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Contract OI history

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Sep 17, 2027 EXPIRATION

MSFT $430.00 Put

MSFT270917P00430000

Latest saved OI420Oct 23, 2026
Last change+14vs previous saved observation
Saved market days7Oct 09, 2026 onwards
Daily open interest Hover a point for its date and OI
MSFT $430.00 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. 4202100 2026-10-09: 403 OI2026-10-13: 403 OI2026-10-14: 403 OI2026-10-15: 403 OI2026-10-16: 403 OI2026-10-21: 406 OI2026-10-23: 420 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, 2026Viewing420+14
Oct 21, 2026406+3
Oct 16, 20264030
Oct 15, 20264030
Oct 14, 20264030
Oct 13, 20264030
Oct 09, 2026403No prior observation