本研究利用2007年1月至2016年12月共10年期間,包含7個多空時期資料,研究對象為台灣50與台灣中型100成分股公司,先分類電子、非電子與非金融族群,再區分高(低)本益比與高(低)股價淨值比公司,依據多空時期進行投資組合,以檢視是否存在本益比效應與股價淨值比效應。 研究結果顯示:(一)以台灣中型100成分股而言,多頭時期存在本益比與股價淨值比效應,空頭時期本益比與股價淨值比效應皆不存在。(二) 以台灣50與中型100成分股而言,多空時期皆存在本益比效應,多頭時期存在股價淨值比效應,空頭時期並不存在此效應。(三)以台灣50與中型100電子成分股而言,多空時期皆存在本益比效應,但多頭時期存在股價淨值比效應,空頭時期並不存在此效應。(四)以台灣50與中型100非電子成分股而言,本研究顯示多空時期皆存在本益比效應,但多頭時期存在股價淨值比效應,空頭時期並不存在此效應。(五)以台灣50與中型100非金融成分股而言,本研究顯示多頭時期存在本益比與股價淨值比效應,空頭時期本益比與股價淨值比效應皆不存在。 從以上實證結果可知,台灣50與中型100成分股在多頭時期具有本益比與股價淨值比效應,在空頭時期並不呈現股價淨值比效應。建議投資者應著力於基本面與產業趨勢分析,在多頭時期可選擇低本益比與低股價淨值比之價值股進行投資,空頭時期亦可選擇低本益比股票投資,此乃投資獲利之王道。
The research period is from January 2007 through December 2016. The research subjects are the constituents of the Taiwan 50 Index and the Taiwan Mid-Cap 100 Index. The sampled companies are divided into sub-groups: high/low price-earnings ratio and high/low price-book ratios before they are constructed into portfolios. The purpose is to examine the presence of P/E ratio and P/B ratio effects. The research findings are as follows: 1.There are both P/E ratio and P/B ratio effects on the constituents of the Taiwan Mid-Cap 100 Index in bull markets but not in bear markets. 2.For the constituents of the Taiwan 50 Index and the Taiwan Mid-Cap 100 Index, the P/E ratio effects exist in both bull and bear markets. The P/B ratio effects are only observed in bull markets but not in bear markets. 3.For the constituents of the Taiwan 50 Index and the Taiwan Mid-Cap 100 Index in the electronics industry, the P/E ratio effects exist in both bull and bear markets. The P/B ratio effects are only observed in bull markets but not in bear markets. 4.For the constituents of the Taiwan 50 Index and the Taiwan Mid-Cap 100 Index not in the electronics industry, the P/E ratio effects exist in both bull and bear markets. The P/B ratio effects are only observed in bull markets but not in bear markets. 5.For the constituents of the Taiwan 50 Index and the Taiwan Mid-Cap 100 Index not in the financial industry, both the P/E ratio and the P/B ratio effects exist in bull markets, but neither in bear markets.