This paper investigates the performance attribution of mutual funds and determines which operational capability attracts fund managers. This study observed Taiwanese equity funds between July 2001 and June 2009 and found that the performance attribution analysis of Taiwanese equity funds is characterized by their stock-picking and style investing ability but not their timing ability. Furthermore, a significant negative correlation was found between fund flows and timing ability, and stock-picking and style investing ability have a significant positive correlation with fund flows. These findings indicate that fund flows influence the stock-picking and style investing ability but not the timing ability of fund managers.