Stricter lending requirements have led to a marked improvement in the bank's credit quality.
The new year may be tougher for the chip maker after a solid 2011.
A spike in oil prices due to Iran's threats could divert traffic from trucks, but higher fuel costs would pressure railroad margins.
The stock plunges despite the company's high subscriber growth, indicating the market believes the future is highly uncertain.
With stricter environmental regulations in the U.S. and signs of a slowdown in China, coal's importance to freight carriers will likely decline.
The company's generics business is poised to grow after it recorded revenue of nearly $10 billion in 2010.
Major oil producers saw output reduced because of the natural decline in production fields, asset sales and political issues.
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