| 研究生: |
黃致翔 Chih-Hsiang Huang |
|---|---|
| 論文名稱: |
最佳投資組合研究-以台股為例 |
| 指導教授: |
鄭光甫
Kuang-Fu Cheng |
| 口試委員: | |
| 學位類別: |
碩士 Master |
| 系所名稱: |
理學院 - 統計研究所 Graduate Institute of Statistics |
| 畢業學年度: | 92 |
| 語文別: | 中文 |
| 論文頁數: | 71 |
| 中文關鍵詞: | 資產配置 、時間序列模型 、混合常態分配模型 |
| 外文關鍵詞: | Markowitz, ARMA, EM-algorithm, ARCH |
| 相關次數: | 點閱:11 下載:0 |
| 分享至: |
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摘 要
過去應用Markowitz的投資組合模型之相關研究,通常是根據過去的歷史資料分析投資工具的期望報酬與標準差,而計算出效率前緣之投資組合。但事實上,過去的金融與經濟環境不一定能持續到未來,所以最佳資產配置的選擇雖可參考過去的經驗,但仍應對未來金融資產的報酬率、標準差、共變異數做預測,並進行調整以降低資產配置決策錯誤的可能性。本文利用時間序列的AR模型、ARIMA模型、ARCH模型分別對各個股票未來的報酬率、共變異數、變異數先行預測,再利用每一週的預測結果計算最佳資產配置。除此之外,也用常態分配模型和混合常態分配模型對過去的歷史資料作配適,得到了新的模型。實證結果顯示,在沒有賣空機制和有賣空機制下,用時間序列配置的模型明顯優於傳統MV模型和用常態分配模型和混合常態分配模型所建立的資產配置。
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