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Contract OI history

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Dec 18, 2026 EXPIRATION

MDB $400.00 Put

MDB261218P00400000

Latest saved OI287Oct 23, 2026
Last change+20vs previous saved observation
Saved market days7Oct 09, 2026 onwards
Daily open interest Hover a point for its date and OI
MDB $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. 2871430 2026-10-09: 259 OI2026-10-13: 272 OI2026-10-14: 272 OI2026-10-15: 262 OI2026-10-16: 262 OI2026-10-21: 267 OI2026-10-23: 287 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, 2026287+20
Oct 21, 2026Viewing267+5
Oct 16, 20262620
Oct 15, 2026262-10
Oct 14, 20262720
Oct 13, 2026272+13
Oct 09, 2026259No prior observation