People walk along Wall Street in front of the New York Stock Exchange on May 25, 2010 in New York City. - 

European markets took a dive this morning. And our own Wall Street wasn't looking too good yesterday either. 

James Knightley, senior international economist at ING in London, joins Marketplace Morning Report host David Brancaccio to discuss to reasons behind the plummeting numbers. 

Follow David Brancaccio at @DavidBrancaccio