A Commentary on Research about Complexity of Financial System

Complex science,a new and developing interdisciplinary science nowadays,has grown rapidly.From the perspective of complexity,finance system is an open,complex,dynamic and giant system,appearing non-linear,non-periodic, and sensitive to initial value and self-organized features.Since the middle 80s of 20th century,chaos theory,fractal theory,scaling theory and catastrophe theory,which are traced back to the theory about self-organized and non-linear dynamics and thermodynamics,have been applied widely on the complexity of finance system.Based on the thought of Agent Based Modeling(ABM),the theory has been put forward to CAS theory that models should be created applying computer techniques under the consideration of some rules,exploring the complex interactions among agents-the core of CAS theory.In order to explore the features of distribution about the financial series,many empirical analyses have been done and some unusual financial phenomena have been unfolded.Nevertheless,great deals of question about the complexity of finance system need to be clear up and much study on this field is worthy to be done further.