The big banks are showing they can still make money, even as Main Street struggles - though not from lending, refinancing homes or other bread-and-butter business.
Instead, they're doing what Wall Street does best - betting big on stocks, bonds, commodities and other assets.
Citigroup, the shakiest of the major banks during the financial crisis, reported Thursday it eked out a quarterly profit from trading, despite suffering more losses on consumer loans. Trading also drove big profits at Goldman Sachs and JPMorgan Chase.
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