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Contract OI history

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Dec 15, 2028 EXPIRATION

MSFT $420.00 Put

MSFT281215P00420000

Latest saved OI646Oct 23, 2026
Last change-31vs 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. 6783390 2026-10-09: 678 OI2026-10-13: 678 OI2026-10-14: 678 OI2026-10-15: 678 OI2026-10-16: 677 OI2026-10-21: 677 OI2026-10-23: 646 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, 2026Viewing646-31
Oct 21, 20266770
Oct 16, 2026677-1
Oct 15, 20266780
Oct 14, 20266780
Oct 13, 20266780
Oct 09, 2026678No prior observation