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Contract OI history

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Jan 15, 2027 EXPIRATION

COST $780.00 Put

COST270115P00780000

Latest saved OI760Oct 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
COST $780.00 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. 7693840 2026-10-09: 769 OI2026-10-13: 769 OI2026-10-14: 769 OI2026-10-15: 768 OI2026-10-16: 769 OI2026-10-21: 765 OI2026-10-23: 760 OI Oct 09, 2026Oct 23, 2026

All saved dates are shown. Changes compare consecutive saved observations. Missing observations are not filled with zero.

COST contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 2026Viewing760-5
Oct 21, 2026765-4
Oct 16, 2026769+1
Oct 15, 2026768-1
Oct 14, 20267690
Oct 13, 20267690
Oct 09, 2026769No prior observation