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Contract OI history

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Oct 23, 2026 EXPIRATION

MSFT $522.50 Put

MSFT261023P00522500

Latest saved OI3,774Oct 23, 2026
Last change+1,008vs previous saved observation
Saved market days7Oct 09, 2026 onwards
Daily open interest Hover a point for its date and OI
MSFT $522.50 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. 3,7741,8870 2026-10-09: 126 OI2026-10-13: 512 OI2026-10-14: 512 OI2026-10-15: 650 OI2026-10-16: 1,132 OI2026-10-21: 2,766 OI2026-10-23: 3,774 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, 2026Viewing3,774+1,008
Oct 21, 20262,766+1,634
Oct 16, 20261,132+482
Oct 15, 2026650+138
Oct 14, 20265120
Oct 13, 2026512+386
Oct 09, 2026126No prior observation