资本的运动是以利润最大化为原则的，行业利润率的高低是引起资本流向变化的最主要因素。随着社会主义市场经济的不断发展和完善，市场这只“看不见的手”所起的作用越来越大。作为经济运行和投资主体的企业和个体投资者，越来越关心自己的投资回报，而资金收益率是反映投资回 The movement of capital is based on the principle of maximizing profits. The level of profitability in the industry is the most important factor that causes changes in capital flow. With the continuous development and improvement of the socialist market economy, the market’s “invisible hand” plays an increasingly important role. Companies and individual investors, who are the main players in economic operations and investment, are increasingly concerned about their return on investment. The return on capital is reflected in the return of investment.