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黃金市場中現貨與期貨價格之關聯性分析 林傳吉、梁晉嘉

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黃金市場中現貨與期貨價格之關聯性分析 林傳吉、梁晉嘉

E-mail: [email protected]

摘 要

本研究所使用的資料來源為DataStream財金資料庫之黃金期貨與現貨價格資料,期間係以2004年10月16日至2010年12月23 日,共7年計1622筆日資料。利用Hansen與Seo(2002)兩位學者所提出的門檻向量誤差修正模型(Threshold VECM)研究黃金 期貨與現貨價格之長期動態非對稱關係,預期作為當石油價格高漲時,可以黃金作為投資避險工具的參考。實證過程中,

先檢定兩變數黃金期貨與現貨價格的單根是否呈穩定狀態,結果發現兩序列經過一階差分皆為I(1)。接著經由Johansen 共整 合檢定可知存在一組共整合關係,因此說明黃金現貨與期貨價格間呈現長期均衡關係。再者,利用Wald檢定的結果得知拒 絕線性誤差修正項的虛無假設,SupLM檢定拒絕線性門檻效果的虛無假說,上述兩個檢定結果得知此門檻向量誤差修正模 型(TVECM)同時存在非線性與非對稱的特性。最後,線性與門檻向量誤差修正模型估計結果發現,無論對稱或非對稱模型 而論,黃金期貨與現貨脫離長期均衡關係(共整合關係),此時黃金現貨會下跌調整短期的價格偏離以恢復長期均衡狀態。

關鍵詞 : 門檻向量誤差修正模型、Johansen 共整合檢定、不對稱、非線性 目錄

內 容 目 錄 中文摘要 .....................iii 英文摘要 ................

.....iv 誌謝辭  .....................v 內容目錄 ................

.....vi 表目錄  .....................viii 圖目錄  ..............

.......ix 第一章  緒論...................1   第一節  研究背景與動機....

........1   第二節  研究目的...............5 第三節 研究架構與流程.......

.....6 第二章  文獻探討.................8   第一節 國外文獻............

...8   第二節  國內文獻...............13 第三章  理論模型與研究方法........

.....21   第一節  理論模型...............21   第二節  單根檢定........

.......23   第三節  共整合檢定..............26 第四節 門檻向量誤差修正模型....

......29 第四章  實證結果與分析..............33   第一節  資料來源與處理....

........33   第二節  單根檢定...............35 第三節  共整合檢定......

........36   第四節 向量誤差修正模型...........37 第五節 門檻向量誤差修正模型.....

....38 第五章  結論...................40 參考文獻................

......41 表 目 錄 表 2-1ADF和PP單根檢定.............35 表 2-2Johansen共整合檢定......

.......36 表 2-3向量誤差修正模型實證結果..........37 表 4-1門檻向量誤差修正模型實證果...

......39 圖 目 錄 圖1-1研究架構圖..................6 圖 4-1黃金期貨、現貨價格日資料的 時間序列趨勢圖...34 圖 4-2黃金期貨與現貨價格基差之日資料的時間序列趨勢圖34

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參考文獻

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