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Contract OI history

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Nov 20, 2026 EXPIRATION

COST $1020.00 Put

COST261120P01020000

Latest saved OI131Oct 23, 2026
Last change+7vs previous saved observation
Saved market days7Oct 09, 2026 onwards
Daily open interest Hover a point for its date and OI
COST $1020.00 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. 144720 2026-10-09: 140 OI2026-10-13: 140 OI2026-10-14: 140 OI2026-10-15: 140 OI2026-10-16: 144 OI2026-10-21: 124 OI2026-10-23: 131 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, 2026Viewing131+7
Oct 21, 2026124-20
Oct 16, 2026144+4
Oct 15, 20261400
Oct 14, 20261400
Oct 13, 20261400
Oct 09, 2026140No prior observation