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Contract OI history

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Jun 17, 2027 EXPIRATION

WDC $400.00 Put

WDC270617P00400000

Latest saved OI404Oct 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. 4112050 2026-10-09: 387 OI2026-10-12: 399 OI2026-10-14: 400 OI2026-10-15: 411 OI2026-10-16: 383 OI2026-10-21: 393 OI2026-10-23: 404 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, 2026Viewing404+11
Oct 21, 2026393+10
Oct 16, 2026383-28
Oct 15, 2026411+11
Oct 14, 2026400+1
Oct 12, 2026399+12
Oct 09, 2026387No prior observation