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Contract OI history

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Dec 18, 2026 EXPIRATION

MSFT $540.00 Put

MSFT261218P00540000

Latest saved OI2,408Oct 23, 2026
Last change+24vs previous saved observation
Saved market days7Oct 09, 2026 onwards
Daily open interest Hover a point for its date and OI
MSFT $540.00 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. 2,4081,2040 2026-10-09: 1,066 OI2026-10-13: 1,970 OI2026-10-14: 1,970 OI2026-10-15: 2,008 OI2026-10-16: 1,991 OI2026-10-21: 2,384 OI2026-10-23: 2,408 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, 2026Viewing2,408+24
Oct 21, 20262,384+393
Oct 16, 20261,991-17
Oct 15, 20262,008+38
Oct 14, 20261,9700
Oct 13, 20261,970+904
Oct 09, 20261,066No prior observation