Reporting from Washington — Ally Financial Inc., Citigroup Inc. and SunTrust Banks Inc. failed a key test in a new round of stress tests to see if the nation's 19 largest banks could withstand a severe economic downturn, the Federal Reserve said Tuesday.
The Fed tested the banks to see if they had enough reserves to handle an economic shock in which unemployment would increase to 13%, the Dow Jones industrial average would lose half its value and housing prices would fall an additional 21%.

