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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.

High-frequency traders are firms all around the world. They're massive investments. And there is an incredible race for speed now. People are paying hundreds of millions of dollars to shave milliseconds off.

Markets are a good thing, and they are the best way of ensuring we have fairness.

High-frequency traders are firms all around the world. They're massive investments.

As someone with a deep faith in competition and the market, I also know that markets only work with tough enforcement of the rules that guarantee competition and fair play - and that the pressure to break those rules only gets stronger as the amount of money involved gets larger.

To try to correct imbalances with trade restrictions is a grave error.

Economically, unfair trade will benefit nobody in the long run, as poorer countries will be bled totally dry and will become unable to produce anything.

I had always been interested in markets - specifically, the theory that in financial markets, goods will trade at a fair value only when everyone has access to the same information.

If you change the rules of the market, you can be more successful than your competitors.

You can do too much and oversell your market.