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Contract OI history

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Nov 20, 2026 EXPIRATION

MSFT $280.00 Put

MSFT261120P00280000

Latest saved OI2,928Oct 23, 2026
Last change-1vs 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. 2,9291,4640 2026-10-09: 2,359 OI2026-10-13: 2,524 OI2026-10-14: 2,524 OI2026-10-15: 2,526 OI2026-10-16: 2,529 OI2026-10-21: 2,929 OI2026-10-23: 2,928 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, 2026Viewing2,928-1
Oct 21, 20262,929+400
Oct 16, 20262,529+3
Oct 15, 20262,526+2
Oct 14, 20262,5240
Oct 13, 20262,524+165
Oct 09, 20262,359No prior observation