In this paper, we examine if the diversification decisions of individual investors influence asset prices. First, we show that a vast majority of individual investors in our sample are under-diversified and the unexpectedly high idiosyncratic risk in their portfolios results in a welfare loss -...

This paper analyzes a model of fund managers' reputation concerns. It explains why "Nickel strategies" (strategies that earn small positive returns most of the time but occasionally lead to dramatic losses) are more popular among managers than the opposite "Black Swan strategies," (strategies...