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.

Kaiser Aluminum Corporation (KALU) had 20-Day Put-Call Ratio (Open Interest) of 1.4444 for 2026-01-16.

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Figures for 2026-01-16

Volatility Metrics
Historical Volatility (Close-to-Close)	0.3077
Historical Volatility (Parkinson)	0.3140
Implied Volatility (Calls)	0.3894
Implied Volatility (Puts)	0.3791
Implied Volatility (Mean)	0.3843
Put-Call Implied Volatility Ratio	0.9737
Implied Volatility Skew	0.0484
Option Statistics
Put-Call Ratio (Volume)	0.0000
Put-Call Ratio (Open Interest)	1.4444