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Contract OI history

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Nov 20, 2026 EXPIRATION

MSFT $420.00 Put

MSFT261120P00420000

Latest saved OI3,598Oct 23, 2026
Last change+23vs previous saved observation
Saved market days7Oct 09, 2026 onwards
Daily open interest Hover a point for its date and OI
MSFT $420.00 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. 3,6291,8140 2026-10-09: 2,889 OI2026-10-13: 2,848 OI2026-10-14: 2,848 OI2026-10-15: 2,806 OI2026-10-16: 3,629 OI2026-10-21: 3,575 OI2026-10-23: 3,598 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, 2026Viewing3,598+23
Oct 21, 20263,575-54
Oct 16, 20263,629+823
Oct 15, 20262,806-42
Oct 14, 20262,8480
Oct 13, 20262,848-41
Oct 09, 20262,889No prior observation