Put-Call Ratio (Volume) (10-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 10-Day Put-Call Ratio (Volume) of 0.8076 for 2026-08-20.

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Figures for 2026-08-20

Volatility Metrics
Historical Volatility (Close-to-Close)	0.1889
Historical Volatility (Parkinson)	0.1571
Implied Volatility (Calls)	0.2221
Implied Volatility (Puts)	0.2191
Implied Volatility (Mean)	0.2206
Put-Call Implied Volatility Ratio	0.9864
Implied Volatility Skew	--
Option Statistics
Put-Call Ratio (Volume)	0.8076
Put-Call Ratio (Open Interest)	1.4778