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Contract OI history

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Jan 21, 2028 EXPIRATION

MSFT $310.00 Put

MSFT280121P00310000

Latest saved OI1,078Oct 23, 2026
Last change+2vs previous saved observation
Saved market days7Oct 09, 2026 onwards
Daily open interest Hover a point for its date and OI
MSFT $310.00 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. 1,0785390 2026-10-09: 902 OI2026-10-13: 902 OI2026-10-14: 902 OI2026-10-15: 926 OI2026-10-16: 944 OI2026-10-21: 1,076 OI2026-10-23: 1,078 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, 2026Viewing1,078+2
Oct 21, 20261,076+132
Oct 16, 2026944+18
Oct 15, 2026926+24
Oct 14, 20269020
Oct 13, 20269020
Oct 09, 2026902No prior observation