There are over 120 U.S. ETF issuers, but only one has more than $1 trillion in assets, over 300 products and knows what it is like to beat Vanguard: BlackRock. The asset manager made the equivalent of the Louisiana Purchase when it acquired iShares from Barclays in 2009, a move that has made them the most dominant player in the industry. Joel and Eric interview Martin Small, head of U.S. iShares, about ETFs, investing and his insatiable appetite for guitars.