Stress Testing for Retail Mortgages Based on Probability Analysis

Chang Liu () and Raja Nassar ()
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Chang Liu: Southwestern University of Finance and Economics
Raja Nassar: Louisiana Tech University

Computational Economics, 2019, vol. 53, issue 1, No 18, 433-455

Abstract: Abstract One big problem with stress testing used by banks, regulators, and international financial organization is that the test does not predict occurrence probabilities of certain pre-specified stress scenarios and their consequent loss to be expected, which is, however, the real purpose of stress testing in the first place. As a result, institutes lack information sufficient enough for preserving appropriate resources to hedge risks prompted by these scenarios. In this study we use real life retail mortgages from a Chinese commercial bank and propose a stress testing approach based on probability analysis of different scenarios. This method would provide not only the amount of expected loss, but also that of the loan distributed over the loan classification states: Standard, Special Mention, Substandard, Doubtful, Loss, and Paid-off. Consequently, the bank management would have useful information when making credit operation policy decisions. In addition, the models and algorithms, providing practical risk management tools for banks and regulators, could be implemented on other commercial credit products as well.

Keywords: Stress testing; Non-stationary Markov chains; Copula; Simulation; Retail mortgages (search for similar items in EconPapers)
Date: 2019
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DOI: 10.1007/s10614-018-9825-6

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