Put-Call Ratio (Open Interest) (10-Day)

Put-Call Ratio (Open Interest): The ratio of outstanding put contracts to outstanding call contracts at the close of the trading day, for options with the relevant expiration date.

Costco Wholesale Corporation (COST) had 10-Day Put-Call Ratio (Open Interest) of 0.8132 for 2025-12-17.

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Figures for 2025-12-17

Volatility Metrics
Historical Volatility (Close-to-Close)	0.1937
Historical Volatility (Parkinson)	0.2098
Implied Volatility (Calls)	0.1898
Implied Volatility (Puts)	0.1897
Implied Volatility (Mean)	0.1898
Put-Call Implied Volatility Ratio	0.9995
Implied Volatility Skew	0.0264
Option Statistics
Put-Call Ratio (Volume)	0.4427
Put-Call Ratio (Open Interest)	0.8132