Two of America's most noted financial commentators have argued that the recovery of the US economy is not a given, despite the recent uptick in sentiment.
Warren Buffett, the billionaire investor, and Alan Greenspan, the former Federal Reserve chairman, have both issued cautions to those who say the US economy is in the final stages of recession.
"We are not out of problems yet," said Mr Buffett. "We have got to get the sputtering economy back so it is functioning as it should be," added the septuagenarian "Sage of Omaha" in an interview with the New York Times.
Meanwhile Mr Greenspan, speaking via video link to a conference in Bombay, India, said banks must raise capital levels to weather future shocks.
"I think even in non-euphoria, non-crisis times, we need to have a larger buffer than we currently have," he said, echoing the words of US Treasury Secretary Tim Geithner ahead of last week's meeting of the G20 finance ministers.
Mr Greenspan, who stepped down from the Fed in 2006, also warned that capital injected into the banking system could fuel inflation.
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