The Effect of Mortgage Price and Default Risk on Mortgage Spreads

Original Article


Variations over time in mortgage yield spreads should reflect changes in the underlying prepayment option value; moreover, the relationship between mortgage yield spreads and interest rate dynamics should weaken as the value of the borrower’s prepayment option declines. We verify this hypothesis through an empirical analysis of residential mortgage yield spread behavior, and we also present evidence that the strength of the relationship between mortgage spreads and interest rate dynamics weakens (strengthens) as the level of default risk increases (decreases). This result is consistent with the “competing risks” effect between a borrower’s option to prepay or default. Our results demonstrate the importance of accounting for mortgage price discount to par as well as default risk when developing time series of mortgage yields.

Key Words

mortgage spreads call option points yield curve dynamics 


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  1. Black, F., and J. C. Cox. (1976). “Valuing Corporate Securities: Some Effects of Bond Indenture Provisions,” Journal of Finance 31, 351–367.Google Scholar
  2. Black, F., and M. Scholes. (1973). “The Pricing of Options and Corporate Liabilities,” Journal of Political Economy 81, 637–654.Google Scholar
  3. Black, D. G., K. D. Garbade, and W. L. Silber. (1981). “The Impact of the GNMA Pass-Through Program on FHA Mortgage Costs,” Journal of Finance 36, 457–469.Google Scholar
  4. Brennan, M. J., and E. S. Schwartz. (1977). “Savings Bonds, Retractable Bonds and Callable Bonds,” Journal of Financial Economics 5, 67–88.Google Scholar
  5. Buser, S. A., P. H. Hendershott, and A. B. Sanders. (1990). “Determinants of the Value of Call Options on Default-free Bonds,” Journal of Business 63, S33–S50.Google Scholar
  6. Duffie, G. R. (1998). “The Relation Between Treasury Yields and Corporate Bond Yield Spreads,” Journal of Finance 53, 2225–2241.Google Scholar
  7. Dunn, K. B., and J. J. McConnell. (1981). “Valuation of GNMA Mortgage-Backed Securities,” Journal of Finance 36, 599–616.Google Scholar
  8. Elton, E. J., M. J. Gruber, D. Agrawal, and C. Mann. (2001). “Explaining the Rate Spread on Corporate Bonds,” Journal of Finance 56, 247–277.Google Scholar
  9. Geske, R. (1977). “The Valuation of Corporate Liabilities as Compound Options,” Journal of Financial and Quantitative Analysis 12, 541–552.Google Scholar
  10. Kau, J. B., and D. Keenan. (1995). “An Overview of the Option-Theoretic Pricing of Mortgages,” Journal of Housing Research 6(2), 217–244.Google Scholar
  11. Kau, J. B., D. C. Keenan, W. J. Mueller III, and J. F. Epperson. (1992). “A Generalized Valuation Model for Fixed-Rate Residential Mortgages,” Journal of Money, Credit and Banking 24, 279–299.Google Scholar
  12. Longstaff, F. A., and E. S. Schwartz. (1995). “A Simple Approach to Valuing Risky Fixed and Floating Rate Debt,” Journal of Finance 50, 789–819.Google Scholar
  13. Merton, R. C. (1974). “On the Pricing of Corporate Debt: The Risk Structure of Interest Rates,” The Journal of Finance 29, 449–470.Google Scholar
  14. Titman, S., and W. Torous. (1989). “Valuing Commercial Mortgages: An Empirical Investigation of the Contingent-Claims Approach to Pricing Risky Debt,” Journal Finance 44, 345–373.Google Scholar
  15. Yongheng, D., J. M. Quigley, and R. Van Order. (2000). “Mortgage Terminations, Heterogeneity and the Exercise of Mortgage Options,” Econometrica, 68(2), 275–307.Google Scholar

Copyright information

© Springer Science + Business Media, Inc. 2005

Authors and Affiliations

  1. 1.University of GeorgiaAthensUSA
  2. 2.Bank of AmericaCharlotteUSA

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