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Contract OI history

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Dec 18, 2026 EXPIRATION

MSFT $645.00 Call

MSFT261218C00645000

Latest saved OI390Oct 23, 2026
Last change+12vs previous saved observation
Saved market days7Oct 09, 2026 onwards
Daily open interest Hover a point for its date and OI
MSFT $645.00 call open interest history 7 saved observations from 2026-10-09 to 2026-10-23. Exact values and changes are listed in the table below. 3901950 2026-10-09: 272 OI2026-10-13: 334 OI2026-10-14: 334 OI2026-10-15: 334 OI2026-10-16: 327 OI2026-10-21: 378 OI2026-10-23: 390 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, 2026Viewing390+12
Oct 21, 2026378+51
Oct 16, 2026327-7
Oct 15, 20263340
Oct 14, 20263340
Oct 13, 2026334+62
Oct 09, 2026272No prior observation