"They're seeing large influxes of cash, " says Paul van Eeden, a mining and metals investor and president of Cranberry Capital, an industry newsletter.
Thanks to low domestic savings rates and profligate government spending, the U.S. economy is reliant on continuous influxes of foreign investment to provide the capital necessary for growth.
That flow - one of the biggest influxes of people in the nation's history - has now reduced to nothing much, while the American jobs market is so weak.
"We do know of a number of boroughs that have a higher than average number of Romanians so I would expect to see influxes in the east of London, which is predominantly where they are now, " he said.