A key metric of wealth inequality in the United States has reached levels unknown since the Great Depression, a new study into global finances has found.
It was also revealed that almost half of the assets in the world are owned by just 0.7 per cent of the world's population, as the world's economy powers ahead.
The new data has raised the specter of a new catastrophic economic failure, of a parallel with the banking crashes of 2008 or the dot-com bubble in 2000.
As a sign of wealth concentration, the number of dollar millionaires globally has shot up 164 per cent since 2000 to 34.8million individuals today - with 41 per cent of them living in the United States.
Authors of the report, by investment bank Credit Suisse, described the results as 'a worrying signal' which could lead to a new recession.
The report, by three international economic experts, presented data comparing levels of wealth in the country with its disposable income.
High levels of wealth - associated with millionaires, company owners and major shareholders - tend to be a sign the rich are doing well. High levels of income, meanwhile, are associated with wage earners and more even gains.