2008年9月14日,资产总额超过6000亿美元的美国第四大投资银行雷曼兄弟公司宣布破产。此后美国金融市场乃至全球金融市场都出现急剧、大幅度的下跌。可以说,目前正在进行的这场金融危机是20世纪30年代以来人类社会最严重的一场金融危机,所以人们称之为全球金融海啸。 On September 14, 2008, Lehman Brothers, the fourth-largest investment bank in the United States with a total assets of more than 600 billion U.S. dollars, declared bankruptcy. Since then, the U.S. financial markets and even the global financial markets have seen sharp and drastic falls. It can be said that the ongoing financial crisis is the most serious financial crisis in human society since the 1930s, so people call it the global financial tsunami.