Abstract: As the most important signal for buyers and sellers,price is the soul of the market.As the stock price is affected by joint complex systematic factors and non-systematic factors,it is thoughtless to simply apply linear regression model.Objectively,the linear frame shall be broken through and it shall be viewed as a non-linear system.In the regard of influencing factors on the stock price,elements beyond company level,such as market mechanism,market environment,investor psychology and investor preference,all influence the formation of circulation price.Moreover,their functions are complex,random,time-dependent,and interactive.

Key words: stock pricing, variables, Cobb-douglas, nonlinear