A notice in a store window in New York City announces a retail job opening. Now that unemployment has slipped below 6 percent, there's renewed interest in what the Federal Reserve's target for joblessness should be. Spencer Platt/Getty Images hide caption

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A trader works on the floor of the New York Stock Exchange on Wednesday. Stocks took a beating, with key indexes falling more than 2 percent before bouncing back slightly. Spencer Platt/Getty Images hide caption

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