Because it is about empirical tests of risk , this chapter used interrelation coefficient , index of risk decentralization and risk resolution index . the research found that the correlation of price fluctuation in shanghai a - share market reduced and the proportion of systematic risk in total risk changed 研究發(fā)現,上證a股市場股價變動的關聯度較之早期已有明顯降低,而系統(tǒng)風險所占總風險的比重也呈下降趨勢,分散化投資能夠較大幅度的化解投資風險。