Showing 1 - 10 of 281
generally, to observation-driven models, which include well-known models for conditional volatility. To overcome the problem of … Monte Carlo study and an empirical study concerning the measurement of conditional volatility from financial returns data. …
Persistent link: https://www.econbiz.de/10011794421
Novel periodic extensions of dynamic long memory regression models with autoregressive conditional heteroskedastic errors are considered for the analysis of daily electricity spot prices. The parameters of the model with mean and variance specifications are estimated simultaneously by the method...
Persistent link: https://www.econbiz.de/10010325542
We characterize the dynamic properties of Generalized Autoregressive Score (GAS) processes by identifying regions of the parameter space that imply stationarity and ergodicity. We show how these regions are affected by the choice of parameterization and scaling, which are key features of GAS...
Persistent link: https://www.econbiz.de/10010326396
generally, to observation-driven models, which include well-known models for conditional volatility. To overcome the problem of … Monte Carlo study and an empirical study concerning the measurement of conditional volatility from financial returns data. …
Persistent link: https://www.econbiz.de/10011819528
We revisit Wintenberger (2013) on the continuous invertibility of the EGARCH(1,1) model. We note that the definition of continuous invertibility adopted in Wintenberger (2013) may not always be sufficient to deliver strong consistency of the QMLE. We also take the opportunity to provide other...
Persistent link: https://www.econbiz.de/10011401308
This paper considers spot variance path estimation from datasets of intraday high frequency asset prices in the presence of diurnal variance patterns, jumps, leverage effects and microstructure noise. We rely on parametric and nonparametric methods. The estimated spot variance path can be used...
Persistent link: https://www.econbiz.de/10011379469
We propose a new class of observation-driven time-varying parameter models for dynamic volatilities and correlations to handle time series from heavy-tailed distributions. The model adopts generalized autoregressive score dynamics to obtain a time-varying covariance matrix of the multivariate...
Persistent link: https://www.econbiz.de/10011380135
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 …
Persistent link: https://www.econbiz.de/10011334362
improved volatility measurements but has also inspired research into their potential value as an information source for … volatility forecasting. In this paper we explore the forecasting value of historical volatility (extracted from daily return … series), of implied volatility (extracted from option pricing data) and of realised volatility (computed as the sum of …
Persistent link: https://www.econbiz.de/10011334848
In this paper we aim to measure actual volatility within a model-based framework using high-frequency data. In the … at smaller and smaller time intervals. High-frequency returns are used for the computation of realised volatility. Recent … theoretical results have shown that realised volatility is a consistent estimator of actual volatility but when it is subject to …
Persistent link: https://www.econbiz.de/10011342558