NEW YORK - DECEMBER 20:  Flags hanging from the New York Stock Exchange (NYSE) building are the backdrop for a Wall St. street sign December 20, 2006 in New York City. The NYSE Group Inc. approved the $14.6 billion purchase of Euronext NV, making the way for the creation of a global securities market. Euronext N.V. , a holding company incorporated under Dutch law that operates through local subsidiaries, was formed on September 22, 2000 when the exchanges of Amsterdam, Brussels and Paris merged. Getty Images logo Getty Images 66 months ago

NEW YORK - DECEMBER 20: Flags hanging from the New York Stock Exchange (NYSE) building are the backdrop for a Wall St. street sign December 20, 2006 in New York City. The NYSE Group Inc. approved the $14.6 billion purchase of Euronext NV, making the way for the creation of a global securities market. Euronext N.V. , a holding company incorporated under Dutch law that operates through local subsidiaries, was formed on September 22, 2000 when the exchanges of Amsterdam, Brussels and Paris merged.