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Contract OI history

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Jan 21, 2028 EXPIRATION

MSFT $535.00 Put

MSFT280121P00535000

Latest saved OI759Oct 23, 2026
Last change+35vs previous saved observation
Saved market days7Oct 09, 2026 onwards
Daily open interest Hover a point for its date and OI
MSFT $535.00 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. 7593790 2026-10-09: 657 OI2026-10-13: 657 OI2026-10-14: 657 OI2026-10-15: 659 OI2026-10-16: 659 OI2026-10-21: 724 OI2026-10-23: 759 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, 2026Viewing759+35
Oct 21, 2026724+65
Oct 16, 20266590
Oct 15, 2026659+2
Oct 14, 20266570
Oct 13, 20266570
Oct 09, 2026657No prior observation