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  • 學位論文

美國權益型REITs資產種類指數波動之不對稱探討

An Analysis of the Asymmetric Volatility of Equity REITs Property Type Index in the United States

指導教授 : 吳明哲 邱國欽
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摘要


不動產投資信託 (Real Estate Investment Trust ,簡稱REITs)在國際市場已經越來越成熟,尤其以美國是最早發展出REITs市場,制度與實務亦是最成熟的國家。REITs所扮演的投資角色為置於投資組合中,可降低該投資組合風險,並提高投資組合報酬,眾多文獻對於REITs特性作研究探討,但尚未有共同明確的結論,REITs是否與股市之間具有關聯,或者具有抗跌效果、分散風險等,在過去文獻中,大部分使用REITs指數為研究樣本,未考慮到REITs指數是由不同資產種類所組成。 本研究利用GARCH模型與GJR-GARCH模型,實證檢驗美國不同資產類型REITs波動是否具有不對稱。實證顯示,權益型REITs十六種資產種類,有療養院、工業廠房、混合型、辦公大樓及購物中心等五種資產種類,具有抗跌特性;另外,多元化、自營買賣、零售業、特殊類型建築及自助倉儲等五種資產種類,具有顯著正向槓桿效果,表示與股票市場相似,當股價下跌時,其波動會加劇,無法表現出抗跌效果。

並列摘要


REITs in the international market has become increasingly mature, particularly in the United States was among the first to develop the REITs market, procedures and practices is the most mature countries. REITs played the investment role in order to place in the portfolio and can reduce the portfolio risk and enhance portfolio returns, many literature for REITs features for study, but are not common a clear conclusion, REITs with the stock market between association, or has a defensive effect of risk diversification, and many in the literature, most of the REITs index sample for the study, not taking into account the REITs index by different types of asset composition. This research applied GARCH model and GJR-GARCH model to examine whether the asymmetric volatility and the defensive characteristics of property-type REITs. Empirical results show that 16 kinds of asset classes of equity REITs, nursing homes, industrial plants, hybrid, office buildings and shopping centers, five asset classes, with defensive characteristics; In addition, diversified, the trading Free Standing, retail, specialty and self-storage, the five asset classes, has a significant positive leverage effect, said the stock market, when prices decline, the volatility will be increased, cannot show the defensive effect.

參考文獻


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