The model and chaos of undulate trader colony in the stock market

From the angle of the microcosmic structure of the securities market, using alterable dynamic model of the trader colony, separately under ascertained and incertitude finance circumstance, we have studied the forming process of the market under dispersed trading state and we have analyzed chaos conditions of trader colony alteration. Result indicates that lowest standard of market liquidity is that trader colony of buyer and seller both must have an appropriate proportion. The time achieving stable liquidity of the market has relation to the parameter describing traderspsila leaving the stock market. Through influence of trading system on parameter of trader colony, the control of market process can be realized. Finally simulation calculation is given.