 23, 2026

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

WDC contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 2026Viewing437+16
Oct 21, 2026421+5
Oct 16, 2026416-4
Oct 15, 2026420+11
Oct 14, 2026409+6
Oct 12, 2026403+164
Oct 09, 2026239No prior observation