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.

MSA Safety Incorporporated (MSA) had 180-Day Put-Call Ratio (Open Interest) of 2.1250 for 2026-07-20.

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Figures for 2026-07-20

Volatility Metrics
Historical Volatility (Close-to-Close)	0.2517
Historical Volatility (Parkinson)	0.2477
Implied Volatility (Calls)	0.2778
Implied Volatility (Puts)	0.2773
Implied Volatility (Mean)	0.2775
Put-Call Implied Volatility Ratio	0.9981
Implied Volatility Skew	0.0326
Option Statistics
Put-Call Ratio (Volume)	--
Put-Call Ratio (Open Interest)	2.1250