1997年7月2日從泰國爆發了貨幣危機,這股風暴馬上襲擊鄰近國家的貨幣市場及股票市場,在1998年底韓國貨幣的重貶時達到最高點,台灣也無法倖免這次的衝擊。之後國際金融商品不斷的創新與開發,金融商品證劵化成為投資寵兒,吸引國際資本不斷的湧進。相隔十年,2007年在美國政府不斷的調高利率下,造成房市的崩跌,觸發了次級房貸危機,引發對金融商品的不安,連帶一連串金融機構巨額虧損,更陷入嚴重流動性的不足,在2008年9月15日雷曼兄弟投資銀行宣布破產,正式爆發出來。 本研究主要目的是想要透過兩次金融危機分析股票市場的變動,以事件研究模型比較兩次金融事件對台灣的所造成的影響程度。本文以貨幣危機中,在1997年7月2日泰國放棄與美元的維持已久的固定匯率改為自由浮動與2008年9月15日雷曼兄弟投資銀行宣布破產此二日為重大事件日,以事件研究法來進行實證分析,探討兩個不同時期的金融風暴對各類股是否有異常報酬率的產生以及其差異,進一步探討兩個事件對於不同的產業是否有不同程度的影響。 本研究之實證結果發現,兩個不同的金融風暴對各類股的上市股票皆有異常報酬的產生,但卻有不同程度的影響,其中2008年雷曼兄弟破產事件對於各類股皆有較顯著的負異常報酬率。而在累積平均異常報酬率(CAR)的趨勢圖中,可發現兩個金融風暴事件對於各類股也有不同程度的影響,雷曼兄弟事件對台灣的影響相較於貨幣危機更為嚴重。
The currency crisis erupted from Thailand on July 2 , 1997,because the Thailand government abandon the U.S. dollar to maintain long fixed rate of exchange to free float, triggering a crisis of unprecedented financial market in Thailand.This storm attacked the money market and the stock market of the neighboring country immediately. Is separated by for ten years, the U.S. government continued to raise interest rates in 2007, resulting in the collapsing housing market, triggered the subprime mortgage crisis, and a series of huge losses related financial institutions. On September 15, 2008 Lehman Brothers investment bank declared bankruptcy officially broke out. The main purpose of this study is to compare the two financial turmoil on the extent of the impact of Taiwan by using the event study model. In this paper, July 2, 1997 in Thailand to abandon the dollar to maintain long-fixed exchange rate to float freely and September 15, 2008 Lehman Brothers investment bank declared bankruptcy as two major event day. The event study method to empirical analysis financial turmoil of two different periods on the various types of abnormal stock returns are generated or not and their differences. The empirical results of this study found that two different financial turmoil for various types of shares have the production of abnormal returns, but there are different degrees of impact,among Lehman Brothers bankruptcy in 2008 for various types of shares have more significant negative abnormal returns. According to the cumulative average abnormal return (CAR) trend chart can be found that two financial turmoils for various types of shares have different degrees of impact, Lehman Brothers impact on Taiwan''s more serious than currency crisis.