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相关性是度量变量相关关系的指标,当两变量的相关系数较大时,表明它们之间的相关性较强。在股票市场中,如果两支股票的相关性大,则表明这两支股票波动方向的一致性较强。如果多支股票相互之间的相关性都很强,当一支股票出现大幅度的涨或者跌时,这种现象会“传染”给其他股票,其他股票也发生大幅度涨跌,严重时将危害股票市场的稳定。与此同时,市场的整体运行环境会制约个股行情发展,这是所谓的多数原理。当发现大多数股票与大势同步,不管是处于下跌市,还是上扬市之中,我们就可判断市场的整体运行环境。本文用一元线性回归模型对沪深股市大盘及两支龙头股之间的相关性作出试探性的解释分析,发现两支龙头股:招行和万科A之间,以及两支股票与大盘走势之间的确存在一定的相关性,但是在做投资决策的时候仍需考虑非系统性因素。
Correlation is a measure of the correlation of variables, and when the correlation coefficient of the two variables is large, it shows that they are highly correlated. In the stock market, if the correlation between the two stocks is large, it indicates that the two stocks are highly consistent in the direction of fluctuations. If the multiple stocks are highly correlated with each other, when a stock rises sharply or falls, this phenomenon will “infect” other stocks. Other stocks also undergo significant ups and downs, serious Will endanger the stability of the stock market. At the same time, the overall market operating environment will restrict the development of individual stocks, which is the so-called majority principle. When we find that most of the stocks are in sync with the general trend, whether in a falling market or a rising market, we can judge the overall market operating environment. In this paper, a linear regression model of Shanghai and Shenzhen stock market and two leading shares of the correlation between the tentative interpretation and analysis found two leading stocks: China Merchants Bank and Vanke A, and between the two stocks and the market trend There is indeed a certain degree of relevance, but non-systemic factors need to be considered when making investment decisions.