Markets mixed at open following Goldman sell-off

Stocks are mixed to open the trading week, following Friday's big sell-off caused by the SEC's fraud charge against Goldman Sachs and ahead of a big week of earnings.

In the first 15 minutes of trading, the Dow is just above water.

The broader S&P 500 is down one-tenth of 1 percent and the tech-heavy Nasdaq is down less than one-tenth of 1 percent.

After dropping as much as 15 percent in Friday trading, shares of Goldman are down 2.9 percent today.

Citigroup -- one of the hardest-hit banks during the financial crisis -- reported a $4.4 billion first-quarter profit this morning, the mega-bank's biggest profit in almost three years.

In Iceland volcanic ash news, the head of the European Union's transport commission said today the economic impact on the airline industry because of the ongoing ash disruption could be greater than that caused by the Sept. 11, 2001, terrorist attacks.

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