I won a silver medal at the Math Olympiad, worked at Amazon, and co-founded a hedge fund. Math has been the through-line for everything.

Two Sigma is a technology company that happens to trade financial markets. We have more engineers than traders.

The future of investing is machines making decisions faster and better than humans. We are building that future.

My wife writes children's books about math. I run a math-based hedge fund. Our kids never had a chance to avoid numbers.

At Amazon in 1996, I helped build the recommendation engine. Turns out, recommending stocks is not that different from recommending books.