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Contract OI history

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Jan 21, 2028 EXPIRATION

MSFT $370.00 Put

MSFT280121P00370000

Latest saved OI3,490Oct 23, 2026
Last change-50vs previous saved observation
Saved market days7Oct 09, 2026 onwards
Daily open interest Hover a point for its date and OI
MSFT $370.00 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. 3,5401,7700 2026-10-09: 1,433 OI2026-10-13: 2,537 OI2026-10-14: 2,537 OI2026-10-15: 2,526 OI2026-10-16: 2,526 OI2026-10-21: 3,540 OI2026-10-23: 3,490 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, 2026Viewing3,490-50
Oct 21, 20263,540+1,014
Oct 16, 20262,5260
Oct 15, 20262,526-11
Oct 14, 20262,5370
Oct 13, 20262,537+1,104
Oct 09, 20261,433No prior observation