This paper examines the absence of the book-to-market equity (BM) effect in the Taiwan stock market, applying the BM decomposition proposed by Daniel and Titman (2006). First, we do not observe a significantly negative correlation between future stock return and intangible return on research-and-development-intensive firms in Taiwan, which is inconsistent with the US evidence documented by Daniel and Titman. Second, undervaluation of research-and-development-intensive firms possibly leads to the absence of the BM effect. Those firms, most of which have low BM, perform well not only in the past, but also in the future, thereby obscuring the BM effect.j ere_485 289..299 JEL Classification Numbers: G12, G14.