Grané, Aurea; Martín-Barragán, Belén; Veiga, Helena - Departamento de Estadistica, Universidad Carlos III de … - 2014
Outliers of moderate magnitude cause large changes in financial time series of prices and returns and affect both the estimation of parameters and volatilities when fitting a GARCH-type model. The multivariate setting is still to be studied, but similar biases and impacts on correlation dynamics...