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Contract OI history

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Oct 23, 2026 EXPIRATION

MSFT $527.50 Put

MSFT261023P00527500

Latest saved OI1,808Oct 23, 2026
Last change+557vs previous saved observation
Saved market days7Oct 09, 2026 onwards
Daily open interest Hover a point for its date and OI
MSFT $527.50 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. 1,8089040 2026-10-09: 109 OI2026-10-13: 279 OI2026-10-14: 279 OI2026-10-15: 381 OI2026-10-16: 423 OI2026-10-21: 1,251 OI2026-10-23: 1,808 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, 2026Viewing1,808+557
Oct 21, 20261,251+828
Oct 16, 2026423+42
Oct 15, 2026381+102
Oct 14, 20262790
Oct 13, 2026279+170
Oct 09, 2026109No prior observation