The confluence of single-stock ETFs and leverage has reached a fever pitch this year. Products tied to companies like SpaceX, Micron and SK Hynix are proliferating, attracting billions of dollars from traders — and raising concerns they're beginning to influence the very stocks they're meant to track. In some markets — we're looking at you, South Korea — regulators have even stepped in to pause new launches.

On this episode of Trillions, Eric Balchunas and Joel Weber speak with Bloomberg Intelligence ETF analyst James Seyffart and Baird Strategas ETF strategist Todd Sohn about what's fueling the boom, how these products actually work, and whether fears that they're becoming a threat to markets are justified — or overblown.