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Contract OI history

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Jan 21, 2028 EXPIRATION

MSFT $350.00 Put

MSFT280121P00350000

Latest saved OI4,560Oct 23, 2026
Last change+10vs previous saved observation
Saved market days7Oct 09, 2026 onwards
Daily open interest Hover a point for its date and OI
MSFT $350.00 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. 4,6372,3180 2026-10-09: 4,637 OI2026-10-13: 4,520 OI2026-10-14: 4,520 OI2026-10-15: 4,537 OI2026-10-16: 4,539 OI2026-10-21: 4,550 OI2026-10-23: 4,560 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, 2026Viewing4,560+10
Oct 21, 20264,550+11
Oct 16, 20264,539+2
Oct 15, 20264,537+17
Oct 14, 20264,5200
Oct 13, 20264,520-117
Oct 09, 20264,637No prior observation