Put-Call Ratio (Open Interest) (30-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 30-Day Put-Call Ratio (Open Interest) of 0.6773 for 2025-10-16.

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Figures for 2025-10-16

Volatility Metrics
Historical Volatility (Close-to-Close)	0.2110
Historical Volatility (Parkinson)	0.1579
Implied Volatility (Calls)	0.2416
Implied Volatility (Puts)	0.2443
Implied Volatility (Mean)	0.2429
Put-Call Implied Volatility Ratio	1.0115
Implied Volatility Skew	0.0128
Option Statistics
Put-Call Ratio (Volume)	1.2696
Put-Call Ratio (Open Interest)	0.6773