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Traders work on the floor of the New York Stock Exchange (NYSE) in New York, U.S., on Tuesday, Dec. 27, 2016. U.S. stocks climbed in thin post-holiday trading as energy shares gained with crude oil. Photographer: Michael Nagle/Bloomberg via Getty Images

Traders work on the floor of the New York Stock Exchange (NYSE) in New York, U.S., on Tuesday, Dec. 27, 2016. U.S. stocks climbed in thin post-holiday trading as energy shares gained with crude oil. Photographer: Michael Nagle/Bloomberg via Getty Images