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.

FlexShares Morningstar Global Upstream Natural Resources ETF (GUNR) had 30-Day Historical Volatility (Close-to-Close) of 0.1193 for 2025-08-28.

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Volatility Metrics
Historical Volatility (Close-to-Close)	0.1193
Historical Volatility (Parkinson)	0.0794
Implied Volatility (Calls)	0.1872
Implied Volatility (Puts)	0.1488
Implied Volatility (Mean)	0.1680
Put-Call Implied Volatility Ratio	0.7952
Implied Volatility Skew	--
Option Statistics
Put-Call Ratio (Volume)	--
Put-Call Ratio (Open Interest)	0.1000