这是维基的介绍:
Fitch Ratings Inc. is an American credit rating agency and is one of the "Big Three credit rating agencies",[3] the other two being Moody's and Standard & Poor's. It is one of the three nationally recognized statistical rating organizations(NRSRO) designated by the U.S. Securities and Exchange Commission in 1975.
一家总部设在美国的著名评级公司,又是关于美国国债的评价,一定是反复审核的。当然如果大家不相信评级公司,那这些公司就没有存在的必要了。