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Contract OI history

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Dec 15, 2028 EXPIRATION

MSFT $520.00 Put

MSFT281215P00520000

Latest saved OI406Oct 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 $520.00 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. 4092040 2026-10-09: 409 OI2026-10-13: 409 OI2026-10-14: 409 OI2026-10-15: 408 OI2026-10-16: 408 OI2026-10-21: 407 OI2026-10-23: 406 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, 2026Viewing406-1
Oct 21, 2026407-1
Oct 16, 20264080
Oct 15, 2026408-1
Oct 14, 20264090
Oct 13, 20264090
Oct 09, 2026409No prior observation