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Contract OI history

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Mar 19, 2027 EXPIRATION

WDC $320.00 Put

WDC270319P00320000

Latest saved OI262Oct 23, 2026
Last change+10vs previous saved observation
Saved market days7Oct 09, 2026 onwards
Daily open interest Hover a point for its date and OI
WDC $320.00 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. 2621310 2026-10-09: 237 OI2026-10-12: 237 OI2026-10-14: 231 OI2026-10-15: 232 OI2026-10-16: 246 OI2026-10-21: 252 OI2026-10-23: 262 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, 2026Viewing262+10
Oct 21, 2026252+6
Oct 16, 2026246+14
Oct 15, 2026232+1
Oct 14, 2026231-6
Oct 12, 20262370
Oct 09, 2026237No prior observation