Robinhood, a stock trading company, is a little different from the Charles Schwabs of the world.
Since the financial crisis, the credibility of Wall Street has taken a beating. These days MBA graduates are as likely to work at socially minded start-ups as mega-banks. And day trading isn't quite the popular sport it was in the helter-skelter days of the 1990s. Helping the planet is cool. Making unthinkingly large amounts of money is not.