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A statue stands in front of the AEX index curve as it is displayed on an electronic board inside the Amsterdam Stock Exchange, operated by Euronext NV, a unit of IntercontinentalExchange Group Inc. (ICE), in Amsterdam, Netherlands, on Tuesday, Jan. 14, 2014. ICE plans to sell as much as 30 percent of Euronext NV before the operator of the Paris and Amsterdam exchanges goes public this year, three people with knowledge of the matter said. Photographer: Jasper Juinen/Bloomberg via Getty Images

A statue stands in front of the AEX index curve as it is displayed on an electronic board inside the Amsterdam Stock Exchange, operated by Euronext NV, a unit of IntercontinentalExchange Group Inc. (ICE), in Amsterdam, Netherlands, on Tuesday, Jan. 14, 2014. ICE plans to sell as much as 30 percent of Euronext NV before the operator of the Paris and Amsterdam exchanges goes public this year, three people with knowledge of the matter said. Photographer: Jasper Juinen/Bloomberg via Getty Images

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Donald Trump, president and chief executive of Trump Organization Inc. and 2016 Republican presidential candidate, is seen speaking on a monitor as traders work on the floor of the New York Stock Exchange (NYSE) in New York, U.S., on Friday, March 11, 2016. U.S. stocks rose to join a global rally, poised to erase a weekly decline as investors reassessed stimulus measures in Europe and warmed to the steps taken to boost growth. Photographer: Michael Nagle/Bloomberg via Getty Images

Donald Trump, president and chief executive of Trump Organization Inc. and 2016 Republican presidential candidate, is seen speaking on a monitor as traders work on the floor of the New York Stock Exchange (NYSE) in New York, U.S., on Friday, March 11, 2016. U.S. stocks rose to join a global rally, poised to erase a weekly decline as investors reassessed stimulus measures in Europe and warmed to the steps taken to boost growth. Photographer: Michael Nagle/Bloomberg via Getty Images

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A monitor displays Macy's Inc. signage on the floor of the New York Stock Exchange (NYSE) in New York, U.S., on Tuesday, July 5, 2016. U.S. stocks slipped, tracking declines in European markets amid simmering concerns that Britain's exit from the European Union will further weigh on tepid global growth. Photographer: Michael Nagle/Bloomberg via Getty Images

A monitor displays Macy's Inc. signage on the floor of the New York Stock Exchange (NYSE) in New York, U.S., on Tuesday, July 5, 2016. U.S. stocks slipped, tracking declines in European markets amid simmering concerns that Britain's exit from the European Union will further weigh on tepid global growth. Photographer: Michael Nagle/Bloomberg via Getty Images

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Donald Trump, president and chief executive of Trump Organization Inc. and 2016 Republican presidential candidate, is seen speaking on a monitor as traders work on the floor of the New York Stock Exchange (NYSE) in New York, U.S., on Friday, March 11, 2016. U.S. stocks rose to join a global rally, poised to erase a weekly decline as investors reassessed stimulus measures in Europe and warmed to the steps taken to boost growth. Photographer: Michael Nagle/Bloomberg via Getty Images

Donald Trump, president and chief executive of Trump Organization Inc. and 2016 Republican presidential candidate, is seen speaking on a monitor as traders work on the floor of the New York Stock Exchange (NYSE) in New York, U.S., on Friday, March 11, 2016. U.S. stocks rose to join a global rally, poised to erase a weekly decline as investors reassessed stimulus measures in Europe and warmed to the steps taken to boost growth. Photographer: Michael Nagle/Bloomberg via Getty Images

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NEW YORK - JANUARY 29: In this handout image provided by the New York Stock Exchange, (L-R) Scott Cutler, Co-Head US Listings & Cash Execution, Global Corporate Client Group, NYSE; Thomas Mottola, Founder, Mottola Company; Thalia Sodi, Singer and Terry Lundgren Chairman & CEO, Macy's visit the visit the New York Stock Exchange and ring the Opening Bell January 29, 2015 in New York City. (Photo by Valerie Caviness/NYSE via Getty Images)

NEW YORK - JANUARY 29:  In this handout image provided by the New York Stock Exchange, (L-R) Scott Cutler, Co-Head US Listings & Cash Execution, Global Corporate Client Group, NYSE; Thomas Mottola, Founder, Mottola Company; Thalia Sodi, Singer and Terry Lundgren Chairman & CEO, Macy's visit the visit the New York Stock Exchange and ring the Opening Bell January 29, 2015 in New York City.  (Photo by Valerie Caviness/NYSE via Getty Images)