Foreign Minister Murray McCully (L) of New Zealand is welcomed by Hungary's Minister of External Economy and Foreign Affairs Peter Szijjarto (R) in Tapolca on August 18 , 2016 prior to their meeting. / AFP PHOTO / ATTILA KISBENEDEKATTILA KISBENEDEK/AFP/Getty Images

New York Fed President William Dudley takes part in a panel convened to speak about the health of the U.S. economy in New York, U.S. on November 18, 2015. REUTERS/Lucas Jackson/File Photo - RTX2L9HD

Storm clouds are seen above the Canary Wharf financial district in London, Britain, August 3, 2010. REUTERS/Greg Bos/File Photo - RTSM0MJ

A woman carrying a shopping bag stands in front of the luxury store Harrods in west London on August 17, 2016. Retail sales in Britain, a key driver of the country's economy, rebounded 1.4 percent in July from the previous month's drop, official data showed on August 18, calming fears over any immediate fallout from Brexit. Sales by volume rose sharply following a 0.9-percent drop in June that had been caused by wet summer weather, according to the Office for National Statistics. / AFP PHOTO / DANIEL LEAL-OLIVASDANIEL LEAL-OLIVAS/AFP/Getty Images

Pedestrians walk past shops in Knightsbridge in central London on August 17, 2016. Retail sales in Britain, a key driver of the country's economy, rebounded 1.4 percent in July from the previous month's drop, official data showed on August 18, calming fears over any immediate fallout from Brexit. Sales by volume rose sharply following a 0.9-percent drop in June that had been caused by wet summer weather, according to the Office for National Statistics. / AFP PHOTO / DANIEL LEAL-OLIVASDANIEL LEAL-OLIVAS/AFP/Getty Images

Pedestrians walk along the pavement in the busy shopping district on Oxford Street central London on August 17, 2016. Retail sales in Britain, a key driver of the country's economy, rebounded 1.4 percent in July from the previous month's drop, official data showed on August 18, calming fears over any immediate fallout from Brexit. Sales by volume rose sharply following a 0.9-percent drop in June that had been caused by wet summer weather, according to the Office for National Statistics. / AFP PHOTO / DANIEL LEAL-OLIVASDANIEL LEAL-OLIVAS/AFP/Getty Images

A pedestrian walks carrying a shopping bag in Oxford Street in central London on August 17, 2016. Retail sales in Britain, a key driver of the country's economy, rebounded 1.4 percent in July from the previous month's drop, official data showed on August 18, calming fears over any immediate fallout from Brexit. Sales by volume rose sharply following a 0.9-percent drop in June that had been caused by wet summer weather, according to the Office for National Statistics. / AFP PHOTO / DANIEL LEAL-OLIVASDANIEL LEAL-OLIVAS/AFP/Getty Images

A pedestrian walks carrying a shopping bag in Oxford Street in central London on August 17, 2016. Retail sales in Britain, a key driver of the country's economy, rebounded 1.4 percent in July from the previous month's drop, official data showed on August 18, calming fears over any immediate fallout from Brexit. Sales by volume rose sharply following a 0.9-percent drop in June that had been caused by wet summer weather, according to the Office for National Statistics. / AFP PHOTO / DANIEL LEAL-OLIVASDANIEL LEAL-OLIVAS/AFP/Getty Images