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Contract OI history

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Oct 30, 2026 EXPIRATION

MSFT $520.00 Put

MSFT261030P00520000

Latest saved OI1,608Oct 23, 2026
Last change+266vs 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. 1,6088040 2026-10-09: 598 OI2026-10-13: 746 OI2026-10-14: 746 OI2026-10-15: 847 OI2026-10-16: 850 OI2026-10-21: 1,342 OI2026-10-23: 1,608 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, 2026Viewing1,608+266
Oct 21, 20261,342+492
Oct 16, 2026850+3
Oct 15, 2026847+101
Oct 14, 20267460
Oct 13, 2026746+148
Oct 09, 2026598No prior observation