不同股市的報酬關聯隨時間動態改變，本研究欲了解近期美國、台灣與亞太地區的中國大陸、香港、日本及韓國的報酬連動關係，並進一步觀察次級房貸風暴期間美股對這些地區的關聯改變趨勢。本論文採用灰色理論與時間序列兩種方法，實證發現次級房貸風暴發生期間，台股及亞太地區主要指數不論在報酬率或是報酬率波動性受美股影響的程度大多增強。 實證結果顯示，在風暴期間的報酬率傳導關係，亞太以韓國影響台股最顯著，美股則全面影響亞太指數；在報酬率波動性溢傳上，亞太以日本、美股以道瓊工業影響台股最強，台股則是電子類股被美股影響最重，但營建類股在與美股或是亞太指數的關聯趨勢變化卻最明顯。另外，灰關聯分析對時間序列檢定的關聯組合可以提供互補的關聯強弱關係說明，且具有相當的正確性。 / Connections between stock markets are dynamically changing, and it affects investor's transnational investment portfolio. We focus on the relationships of stock markets among the United States, Taiwan, Japan, Korea, China and Hong Kong, and eager to understand the connection tendency between Untied States and Asian-Pacific area during the subprime mortgage crisis period. The identified research methods are time series and grey theory, including Granger causality test, GARCH model and grey relational analysis. We find out the returns and volatility in Asian-Pacific stock markets were all affected increasly by U.S. market during the subprime mortgage crisis. The main empirical results are as follows: In the relationships of returns, Korea affects Taiwan mostly in the Asian-Pacific area, and U.S. market affects all the others entirely during the subprime crisis. In the relationships of volatility, Japan and Dow Jones index affects Taiwan deeply during the period; within all the Taiwan indexs, Electronic Sector Index was affected by the U.S. market mostly than others during the same period, but the connection tendency in the Construction Sector Index with other markets changes more obviously. Otherwise, grey relational analysis can provide complementary explainations as compared to time sereies in the strength of relationships, and the explainations are with plenty credibility.

美國次級房貸風暴自2007年7月爆發以來，除重創金融市場外，亦導致相關會計準則之修訂。本研究以我國金融業為對象，探討：（1）以公平價值認列之金融商品及相關金融資產負債之損益，其財務報導是否具有價值攸關性；（2）金融資產減損損失對投資人之影響是否重大；（3）可能產生減損損失之金融資產其財務報導是否具有價值攸關性；以及（4）財務會計準則第34號公報第二次修訂對投資人之影響為何。 / 本研究之主要發現如下：（1）以公平價值認列之金融商品具有價值攸關性，亦即其對投資人具有參考價值；（2）金融資產減損損失及無活絡市場之債券投資具有價值攸關性，金融資產減損損失增加時，會降低公司之價值，而影響投資人決策；以及（3）第34號公報第二次修訂之內容，對股價具有負向之解釋能力，亦即投資人並不認為金融商品重分類規定之放寬，有助於降低金融風暴對於金融業可能帶來的衝擊。 / Since the U.S. subprime mortgage crisis broke out in July, 2007, it not only inflicted heavy losses to global financial markets, but also caused changes in accounting standards. Using the financial industry in Taiwan as research sample, this study examines: (1) whether financial instruments measured at fair value and their reported gains and losses in the financial statements have value-relevance; (2) the influence of impairment losses of financial assets; (3) whether the financial instruments related to impairment losses of financial assets are value-relevant; and (3) the influence to investors before and after the Statements of Financial Account Standard (SFAS) No. 34 second revised. / This study’s major findings are as follows. The financial instruments measured at fair value are value-relevant and can provide incremental information to investors. Impairment losses on financial assets and non-active market investments also have value-relevance. If a company has more impairment losses on its financial assets, it may negatively affect the firm’s value and change investors’ decisions. As for the second revision of SFAS No. 34, it did not reverse investors’ expectations of the negative effect of the aforementioned financial crisis on the financial industry in Taiwan.