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 … simple model free volatility in a high frequency world, arbitrage-free implied volatility surfaces for options on single …

The paper proposes a general asymmetric multifactor Wishart stochastic volatility (AMWSV) diffusion process which …

volatility models. We propose a continuous timefractionally integrated Wishart stochastic volatility (FIWSV) process. We derive …

Since Black (1976), the source of the stock price volatility smirk has remained a controversy. The volatility smirk is … volatility smirk, both for time series and cross sections of companies. These results may help to disentangle the leverage effect … from other potential explanations like volatility feedback, the time-varying risk premium, and a down-market effect. …

Although the main interest in the modelling of electricity prices is often on volatility aspects, we argue that … towards volatility features of the time series.For the older electricity market of Nord Pool in Norway, it is found that a …

process, at present this is not the case for the Heston stochastic volatility model, where the variance is modelled as a …