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Contract OI history

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Dec 17, 2027 EXPIRATION

MSFT $520.00 Put

MSFT271217P00520000

Latest saved OI535Oct 23, 2026
Last change+10vs 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. 5352670 2026-10-09: 525 OI2026-10-13: 526 OI2026-10-14: 526 OI2026-10-15: 525 OI2026-10-16: 525 OI2026-10-21: 525 OI2026-10-23: 535 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, 2026Viewing535+10
Oct 21, 20265250
Oct 16, 20265250
Oct 15, 2026525-1
Oct 14, 20265260
Oct 13, 2026526+1
Oct 09, 2026525No prior observation