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Contract OI history

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Dec 18, 2026 EXPIRATION

MSFT $320.00 Put

MSFT261218P00320000

Latest saved OI6,996Oct 23, 2026
Last change+72vs previous saved observation
Saved market days7Oct 09, 2026 onwards
Daily open interest Hover a point for its date and OI
MSFT $320.00 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. 6,9963,4980 2026-10-09: 6,958 OI2026-10-13: 6,958 OI2026-10-14: 6,958 OI2026-10-15: 6,959 OI2026-10-16: 6,959 OI2026-10-21: 6,924 OI2026-10-23: 6,996 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, 2026Viewing6,996+72
Oct 21, 20266,924-35
Oct 16, 20266,9590
Oct 15, 20266,959+1
Oct 14, 20266,9580
Oct 13, 20266,9580
Oct 09, 20266,958No prior observation