CFCM CENTRE FOR FINANCE, CREDIT AND MACROECONOMICS Working Paper 14/04 Complex Financial Networks and Systemic Risk: A Review Spiros Bougheas and Alan Kirman Produced By: Centre for Finance, Credit and Macroeconomics School of Economics Sir Clive Granger Building University of Nottingham University Park Nottingham NG7 2RD Tel: +44(0) 115 951 5619 Fax: +44(0) 115 951 4159
[email protected] Complex Financial Networks and Systemic Risk: A Review Spiros Bougheas School of Economics, University of Nottingham, UK Alan Kirman GREQAM, EHESS, Aix-Marseille University, France Abstract In this paper we review recent advances in financial economics in rela- tion to the measurement of systemic risk. We start by reviewing studies that apply traditional measures of risk to financial institutions. However, the main focus of the review is on studies that use network analysis paying special attention to those that apply complex analysis techniques. Appli- cations of these techniques for the analysis and pricing of systemic risk has already provided significant benefits at least at the conceptual level but it also looks very promising from a practical point of view. Keywords: Comlex Financial Systems, Networks, Systemic Risk 1 Introduction The 2007-2009 global financial crisis has painfully demonstrated how costly a systemic failure can be. Systemic events impose high costs on taxpayers as gov- ernments usually intervene by bailing out important institutions in an effort to ensure the survival of the financial system. Unfortunately, the implementation of such policies are also part of the causes of the next crisis. This is because they encourage opportunistic behavior by these same institutions in anticipa- tion of the government policies.