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Contract OI history

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Dec 18, 2026 EXPIRATION

MSFT $555.00 Put

MSFT261218P00555000

Latest saved OI163Oct 23, 2026
Last change-3vs previous saved observation
Saved market days7Oct 09, 2026 onwards
Daily open interest Hover a point for its date and OI
MSFT $555.00 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. 2081040 2026-10-09: 152 OI2026-10-13: 205 OI2026-10-14: 205 OI2026-10-15: 208 OI2026-10-16: 208 OI2026-10-21: 166 OI2026-10-23: 163 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, 2026Viewing163-3
Oct 21, 2026166-42
Oct 16, 20262080
Oct 15, 2026208+3
Oct 14, 20262050
Oct 13, 2026205+53
Oct 09, 2026152No prior observation