Motley Fool Asset Management, a subsidiary of Motley Fool Holdings, which also owns the popular investing website MotleyFool.com, rolled out three new ETFs Tuesday. The passively managed single-factor funds launched on the Nasdaq exchange and include the following: The funds all have an expense ratio of 0.50%. They track indexes that reflect Motley Fool's "evidence- based investing principles†in the composite factor scores used to select their holdings. VettaFi LLC ("VettaFi†) is the index provider for MF ...