Regulators should look at the structure of leverage products and supervise them differently, because leveraged exchange-traded funds (ETFs) have structural problems that could “blow up” the whole industry one day, said Larry Fink, chief executive officer at asset management firm BlackRock Inc. Speaking at a Deutsche Bank investment conference in New York yesterday, Fink, who heads a firm with more than $4tr in assets under management (AUM), including nearly $1tr in ETF client assets, said that