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Pricing Mortgage-Backed Securities: Integrating Optimal Call and Empirical Models of Prepayment

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  • Wayne R. Archer
  • David C. Ling

Abstract

Residential mortgage borrowers frequently appear to behave suboptimally with respect to their mortgage prepayment options. Many borrowers fail to exercise even well-into-the-money options while others prepay when the call option is out-of-the-money. To account for these apparently suboptimal prepayments, the recent trend in mortgage-backed securities research has been away from optimal call valuation models, in which the decision to exercise is determined endoge-nously, in favor of models in which prepayment behavior is exogenously specified based on empirical estimation. This paper develops a rational model of mortgage prepayment which incorporates both types of "non-optimal" prepayment and retains endogenous call. This enables the model to disentangle and compare the separate effects of the interest rate call, impeded by transaction costs, and of non-interest-rate driven prepayment. In addition, by recognizing heterogenous borrower transaction costs, the model presents a way to account more precisely for the varying prepayment lags associated with well-into-the-money call options and to account for the phenomenon of "burnout" within a mortgage pool. The paper includes an empirical test of the unbiasedness of the integrated pricing model by comparing simulated prices from our theoretical model to observed prices on traded Fannie Mae and GNMA securities. Copyright American Real Estate and Urban Economics Association.

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Bibliographic Info

Article provided by American Real Estate and Urban Economics Association in its journal Real Estate Economics.

Volume (Year): 21 (1993)
Issue (Month): 4 ()
Pages: 373-404

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Handle: RePEc:bla:reesec:v:21:y:1993:i:4:p:373-404

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Cited by:
  1. Agarwal, Sumit & Ambrose, Brent W. & Chomsisengphet, Souphala & Liu, Chunlin, 2006. "An empirical analysis of home equity loan and line performance," Journal of Financial Intermediation, Elsevier, vol. 15(4), pages 444-469, October.
  2. Harding, John P., 2000. "Mortgage Valuation with Optimal Intertemporal Refinancing Strategies," Journal of Housing Economics, Elsevier, vol. 9(4), pages 233-266, December.
  3. Lanot, Gauthier & Leece, David, 2010. "The Performance of UK Securitized Subprime Mortgage Debt: ‘Idiosyncratic’ Behaviour or Mortgage Design?," MPRA Paper 27137, University Library of Munich, Germany.
  4. Agarwal, Sumit & Chomsisengphet, Souphala & Hassler, Olivier, 2005. "The impact of the 2001 financial crisis and the economic policy responses on the Argentine mortgage market," Journal of Housing Economics, Elsevier, vol. 14(3), pages 242-270, September.
  5. Archer, Wayne R. & Ling, David C. & McGill, Gary A., 1997. "Demographic versus Option-Driven Mortgage Terminations," Journal of Housing Economics, Elsevier, vol. 6(2), pages 137-163, June.
  6. Sumit Agarwal & John C Driscoll & David Laibson, 2008. "Optimal Mortgage Refinancing: A Closed Form Solution," Levine's Working Paper Archive 122247000000002021, David K. Levine.
  7. Anthony Pennington-Cross & Souphala Chomsisengphet, 2007. "Subprime Refinancing: Equity Extraction and Mortgage Termination," Real Estate Economics, American Real Estate and Urban Economics Association, vol. 35(2), pages 233-263, 06.
  8. Erwin Charlier & Arjan van Bussel, 2003. "Prepayment Behavior of Dutch Mortgagors: An Empirical Analysis," Real Estate Economics, American Real Estate and Urban Economics Association, vol. 31(2), pages 165-204, 06.
  9. Wayne Archer & David C. Ling & Gary A. McGill, 1995. "The Effect of Income and Collateral Constraints on Residential Mortgage Terminations," NBER Working Papers 5180, National Bureau of Economic Research, Inc.
  10. Richard K. Green & Susan M. Wachter, 2007. "The housing finance revolution," Proceedings - Economic Policy Symposium - Jackson Hole, Federal Reserve Bank of Kansas City, pages 21-67.
  11. Stephen F. Thode, 2000. "CMOs, Duration Risk and a New Mortgage," Journal of Real Estate Research, American Real Estate Society, vol. 19(1), pages 73-103.
  12. Toshio Kimura & Naoki Makimoto, 2008. "Optimal Mortgage Refinancing with Regime Switches," Asia-Pacific Financial Markets, Springer, vol. 15(1), pages 47-65, March.

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