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Contract OI history

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Jan 19, 2029 EXPIRATION

MSFT $400.00 Put

MSFT290119P00400000

Latest saved OI289Oct 23, 2026
Last change+3vs previous saved observation
Saved market days7Oct 09, 2026 onwards
Daily open interest Hover a point for its date and OI
MSFT $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. 3051520 2026-10-09: 305 OI2026-10-13: 291 OI2026-10-14: 291 OI2026-10-15: 291 OI2026-10-16: 290 OI2026-10-21: 286 OI2026-10-23: 289 OI Oct 09, 2026Oct 23, 2026

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

MSFT contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 2026Viewing289+3
Oct 21, 2026286-4
Oct 16, 2026290-1
Oct 15, 20262910
Oct 14, 20262910
Oct 13, 2026291-14
Oct 09, 2026305No prior observation