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Contract OI history

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Apr 16, 2027 EXPIRATION

MSFT $400.00 Put

MSFT270416P00400000

Latest saved OI650Oct 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 $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. 6503250 2026-10-09: 148 OI2026-10-13: 619 OI2026-10-14: 619 OI2026-10-15: 625 OI2026-10-16: 631 OI2026-10-21: 646 OI2026-10-23: 650 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, 2026Viewing650+4
Oct 21, 2026646+15
Oct 16, 2026631+6
Oct 15, 2026625+6
Oct 14, 20266190
Oct 13, 2026619+471
Oct 09, 2026148No prior observation