HONG KONG, 10 June 2019. Pengyuan International has released a research report, titled Predicting Prepayment Risk in China’s Residential Mortgage Backed Securities (RMBS). The report is accessible at:


https://www.pyrating.com/Plugins/Pdfjs/pdfjs/web/viewer.html?file=/Upload/Reports/201906/20190610170724858519067.pdf 


In this research, we develop a semi-parametric prepayment prediction model that incorporates China’s market and mortgage characteristics. Exploiting the flexibility of this semi-parametric model, we provide evidence that many factors have highly non-linear effects on the prepayment rates. Our empirical findings show that


  • Partial prepayments and full prepayments exhibit different behavioral patterns in China’s mortgage prepayment data. In general, the patterns of total prepayments are mainly determined by those of full prepayments.


  • Loan age (or seasoning) shows different relationships with partial and full prepayments. For example, in China Construction Bank’s (CCB) prepayment data, the loan age effect on the partial prepayment rate first increases, reaches a peak around the 23rd month, and then declines. In contrast, the impacts on the full prepayment rate keep increasing as loan age increases.


  • Both partial and full prepayments have an apparent seasonal pattern. The prepayment rates are higher in February, March and April than in other months, which are possibly driven by the seasonal pattern in home sales or borrowers’ available income.


  • The difference between the rate on the mortgage and the current market rate has obvious influences on both partial prepayment and full prepayment behaviors.


  • The borrowers’ prepayment behaviors are significantly influenced by housing market activities and macroeconomic factors.


Our findings about the relationships between the factors and prepayments shed new light on how the driving factors affect borrower’s prepayment decisions. The prediction results based on historical prepayment data and RMBS performance data support the model specification and demonstrate the model’s superior predictive power. The applications of the model include cash flow projections as well as valuation and risk management for mortgages and RMBS.


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Ke Chen, PhD

+852 3615 8316

ke.chen@pyrating.com


Secondary Analyst

Shiyu Wang, PhD

+86 755 8287 1237

shiyu.wang@pyrating.com 

media@pyrating.comcontact@pyrating.com

 

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