Put-Call Ratio (Open Interest) (20-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.

McKesson Corporation (MCK) had 20-Day Put-Call Ratio (Open Interest) of 0.3717 for 2025-05-21.

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Figures for 2025-05-21

Volatility Metrics
Historical Volatility (Close-to-Close)	0.2935
Historical Volatility (Parkinson)	0.2775
Implied Volatility (Calls)	0.2442
Implied Volatility (Puts)	0.2425
Implied Volatility (Mean)	0.2433
Put-Call Implied Volatility Ratio	0.9931
Implied Volatility Skew	0.0383
Option Statistics
Put-Call Ratio (Volume)	0.3529
Put-Call Ratio (Open Interest)	0.3717