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A Sovereign Par Yield Curve in Dollars: A Dynamic Approach

Author

Listed:
  • Carlos Segura-Rodriguez

    (Department of Economic Research, Central Bank of Costa Rica)

  • César Ulate-Sancho

    (Department of Economic Research, Central Bank of Costa Rica)

Abstract

We estimate a weekly government debt in US dollars par yield curve for Costa Rica. To choose the estimation method, we analyze three parametric techniques: Nelson and Siegel’s method, Svensson’s method and a dynamic approach developed by Diebold et al. We use all Costa Rican sovereign debt in US dollars transactions in the primary and secondary market. We concentrate in transactions of fixed rate and zero-coupon bonds for the period between January 2009 and November 2021. The evaluation of the results from the three methods allows us to conclude that the dynamic approach shows a better balance between in-sample fit and out-of-sample forecast than static methods. The main reason is that the static methods suffer from an over-fitting problem for those weeks with a small number of observations: they fit well the observed sample, but sometimes present atypical behavior for the curve sections in which there is not available information. The dynamic method fixes this problem by using past information to estimate an expected yield curve for any week, and then only use the new weekly information to adjust the estimation in those points in which the expected yield curve is far from those observed points. Therefore, we recommend using this dynamic method for estimating this yield curve. ***Resumen: Este estudio estima una curva de rendimiento par soberana semanal en dólares para el caso de Costa Rica. Para la selección del método de estimación se analizan tres técnicas paramétricas: el método de Nelson y Siegel (1987), el método de Svensson (1994) y un enfoque dinámico propuesto por Diebold, Rudebusch y Aruoba (2006). Se utiliza información para el periodo entre enero de 2009 y noviembre de 2021 de todas las negociaciones en mercado primario y secundario de bonos tasa fija y cero cupón emitidos por el Ministerio de Hacienda. La evaluación de los tres métodos permite concluir que el método dinámico genera un mejor compromiso entre el ajuste dentro y fuera de muestra que los dos métodos estáticos. La principal razón es que los métodos estáticos presentan un problema de sobre ajuste dentro de muestra en las semanas que se observan pocas negociaciones: ajustan bien los puntos observados, pero tienden a generar comportamientos anómalos para los tramos de la curva para los que no existe información. El método dinámico resuelve este problema al utilizar la información del pasado para ajustar la curva de rendimientos que se esperaría observar durante esa semana, y solo ajustar la estimación en aquellos puntos en los que los nuevos valores observados se alejan de la curva anticipada. Por tanto, se recomienda el uso de este método dinámico para la estimación de dicha curva de rendimientos.

Suggested Citation

  • Carlos Segura-Rodriguez & César Ulate-Sancho, 2022. "A Sovereign Par Yield Curve in Dollars: A Dynamic Approach," Notas Técnicas 2210, Banco Central de Costa Rica.
  • Handle: RePEc:apk:nottec:2210
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    References listed on IDEAS

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    1. Lars E.O. Svensson, 1994. "Estimating and Interpreting Forward Interest Rates: Sweden 1992 - 1994," NBER Working Papers 4871, National Bureau of Economic Research, Inc.
    2. Nelson, Charles R & Siegel, Andrew F, 1987. "Parsimonious Modeling of Yield Curves," The Journal of Business, University of Chicago Press, vol. 60(4), pages 473-489, October.
    3. Svensson, Lars E O, 1994. "Estimating and Interpreting Forward Interest Rates: Sweden 1992-4," CEPR Discussion Papers 1051, C.E.P.R. Discussion Papers.
    4. Diebold, Francis X. & Rudebusch, Glenn D. & Borag[caron]an Aruoba, S., 2006. "The macroeconomy and the yield curve: a dynamic latent factor approach," Journal of Econometrics, Elsevier, vol. 131(1-2), pages 309-338.
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    JEL classification:

    • G12 - Financial Economics - - General Financial Markets - - - Asset Pricing; Trading Volume; Bond Interest Rates
    • E43 - Macroeconomics and Monetary Economics - - Money and Interest Rates - - - Interest Rates: Determination, Term Structure, and Effects
    • H63 - Public Economics - - National Budget, Deficit, and Debt - - - Debt; Debt Management; Sovereign Debt

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