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  • 學位論文

投資人關注對股價報酬率影響之探討—以中國大陸ST企業為例

The Impact of Investor Attention on Stock Return —Evidence from ST firms in Mainland China

指導教授 : 李樑堅 李建興

摘要


本研究旨在探討基於百度指數的投資人關注對較高或較低不同百度搜尋量指数的ST公司股票價格報酬的影響,探討這個效果是否會因為市場狀態以及公司所有權性質的改變而變化,並且加入政治關聯這一虛擬變數對樣本進行分類探討。 本研究具有兩個獨特特征:(1)我們關注在中國大陸上市被ST處理之公司;(2)結合投資人關注與政治關聯兩種因素,因此本研究能準確反映不同投資人關注及政治關聯對股票報酬之影響。 本研究發現百度ASVI指數增加,對於高百度或低百度搜尋量的ST公司股票價格報酬皆具有高度正相關,代表無論較高或較低百度搜尋量指數的ST公司的短期股價報酬很容易受到投資人關注的影響,然後進行投資動作從而推高股價。另外,百度搜尋量相對高的ST公司,其百度ASVI指數的投資人關注影響力,較強於百度搜尋量相對低的ST企業。無論是國營還是私營ST企業,政治關聯對於ST企業的短期股價報酬有負向影響。進一步考慮市場狀態,實證結果發現百度指數對提高股價的效果,下降市場沒有顯著強於上升市場。政治關聯在下降市場狀態下對短期股價有顯著的負向影響。

並列摘要


This study investigates investor attention based on Baidu Index effects on stock returns by examining Chinese ST firms with higher or lower Baidu search volume, whether the effects will be different due to changes in the market states and the nature of firm ownership, and join the dummy variable of political connections to classify the sample. Our study has two unique features. 1) The study focuses on Special Treatment firms listed in Chinese stock exchanges, and 2) we combine the two factors: investor attention and political connections. Therefore, our study may accurately measure differential and asymmetric investor attention and political connections effects on stock returns. The results suggest that investor attention affects stock returns positively both in higher and lower Baidu search volume ST firms, and the firms with higher Baidu search volume has a stronger effect than lower firms. On the other hand, political connection has a significant negative effect on the ST firms’ short-term stock returns whether the firm is governmental or private. Further consider the market states, the empirical results show that the effect that the increase in Baidu index to raise the stock returns of down market are not stronger than the up market. In the down market, the political connections of ST firms has a significant negative effect on stock return.

參考文獻


7. 李顯儀、吳幸姬與李亮君 (2008),「投資人對股票報酬與風險的關心程度之探討」,《台灣管理學刊》,第8卷第2期,69-71。
15. 黃玉麗、沈中華、林昆立(2011),政治關聯(係)與債務資金成本,管理學報,2011,28卷,1期,頁31-47。
11. 姚珊珊(2014),政治關聯與財務困境恢復——基於ST上市公司「摘帽」的實證研究,兩岸金融季刊,2014年6月,第二卷第二期,頁29-44。
1. Barber, B. M. and T. Odean (2008), “All That Glitters: The Effect of Attention and News on the Buying Behavior of Individual and Institutional Investors,” Review of Financial Studies, Vol. 21, 785-818.
3. Boubakri,N.,Cosset,J.and Saffar,W. (2008),Political connections of newly privatized firms, Journal of Corporate Finance,14:654-673

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