Despite the extensive work on currency mismatches, research on the significance of maturity mismatches in emerging market countries is scarce. In this paper, I show that emerging market banks' maturity mismatches increase during periods of high capital inflows, and that banks with high maturity mismatches are less profitable during crisis periods but more profitable otherwise. Hence, banks face a tradeoff between higher returns and risk. These results follow from a panel regression on a data set I constructed by merging bank level data with aggregate data. A simple Diamond-Dybvig (1983) partial equilibrium framework motivates the empirical analysis.