過去文獻提出許多影響機構投資人行為之要素,而本研究專注於探討資訊不 確定性因子是否會對整體及不同類型之機構投資人持股、以及整體機構投資人過 度持股行為產生影響。本研究蒐集了1983 年至2016 年美國公司年資料,使用panel 資料迴歸分析。實證結果發現,在加入控制變數後,資訊不確定性與整體機構投 資人持股、過度持股成負向關係。而其中資訊不確定性又對非TRA 型機構投資人 持股負向影響較大,對TRA 型機構投資人持股負向影響較小。且資訊不確定性之 影響效果具有遞延性。
This study investigates the effects of information uncertainty on institutional share-holding and overweight behavior, including share-holding behavior of different types of institutional investor (TRA, Non-TRA). The empirical results show that the information uncertainty has a significant negative effect on institutional share-holding and overweight behavior. This negative relationship is robust after adding controlling variables. The negative effect of information uncertainty is more significant on the non-TRA institutional investors than on TRA ones. In addition, the effect of information uncertainty also defers in one period.