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台灣不動產投資信託基金具有防禦性嗎?

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Review of Securities and Futures Markets, 23:3, 199-224 (2011) 199

台灣不動產投資信託基金

具有防禦性嗎?

蔡怡純* 陳明吉 張光亮

一直以來不動產及其衍生證券都被視為是較低風險的資產,因 此 本 研 究 探 討 國 內 不 動 產 投 資 信 託 基 金 (real estate investment trusts,REITs) 是否也具有這樣的防禦性特質。以往對於 REITs 相 對 於 股 市 的 抗 跌 性 、 防 禦 能 力 的 研 究 , 如 Glascock (1991) 和 Glascock, Michayluk and Neuhauser (2004) 都涉及以主觀的外生方 式對「熊市」給予定義後,再進一步觀察 REITs 是否能在這樣的市 場中不受波及,本文則以馬可夫過程建立實證模型以內生方式補捉 股 市高 度 波 動 的時 期 , 然 後觀 察 在 這 樣的 股 市 大 幅上 漲 或 下 跌時 期,國內的 REITs 指數與股市的相關性是否有所變化。結果令人意 外的是,國內的 REITs 不僅不具防禦性,甚至其投資人承受了負向 的風險回饋,此原因可能是由於國內此市場尚屬新興,資產合理評 價不易、投資人對該市場的認知不明所造成的。 關鍵詞:不動產投資信託基金、防禦性、風險、馬可夫轉換。 * 作者衷心感謝主編洪茂蔚教授,以及兩位匿名審查者給予寶貴的意見,並感謝國科會補助【計劃編 號: NSC 96-2416-H-218-019】。本文作者依序為國立高雄大學金融管理學系副教授,國立中山大學 財務管理學系教授(聯繫作者),國立嘉義大學應用經濟學系副教授。

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台灣不動產投資信託基金具有防禦性嗎?

223

Are REITs in Taiwan Defensive?

I-Chun Tsai

Associate Professor, Department of Finance, National University of Kaohsiung

Ming-Chi Chen

Professor, Department of Finance, National Sun Yat-sen University

Kuang-Liang Chang

Associate Professor, Department of Applied Economic, National Chiayi University

Real estate and its related assets are commonly regarded as assets with relatively lower risk; this research analyzes whether REITs (Real Estate Investment Trusts) in Taiwan are also defensive. This study improves the problem of subjectively defining market conditions, such as in previous studies of Glascock (1991) and Glascock, Michayluk and Neuhauser (2004), by using the Markov switching model to capture periods of high volatility in the Taiwan Stock market. The current investigation uses these indicators to test whether REIT returns respond asymmetrically in such highly volatile markets. Surprisingly, REITs in Taiwan are not defensive, and investors gain negative returns by bearing the risk. This finding may be because REIT is a new asset market where investors have not yet realized the true value of this asset and the characteristics of this asset market.

Key Words: Real Estate Investment Trusts, Defensive, Risk, Markov

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