The alternative trading system IEX continues to gain market share and has been referred to as the fastest growing securities market in U.S. history. In order to scale its ability to protect more investors, IEX needs approval from the Securities and Exchange Commission to operate as a stock exchange. But the company is facing a surprising level of opposition, with some even calling the company “un-American.” Brad Katsuyama, IEX’s CEO and co-founder explains: ...