Standard & Poor's expects lawsuit over subprime ratings
5 February 2013 Last updated at 06:14 GMT
Standard & Poor's says it is to be sued by the US government over the credit ratings agency's assessment of mortgage bonds before the financial crisis.
The civil lawsuit would focus on S&P's high ratings in 2007 for some mortgage-backed securities that later collapsed in value, said the agency.
S&P says the case is entirely without factual or legal merit.
The BBC's Beth McLeod reports.