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Contract OI history

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Mar 19, 2027 EXPIRATION

MSFT $320.00 Put

MSFT270319P00320000

Latest saved OI6,565Oct 23, 2026
Last change-24vs 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. 6,5893,2940 2026-10-09: 6,574 OI2026-10-13: 6,575 OI2026-10-14: 6,575 OI2026-10-15: 6,577 OI2026-10-16: 6,578 OI2026-10-21: 6,589 OI2026-10-23: 6,565 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, 2026Viewing6,565-24
Oct 21, 20266,589+11
Oct 16, 20266,578+1
Oct 15, 20266,577+2
Oct 14, 20266,5750
Oct 13, 20266,575+1
Oct 09, 20266,574No prior observation