A trader works as Pacific Investment Management Co. (PIMCO) signage is displayed on the floor of the New York Stock Exchange (NYSE) in New York, U.S., on Wednesday, Dec. 21, 2016. U.S. stocks fluctuated with the Dow Jones industrial Average failing to make progress toward 20,000 as oil erased gains and a rally in the dollar faltered in light trading ahead of the holidays. Photographer: Michael Nagle/Bloomberg via Getty Images
