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Contract OI history

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Mar 19, 2027 EXPIRATION

MSFT $550.00 Put

MSFT270319P00550000

Latest saved OI1,076Oct 23, 2026
Last change+32vs previous saved observation
Saved market days7Oct 09, 2026 onwards
Daily open interest Hover a point for its date and OI
MSFT $550.00 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. 1,0765380 2026-10-09: 911 OI2026-10-13: 1,000 OI2026-10-14: 1,000 OI2026-10-15: 1,012 OI2026-10-16: 1,037 OI2026-10-21: 1,044 OI2026-10-23: 1,076 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, 2026Viewing1,076+32
Oct 21, 20261,044+7
Oct 16, 20261,037+25
Oct 15, 20261,012+12
Oct 14, 20261,0000
Oct 13, 20261,000+89
Oct 09, 2026911No prior observation