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Contract OI history

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Oct 23, 2026 EXPIRATION

MSFT $400.00 Put

MSFT261023P00400000

Latest saved OI552Oct 23, 2026
Last change0vs previous saved observation
Saved market days7Oct 09, 2026 onwards
Daily open interest Hover a point for its date and OI
MSFT $400.00 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. 5522760 2026-10-09: 537 OI2026-10-13: 532 OI2026-10-14: 532 OI2026-10-15: 521 OI2026-10-16: 521 OI2026-10-21: 552 OI2026-10-23: 552 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, 2026Viewing5520
Oct 21, 2026552+31
Oct 16, 20265210
Oct 15, 2026521-11
Oct 14, 20265320
Oct 13, 2026532-5
Oct 09, 2026537No prior observation