The Basel 2 Accord requires regulatory capital to cover stress tests, yet no coherent and objective framework for stress testing portfolios exists. We propose a new methodology for stress testing in the context of market risk models that can incorporate both volatility clustering and heavy tails. Empirical results compare the performance of eight risk models with four possible conditional and u...

Banks are growing ever larger compared to their national economies. We show that increases in relative bank size (measured as a bank’s liabilities divided by national GDP) are linked to banks displaying higher tail risk. This effect is not entirely due to risk channels that disproportionately expose relatively large banks to systematic tail risks, sovereign risks, or banking crises. Instead, we...

This paper develops a framework for stress-testing the credit risk of Chinese commercial banks to macroeconomic shocks. Using data over the period 1985-2008, this study establishes a vector auto-regression (VAR) model to describe the links between default rate and macroeconomic factors, and then designs three stress scenarios to implement the stress testing by Monte Carlo simulation. As a resul...

The objective of this paper is to analyse the network topology of the Italian segment of the European overnight money market through methods of statistical mechanics applied to complex networks. We investigate differences in the activities of banks of different sizes and the evolution of their connectivity structure over the maintenance period. The main purpose of the analysis is to establish t...

The magnitude and frequency of recent financial crises underscore the importance of understanding financial instability for the purpose of crisis prevention and crisis management. This paper brings together and adds structure to the theoretical literature on financial instability and the implications they carry for policy-makers. In addition to clarifying the theoretical underpinnings for study...

I test theories of the recent financial crisis by studying how banks’ pre-crisis investments connect to their CEOs’ beliefs. Using different proxies for beliefs, I find banks with larger housing investments and worse crisis performance had CEOs who were more optimistic ex ante. Banks with the most optimistic CEOs experienced 20 percentage points higher real estate loan growth, and 15 percentage...

This paper presents evidence that reductions in mortgage interest rates associated with prepayment penalties are greater for riskier borrowers, as measured by mortgage type, credit scores, and local incomes and education levels. This is consistent with an efficiency view that, by reducing the reclassification risk faced by lenders, prepayment penalties can be welfareimproving. Additional findin...

This paper provides a unified analysis for the onset of the 1998 financial crisis and the strong economic recovery afterward in Russia and other former Soviet Union countries. Before the crisis a banking failure arose owing to the coexistence of a lemons credit market and high government borrowing. In a lemons credit market low credit risk firms switched from bank to nonbank finance, including ...

A string of theoretical papers shows that the non-exclusivity of credit contracts generates important negative contractual externalities. Employing a unique dataset, we identify how these externalities affect the supply of credit. Using internal information on a creditor’s willingness to lend, we find that a creditor reduces its credit supply when a borrower obtains a loan at another creditor (...

We assess the impact of the geographic expansion of bank assets on the cost of banks’ interestbearing liabilities. Existing research suggests that expansion can both intensify agency problems that increase funding costs and facilitate risk diversification that decreases funding costs. Using a newly developed identification strategy, we discover that the geographic expansion of banks across U.S....