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Contract OI history

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Dec 18, 2026 EXPIRATION

WDC $320.00 Put

WDC261218P00320000

Latest saved OI875Oct 23, 2026
Last change+46vs previous saved observation
Saved market days7Oct 09, 2026 onwards
Daily open interest Hover a point for its date and OI
WDC $320.00 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. 8754370 2026-10-09: 725 OI2026-10-12: 726 OI2026-10-14: 732 OI2026-10-15: 737 OI2026-10-16: 771 OI2026-10-21: 829 OI2026-10-23: 875 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, 2026Viewing875+46
Oct 21, 2026829+58
Oct 16, 2026771+34
Oct 15, 2026737+5
Oct 14, 2026732+6
Oct 12, 2026726+1
Oct 09, 2026725No prior observation