In this paper, we investigate whether we can create an excess return or not, by holding ‘adequate investment portfolios.’ No one can have excess returns if the financial market is efficient, as every investor has the same information. However, we often observe the market anomaly phenomena in the real market; a typical example of market anomaly phenomenon is that small firms have higher return in terms of stock price growth. Therefore, using 4 valuation ratios(VRs), PBR, PDR, P/E ratio and PEG ratio, and Fama and French’s(2015, hereinafter FF) five factors, we try to investigate whether we can create excess returns or not. We include these five factors because according to FF(2015), a regression estimator using these 5 factors greatly increases its explanatory power of firm value compared with using FF’s(1993) three factors model. In addition, we also include two more additional variables, firms’ default risk and cash dividends, as controlled variables, alongside FF’s(2015) five factors. This is because after carefully studying previous research and stock price theories, we realize the importance of these two additional controlled variables as stock price determinants. Our 4 VRs are mainly related to the value-investing strategy. Namely, investing an undervalued stock would bring higher stock returns(SRs) in the future, as suggested by many famous fund managers, such as Peter Lynch and Philip Fisher. We also use value weighted(vw) portfolios to investigate the consistence of the directions and strengths of coefficients of model in accordance with different portfolios. The vw portfolios are built by using firm size, 4VRs, and FF’s five factors. If these 4 VRs show a consistent association with SRs in accordance with vw portfolios, we can presume that the relationships between VRs and SR are reliable; and it can be an evidence that investors may have an excess return using the characteristics of VRs. We find that VRs influence SR greatly. In other words, firms with low PBR, PDR and P/E ratios generally have high SRs in the coming year. Among the three VRs, we find that PBR presents the clearest evidence of the existence of market anomaly, followed by PDR and P/E ratios. However, we cannot find any particular relationship between the SR and PEG ratios. We use PEG as we believe that PEG ratio would complement P/E ratios’ week point. However, our results from 3 VRs continuously present that firms with low VRs and high profits generally have high SR. This implies that it is too early to deny the usefulness of PEG. In addition, we likewise find that the PEG ratio has a U-sharp relation to SR. Among the controlled variables, market factor, B/M ratio, investment, and firms’ default risk show strong relationships to the future SR. This suggests that there would be a market anomaly phenomenon in the financial market but the five factors suggested by FF(2015) still are important SR determinants. This paper suggests that there are some relationships between VRs and SR. In other words, there is a high possibility that undervalued stock would raise its price higher than other stocks in the coming years. Our results with VRs and vw portfolios continuously show similar results. This implies that investors who are maintaining the ‘adequate investment portfolios’ would receive a higher income in the coming years. Furthermore, we likewise find that the influence of VRs on SR lasts for many years. implies that investors who are maintaining the ‘right portfolios’ would receive a higher income.