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Contract OI history

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Mar 19, 2027 EXPIRATION

MSFT $340.00 Put

MSFT270319P00340000

Latest saved OI2,649Oct 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 $340.00 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. 2,6801,3400 2026-10-09: 2,574 OI2026-10-13: 2,572 OI2026-10-14: 2,572 OI2026-10-15: 2,571 OI2026-10-16: 2,572 OI2026-10-21: 2,680 OI2026-10-23: 2,649 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, 2026Viewing2,649-31
Oct 21, 20262,680+108
Oct 16, 20262,572+1
Oct 15, 20262,571-1
Oct 14, 20262,5720
Oct 13, 20262,572-2
Oct 09, 20262,574No prior observation