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Contract OI history

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Jan 15, 2027 EXPIRATION

MSFT $440.00 Put

MSFT270115P00440000

Latest saved OI4,379Oct 23, 2026
Last change+166vs 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. 4,3792,1890 2026-10-09: 4,340 OI2026-10-13: 4,262 OI2026-10-14: 4,262 OI2026-10-15: 4,251 OI2026-10-16: 4,248 OI2026-10-21: 4,213 OI2026-10-23: 4,379 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, 2026Viewing4,379+166
Oct 21, 20264,213-35
Oct 16, 20264,248-3
Oct 15, 20264,251-11
Oct 14, 20264,2620
Oct 13, 20264,262-78
Oct 09, 20264,340No prior observation