Abstract
We propose a new channel through which teamwork improves mutual fund activity: by offsetting individual manager overconfidence, teams mitigate excessive performance-induced trading (PIT). The predictions of our theoretical model are confirmed in the data. Team-managed funds trade less after good performance than single-managed funds and this differential increases with team size. Moreover, changes from single-to team-management correspond to lower PIT. Our results cannot be explained by alternative explanations, including manager experience, fund governance, gender, and fund flows. Overconfident trading by single-managed funds results in lower next-period returns compared to team-managed funds. Our findings indicate that team-management reduces uninformed overconfident trading.
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