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Contract OI history

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Oct 23, 2026 EXPIRATION

WDC $400.00 Put

WDC261023P00400000

Latest saved OI437Oct 23, 2026
Last change-97vs previous saved observation
Saved market days7Oct 09, 2026 onwards
Daily open interest Hover a point for its date and OI
WDC $400.00 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. 6413200 2026-10-09: 580 OI2026-10-12: 616 OI2026-10-14: 593 OI2026-10-15: 616 OI2026-10-16: 641 OI2026-10-21: 534 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, 2026Viewing437-97
Oct 21, 2026534-107
Oct 16, 2026641+25
Oct 15, 2026616+23
Oct 14, 2026593-23
Oct 12, 2026616+36
Oct 09, 2026580No prior observation