This study examines whether the continuous time random walk (CTRW) model is useful to explain and predict the fluctuation of the financial market. For this purpose, we formalize the CTRW model for a financial market, and estimate some important expone...
This study examines whether the continuous time random walk (CTRW) model is useful to explain and predict the fluctuation of the financial market. For this purpose, we formalize the CTRW model for a financial market, and estimate some important exponents of the model using the tick-by-tick data of financial market. From some empirical results, we conclude that the CTRW model can be applied well to describing an abnormal time evolution of high frequency financial data. It also provides the framework of predictions for the market dynamics. Namely, based on the CTRW model, one can analyze theoretically the dynamic behavior of the probability density function of returns and the asymptotic volatility. One can also forecast numerically the long-time volatility using the tick-by-tick market data. Overall, the CTRW model can be considered as a useful and complementary tool which can deal with some complex issues of financial markets.