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題名:Asymmetric Volatility: Pre and Post Asian Financial Crisis
書刊名:管理學報
作者:楊踐為 引用關係游淑禎
作者(外文):Yang, Jack J. W.You, Shwu-jen
出版日期:2003
卷期:20:4
頁次:頁805-827
主題關鍵詞:波動性不對稱EGARCH模型亞洲金融風暴Asymmetric volatilityEGARCHAsian financial crisis
原始連結:連回原系統網址new window
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  • 被引用次數被引用次數:期刊(1) 博士論文(0) 專書(0) 專書論文(0)
  • 排除自我引用排除自我引用:1
  • 共同引用共同引用:5
  • 點閱點閱:70
很多研究都發現金融資產之報酬率存在波動性不對稱現象,此不對稱現象主要反映投資人對壞訊息比對好訊息產生較強烈的反應。鑑於投資人在遭受重大財物損失後風險規避程度增加,壞消息所產生的衝擊變得更嚴重,本研究以EGARCH模型驗證金融風暴後亞洲股票市場波動性更加不對稱之假說。以香港、日本、馬來西亞、新加坡、南韓、泰國與台灣股市日報酬資料進行之研究結果顯示,除泰國外,其餘股票市場的波動性不對稱程度,在金融風暴後皆顯著增加,符合預期假說。
The asymmetric response of volatility to return shocks has been well evidenced for various financial assets. The asymmetric volatility reflects investors' stronger reaction to bad news than to good news. Investors become more risk averse and overweigh the potentials of negative news once when they suffer severe loss. Thus it is hypothesized that the asymmetric effect gets more prominent after the precipitous fall of stock returns during Asian financial crisis. An EGARCH model, capturing the time varying volatility with asymmetric responses to innovations, is employed in examining daily stock return series for Hong Kong, Japan, Malaysia, Singapore, South Korea, Taiwan, and Thailand. A higher degree of asymmetry after the Asian financial crisis is confirmed for these markets except Thailand.
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