Abstract: Based on the panel data of 94 commercial banks in China during 2011-2015, this paper makes use of the Internet Finance Index constructed with the method of text mining to analyze the impact of the development degree of Internet finance on the general non-interest income, fees and commission income, and trading income of various commercial banks. The results of the empirical analysis show that in the samples as a whole, the development of Internet finance has significantly reduced the general level of non-interest income of commercial banks; the main reason is that the competition effect brought forward by the development of Internet finance has exceeded the technology spillover effect. As for the classified samples, the non-interest income and its constituents of state-owned commercial banks, joint-stock commercial banks and local commercial banks are under different impacts from the development of the Internet finance. These differences are mainly due to the differences in the technical level, customer maintenance and risk tolerance of commercial banks.

Key words: Internet finance; text mining; non-interest income; fees and commission income; trading income