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Contract OI history

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Nov 20, 2026 EXPIRATION

WDC $320.00 Put

WDC261120P00320000

Latest saved OI1,000Oct 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. 1,0465230 2026-10-09: 351 OI2026-10-12: 476 OI2026-10-14: 625 OI2026-10-15: 689 OI2026-10-16: 1,001 OI2026-10-21: 1,046 OI2026-10-23: 1,000 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, 2026Viewing1,000-46
Oct 21, 20261,046+45
Oct 16, 20261,001+312
Oct 15, 2026689+64
Oct 14, 2026625+149
Oct 12, 2026476+125
Oct 09, 2026351No prior observation