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Contract OI history

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Sep 17, 2027 EXPIRATION

MSFT $390.00 Put

MSFT270917P00390000

Latest saved OI619Oct 23, 2026
Last change+6vs previous saved observation
Saved market days7Oct 09, 2026 onwards
Daily open interest Hover a point for its date and OI
MSFT $390.00 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. 6193090 2026-10-09: 568 OI2026-10-13: 566 OI2026-10-14: 566 OI2026-10-15: 567 OI2026-10-16: 567 OI2026-10-21: 613 OI2026-10-23: 619 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, 2026Viewing619+6
Oct 21, 2026613+46
Oct 16, 20265670
Oct 15, 2026567+1
Oct 14, 20265660
Oct 13, 2026566-2
Oct 09, 2026568No prior observation