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.

Federal Signal Corporation (FSS) had 180-Day Put-Call Ratio (Open Interest) of 0.1917 for 2026-01-16.

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Figures for 2026-01-16

Volatility Metrics
Historical Volatility (Close-to-Close)	0.3630
Historical Volatility (Parkinson)	0.3133
Implied Volatility (Calls)	0.3325
Implied Volatility (Puts)	0.3253
Implied Volatility (Mean)	0.3289
Put-Call Implied Volatility Ratio	0.9784
Implied Volatility Skew	0.0225
Option Statistics
Put-Call Ratio (Volume)	--
Put-Call Ratio (Open Interest)	0.1917