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Contract OI history

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Dec 18, 2026 EXPIRATION

MSFT $355.00 Put

MSFT261218P00355000

Latest saved OI1,564Oct 23, 2026
Last change-43vs previous saved observation
Saved market days7Oct 09, 2026 onwards
Daily open interest Hover a point for its date and OI
MSFT $355.00 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. 1,6078030 2026-10-09: 1,531 OI2026-10-13: 1,539 OI2026-10-14: 1,539 OI2026-10-15: 1,540 OI2026-10-16: 1,540 OI2026-10-21: 1,607 OI2026-10-23: 1,564 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, 2026Viewing1,564-43
Oct 21, 20261,607+67
Oct 16, 20261,5400
Oct 15, 20261,540+1
Oct 14, 20261,5390
Oct 13, 20261,539+8
Oct 09, 20261,531No prior observation