Incumbent companies don’t take kindly to upstarts threatening to change the way an industry works. Whether you’re Uber or Lyft undercutting taxi companies or Airbnb pulling guests away from hotels, someone is going to be upset about having to compete with an idea that seemed to come out of left field.
The situation is no different for private “dark pool” trading venue IEX, which expects to find out March 21 whether the Securities and Exchange Commission will grant it approval to become a public stock exchange. Billing itself as the good guy stock market where high-frequency traders don’t have an unfair advantage, IEX has predictably caught more than a little flak from heavyweight competitors Nasdaq, NYSE and BATS.

