Banks exposure to the European debt emergency, which may perhaps heave to facilitate region into a decline and rattle worldwide economic markets.associate Chairman Janet Yellen keep up week understood the Fed would purse the stress tests appearing in introduction weeks.The Fed performed the earliest stress tests at home the spring of 2009. The countrys 19 leading banks participated. The opening stress test reassured investors so as to Americas biggest banks had the assets to pick up through the slump and the 2008 pecuniary catastrophe.in lieu of the hottest test, the deal with has been stretched out to 31 banks.