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Contract OI history

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Dec 18, 2026 EXPIRATION

MDB $320.00 Put

MDB261218P00320000

Latest saved OI324Oct 23, 2026
Last change-2vs previous saved observation
Saved market days7Oct 09, 2026 onwards
Daily open interest Hover a point for its date and OI
MDB $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. 3451720 2026-10-09: 263 OI2026-10-13: 262 OI2026-10-14: 262 OI2026-10-15: 345 OI2026-10-16: 341 OI2026-10-21: 326 OI2026-10-23: 324 OI Oct 09, 2026Oct 23, 2026

All saved dates are shown. Changes compare consecutive saved observations. Missing observations are not filled with zero.

MDB contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 2026324-2
Oct 21, 2026Viewing326-15
Oct 16, 2026341-4
Oct 15, 2026345+83
Oct 14, 20262620
Oct 13, 2026262-1
Oct 09, 2026263No prior observation