本研究為討探投資人是否可透過捕捉無拋補的利率平價說的成立期間以及預測其反轉時機，建構對應的投資策略以獲得顯著且持續的超額報酬，故採用情境轉換模型，以馬可夫鏈描述情境轉換行為，分析1999年至2012年的七個已開發經濟體的外匯資料，透過將樣本期間區分為三種情境，根據各情境特性決定相對應之最適資產配置，並以預期情境轉換機率決定投資組合調整時機，模擬投資人在現有可得資訊下所做的投資決策以檢定此投資策略是否能提升利差交易者的投資績效。 根據樣本外實證測試結果，考慮情境因子的模擬投資策略之報酬在99%的信賴水準下顯著優於買進持有利差交易策略，且可有效降低風險，在無拋補的利率平價說成立的景氣低迷時期投資策略表現尤佳，顯示納入情境因子的考量有助提升資產配置效率，藉由預期下一期的情境可使進行利差交易的投資人具備擇時機會，幫助預測未來景氣走勢並於空頭市場時承擔較低的風險並獲得相對優異的風險調整後報酬。

台灣近年來逐漸放寬外匯及金融的管制措施，使得台灣與國際間的資本移動愈趨活絡，而國際間利息套利活動的發生，使得各國的外匯與金融市場相互結合在一起，匯率與利率相互影響且其關係愈形密切，當資本可以自由移動時，每個時點兩國間利率的差異應等於預期的即期匯率變動率，此時無拋補利率平價說成立。 在實證方法上，本文擬以Djckey & Fuller(1979, 1981) ADF檢定，及Johansen (1988)最大概似共積估計法，對UIP進行實證分析。由於政府在各期間放寬資本管制的幅度不同，因此本文將實證期間區分成三個階段，分別為資本管制初步開放、逐步放寬與大幅開放三段期間，對台灣地區從事UIP的檢定。實證結果發現： (1)在資本管制初步開放的第一段期間，國內外資產報酬率不具有共整合關係，UIP不成立。 (2)在資本管制逐步放寬的第二段期間，國內外資產報酬率雖具有共整合關係，但是UIP不成立，表示資本移動性雖然較第一段期間提高，但仍有其限制性。 (3)在資本管制大幅開放的第三段期間，國內外資產報酬率不僅具有共整合關係，且UIP成立，表示在資本移動性相對大的階段，由本文實證檢定結果發現，UIP確實是成立的。 / In order to assess the degree of capital mobility of Taiwan in the sense of uncovered interest parity, this paper attempts to estimate the relationship between the return rate of domestic asset and the return rate of foreign asset with cointegration. Main conclusions are: In the first period(1985:9-1989:6), the return rate of domestic asset and foreign asset are not cointegrated by themselves. In the second period(1989:7-1993:12),a unique long- run relationship between these two variables can't be rejected. But the hypothesis of uncovered interest parity is rejected. These empirical evidences imply that capital is not freely mobile in the first and second period. However, in the third period(1994:l- 1998:3),with fewer financial regulations, a unique long-run relationship between these two variables can't be rejected. In addition, the coefficient of the return rate of foreign asset is insignificantly different from 1. It means that capital can moves most free in recent years.

歐元的問世，代表的是從1970年代固定匯率被打破以來，世界金融體系最大一次的變革，其對全球之金融及社會文化有很深遠的意義；因此，有關美國與歐元區間之匯率、利率及物價關係的探討遂成為國際金融市場所關心的焦點之一；本文以Frankel (1992)所提出衡量國際間資本移動性的三種利率平價說：拋補利率平價說(Covered Interest Parity，CIP) 、無拋補利率平價說 (Uncovered Interest Parity，UIP)、實質利率平價說 (Real Interest Parity，RIP)為基礎，來檢驗此三種利率平價說是否成立。在實證方法上，本文以Dickey & Fuller (1979,1981)之ADF單根檢定來確定變數之數列特性，再採Johansen (1988)之最大概似估計法，對CIP、UIP與RIP進行實證分析。實證結果發現，於1999 年 1 月至 2004 年 7 月期間，美國與歐元區間 CIP 與 UIP 同時成立，表示當兩國資產報酬率有差異時，可以經由國際間資本的移動，使得報酬率最後有趨於相等的傾向；並且接受遠期匯率為未來即期匯率的不偏估計值之虛無假設，顯示歐元與美元間外匯市場具有效率性。另外，本文之實證結果並不支持 RIP 的成立，其有可能歐元區與美國在編制物價指數時，所使用的物價項目和比重情況不同而異，因此難以表示出公正之匯價；再者由於現實之貨幣、商品市場之不完全，與人民不一定能完全預期及存在貨幣幻覺等許許多多未考慮因素下，故在諸多驗證 RIP之文獻中，亦大多顯示無法找到其均衡之平價關係。 / The emergence of Eurodollar exemplified a significant reformation in the world financial system since the fixed rate had been broken in 1970, which brings far-reaching significance to the global finance and social culture. Therefore some discussions on exchange rate, interest rate and price relationship in the range of US Dollar and Eurodollar are one of focuses the international financial market concerns; On the basis of the three kinds of interest rate parity Frankel brought forward (1992) including Covered Interest Parity (CIP), Uncovered Interest Parity (UIP) and Real Interest Parity (RIP), this research mainly proves their feasibility. For the empirical methods, the Dickey & Fuller (1979, 1981)’s ADF unit root test was used to confirm the characteristics of variable series in this research; additionally, Johansen’s maximum likelihood method (1988) was adopted to do the empirical analysis on CIP, UIP and RIP. Based on the empirical results, we found out that the CIP and UIP are tenable simultaneously in the range of tenable US Dollar and Eurodollar from 1999 January to 2004 July. That means when return on asserts between two counties has some differences, it would become towards equality lastly on the basis of international capital mobility. And the null hypothesis that the forward rate is an unbiased predictor of the future spot rate can be employed, revealing the foreign exchange market in the range of Eurodollar and US Dollar has certain efficiency. Additionally, The empirical results of this research do not support the RIP, because it would vary with different prices and proportion used while making the price index in the range of Eurodollar and US Dollar, and cannot present equitable exchange rate; furthermore, because of imperfect current currency and commodity markets, and many unconsidered factors such as people’ incompletely anticipation and money illusion, most researches for validating RIP fail to find out its balanced parity relation.