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Contract OI history

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Oct 23, 2026 EXPIRATION

MSFT $517.50 Put

MSFT261023P00517500

Latest saved OI1,781Oct 23, 2026
Last change+721vs previous saved observation
Saved market days7Oct 09, 2026 onwards
Daily open interest Hover a point for its date and OI
MSFT $517.50 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. 1,7818900 2026-10-09: 119 OI2026-10-13: 234 OI2026-10-14: 234 OI2026-10-15: 357 OI2026-10-16: 422 OI2026-10-21: 1,060 OI2026-10-23: 1,781 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, 2026Viewing1,781+721
Oct 21, 20261,060+638
Oct 16, 2026422+65
Oct 15, 2026357+123
Oct 14, 20262340
Oct 13, 2026234+115
Oct 09, 2026119No prior observation