Previous mortgage prepayment and valuation models assume that two mortgage pools with the same observable characteristics should behave indistinguishably. However, even pools with apparently identical characteristics often exhibit markedly different prepayment behavior. The sources of this heterogeneity may be unobservable, but we can infer information about a pool from its prepayment behavior over time. This article develops a methodology for using this information to calculate pool-specific mortgage-backed security prices. Knowledge of these prices is important both for portfolio valuation and for determining the cheapest pool to deliver when selling mortgagebacked securities. We find that unobservable heterogeneity between mortgage pools is statistically significant, and that pool-specific prices, calculated for a sample of outwardly identical mortgage pools between 1983 and 1989, may differ greatly from any single representative price.
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Akerlof, G. (1970). “The Market for Lemons: Quality Uncertainty and the Market Mechanism,”Quarterly Journal of Economics 89, 488–500.
Amemiya, T. (1985).Advanced Econometrics. Cambridge, MA: Harvard University press.
Bartlett, W. (1989).Mortgage-Backed Securities: Products, Analysis, Trading. Englewood Cliffs, NJ: Prentice-Hall.
Becketti, S., and C. Morris. (1990). “The Prepayment Experience of FNMA Mortgage-Backed Securities.” Working paper, New York University Salomon Center.
Cox, J.C., J.E. Ingersoll, and S.A. Ross. (1985). “A Theory of the Term Structure of Interest Rates,”Econometrica 53, 385–467.
Cox, D.R., and D. Oakes. (1984).Analysis of Survival Data. New York: Chapman and Hall.
Dunn, K.B., and J.J. McConnell. (1981a). “A Comparison of Alternative Models for Pricing GNMA Mortgage-Backed Securities,”Journal of Finance 36, 471–483.
Dunn, K.B., and J.J. McConnell. (1981b). “Valuation of Mortgage-Backed Securities,”Journal of Finance 36, 599–617.
Dunn, K.B., and C.S. Spatt. (1986). “The Effect of Refinancing Costs and Market Imperfections on the Optimal Call Strategy and the Pricing of Debt Contracts.” Working paper, Carnegie-Mellon University.
Johnston, E., and L. Van Drunen. (1988). “pricing Mortgage Pools with Heterogeneous Mortgagors: Empirical Evidence.” Working paper, University of Utah.
Kau, J.B., D.C. Keenan, W.J. Muller III, and J.F. Epperson. (1992). “A Generalized Valuation Model for Fixed-Rate Residential Mortgages,”Journal of Money, Credit and Banking 24, 279–299.
Kalbfleisch, J.D., and R.L. Prentice. (1980).The Statistical Analysis of Failure Time Data. New york: John Wiley.
McCracken, D., and W. Dorn. (1969).Numerical Methods and FORTRAN Programming. New York; John Wiley.
Pearson, N.D., and T. Sun. (1989). “A Test of the Cos, Ingersoll, Ross Model of the Term Structure of Interest Rates Using the Method of Maximum Likelihood.” Working paper, Massachusetts Institute of Technology.
Richard, S.F., and R. Roll. (1989). “Prepayments on Fixed Rate Mortgage-Backed Securities,”Journal of Portfolio Management 15, 73–82.
Schwartz, E.S., and W.N. Torous. (1989). “Prepayment and the Valuation of Mortgage-Backed Securities,”Journal of Finance 44, 375–392.
Stanton, R.H. (1995). “Rational Prepayment and the Valuation of Mortgage-Backed Securities.”Review of Financial Studies 8, 677–708.
Timmis, G.C. (1985). “Valuation of GNMA Mortgage-Backed Securities with Transaction Costs, Heterogeneous Households and Endogenously Generated Prepayment Rates.” Working paper, Carnegie-Mellon University.
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Stanton, R.H. Unobservable heterogeneity and rational learning: Pool-specific versus generic mortgage-backed security prices. J Real Estate Finan Econ 12, 243–263 (1996). https://doi.org/10.1007/BF00127536
- mortgage-backed security
- Bayesian updating
- pool-specific prices