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Contract OI history

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Dec 18, 2026 EXPIRATION

MSFT $280.00 Put

MSFT261218P00280000

Latest saved OI2,187Oct 23, 2026
Last change+19vs previous saved observation
Saved market days7Oct 09, 2026 onwards
Daily open interest Hover a point for its date and OI
MSFT $280.00 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. 2,1871,0930 2026-10-09: 2,166 OI2026-10-13: 2,166 OI2026-10-14: 2,166 OI2026-10-15: 2,166 OI2026-10-16: 2,168 OI2026-10-21: 2,168 OI2026-10-23: 2,187 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, 2026Viewing2,187+19
Oct 21, 20262,1680
Oct 16, 20262,168+2
Oct 15, 20262,1660
Oct 14, 20262,1660
Oct 13, 20262,1660
Oct 09, 20262,166No prior observation