Historical Volatility (Close-to-Close) (30-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.

CollPlant Biotechnologies Ltd. Sponsored ADR (CLGN) had 30-Day Historical Volatility (Close-to-Close) of 2.3292 for 2025-05-29.

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Figures for 2025-05-29

Volatility Metrics
Historical Volatility (Close-to-Close)	2.3292
Historical Volatility (Parkinson)	1.7026
Implied Volatility (Calls)	--
Implied Volatility (Puts)	--
Implied Volatility (Mean)	--
Put-Call Implied Volatility Ratio	--
Implied Volatility Skew	--
Option Statistics
Put-Call Ratio (Volume)	0.2721
Put-Call Ratio (Open Interest)	0.8851