Paper #1283

Títol:

A model of shadow banking

Autors:

Nicola Gennaioli, Andrei Shleifer i Robert Vishny

Data:

Maig 2011

Resum:

We present a model of shadow banking in which financial intermediaries originate and trade loans, assemble these loans into diversified portfolios, and then finance these portfolios externally with riskless debt. In this model: i) outside investor wealth drives the demand for riskless debt and indirectly for securitization, ii) intermediary assets and leverage move together as in Adrian and Shin (2010), and iii) intermediaries increase their exposure to systematic risk as they reduce their idiosyncratic risk through diversification, as in Acharya, Schnabl, and Suarez (2010). Under rational expectations, the shadow banking system is stable and improves welfare. When investors and intermediaries neglect tail risks, however, the expansion of risky lending and the concentration of risks in the intermediaries create financial fragility and fluctuations in liquidity over time.

Paraules clau:

securitization, neglected risk, financial fragility

Codis JEL:

E51, E44, G2

Àrea de Recerca:

Macroeconomia i Economia Internacional

Publicat a:

Journal of Finance, Forthcoming

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