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On the valuation of reverse mortgage insurance

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  • Chou-Wen Wang
  • Hong-Chih Huang
  • Yung-Tsung Lee

Abstract

This article presents a closed-form formula for calculating the loan-to-value (LTV) ratio in an adjusted-rate reverse mortgage (RM) with a lump sum payment. Previous literatures consider the pricing of RM in a constant interest rate assumption and price it on fixed-rate loans. This paper successfully considers the dynamic of interest rate and the adjustable-rate RM simultaneously. This paper also considers the housing price shock into the valuation model. Assuming that house prices follow a jump diffusion process with a stochastic interest rate and that the loan interest rate is adjusted instantaneously according to the short rate, we demonstrate that the LTV ratio is independent of the term structure of interest rates. This argument holds even when housing prices follow a general process: an exponential Lévy process. In addition, the HECM (Home Equity Conversion Mortgage) program may be not sustainable, especially for a higher level of housing price volatility. Finally, when the loan interest rate is adjusted periodically according to the LIBOR rate, our finding reveals that the LTV ratio is insensitive to the parameters characterizing the CIR model.

Suggested Citation

  • Chou-Wen Wang & Hong-Chih Huang & Yung-Tsung Lee, 2016. "On the valuation of reverse mortgage insurance," Scandinavian Actuarial Journal, Taylor & Francis Journals, vol. 2016(4), pages 293-318, April.
    • Handle: RePEc:taf:sactxx:v:2016:y:2016:i:4:p:293-318
    DOI: 10.1080/03461238.2014.925967
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    Cited by:

    1. de la Fuente, Iván & Navarro, Eliseo & Serna, Gregorio, 2023. "Proposal for calculating regulatory capital requirements for reverse mortgages," Socio-Economic Planning Sciences, Elsevier, vol. 88(C).

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