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Contract OI history

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Sep 17, 2027 EXPIRATION

MSFT $375.00 Put

MSFT270917P00375000

Latest saved OI261Oct 23, 2026
Last change-4vs previous saved observation
Saved market days7Oct 09, 2026 onwards
Daily open interest Hover a point for its date and OI
MSFT $375.00 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. 2711350 2026-10-09: 262 OI2026-10-13: 262 OI2026-10-14: 262 OI2026-10-15: 263 OI2026-10-16: 271 OI2026-10-21: 265 OI2026-10-23: 261 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, 2026Viewing261-4
Oct 21, 2026265-6
Oct 16, 2026271+8
Oct 15, 2026263+1
Oct 14, 20262620
Oct 13, 20262620
Oct 09, 2026262No prior observation