Brad Katsuyama

Anyone with a pension or retirement is an investor in the stock market.

Society has changed so dramatically that it's empowered the individual, and technology has a lot to do with that. Years ago, if you had a bad experience at a restaurant, you could complain to the manager. Maybe you could picket. Now, you go online and write a review that may go viral.

We built a market at IEX that does not sell certain types of technology advantages to high-frequency traders, and as a result, the high-frequency traders that didn't rely on buying those advantages trade on IEX.

The people who watch a movie like 'Wolf of Wall Street' and want to work on Wall Street are exactly the kind of people who shouldn't.