自去年年底开始,PIIGS(葡萄牙、意大利、爱尔兰、希腊、西班牙)五国便一直处于风口浪尖。2009年12月,全球三大评级公司(标准普尔公司、穆迪投资服务公司和惠誉国际信用评级有限公司)宣布下调希腊主权评级,希腊的债务危机随即一发不可收拾,并引发了人们对葡萄牙、西班牙、爱尔兰和意大利等本身存在一定风险的国家主权债务的质疑,使得本来发生在个别国家的 Since the end of last year, PIIGS (Portugal, Italy, Ireland, Greece and Spain) have been at the forefront of the five countries. December 2009, the world’s three major rating companies (Standard & Poor’s, Moody’s Investors Service and Fitch Ratings Limited) announced a downgrade of Greece’s sovereign rating, Greece’s debt crisis immediately out of control, and triggered people’s The sovereign debts of countries with some inherent risks, such as Portugal, Spain, Ireland and Italy, have made it impossible for the countries