I analyze welfare properties of mutual funds in the Diamond-Dybvig model with two sources of aggregate risk: undiversifiable interest rate risk and shocks to aggregate liquidity demand. Mutual funds are inefficient when the economy faces undiversifiable interest rate risk. However, if only...

I revisit the Diamond-Dybvig model of liquidity insurance in the presence of hidden trades. The key result is that in this environment deposit-taking banks are not necessary for the efficient provision of liquidity. Mutual funds are constrained efficient when supplemented with the same...

This paper studies liquidity insurance by financial intermediaries when agents can make unobservable side trades. Closed-end mutual funds of Jacklin (1987) achieve constrained efficiency when regulated appropriately, equilibrium is unique, and there are no financial panics. In an economy with...