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Contract OI history

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Dec 18, 2026 EXPIRATION

MSFT $505.00 Put

MSFT261218P00505000

Latest saved OI1,801Oct 23, 2026
Last change-83vs previous saved observation
Saved market days7Oct 09, 2026 onwards
Daily open interest Hover a point for its date and OI
MSFT $505.00 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. 1,8849420 2026-10-09: 1,212 OI2026-10-13: 1,298 OI2026-10-14: 1,298 OI2026-10-15: 1,338 OI2026-10-16: 1,351 OI2026-10-21: 1,884 OI2026-10-23: 1,801 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, 2026Viewing1,801-83
Oct 21, 20261,884+533
Oct 16, 20261,351+13
Oct 15, 20261,338+40
Oct 14, 20261,2980
Oct 13, 20261,298+86
Oct 09, 20261,212No prior observation