How Does Illiquidity Affect Delegated Portfolio Choice

In response to how they are compensated, mutual fund managers who are under-performing by mid-year are likely to increase the risk of their portfolios towards the year-end. We argue that an increase in the liquidity of the stocks that managers use as risk-shifting tools can lead to an increase in the size of their risky bets. This in turn hurts fund investors by increasing the costs of misaligned incentives associated with delegated portfolio management. We provide both theoretical and empirical results that are consistent with this argument. We use decimalization as an exogenous shock to liquidity to identify causal effects.