国债,一直被认为是低风险金融产品。但欧债危机的爆发与持续蔓延,让主权债务问题成为全球经济复苏的最大风险点,美国债务上限调整出现的多起争议及引发的违约忧虑,进一步促使投资者开始重新审视国债市场的风险。特别是在全球金融危机爆发五年之后,世界经济金融复苏的形势错综复杂,主要经济体复苏阶段及政策调整 Treasury bonds have long been considered as low risk financial products. However, the outbreak and continued spread of the European debt crisis made the issue of sovereign debt the biggest risk point in global economic recovery. The controversy and the default concerns caused by the adjustment of the U.S. debt ceiling further prompted investors to start re-examining the risks in the national debt market. Particularly after five years of the global financial crisis, the world economic and financial recovery has been characterized by complicated situations and major economic recovery stages and policy adjustments