William Blair, one of the last remaining legacy mutual fund firms to enter the ETF space, launched its first exchange-traded funds today. The new offerings include an international strategy ($WBIE) and an emerging markets strategy ($WBEM). Both ETFs carry a 55 basis point fee, which is significantly lower than the firm's existing mutual fund share classes. This pricing structure positions the new ETFs as a more cost-efficient option for investors seeking international and emerging market exposure through William Blair's platform.