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Contract OI history

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Dec 18, 2026 EXPIRATION

WDC $20.00 Put

WDC261218P00020000

Latest saved OI622Oct 23, 2026
Last change+5vs previous saved observation
Saved market days7Oct 09, 2026 onwards
Daily open interest Hover a point for its date and OI
WDC $20.00 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. 6223110 2026-10-09: 616 OI2026-10-12: 616 OI2026-10-14: 616 OI2026-10-15: 616 OI2026-10-16: 616 OI2026-10-21: 617 OI2026-10-23: 622 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, 2026Viewing622+5
Oct 21, 2026617+1
Oct 16, 20266160
Oct 15, 20266160
Oct 14, 20266160
Oct 12, 20266160
Oct 09, 2026616No prior observation