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Contract OI history

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Dec 18, 2026 EXPIRATION

WDC $340.00 Put

WDC261218P00340000

Latest saved OI345Oct 23, 2026
Last change+17vs 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. 3451720 2026-10-09: 257 OI2026-10-12: 256 OI2026-10-14: 278 OI2026-10-15: 283 OI2026-10-16: 330 OI2026-10-21: 328 OI2026-10-23: 345 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, 2026Viewing345+17
Oct 21, 2026328-2
Oct 16, 2026330+47
Oct 15, 2026283+5
Oct 14, 2026278+22
Oct 12, 2026256-1
Oct 09, 2026257No prior observation