Externalities in interbank network: results from a dynamic simulation model
In this paper we conduct a simulation run on a sample of Italian banks where a trigger shock, a one-off event fairly large in size, spreads through the interbank network in a set-up featuring among the actors both commercial banks and the authorities. The banks deleverage to comply with a regulatory capital (leverage) ratio, roll off interbank loans, bid for central bank liquidity, seek help within their own group and dispose of assets. As the shock spreads, borrowers who lack liquid assets may be forced to undertake fire sales, letting their capital position deteriorate. A vicious circle arises in which capital and liquidity risks amplify the crisis. When authorities intervene, unconventional monetary policies smooth the contagion over but these measures become less effective when the shock is very large, when the situation is best addressed by policies aiming at strengthening banksï¿½ capital. In a theoretical scenario, in which authorities do not enact specific measures, a small fraction of the banking system (in terms of total assets) may be in default at the end of the simulation, while a larger share of banks would need to be recapitalized.
|Date of creation:||Nov 2012|
|Date of revision:|
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- Paolo Emilio Mistrulli, 2007.
"Assessing financial contagion in the interbank market: Maximum entropy versus observed interbank lending patterns,"
Temi di discussione (Economic working papers)
641, Bank of Italy, Economic Research and International Relations Area.
- Mistrulli, Paolo Emilio, 2011. "Assessing financial contagion in the interbank market: Maximum entropy versus observed interbank lending patterns," Journal of Banking & Finance, Elsevier, vol. 35(5), pages 1114-1127, May.
- Paolo Pinotti, 2012.
"The Economic Costs of Organized Crime: Evidence from Southern Italy,"
054, "Carlo F. Dondena" Centre for Research on Social Dynamics (DONDENA), Università Commerciale Luigi Bocconi.
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- Tobias Adrian & Hyun Song Shin, 2008.
"Liquidity and leverage,"
328, Federal Reserve Bank of New York.
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