RT Report
T1 Forecasting Value-at-Risk Using Block Structure Multivariate Stochastic Volatility Models
A1 Asai, Manabu
A1 Caporin, Massimiliano
A1 McAleer, Michael
AB Most multivariate variance or volatility models suffer from a common problem, the “curse of dimensionality”. For this reason, most are fitted under strong parametric restrictions that reduce the interpretation and flexibility of the models. Recently, the literature has focused on multivariate models with milder restrictions, whose purpose was to combine the need for interpretability and efficiency faced by model users with the computational problems that may emerge when the number of assets is quite large. We contribute to this strand of the literature proposing a block-type parameterization for multivariate stochastic volatility models. The empirical analysis on stock returns on US market shows that 1% and 5 % Value-at-Risk thresholds based on one-step-ahead forecasts of covariances by the new specification are satisfactory for the period includes the global financial crisis.
YR 2012
FD 2012-03
LK https://hdl.handle.net/20.500.14352/49062
UL https://hdl.handle.net/20.500.14352/49062
LA eng
DS Docta Complutense
RD 18 abr 2025