The recent failures of credit rating agencies are now well known. They too often gave high ratings to bonds that subsequently defaulted. Their investment grade ratings of many subprime mortgage-backed securities were a primary cause of the current financial crisis.
信用评级机构近来的失败如今已众所周知。在太多情况下，对于那些最终违约的债券，它们给予了较高的评级。它们给予许多次级抵押贷款支持证券的“投资级”评级，是当前这场金融危机的主要诱因。
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