The Interbank Market Run and Creditor Runs Xuewen Liu The Hong Kong University of Science and Technology This version: June 2014 Abstract This paper develops a general equilibrium model to study the interplay between the interbank market run (the run by banks on the interbank market, such as the (bilateral) Repo run) and creditor runs (runs by non-bank creditors on a bank) in a …nancial system. We …rst present a novel framework to endogenize the interbank market. In our framework, the illiquidity risk of banks is endogenous, originating in the insolvency risk. The role of the interbank market is to allow banks in the …nancial system with idiosyncratic solvency shocks to trade short-term funds to solve their illiquidity problem and thus mitigate the potential creditor runs. With this framework, we then show that the interbank market run and creditor runs interact and in fact reinforce each other, and the feedback can amplify a small aggregate shock into the joint event of “interbank market freezing”and “liquidity evaporating”, which helps explain a systemic crisis. JEL classi…cation: G01; G21; D83; D53 Keywords: Interbank market, creditor runs, coordination risk, global games, general equi- librium I am indebted to Itay Goldstein and Hyun Song Shin for discussion and detailed feedback on this research. I thank Toni Ahnert (discussant), Sudipto Dasgupta, Plantin Guillaume, Shiyang Huang, Stephen Morris, Xavier Vives, Tianxi Wang and seminar participants at Barcelona GSE Summer Forum 2014 –Information and Market Frictions, and HKUST for helpful comments. All errors are my own. Contact:
[email protected]. 1 1 Introduction A salient feature of the recent …nancial crisis of 2007-2009 was systemic creditor runs on …nancial institutions.