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Contract OI history

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Jan 15, 2027 EXPIRATION

MSFT $505.00 Put

MSFT270115P00505000

Latest saved OI1,876Oct 23, 2026
Last change+343vs 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. 1,8769380 2026-10-09: 1,235 OI2026-10-13: 1,263 OI2026-10-14: 1,263 OI2026-10-15: 1,280 OI2026-10-16: 1,317 OI2026-10-21: 1,533 OI2026-10-23: 1,876 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, 2026Viewing1,876+343
Oct 21, 20261,533+216
Oct 16, 20261,317+37
Oct 15, 20261,280+17
Oct 14, 20261,2630
Oct 13, 20261,263+28
Oct 09, 20261,235No prior observation