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Contract OI history

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Nov 20, 2026 EXPIRATION

MSFT $400.00 Put

MSFT261120P00400000

Latest saved OI6,426Oct 23, 2026
Last change+171vs 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. 6,4263,2130 2026-10-09: 5,752 OI2026-10-13: 5,728 OI2026-10-14: 5,728 OI2026-10-15: 5,810 OI2026-10-16: 6,192 OI2026-10-21: 6,255 OI2026-10-23: 6,426 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, 2026Viewing6,426+171
Oct 21, 20266,255+63
Oct 16, 20266,192+382
Oct 15, 20265,810+82
Oct 14, 20265,7280
Oct 13, 20265,728-24
Oct 09, 20265,752No prior observation