摘要:The paper uses Lévy processes and bivariate Lévy copulae in order to model the behavior of intraday log-returns.Based on assumptions about the form of marginal tail integrals and a Clayton Lévy copula, the model allows for capturing intraday cross-dependency.The model is applied to VaR of the portfolios constructed on stock returns as well as on cryptocurrencies.The proposed method shows fair performance compared to classical time series models.
关键词:Lévy copula ; VaR ; backtesting ; cryptocurrency