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This study presents an analysis of the impact of asset price bubbles on standard credit risk measures, including Expected Loss -EL- and Credit Value-at-Risk -CVaR-. We present a styled model of asset price bubbles in continuous time, and perform a simulation experiment of a 2 dimensional Stochastic Differential Equation -SDE- system for asset value determining Probability of Default -PD- through a Constant Elasticity of Variance -CEV- process, as well as a correlated a Loss-Given-Default -LGD- through a mean reverting Cox-Ingersoll-Ross -CIR- process having a long-run mean dependent upon the asset value. Comparing bubble to non-bubble economies, it is shown that asset price bubbles may cause an obligor’s traditional credit risk measures, such as EL and CVaR to decline, due to a reduction in both the standard deviation and right skewness of the credit loss distribution. We propose a new risk measure in the credit risk literature to account for losses associated with a bubble bursting, the Expected Holding Period Credit Loss -EHPCL-, a phenomenon that must be taken into consideration for the proper determination of economic capital for both credit risk management and measurement purposes.

KEYWORDS

Financial Crisis, Credit Risk, Model Risk, Asset Price Bubbles, Expected Loss, Credit Val-Ue-At-Risk, Stochastic Differential Equations, Probability of Default, Loss Given Default, Constant Elasticity of Variance, Cox-Ingersoll-Ross

Cite this paper

Jacobs Jr., M. 2015 The Impact of Asset Price Bubbles on Credit Risk Measures. Journal of Financial Risk Management, 4, 251-266. doi: 10.4236-jfrm.2015.44019.





Autor: Michael Jacobs Jr.

Fuente: http://www.scirp.org/



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