Complexity Analysis Of Stock Network In Shanghai A - Share Stock Market Based On Complex Network

Securities market is the result of market economy develops to a certain stage, securities market is a typical complex economic system.There are many factors affecting the stock market, such aspolitics, economy, industry,psychology and natural factor,through the fluctuationson of stock price,we know the influence of various factors bring to stock market.It is good for understanding the change of the securities market and the correlation mechanism between stocks,by building stock price relation network.People want to get higher yields with low risk when they invest in stocks, but there are benefits and risks coexistonthetock market. The stock price fluctuation is influenced by many factors,so it is difficult to predictthefluctuationson of stockprice accurately.In order to spread risk reduce losses,when people choose the shares avoid to selectstock portfolio with strong correlation as far as possible.The main purpose ofanalyzingthe correlationof stock price fluctuation based on complex network theory is to help people reduce the investment risk and help people to choose the right stock portfolio.First of all,take the stocks as nodes, the stock price correlation assides based on the complex network model of stock,and bulid the stock price relation network.The same period price-related and hysteresis price-relatedstock network of Shanghai A shares were constructed,based on undirected and directed networks.Found that the stock price relation network is a small-word network,and analyzed the interactional relationship between the fluctuations of the stock price.Secondly,Strongcorrelational stock collections were found in the stock market,by analyzing the community structure of the stock price relation network.The results can help people choose reasonable stock portfolio to investment and reduce the investmentrisk.And lastly,taken the two sessions as example,analyzed the influence of the major meeting on securities market.By contrastingthe change of stock network’s propertiesbefore and after the two sessions,analysised the influence of the two sessions on the stock market.Moreover,this paper have analysised the influence of the two sessions on the different stock industry sector.