We merge survey data on a sample of individual investors containing test-based measures of financial literacy with administrative records on their assets holding and trades before, during and after the financial crisis of September 2008. This dataset allows us to design three tests of the...

Rational investors perceive correctly the value of financial information. Investment in information is therefore rewarded with a higher Sharpe ratio. Overconfident investors overstate the quality of their own information, and thus attain a lower Sharpe ratio. We contrast the implications of the...

Does inefficiency of financial markets have real consequences? Or does it only result in transfers of wealth from noise traders to arbitrageurs? We study firm business investment to address this question. In our model, benevolent managers of overvalued companies invest in projects with negative...