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Pedestrians walk along Wall Street while looking at their smartphone devices in front of the New York Stock Exchange (NYSE) in New York, U.S., on Monday, March 20, 2017. U.S. stocks fluctuated about 1 percent below all-time highs, while oil fell toward $48 a barrel. Photographer: Michael Nagle/Bloomberg via Getty Images

Pedestrians walk along Wall Street while looking at their smartphone devices in front of the New York Stock Exchange (NYSE) in New York, U.S., on Monday, March 20, 2017. U.S. stocks fluctuated about 1 percent below all-time highs, while oil fell toward $48 a barrel. Photographer: Michael Nagle/Bloomberg via Getty Images