Fed concern at sub-prime insurers by Finance News Bulletin

Published: 10/04/08

Federal Reserve boss Ben Bernanke is keeping an eye on bond insurers, which guarantee the products at the heart of the US sub-prime mortgage crisis.

Mr Bernanke said that the insurers' problems could have an adverse effect on financial markets and the economy.

Bond insurers are reeling after the value of the US mortgage-backed investments they had guaranteed fell.

Analysts fear the insurers will not be able to pay out, forcing banks to announce another big round of losses.

If the issuer of a bond goes bust, they guarantee to step in and make interest rate payments and repay the principal.

MBIA, the largest US bond insurer, said on Wednesday it would raise $750m (£384m) by issuing new shares, after it made a net loss of $2.3bn in the three months ending 31 December.

However, rating agency Fitch said MBIA's main bond insurance unit could lose its top triple-A rating even with new capital, because it faces big potential losses after guaranteeing repackaged sub-prime debt.

If their credit ratings are cut, it could make it harder or more expensive for bond insurers to raise the money to pay banks and other institutions.

"Given the adverse effects that problems of financial guarantors can have on financial markets and the economy, we are closely monitoring developments," Federal Reserve Chairman Ben Bernanke said in a letter.

The 4 February letter was to Paul Kanjorksi, the chairman of the House of Representatives subcommittee that overseas capital markets.

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