本研究探討國際投資人是否能夠藉由總體經濟指標、泰勒法則、以及匯率資料，捕捉無拋補利率平價假說的成立時間，以及判斷市場多空轉換的時間點，做好相對應的利差交易投資策略來獲得持續的超額報酬。利用時序變動型馬可夫轉換模型，分析2002年9月到2013年9月，共133個月之匯率資料，將樣本區間內的超額報酬資料根據資料特性利用模型分為兩個情境，再加入總體經濟指標變數、泰勒法則、以及匯率資料分析比較情境轉換因子對利差交易之超額報酬的關係。
經過實際驗證後的結果，發現泰勒法則雖然在文獻中扮演捕捉總體市場趨勢的變數，但在本研究之實證結果中，與利差交易之超額報酬的關係並不明顯，推測泰勒法則的合成過程可能隱瞞或消弭原始資料之資料特性。此外，觀察樣本區間內實證測試結果，發現實質匯率之資料，在景氣繁榮的金融穩定期時，能夠扮演預警的角色，因為根據二情境時序變動型馬可夫轉換模型之情境轉移機率矩陣估計的估計結果，發現實質匯率在多頭市場的情況下對於情境轉換有顯著的影響力，因此國際投資人能夠將實質匯率作為捕捉市場反轉與否的信號，建構相對應之投資策略，將情境因子列為考量，藉由預測下一期之情境使得投資人對於投資產生擇時機會，不論是發現市場將從多頭轉空，提早出場、或是預期市場會從空頭轉多，開始布局，都有助於增加利差交易之超額報酬。

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