Abstract
The European Union Emissions Trading System (EU ETS) is the main international carbon trading market, in which European Union CO2 allowances (EUAs) are traded with increasing intensity. In order to help the market participants mitigate the market price risk, one possible way is to analyze the time range of market efficiency and the price discovery mechanism of EUA futures market and spot market. For this purpose, the paper provides the unit root test and the cointegration test for the EUA futures market during 2009–2011. Our result shows that the EUA futures market is efficient within 1month. Furthermore, it illustrates that the impact of the price will continue for 3months, examined by a vector error correction model (VECM).
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