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Contract OI history

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Dec 18, 2026 EXPIRATION

MSFT $380.00 Put

MSFT261218P00380000

Latest saved OI5,509Oct 23, 2026
Last change-7vs previous saved observation
Saved market days7Oct 09, 2026 onwards
Daily open interest Hover a point for its date and OI
MSFT $380.00 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. 5,5532,7760 2026-10-09: 5,553 OI2026-10-13: 5,542 OI2026-10-14: 5,542 OI2026-10-15: 5,529 OI2026-10-16: 5,518 OI2026-10-21: 5,516 OI2026-10-23: 5,509 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, 2026Viewing5,509-7
Oct 21, 20265,516-2
Oct 16, 20265,518-11
Oct 15, 20265,529-13
Oct 14, 20265,5420
Oct 13, 20265,542-11
Oct 09, 20265,553No prior observation