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Contract OI history

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Jun 16, 2028 EXPIRATION

MSFT $400.00 Put

MSFT280616P00400000

Latest saved OI750Oct 23, 2026
Last change+79vs 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. 7503750 2026-10-09: 702 OI2026-10-13: 694 OI2026-10-14: 694 OI2026-10-15: 693 OI2026-10-16: 680 OI2026-10-21: 671 OI2026-10-23: 750 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, 2026Viewing750+79
Oct 21, 2026671-9
Oct 16, 2026680-13
Oct 15, 2026693-1
Oct 14, 20266940
Oct 13, 2026694-8
Oct 09, 2026702No prior observation