This study investigates the impact of market, interest rate, and exchange rate volatility on stock return of financial holding companies in Taiwan. Two estimation models-OLS and GARCH are adopted. Samples cover 14 security, insurance, and banking subsidiaries that belong to main financial holding companies in Taiwan. The variables used in this study ate the daily data from 2007to 2015, including TAIEX, 90-day commercial paper interest rate, NTU-USD exchange rate and Taiwan financial holding companies portfolio return. The results find that market return has a positive and significant impact on financial holding companies portfolio return while the interest rate does not appear to be a significant factor and that the exchange rate presents to be a negative and significant factor.