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Contract OI history

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Dec 18, 2026 EXPIRATION

MSFT $340.00 Put

MSFT261218P00340000

Latest saved OI3,145Oct 23, 2026
Last change0vs 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. 3,1931,5960 2026-10-09: 3,193 OI2026-10-13: 3,094 OI2026-10-14: 3,094 OI2026-10-15: 3,135 OI2026-10-16: 3,136 OI2026-10-21: 3,145 OI2026-10-23: 3,145 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, 2026Viewing3,1450
Oct 21, 20263,145+9
Oct 16, 20263,136+1
Oct 15, 20263,135+41
Oct 14, 20263,0940
Oct 13, 20263,094-99
Oct 09, 20263,193No prior observation