從眾行為在實際生活中是一個十分普遍可見的現象,在傳統財務學中卻以其非理性而始終未予應有的注意,認定套利力量可使一切不理性灰飛煙滅,因而類似從眾之類的行為「只是少數投資人的個別傾向,不致以系統化的方式呈現在整體市場中」,此一信念造成了一個理論與實務間的缺口。本研究即針對此一缺口,就台灣整體股市進行探討,分別透過分組GARCH FAMILY (GARCH、TGARCH、EGARCH)迴歸分析加以檢視。根據實證結果清楚地發現,不論就週轉率或委買量進行觀察,幾乎全部呈現單調線性關係,在在指出明顯的從眾傾向:前期週轉率(委買量)越的者(即眾之所在),本期的交易(委買)活動越熱絡。而在各種GARCH分析模型中,從眾傾向也多獲得顯著的支持。 簡而言之,本研究經由行為財務學的觀點並利用嚴謹的實證方法,以實證結果具體指出,即使在整體市場中,仍可觀測到顯著的系統化從眾傾向。
Herding is a very popular observation in the daily life. However, it is excluded and ignored by the traditional Finance research, due to its irrationality, and thus forming a gap between theory model and the practical world. This study aims at tapping this issue by analyzing the Taiwanese stock market as a whole. By means of graph observation through ranking and grouping, it demonstrates clear pattern supporting the systematic herding behavior. The GARCH family regression models are also reveal the herding behavior significantly.