With the rapid connection of the World Wide Web and the immediate transfer of international information, the globalization of the securities market has clearly existed in the international investment environment, and there has also been growing concern about the relationship between exchange rate and stock prices. Different from the selection of variables in past empirical studies, this paper uses the exchange rate of three currencies to Hong Kong Dollar and the market value of five commercial banks as variables. The purpose of this paper is to explore the impact of the Hong Kong dollar exchange rate fluctuation on the stock price of the banking industry in the Hong Kong stock market where the linked exchange rate system is implemented. The situation, and whether the effect of Hong Kong dollar exchange rate fluctuations on Hong Kong banking stock prices is different from previous domestic and foreign scholars' conclusions. The sample bank selected Hong Kong’s three largest note-issuing banks: HSBC, Standard Chartered Bank and BOC Hong Kong; and two more representative banks were Bank of East Asia and Hang Seng Bank.
In the empirical study of the correlation between the Hong Kong dollar exchange rate and Hong Kong banking stock price, this study used statistical methods such as the unit root test, the E-G two-step cointegration test, the Granger causality test, and the VAR model. The empirical results show that the fluctuation of the exchange rate of the Hong Kong dollar during the sample period is related to the change in the stock price of the Hong Kong banking industry. The exchange rate of the Renminbi against the Hong Kong dollar has a weak negative correlation with the market value of the Hong Kong banking industry on the one hand, and the exchange rate between the British pound and the Japanese yen on the other hand. The market value of Hong Kong banking stocks has a significant negative correlation.