Velásquez Giraldo, Mateo; Gutiérrez Betancur, Juan Carlos - In: Journal of economics, finance & administrative science 21 (2016) 41, pp. 73-80
Calibration of the Nelson-Siegel (NS) model to adjust to sovereign yield curves has been found to be problematic since the model exhibits a correlation between its factors, and generates objective functions with local multiple optima. These problems are often disregarded in the Colombian market,...