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  • 學位論文

台灣上市櫃公司併購宣告對股價影響之研究

The Effect of Public-Listed Companies’ Merger and Acquisition Deal Announcement on the Stock Price in Taiwan

指導教授 : 余士迪 蔡子皓

摘要


本研究欲衡量併購宣告資訊與股價變動的關聯性,以台灣上市(櫃)公司併購事件為研究對象,第一部分以事件研究法探討併購資訊宣告前後所引起股價的變動,並觀察是否有產生異常報酬。第二部分探討台灣上市(櫃)公司是否有溢價併購之現象。再運用迴歸模型探討公司規模、併購支付方式與併購地點等變數是否與控制權溢價有所關聯。實證結果發現: 一、主併公司在併購宣告日前有幾天出現顯著異常報酬,但在宣告日後並無出現顯著異常報酬,表示在主併公司方面,並無一定會使股價上漲或下跌,端看投資人對於此併購宣告之信心程度而定。 二、以目標公司來看,目標公司擁有正向且較高的異常報酬,且在併購宣告前就產生正的異常報酬,可能代表消息提前洩漏或有內線交易產生,而在宣告日後產生正向報酬除了表示投資人對於此併購案很有信心,並期望能藉此進行併購套利而獲利。 三、本研究樣本皆有出現控制權溢價情形表示主併公司為了要在公開交易的市場成功取得目標公司之股份,通常必須支付高於市場交易價格之溢酬。 四、公司相對規模比會影響控制權溢價具有正向關連性。

並列摘要


This study investigates on (1). the relationship between the Taiwanese Public listed companies’ M&A deals announcement and stock prices and apply the “Event Study” to analyze if any abnormal returns of acquiring companies and target companies’ stock; (2). if the control premium happens; and (3). if the business size, payment method and location affect the M&A control premium. The results showed as follows: 1. Before the M&A deals announcement, can find negative abnormal returns on only a few days and after the M&A deals announcement, there’s no significantly abnormal returns in acquiring companies. 2. It’s high-positive correlation between the M&A deals announcement and the return of the stock prices of target companies. 3. In order to gain control of a target company, acquirers typically would like to pay its shareholders a takeover premium over the current market value when negotiate the M&A deals. 4. The related business size has effect on the control premium.

參考文獻


英文部分:
Sharpe, W., 1964, “Capital asset prices: A theory of market equilibrium under conditions of risk,” Journal of Finance, 425-442
Beaver, W. H. 1968. The information content of annual earnings announcements. Journal of Accounting Research, 6(3), 67-92
Fama, E. F., L. Fisher, M.C. Jensen and R. Roll, 1969. The adjustment of stock price to new information. International Economic Review, Vol 10, 1-21
Muller, D. C., 1969. A theory of conglomerate mergers. Quarterly Journal of Economics, 83, 643-65

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