Nyse

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Peter Tuchman (right) works with fellow traders on the floor of the New York Stock Exchange on March 15, 2013. (Associated Press)

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Tader Michael Zicchinolfi (right) works on the floor of the New York Stock Exchange on March 8, 2013. (Associated Press)

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Michael Pistillo, Jr. (right), with Barclays, calls out the price of Tiffany & Co. stock to Joseph Lawlor at the New York Stock Exchange on March 5, 2013. (Associated Press)

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** FILE ** Trader Craig Spector (right) works on the floor of the New York Stock Exchange on Monday, Feb. 25, 2013, in New York. (AP Photo/Richard Drew)