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Volatility clustering is a well-known stylized feature of financial asset returns. This paper investigates asymmetric … pattern in volatility clustering by employing a univariate copula approach of Chen and Fan (2006). Using daily realized kernel … volatilities constructed from high frequency data from stock and foreign exchange markets, we find evidence that volatility …
Persistent link: https://www.econbiz.de/10011209871
We propose to forecast the Value-at-Risk of bivariate portfolios using copulas which are calibrated on the basis of nonparametric sample estimates of the coefficient of lower tail dependence. We compare our proposed method to a conventional copula-GARCH model where the parameter of a Clayton...
Persistent link: https://www.econbiz.de/10011264647
Measuring dependence in a multivariate time series is tantamount to modelling its dynamic structure in space and time. In the context of a multivariate normally distributed time series, the evolution of the covariance (or correlation) matrix over time describes this dynamic. A wide variety of...
Persistent link: https://www.econbiz.de/10005677944
Risk diversification is the basis of insurance and investment. It is thus crucial to study the effects that could limit it. One of them is the existence of systemic risk that affects all the policies at the same time. We introduce here a probabilistic approach to examine the consequences of its...
Persistent link: https://www.econbiz.de/10010832994
Risk diversification is the basis of insurance and investment. It is thus crucial to study the effects that could limit it. One of them is the existence of systemic risk that affects all the policies at the same time. We introduce here a probabilistic approach to examine the consequences of its...
Persistent link: https://www.econbiz.de/10010899196
Expected Shortfall (ES) has been widely accepted as a risk measure that is conceptually superior to Value-at-Risk (VaR). At the same time, however, it has been criticized for issues relating to backtesting. In particular, ES has been found not to be elicitable which means that backtesting for ES...
Persistent link: https://www.econbiz.de/10010821003
Risk diversification is the basis of insurance and investment. It is thus crucial to study the effects that could limit it. One of them is the existence of systemic risk that affects all of the policies at the same time. We introduce here a probabilistic approach to examine the consequences of...
Persistent link: https://www.econbiz.de/10011030572
Necessary and sufficient conditions for the subadditivity of Value-at-Risk (V aRα) for portfolios of bonds are presented under various dependence assumptions. For sufficiently large α, V aRα is subadditive. However, for any α one can construct portfolios for which V aRα is superadditive.
Persistent link: https://www.econbiz.de/10011189346
simple model free volatility in a high frequency world, arbitrage-free implied volatility surfaces for options on single … liquidity shock, separating information maximum likelihood estimation of the integrated volatility and covariance with micro … illustrations, EVT and tail-risk modelling, with evidence from market indices and volatility series, the economics of data using …
Persistent link: https://www.econbiz.de/10010860064
and volatility series, the economics of data using simple model free volatility in a high frequency world, arbitrage … integrated volatility and covariance with micro-market noise, stress testing correlation matrices for risk management, whether …-free implied vola-tility surfaces for options on single stock futures, the non-uniform pricing effect of employee stock options …
Persistent link: https://www.econbiz.de/10010907402