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Contract OI history

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Dec 15, 2028 EXPIRATION

MSFT $550.00 Put

MSFT281215P00550000

Latest saved OI828Oct 23, 2026
Last change+23vs previous saved observation
Saved market days7Oct 09, 2026 onwards
Daily open interest Hover a point for its date and OI
MSFT $550.00 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. 8284140 2026-10-09: 799 OI2026-10-13: 798 OI2026-10-14: 798 OI2026-10-15: 797 OI2026-10-16: 797 OI2026-10-21: 805 OI2026-10-23: 828 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, 2026Viewing828+23
Oct 21, 2026805+8
Oct 16, 20267970
Oct 15, 2026797-1
Oct 14, 20267980
Oct 13, 2026798-1
Oct 09, 2026799No prior observation