Put-Call Ratio (Volume) (180-Day)

Put-Call Ratio (Volume): The ratio of puts traded to calls traded, for options with the relevant expiration date.

NL Industries, Inc. (NL) 180-Day Put-Call Ratio (Volume) data is not available for 2026-04-21.

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Figures for 2026-04-21

Volatility Metrics
Historical Volatility (Close-to-Close)	0.4528
Historical Volatility (Parkinson)	0.5021
Implied Volatility (Calls)	0.5550
Implied Volatility (Puts)	0.4831
Implied Volatility (Mean)	0.5190
Put-Call Implied Volatility Ratio	0.8704
Implied Volatility Skew	-0.0535
Option Statistics
Put-Call Ratio (Volume)	--
Put-Call Ratio (Open Interest)	5.2211