Modern financial markets offer the real world's best approximation to the idealized price auction market envisioned in economic theory. Nevertheless, as the increasingly exquisite and detailed financial data demonstrate, financial markets often fail to behave as they should if trading were truly...

Individual investors trade excessively, sell winners too soon, and overweight stocks with lottery features and low expected returns. This paper proposes and models a financial innovation, called stock loan lotteries, that improves individual investor performance. An individual investor signs a...