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Contract OI history

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Oct 26, 2026 EXPIRATION

MSFT $517.50 Put

MSFT261026P00517500

Latest saved OI594Oct 23, 2026
Last change+538vs previous saved observation
Saved market days6Oct 13, 2026 onwards
Daily open interest Hover a point for its date and OI
MSFT $517.50 put open interest history 6 saved observations from 2026-10-13 to 2026-10-23. Exact values and changes are listed in the table below. 5942970 2026-10-13: 3 OI2026-10-14: 3 OI2026-10-15: 7 OI2026-10-16: 9 OI2026-10-21: 56 OI2026-10-23: 594 OI Oct 13, 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, 2026Viewing594+538
Oct 21, 202656+47
Oct 16, 20269+2
Oct 15, 20267+4
Oct 14, 202630
Oct 13, 20263No prior observation