本文研究台灣金融股市場是否存在相互牽連及預測之特性,選取台灣具代表性 之金融股國泰金、中信金及富邦金之日資料,探討三檔金融股股價指數報酬間的相 互影響性。資料期間從 2016 年1 月 1 日至 2022 年 3 月 31 日,其中以向量自我迴歸 模型及向量誤差修正模型,分析三檔金融股間股價報酬之相互關連性,並以因果檢 定來分析三檔金融股間股價報酬之領先與落後的因果關係。而其實證結果顯示:三 檔具代表性之金融股股價報酬因果關係為國泰金股市報酬跟中信金股價報酬會互相 影響,為雙向因果關係;國泰金與中信金股價報酬會影響富邦金股價報酬,為單向 因果關係;反之,富邦金無法影響國泰金與中信金股價報酬。
This paper examines the relationship among three financial stocks in Taiwan's stock market, there are Cathy Holding, Ctbt Holding and Fubon Holding Companies. We select daily data for the Taiwan Weighted Stock Price Index. The data period is from January 1, 2016 to March 31, 2022. We adopt vector auto-regression model and vector error correction model to analyze Granger causality among these three financial stocks return. The empirical results show that the Granger causal relationship between the Cathy Holding and Ctbt Holding stock, they affect each other, which is a two-way Granger causal relationship; Cathy and Ctbt Holding stock return has a one-way Granger causal relationship to Fubon Holding stock return. However, Fubon does not affect Cathy and Ctbt.