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Contract OI history

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Oct 30, 2026 EXPIRATION

COST $865.00 Put

COST261030P00865000

Latest saved OI165Oct 23, 2026
Last change0vs previous saved observation
Saved market days7Oct 09, 2026 onwards
Daily open interest Hover a point for its date and OI
COST $865.00 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. 165820 2026-10-09: 123 OI2026-10-13: 123 OI2026-10-14: 123 OI2026-10-15: 122 OI2026-10-16: 122 OI2026-10-21: 165 OI2026-10-23: 165 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, 2026Viewing1650
Oct 21, 2026165+43
Oct 16, 20261220
Oct 15, 2026122-1
Oct 14, 20261230
Oct 13, 20261230
Oct 09, 2026123No prior observation