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Contract OI history

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Dec 18, 2026 EXPIRATION

MSFT $495.00 Put

MSFT261218P00495000

Latest saved OI4,651Oct 23, 2026
Last change+1,459vs previous saved observation
Saved market days7Oct 09, 2026 onwards
Daily open interest Hover a point for its date and OI
MSFT $495.00 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. 4,6512,3250 2026-10-09: 1,581 OI2026-10-13: 1,582 OI2026-10-14: 1,582 OI2026-10-15: 1,606 OI2026-10-16: 1,619 OI2026-10-21: 3,192 OI2026-10-23: 4,651 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, 2026Viewing4,651+1,459
Oct 21, 20263,192+1,573
Oct 16, 20261,619+13
Oct 15, 20261,606+24
Oct 14, 20261,5820
Oct 13, 20261,582+1
Oct 09, 20261,581No prior observation