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Contract OI history

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Dec 17, 2027 EXPIRATION

MSFT $540.00 Put

MSFT271217P00540000

Latest saved OI812Oct 23, 2026
Last change+2vs previous saved observation
Saved market days7Oct 09, 2026 onwards
Daily open interest Hover a point for its date and OI
MSFT $540.00 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. 8124060 2026-10-09: 768 OI2026-10-13: 772 OI2026-10-14: 772 OI2026-10-15: 772 OI2026-10-16: 772 OI2026-10-21: 810 OI2026-10-23: 812 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, 2026Viewing812+2
Oct 21, 2026810+38
Oct 16, 20267720
Oct 15, 20267720
Oct 14, 20267720
Oct 13, 2026772+4
Oct 09, 2026768No prior observation