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Contract OI history

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Dec 17, 2027 EXPIRATION

MSFT $420.00 Put

MSFT271217P00420000

Latest saved OI1,677Oct 23, 2026
Last change+5vs previous saved observation
Saved market days7Oct 09, 2026 onwards
Daily open interest Hover a point for its date and OI
MSFT $420.00 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. 1,6778380 2026-10-09: 1,263 OI2026-10-13: 1,273 OI2026-10-14: 1,273 OI2026-10-15: 1,272 OI2026-10-16: 1,271 OI2026-10-21: 1,672 OI2026-10-23: 1,677 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, 2026Viewing1,677+5
Oct 21, 20261,672+401
Oct 16, 20261,271-1
Oct 15, 20261,272-1
Oct 14, 20261,2730
Oct 13, 20261,273+10
Oct 09, 20261,263No prior observation