OITracker Cboe delayed data

Contract OI history

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Dec 15, 2028 EXPIRATION

WDC $400.00 Put

WDC281215P00400000

Latest saved OI288Oct 23, 2026
Last change-11vs previous saved observation
Saved market days7Oct 09, 2026 onwards
Daily open interest Hover a point for its date and OI
WDC $400.00 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. 3041520 2026-10-09: 304 OI2026-10-12: 303 OI2026-10-14: 303 OI2026-10-15: 303 OI2026-10-16: 303 OI2026-10-21: 299 OI2026-10-23: 288 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, 2026Viewing288-11
Oct 21, 2026299-4
Oct 16, 20263030
Oct 15, 20263030
Oct 14, 20263030
Oct 12, 2026303-1
Oct 09, 2026304No prior observation