Put-Call Ratio (Volume) (20-Day)

Put-Call Ratio (Volume): The ratio of puts traded to calls traded, for options with the relevant expiration date.

Costco Wholesale Corporation (COST) had 20-Day Put-Call Ratio (Volume) of 1.0572 for 2025-10-16.

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Figures for 2025-10-16

Volatility Metrics
Historical Volatility (Close-to-Close)	0.2218
Historical Volatility (Parkinson)	0.1654
Implied Volatility (Calls)	0.2469
Implied Volatility (Puts)	0.2470
Implied Volatility (Mean)	0.2469
Put-Call Implied Volatility Ratio	1.0005
Implied Volatility Skew	-0.0062
Option Statistics
Put-Call Ratio (Volume)	1.0572
Put-Call Ratio (Open Interest)	1.2120