This paper investigates the impact of CSRC allowing domestic residents to invest in the B-share stock market. An ARJI model is used to analyse the jump dynamics process during the pre- and post-event periods and impulse response functions are employed to demonstrate the volatility transmissions between the A- and B-share markets. Results indicate that the jump intensity and the jump frequency of Shanghai and Shenzhen stock markets increases. Moreover, the volatility transmissions between A- and B-share markets accelerates. It is therefore concluded that the CSRC, by permitting domestic residents to invest in B shares, will impact the A- and B-share stock markets.
