Um estudo da estrutura a termo de taxas de juros de títulos públicos prefixados e o modelo de Svensson

Abstract

The Term Structure of Interest Rates (TSIR) is an essential element for the formulation of monetary policy. It is able to indicate the expectations of the financial market in relation to future interest rates. In this work we study the formation of TSIR with a greater focus on the mathematics involved, since in the literature this subject is generally treated only with a focus on economics. We prove the mathematical relation between spot, future and instantaneous interest rates. We also study the empirical mathematical model of forecasting the interest curve proposed by Lars E. O. Svensson (SVENSSON, 1994). This model is easy to apply since it requires few parameters to adjust the interest curve. For this reason, this model has been widely used by Central Banks of several countries, including the Central Bank of Brazil. We conclude with an application of the Svensson (SVENSSON, 1994) model using the prices of fixed-rate Treasury Direct securities.