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Contract OI history

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Dec 18, 2026 EXPIRATION

MSFT $440.00 Put

MSFT261218P00440000

Latest saved OI4,226Oct 23, 2026
Last change+45vs previous saved observation
Saved market days7Oct 09, 2026 onwards
Daily open interest Hover a point for its date and OI
MSFT $440.00 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. 4,6412,3200 2026-10-09: 4,641 OI2026-10-13: 4,634 OI2026-10-14: 4,634 OI2026-10-15: 4,635 OI2026-10-16: 4,058 OI2026-10-21: 4,181 OI2026-10-23: 4,226 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, 2026Viewing4,226+45
Oct 21, 20264,181+123
Oct 16, 20264,058-577
Oct 15, 20264,635+1
Oct 14, 20264,6340
Oct 13, 20264,634-7
Oct 09, 20264,641No prior observation