Historical Volatility (Parkinson) (150-Day)

Historical Volatility (Parkinson): The past volatility of the security over the selected time frame, calculated using the high and low prices on each trading day.

So-Young International Inc. Sponsored ADR (SY) had 150-Day Historical Volatility (Parkinson) of 1.2095 for 2025-08-01.

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Figures for 2025-08-01

Volatility Metrics
Historical Volatility (Close-to-Close)	1.1597
Historical Volatility (Parkinson)	1.2095
Implied Volatility (Calls)	--
Implied Volatility (Puts)	1.0054
Implied Volatility (Mean)	--
Put-Call Implied Volatility Ratio	--
Implied Volatility Skew	--
Option Statistics
Put-Call Ratio (Volume)	1.1619
Put-Call Ratio (Open Interest)	1.0151