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Contract OI history

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Nov 20, 2026 EXPIRATION

MSFT $505.00 Put

MSFT261120P00505000

Latest saved OI2,181Oct 23, 2026
Last change+291vs 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. 2,2971,1480 2026-10-09: 2,040 OI2026-10-13: 2,246 OI2026-10-14: 2,246 OI2026-10-15: 2,297 OI2026-10-16: 1,799 OI2026-10-21: 1,890 OI2026-10-23: 2,181 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, 2026Viewing2,181+291
Oct 21, 20261,890+91
Oct 16, 20261,799-498
Oct 15, 20262,297+51
Oct 14, 20262,2460
Oct 13, 20262,246+206
Oct 09, 20262,040No prior observation