Arango, Luis Eduardo (Banco de la República) Flórez, Luz Adriana
Abstract
Taking into account the risk premium within Fisher equation and the rapid decrease of inflation in Colombia at the end of last decade we test the hypothesis of linearity for the expected inflation differentials between 6 and 12 months ahead built by assuming four different expectation mechanisms about future inflation: rational, autoregressive, static and adaptive expectations. Two sets of information are used to check the hypothesis of the Fisher effect: the return index of the official bonds traded through the Colombian Stock Market, IRTES and the cero-coupon curves. The hypothesis of linearity is rejected when expectations are forward looking. With the IRTES curve the results are those predicted by the theory regarding sing and significance. The information content of the spread of interest rates is sensitive to information set used and to the expectation mechanism.// La consideración de la prima de riesgo de inflación en la ecuación de Fisher y la rápida caída en la inflación en Colombia entre los años 1999 y 2000 nos permiten examinar la hipótesis de linealidad para los diferenciales esperados de inflación entre 6 y 12 meses adelante construidos suponiendo cuatro mecanismos de formación de expectativas de la inflación futura: expectativas racionales, autorregresivas, estáticas y adaptativas. Se emplean dos conjuntos de información para examinar la hipótesis de la existencia del efecto Fisher: el índice de rentabilidad de los títulos de endeudamiento (TES) comerciados en la Bolsa de Valores de Colombia, IRTES, y la curva cupón cero. La hipótesis de linealidad se rechaza con el mecanismo de expectativas racionales. Siempre que se usa la IRTES los resultados son los que predice la teoría en signo y significación. El contenido informativo del spread de tasas de interés es sensible al conjunto de información utilizado y al mecanismo de expectativas empleado.
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