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Contract OI history

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Jun 17, 2027 EXPIRATION

MSFT $550.00 Put

MSFT270617P00550000

Latest saved OI575Oct 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 $550.00 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. 5782890 2026-10-09: 520 OI2026-10-13: 571 OI2026-10-14: 571 OI2026-10-15: 573 OI2026-10-16: 573 OI2026-10-21: 578 OI2026-10-23: 575 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, 2026Viewing575-3
Oct 21, 2026578+5
Oct 16, 20265730
Oct 15, 2026573+2
Oct 14, 20265710
Oct 13, 2026571+51
Oct 09, 2026520No prior observation