What Is Driving Investors to FlexShares’ Largest ETF, GUNR?

The largest fund in FlexShares’ ETF line-up has nearly $7 billion in assets under management, but what is it about GUNR that has attracted $2.2 billion in net inflows during the last year alone? The FlexShares Morningstar Global Upstream Natural Resources Index Fund (GUNR) is one of the more...