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  • 學位論文

證券商品風險值評估系統之模式建立---以台灣股市為例

Establishing a Securities Investment Risk Evaluation System:An Empirical Study in Taiwan Stock Market

指導教授 : 鄭雅穗
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摘要


本研究針對台灣五十成份股中統一、台塑、台積電及元大京華四家公司之週股價作實證分析,參考國內外文獻,選擇歷史模擬法及蒙地卡羅模擬法做為風險值模型,以象徵性指標及回溯測試驗證模型精確性,本研究發現在93年度由於319槍擊案此一事件導致股價波動極大,因此在歷史模擬法部份產生了風險值誤差,而蒙地卡羅模擬法在超限次數部份,表現優於歷史模擬法,也較不受極端事件影響;最後依據驗證之結果建置風險值評估系統。

並列摘要


We apply two methods, historical simulation method and Monte Carlo method, to construct the Value-at-Risk (VAR) model. The data is the weekly stock price and the selected companies are based on Taiwan 50-index. Four companies, UPEC, FPG, TSMC, and YCPS, are chosen from Taiwan 50-index for the experiment. Results show that there is a dramatic error occurred when the historical simulation method was used. This is because of the political event on March 19th, 2004. However, the results of backtesting for the Monte Carlo simulation method show that it is more robust than historical simulation method.

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