We provide novel evidence on the role of ambiguity aversion in determining the response of mutual fund investors to fund performance. Our analysis is motivated by theoretical models of decision making by ambiguity-averse investors. A key implication of the models is that when investors face...

We study the impact of the tournament-like competition in the mutual fund industry by examining the Active Share choices of funds. Funds with relatively poor performance by the end of the third quarter in a calendar year tend to increase their Active Share during the last quarter. The increase...