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Contract OI history

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Oct 30, 2026 EXPIRATION

MSFT $400.00 Put

MSFT261030P00400000

Latest saved OI1,825Oct 23, 2026
Last change+454vs 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. 1,8259120 2026-10-09: 1,313 OI2026-10-13: 1,341 OI2026-10-14: 1,341 OI2026-10-15: 1,361 OI2026-10-16: 1,352 OI2026-10-21: 1,371 OI2026-10-23: 1,825 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, 2026Viewing1,825+454
Oct 21, 20261,371+19
Oct 16, 20261,352-9
Oct 15, 20261,361+20
Oct 14, 20261,3410
Oct 13, 20261,341+28
Oct 09, 20261,313No prior observation