Historical Volatility (Close-to-Close) (180-Day)

Historical Volatility (Close-to-Close): The past volatility of the security over the selected time frame, calculated using the closing price on each trading day.

Calamos Russell 2000 Structured Alt Protection ETF - April (CPRA) had 180-Day Historical Volatility (Close-to-Close) of 0.0290 for 2025-10-13.

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Volatility Metrics
Historical Volatility (Close-to-Close)	0.0290
Historical Volatility (Parkinson)	0.0208
Implied Volatility (Calls)	--
Implied Volatility (Puts)	--
Implied Volatility (Mean)	--
Put-Call Implied Volatility Ratio	--
Implied Volatility Skew	--
Option Statistics
Put-Call Ratio (Volume)	--
Put-Call Ratio (Open Interest)	--