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Contract OI history

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Dec 18, 2026 EXPIRATION

MSFT $275.00 Put

MSFT261218P00275000

Latest saved OI2,443Oct 23, 2026
Last change+55vs previous saved observation
Saved market days7Oct 09, 2026 onwards
Daily open interest Hover a point for its date and OI
MSFT $275.00 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. 2,4431,2210 2026-10-09: 2,385 OI2026-10-13: 2,385 OI2026-10-14: 2,385 OI2026-10-15: 2,385 OI2026-10-16: 2,387 OI2026-10-21: 2,388 OI2026-10-23: 2,443 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, 2026Viewing2,443+55
Oct 21, 20262,388+1
Oct 16, 20262,387+2
Oct 15, 20262,3850
Oct 14, 20262,3850
Oct 13, 20262,3850
Oct 09, 20262,385No prior observation