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Contract OI history

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Oct 30, 2026 EXPIRATION

MSFT $537.50 Put

MSFT261030P00537500

Latest saved OI401Oct 23, 2026
Last change+7vs previous saved observation
Saved market days7Oct 09, 2026 onwards
Daily open interest Hover a point for its date and OI
MSFT $537.50 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. 4012000 2026-10-09: 0 OI2026-10-13: 132 OI2026-10-14: 132 OI2026-10-15: 240 OI2026-10-16: 348 OI2026-10-21: 394 OI2026-10-23: 401 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, 2026Viewing401+7
Oct 21, 2026394+46
Oct 16, 2026348+108
Oct 15, 2026240+108
Oct 14, 20261320
Oct 13, 2026132+132
Oct 09, 20260No prior observation