资本市场是科技创新的重要保证,科技创新是资本市场健康发展的有力支撑。美国是世界上最为发达的资本市场,市值占到全球资本市场总市值的50%。美国资本市场体系的庞大功能,使得不同规模不同需求的企业都可以有效的利用资本市场进行股权融资, Capital market is an important guarantee for scientific and technological innovation. Scientific and technological innovation is a strong support for the healthy development of capital market. The United States is the most developed capital market in the world and its market capitalization accounts for 50% of the total market cap of global capital markets. The huge function of the capital market system in the United States enables enterprises of different sizes and needs to effectively utilize the capital market for equity financing,