OITracker Cboe delayed data

Contract OI history

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Jan 15, 2027 EXPIRATION

WDC $550.00 Put

WDC270115P00550000

Latest saved OI229Oct 23, 2026
Last change-4vs previous saved observation
Saved market days7Oct 09, 2026 onwards
Daily open interest Hover a point for its date and OI
WDC $550.00 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. 2331160 2026-10-09: 228 OI2026-10-12: 227 OI2026-10-14: 227 OI2026-10-15: 227 OI2026-10-16: 227 OI2026-10-21: 233 OI2026-10-23: 229 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, 2026Viewing229-4
Oct 21, 2026233+6
Oct 16, 20262270
Oct 15, 20262270
Oct 14, 20262270
Oct 12, 2026227-1
Oct 09, 2026228No prior observation