Abstract
We extend Diamond and Dybvig's (1983)[11] model to a dynamic context where we study how the bank's financial stability is a®ected by successive withdrawal shocks during a crisis. We model a crisis as a series of these unanticipated events over a long period of time and not as isolated bank runs. We highlight the importance of banks' portfo- lio liquidity in surviving such crisis. The paper shows that external borrowing can smooth investment returns to guarantee that solvent but illiquid intermediaries can survive a crisis. In the presence of borrowing restrictions banks' liquidity exhibits an erratic behaviour.