It could provoke the gravest risk, that all three rating agencies declare a credit event and then there are big contagion risks for other countries.

这可能引发严重的风险，三家信用评级机构都宣称可能爆发信贷危机，那这个风险就会传染到其他国家。

youdao

The three big credit-rating agencies have overhauled their methods of assessing default risk in the American subprime-mortgage market in the past month.

就在上个月，美国三大信用评分机构针对国内次级按揭市场固有风险的评估理念进行了彻底的检测。

youdao

The same fate has befallen the big three credit rating agencies, whose deeply flawed ratings were exposed when the us housing bubble burst.

同样的命运也降临在三大信用评级机构身上，美国住房泡沫的破灭暴露出他们的评级有着重大缺陷。

youdao

February's downgrade by Moody's, another of the big three rating agencies, was seen as a political embarrassment to the government, which had promised to protect the UK's credit rating when it was elected in 2010.

BBC: S&P reaffirms UK triple-A rating

The government has arranged it so there are just three sources that really matter for bond ratings the big-three credit rating agencies are effectively a government-approved oligopoly.

FORBES: At Odds Over S&P