US President George W Bush has called for co-ordinated action by leading industrialised countries to tackle the worldwide credit crunch.
A common response must be "well thought-out", Mr Bush said.
The International Monetary Fund has also called for joint action estimating financial losses at $1.4 trillion.
This was double the US rescue package agreed last week, which has failed to stop market turmoil. On Tuesday, the Dow Jones reached a five-year low.
Mr Bush said finance ministers from G7 nations would meet in Washington at the weekend to discuss the crisis.
"Thawing the freeze in the financial system is not going to happen overnight"
He said the financial meltdown had created hardship for many Americans, but pledged : "We have been through tough times before and we're going to come through this again."
Mr Bush said the rescue plan would free up credit for businesses and families but that it would take some time to work.
"Thawing the freeze in the financial system is not going to happen overnight," he warned.
The US president was speaking at an office supply company outside Washington, following talks earlier with European leaders earlier on Tuesday.
Gloomy Bernanke
Meanwhile governments around the world have taken more steps to try to ease the credit crisis:
On Tuesday the Dow Jones Industrial average ended more than 500 points lower at 9447.
Earlier London's FTSE 100 index closed up slightly despite heavy losses by banking shares. France's Cac 40 index also ended higher.
Meanwhile the chairman of the US Federal Reserve, Ben Bernanke, made a gloomy assessment of the financial crisis.
"The outlook for economic growth has worsened," he said, adding that the turmoil might continue into next year.
Correspondents day the remark could hint at a possible rate cut from the current level of 2%.
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