The U.S. federal debt ceiling and a plan for dealing with the U.S. federal deficit were cited by the largest number of respondents.

FORBES: What Economic Catalysts Are Investors Seeking?

You know the examples: the debt ceiling debate, the job plan, food safety regulations, etc.

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Obama, who rejects any negotiations over the debt ceiling, has welcomed the House plan as a step forward because it prevents immediate brinksmanship over whether the government will meet its financial obligations.

CNN: January 23, 2013 -- Updated 1714 GMT (0114 HKT)