Blar i Bidrag fra ansatte på forfatter "Westgaard, Sjur"
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Covariance estimation using high-frequency data : an analysis of Nord Pool electricity forward data
Lien, Gudbrand; Haugom, Erik; Westgaard, Sjur; Solibakke, Per Bjarte (Journal article, 2012)The modeling of volatility and correlation is important in order to calculate hedge ratios, value at risk estimates, CAPM betas, derivate pricing and risk management in general. Recent access to intra-daily high-frequency ... -
Modelling day-ahead Nord Pool forward-price volatility: realized rolatility versus GARCH models
Haugom, Erik; Westgaard, Sjur; Solibakke, Per Bjarte; Lien, Gudbrand (Journal article, 2011)The argument that better volatility estimates can be obtained by using standard time-series techniques on non-parametric volatility measures constructed from high- frequency intradaily returns has been prevalent over the ... -
On the Estimation of Extreme Values for Risk Assessment and Management: The ACER Method
Dahlen, Kai Erik; Solibakke, Per Bjarte; Westgaard, Sjur; Næss, Arvid (Peer reviewed; Journal article, 2015)In this paper we use an Average Conditional Exceedance Rate (ACER) method to model the tail of the price change distribution of daily spot prices in the Nordic electricity market, Nord Pool Spot. We use an AR-GARCH model ...