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Contract OI history

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Jun 17, 2027 EXPIRATION

MSFT $400.00 Put

MSFT270617P00400000

Latest saved OI6,350Oct 23, 2026
Last change+14vs previous saved observation
Saved market days7Oct 09, 2026 onwards
Daily open interest Hover a point for its date and OI
MSFT $400.00 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. 6,3503,1750 2026-10-09: 6,130 OI2026-10-13: 6,045 OI2026-10-14: 6,045 OI2026-10-15: 6,079 OI2026-10-16: 6,299 OI2026-10-21: 6,336 OI2026-10-23: 6,350 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, 2026Viewing6,350+14
Oct 21, 20266,336+37
Oct 16, 20266,299+220
Oct 15, 20266,079+34
Oct 14, 20266,0450
Oct 13, 20266,045-85
Oct 09, 20266,130No prior observation