Put-Call Ratio (Open Interest) (180-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 180-Day Put-Call Ratio (Open Interest) of 0.8176 for 2026-04-06.

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Figures for 2026-04-06

Volatility Metrics
Historical Volatility (Close-to-Close)	0.1925
Historical Volatility (Parkinson)	0.1796
Implied Volatility (Calls)	0.2487
Implied Volatility (Puts)	0.2467
Implied Volatility (Mean)	0.2477
Put-Call Implied Volatility Ratio	0.9919
Implied Volatility Skew	0.0292
Option Statistics
Put-Call Ratio (Volume)	1.3490
Put-Call Ratio (Open Interest)	0.8176