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Contract OI history

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Dec 18, 2026 EXPIRATION

MSFT $500.00 Put

MSFT261218P00500000

Latest saved OI8,538Oct 23, 2026
Last change+1,219vs previous saved observation
Saved market days7Oct 09, 2026 onwards
Daily open interest Hover a point for its date and OI
MSFT $500.00 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. 8,5384,2690 2026-10-09: 6,928 OI2026-10-13: 6,974 OI2026-10-14: 6,974 OI2026-10-15: 7,094 OI2026-10-16: 7,118 OI2026-10-21: 7,319 OI2026-10-23: 8,538 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, 2026Viewing8,538+1,219
Oct 21, 20267,319+201
Oct 16, 20267,118+24
Oct 15, 20267,094+120
Oct 14, 20266,9740
Oct 13, 20266,974+46
Oct 09, 20266,928No prior observation