股市有风险这是股票投资者均已了解的事实，在众多可供选择投资的股票当中，它们的风险大小不尽相同。β系数理论就是指导投资者合理地回避股票投资风险进行科学决策的一个有效理论。实践应用表明个系数能够很好地反映出一段时期内个股与股票市场之间变化的联动关系。通过β系 Stock Market Risks This is a fact that equity investors are already aware of, and their risk varies from stock to stock of alternative investments. The beta coefficient theory is an effective theory to guide investors to reasonably avoid the risk of stock investment and make scientific decisions. Practice shows that the coefficients can well reflect the changing relationship between stocks and the stock market over a period of time. Through the β system