The Behavior Simulation About Small Investors Of Stock Market Based On Cellular Automata Model

With the development of financial market and complexity research tools,people begin to realize the complexity of stock market investment behavior.The investment of knowledge and technology,psychological feelings and other subjective factors play an important role in the process of stock investment;policy,the investment behavior of the surrounding investors and other objective factors also have a certain impact on investment behavior.Two indexes are established including confidence and conformity according to the characteristics of investment behavior of small and medium investors,thus representing subjective and objective conditions.Matlab is a computer software for mathematical modeling and visualization of scientific computing.The model of existing cellular automata is extended,and Matlab is used to visualize and simulate the behavior of small and medium investors.The experimental results depict the complex volatility of stock prices and trading volume,and analyze the relationship between the confidence degree of small and medium-sized investors and the corresponding stock price time series.The main conclusions of this paper include:(1)Under the same degree of conformity,when the confidence of the traders is stochastic,the fluctuation of stock price and relative trading volume is greater than the consistency of self-confidence.(2)Under the condition of high degree of conformity,the promotion of self-confidence leads to stronger herd behavior,which leads to the fluctuation of stock price.Under the condition of high degree of conformity,the promotion of self-confidence leads to stronger herd behavior,which leads to the fluctuation of stock price.Under the condition of low conformity,the promotion of self-confidence weakens the herd behavior and leads to the fluctuation of stock price.When the consistency is moderate,the change of confidence degree has little influence on stock price,and the stock price varies slightly under different confidence.(3)The test results of the H index of the time series of stock prices have not shown a certain regularity,and the qualitative prediction performance of stock prices is not reliable in short time.Based on the above research results,it can be concluded that the promotion of self-confidence of small and medium investors and the reduction of conformity are beneficial to long-term stable and healthy development of the stock market.