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  • 學位論文

吉尼係數、資訊傳遞與臺灣股市異常報酬

Gini Coefficient, Information Dissemination and Abnormal Return-evidence from Taiwan Stock Market

指導教授 : 林雅玲

摘要


吉尼係數在經濟學裡通常用來指「所得分配的集中度」,本研究運用吉尼係數(Gini Coefficient)結合台灣券商分點,計算得出籌碼吉尼係數,再以事件研究分析(Event Study)觀察籌碼吉尼係數在極端值時,投資人能否獲得異常報酬。研究期間為2018年10月至2019年5月,日資料共184個交易日,樣本分為高市值、中市值與低市值三組。實證顯示,高市值組具有短期的顯著異常報酬,買方在事件日後五天內有明顯異常報酬,而賣方則是在事件日後11天內有3至4天顯著。

並列摘要


The Gini coefficient is usually used in economics to refer to the "concentration of income distribution". This study uses the Gini Coefficient with the points of Taiwan brokerages to calculate the chip gini coefficient, and then observes the chip gini coefficient by event-study analysis. At extreme values, whether investors can get abnormal returns. The research period is from October 2018 to May 2019. There are 184 trading days in daily data. The samples are divided into three groups: high market value, medium market value and low market value. Empirical evidence shows that the high market value group has short-term significant abnormal returns. The buyer has significant abnormal returns within five days after the event day, while the seller has significant abnormal returns within 11 days after the event day for 3 to 4 days.

參考文獻


一、中文文獻
1.丁誌魰、曾富敏(2005),以向量自我迴歸模式探討臺灣股價、成交量、融資融券與法人進出之關聯性,真理財經學報,13,43-74。
2.李顯儀、吳幸姬(2005),臺灣股票市場中訊息的反應與傳遞效果之研究,輔仁管理評論,12(3),71-94。
3.林昌燿(2017),應用吉尼係數測量股票籌碼集中度:建構台灣證券市場交易策略,國立臺灣科技大學財務金融研究所學位論文。
4.林哲鵬、郭怡萍(2007),競爭策略下新產品宣告對股價的影響:就臺灣資訊電子業公司之檢視,科技管理學刊,12(1),1-28。

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