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FYI: Northern Trust Asset Management's FlexShares brand offers a variety of smart beta ETFs as well as some nontraditional asset ETFs. All are designed as building blocks for overall portfolios. The firm has been judicious when it comes to launches. Currently the firm offers a lineup of 29 ETFs, the largest of which is the $5.3 billion FlexShares Morningstar Global Upstream Natural Resources Index Fund (GUNR). Regards, Ted https://www.etf.com/publications/etfr/flexshares-focus-outcomes?nopaging=1