Bloomberg Radio host Barry Ritholtz speaks to Sarah Kirshbaum Levy, chief executive officer of Betterment LLC, an independent digital investment adviser with $40 billion in assets under management. Prior to joining Betterment, Levy was chief operating officer of Viacom Media Networks, where she oversaw global strategy, finance and operations. Previously, Levy served as COO at Nickelodeon, where she spearheaded Nickelodeon's entry into new segments, including consumer products, resorts, Broadway and theme parks, and subscription video on demand.