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Contract OI history

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Mar 19, 2027 EXPIRATION

WDC $340.00 Put

WDC270319P00340000

Latest saved OI550Oct 23, 2026
Last change-1vs previous saved observation
Saved market days7Oct 09, 2026 onwards
Daily open interest Hover a point for its date and OI
WDC $340.00 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. 5512750 2026-10-09: 454 OI2026-10-12: 454 OI2026-10-14: 453 OI2026-10-15: 453 OI2026-10-16: 540 OI2026-10-21: 551 OI2026-10-23: 550 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, 2026Viewing550-1
Oct 21, 2026551+11
Oct 16, 2026540+87
Oct 15, 20264530
Oct 14, 2026453-1
Oct 12, 20264540
Oct 09, 2026454No prior observation