The Relationship Between Energy Spot And Futures Prices: Evidence From The Australian Electricity Market
Worthington, Andrew C. & Higgs, Helen (2004) The Relationship Between Energy Spot And Futures Prices: Evidence From The Australian Electricity Market. ICFAI Journal of Applied Economics, 3(4), pp. 65-82.
This paper examines the relationship between futures and spot electricity prices for two of the Australian electricity regions in the National Electricity Market (NEM): namely, New South Wales and Victoria. A generalised autoregressive conditional heteroskedasticity (GARCH) model is used to identify the magnitude and significance of mean and volatility spillovers from the futures market to the spot market. The results indicate the presence of positive mean spillovers in the NSW market for peak and off-peak (base load) futures contracts and mean spillovers for the off-peak Victorian futures market. The large number of significant innovation and volatility spillovers between the futures and spot markets indicates the presence of strong ARCH and GARCH effects. Contrary to evidence from studies in North American electricity markets, the results also indicate that Australian electricity spot and futures prices are stationary.
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