上市公司是股票市场的基本要素 ,是股票市场健康发展的基石 ,也是股市投资的对象。投资者根据公司的业绩和成长潜力即公司的质量作出投资决策。如果上市公司普遍经营不善 ,业绩不佳 ,股票不能受到投资者青睐 ,高价位股票将形成“泡沫” ,导致投资者损失惨重 ,股市也因此低迷不 Listed companies are the basic elements of the stock market, the cornerstone of the healthy development of the stock market, but also the object of stock market investment. Investors make investment decisions based on the company’s performance and growth potential, ie the quality of the company. If listed companies generally poor management, poor performance, the stock can not be favored by investors, high-priced stocks will form a “bubble”, resulting in heavy losses to investors, the stock market is also downturn