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  • 标题:Optimisation of decay factor in time weighted (BRW) simulation: implications for VAR performance in mediterranean countries
  • 本地全文:下载
  • 作者:Žiković, Saša ; Prohaska, Zdenko
  • 期刊名称:Economic Research
  • 印刷版ISSN:1331-677X
  • 出版年度:2010
  • 卷号:23
  • 期号:1
  • 页码:73-85
  • 出版社:Juraj Dobrila University of Pula, Department of Economics and Tourism 'Dr. Mijo Mirkovic'
  • 摘要:In this paper we propose an optimisation approach to determining the optimal decay factor in time weighted (BRW) simulation. Testing of BRW simulation with different decay factors and competing VaR models is performed on a sample of nine Mediterranean countries, over a four year period that includes the ongoing financial crisis. After optimisation the BRW simulation is among the best performing tested VaR models, second only to EVT approaches. Optimising the decay factor in regards to Lopez function results in decay factor estimates that are higher than usually employed 0.97 and 0.99. The optimal decay factors are stable over time and provide significantly better backtesting results than the standard assumptions.
  • 关键词:Risk management; Value at Risk; time weighted (BRW) simulation; optimisation; decay factor; Mediterranean.
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