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Contract OI history

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Nov 06, 2026 EXPIRATION

COST $840.00 Put

COST261106P00840000

Latest saved OI60Oct 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 $840.00 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. 79390 2026-10-09: 79 OI2026-10-13: 78 OI2026-10-14: 78 OI2026-10-15: 78 OI2026-10-16: 55 OI2026-10-21: 55 OI2026-10-23: 60 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, 2026Viewing60+5
Oct 21, 2026550
Oct 16, 202655-23
Oct 15, 2026780
Oct 14, 2026780
Oct 13, 202678-1
Oct 09, 202679No prior observation