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Contract OI history

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Dec 18, 2026 EXPIRATION

WDC $440.00 Put

WDC261218P00440000

Latest saved OI242Oct 23, 2026
Last change0vs 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. 2551270 2026-10-09: 255 OI2026-10-12: 255 OI2026-10-14: 244 OI2026-10-15: 243 OI2026-10-16: 244 OI2026-10-21: 242 OI2026-10-23: 242 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, 2026Viewing2420
Oct 21, 2026242-2
Oct 16, 2026244+1
Oct 15, 2026243-1
Oct 14, 2026244-11
Oct 12, 20262550
Oct 09, 2026255No prior observation