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系統識別號 U0002-1203200723361100
中文論文名稱 美國資本市場效率性檢定
英文論文名稱 The Efficiency Tests of American Capital Markets
校院名稱 淡江大學
系所名稱(中) 財務金融學系碩士在職專班
系所名稱(英) Department of Banking and Finance
學年度 95
學期 1
出版年 96
研究生中文姓名 高淑華
研究生英文姓名 Shu-Hua Kao
電子信箱 shara@hncb.com.tw
學號 793490375
學位類別 碩士
語文別 中文
口試日期 2007-01-07
論文頁數 53頁
口試委員 指導教授-邱建良
指導教授-陳玉瓏
委員-林卓民
委員-李命志
委員-邱哲修
中文關鍵字 效率性  變異比率檢定  異質性  同質性 
英文關鍵字 Efficiency  Variance Ratio Test  Heteroscedasticity  Homoscedasticity 
學科別分類
中文摘要 本文採用Lo and MacKinlay(1988、1989)之傳統變異比率檢定法,及Wright(2000)的無母數變異比率檢定法--秩與符號,探討美國股票、外匯、原油與黃金四個主要市場的市場效率性。由於過去的文獻在探討市場效率時,普遍未嚴謹考慮資產價格是否存在序列相關及異質變異數之現象,而造成檢定效力不彰、結果不一致的問題。
本研究改善過去之不足,除採用Lo and MacKinlay(1988、1989)所提之傳統變異比率檢定,並以Wright(2000)所提出的無母數變異比率檢定--秩與符號,考量資產價格存在異質變異數下進行檢定,並根據各個市場所發生的重大事件、制度改變、政府管制等改變,進行次樣本分析,以避免資料在全樣本期間下可能會受到時間移轉的影響,而抵消掉不具效率性的因素及效果,使其提升評估市場效率之檢定力。實證結果顯示,在制度改變或政府管制等改變之後的次樣本期間,外匯市場--英鎊對美元之即期匯率及黃金市場--紐約商品交易所之黃金現貨價格,具有效率性。而原油現貨及S&P500股票市場,在制度改變或政府管制等改變之後的次樣本期間,在不同觀察值間隔(K)下,均不具效率性。
英文摘要 In this study, we apply both traditional variance ratio test proposed by Lo and MacKinlay(1988、1989)and nonparametric variance ratio test proposed by Wright(2000), to investigate the efficiency of American stock, foreign exchange, oil, and gold markets. Reviews of the past papers show that the test results, due to the ignorance of the serial correlation and heteroscedasticity, are mostly inconsistence in testing market efficiency.
We improve the results by using both variance ratio test proposed by Lo and MacKinlay(1988、1989)and non-parametric variance ratio test proposed by Wright(2000), under the consideration of heteroscedasticity. Dividing the whole sample period into two subperiods according to important event, rule change and government regulation also vastly improve the test result. The test experiments in this paper show that both the exchange rate market for Pound to US Dollar and the gold market are efficient in the subperiods after rule change and after government regulation. However, both oil market and S&P500 stock market are inefficient under various observation durations (K) in the subperiods after rule change and after government regulation.
論文目次 目 錄

第一章 緒論 1
第一節 研究動機 1
第二節 研究目的 4
第三節 研究架構 5
第四節 研究流程 6
第二章 理論基礎及文獻回顧 7
第一節 效率市場 7
第二節 國內相關文獻 11
第三節 國外相關文獻 15
第三章 研究方法 17
第一節 單根檢定 17
第二節 異質性檢定 21
第三節 變異數比率檢定模型 23
第四章 實證結果與分析 27
第一節 資料來源與處理 27
第二節 基本統計量分析 28

第三節 單根檢定 31
第四節 異質性檢定 34
第五節 變異數比率檢定 35
第五章 結論 47
參考文獻 48

表 目 錄

【表1】各標的資產之基本統計量 30
【表2】各標的資產序列資料水準項之單根檢定(ADF單根檢定法) 32
【表3】各標的資產序列資料水準項之單根檢定(PP單根檢定法) 32
【表4】各標的資產序列資料差分項之單根檢定(ADF單根檢定法) 33
【表5】各標的資產序列資料差分項之單根檢定(PP單根檢定法) 33
【表6】各標的資產異質性檢定 34
【表7】全樣本下各標的資產之變異比率檢定 36
【表8】次樣本下之S&P500股價指數及英鎊對美元即期匯率之變異比率檢定 43
【表9】次樣本下之西德州原油及紐約交易所黃金現貨之變異比率檢定 44

圖 目 錄

【圖1】各標的資產原始序列圖 29
【圖2】黃金現貨報酬,運用Wright(2000)無母數檢定-R1 38
【圖3】黃金現貨報酬,運用Wright(2000)無母數檢定-R2 38
【圖4】原油現貨報酬,運用Wright(2000)無母數檢定-R1 39
【圖5】原油現貨報酬,運用Wright(2000)無母數檢定-R2 39
【圖6】S&P500股價指數現貨報酬,無母數檢定-R1 40
【圖7】S&P500股價指數現貨報酬,無母數檢定-R2 40
【圖8】英鎊對美元之即期匯率報酬,無母數檢定-R1 41
【圖9】英鎊對美元之即期匯率報酬,無母數檢定-R2 41
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