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A Framework for Integrating Extreme Weather Risk, Probability of Default, and Loss Given Default for Residential Mortgage Loans

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  • Michael C. S. Wong

    (Department of Economics and Finance, City University of Hong Kong, Kowloon Tong, Hong Kong, China)

  • Ho Ming Ho

    (College of Business, City University of Hong Kong, Kowloon Tong, Hong Kong, China)

Abstract

This paper considers a hypothetical case in which a bank wants to build a routine climate stress test exercise on residential mortgage loans. The bank has regularly updated the probability of default (PD) and loss given default (LGD) on each residential mortgage loan under the internal-rating-based (IRB) approach of Basel II/III. Additionally, the bank estimates the stressed PD and stressed LGD associated with a predetermined extreme weather event. Using simulation techniques, this paper shows that the loss of the bank’s residential mortgage portfolio can reach a median of around 36% of the portfolio value. This remarkable loss comes from the effects of default correlation and property damage. Banks should pay more attention to such impacts of extreme weather events.

Suggested Citation

  • Michael C. S. Wong & Ho Ming Ho, 2023. "A Framework for Integrating Extreme Weather Risk, Probability of Default, and Loss Given Default for Residential Mortgage Loans," Sustainability, MDPI, vol. 15(15), pages 1-16, August.
    • Handle: RePEc:gam:jsusta:v:15:y:2023:i:15:p:11808-:d:1207974
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    References listed on IDEAS

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    1. Tsai, Ming-Shann & Liao, Szu-Lang & Chiang, Shu-Ling, 2009. "Analyzing yield, duration and convexity of mortgage loans under prepayment and default risks," Journal of Housing Economics, Elsevier, vol. 18(2), pages 92-103, June.
    2. Duc Duy Nguyen & Steven Ongena & Shusen Qi & Vathunyoo Sila, 2022. "Climate Change Risk and the Cost of Mortgage Credit [Does climate change affect real estate prices? Only if you believe in it]," Review of Finance, European Finance Association, vol. 26(6), pages 1509-1549.
    3. Ajita Atreya & Susana Ferreira & Warren Kriesel, 2013. "Forgetting the Flood? An Analysis of the Flood Risk Discount over Time," Land Economics, University of Wisconsin Press, vol. 89(4), pages 577-596.
    4. Steffi Höse & Stefan Huschens, 2011. "Confidence Intervals for Asset Correlations in the Asymptotic Single Risk Factor Model," Operations Research Proceedings, in: Bo Hu & Karl Morasch & Stefan Pickl & Markus Siegle (ed.), Operations Research Proceedings 2010, pages 111-116, Springer.
    5. Sheridan Titman & Stathis Tompaidis & Sergey Tsyplakov, 2005. "Determinants of Credit Spreads in Commercial Mortgages," Real Estate Economics, American Real Estate and Urban Economics Association, vol. 33(4), pages 711-738, December.
    6. Michael Chak‐sham Wong & Yat‐fai Lam, 2008. "Macro stress tests and history‐based stressed PD: the case of Hong Kong," Journal of Financial Regulation and Compliance, Emerald Group Publishing Limited, vol. 16(3), pages 251-260, July.
    7. Quagliariello,Mario (ed.), 2009. "Stress-testing the Banking System China Edition," Cambridge Books, Cambridge University Press, number 9787504985132, January.
    8. Ketan B. Patel, 2021. "Managing Climate Risk in Mortgage Markets: A Role for Derivatives," Chicago Fed Letter, Federal Reserve Bank of Chicago, issue 462, pages 1-6, October.
    9. Amine Ouazad & Matthew E Kahn, 2022. "Mortgage Finance and Climate Change: Securitization Dynamics in the Aftermath of Natural Disasters," The Review of Financial Studies, Society for Financial Studies, vol. 35(8), pages 3617-3665.
    10. Michael Chak‐sham Wong & Yat‐fai Lam, 2008. "Macro stress tests and history‐based stressed PD: the case of Hong Kong," Journal of Financial Regulation and Compliance, Emerald Group Publishing Limited, vol. 16(3), pages 251-260, July.
    11. Marco Locurcio & Francesco Tajani & Pierluigi Morano & Debora Anelli & Benedetto Manganelli, 2021. "Credit Risk Management of Property Investments through Multi-Criteria Indicators," Risks, MDPI, vol. 9(6), pages 1-23, June.
    12. Ajita Atreya & Susana Ferreira, 2015. "Seeing is Believing? Evidence from Property Prices in Inundated Areas," Risk Analysis, John Wiley & Sons, vol. 35(5), pages 828-848, May.
    13. Jesse M. Keenan & Jacob T. Bradt, 2020. "Underwaterwriting: from theory to empiricism in regional mortgage markets in the U.S," Climatic Change, Springer, vol. 162(4), pages 2043-2067, October.
    14. Quagliariello,Mario (ed.), 2009. "Stress-testing the Banking System," Cambridge Books, Cambridge University Press, number 9780521767309, January.
    15. Arthur Korteweg & Morten Sorensen, 2016. "Estimating Loan-to-Value Distributions," Real Estate Economics, American Real Estate and Urban Economics Association, vol. 44(1), pages 41-86, February.
    16. Leow, Mindy & Mues, Christophe, 2012. "Predicting loss given default (LGD) for residential mortgage loans: A two-stage model and empirical evidence for UK bank data," International Journal of Forecasting, Elsevier, vol. 28(1), pages 183-195.
    17. Benjamin J. Keys & Philip Mulder, 2020. "Neglected No More: Housing Markets, Mortgage Lending, and Sea Level Rise," NBER Working Papers 27930, National Bureau of Economic Research, Inc.
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