A Chinese national flag flutters at the headquarters of a commercial bank on a financial street near the headquarters of the People's Bank of China, China's central bank, in central Beijing November 24, 2014. REUTERS/Kim Kyung-Hoon/File Photo

A hot air balloon rises into the early morning sky in front of the Canary Wharf financial district of London, July 25, 2011. REUTERS/Andrew Winning

Signage for an AT&T store is seen in New York October 29, 2014. AT&T Inc has made a bid for Yahoo Inc's internet business, Bloomberg reported on Wednesday, citing people familiar with the matter. REUTERS/Shannon Stapleton/File Photo

TOPSHOT - Heavy rain clouds move over the central business district in Bangkok on August 29, 2016. / AFP PHOTO / LILLIAN SUWANRUMPHALILLIAN SUWANRUMPHA/AFP/Getty Images

Signage for an AT&T store is seen in New York October 29, 2014. AT&T Inc has made a bid for Yahoo Inc's internet business, Bloomberg reported on Wednesday, citing people familiar with the matter. REUTERS/Shannon Stapleton/File Photo

Hungary's Minister of External Economy and Foreign Affairs, Peter Szijjarto, addresses a speech during the meeting of the Visegrad countries in Budapest on August 29, 2016. / AFP PHOTO / ATTILA KISBENEDEKATTILA KISBENEDEK/AFP/Getty Images

Hungary's Minister of External Economy and Foreign Affairs, Peter Szijjarto, addresses a speech during the meeting of the Visegrad countries in Budapest on August 29, 2016. / AFP PHOTO / ATTILA KISBENEDEKATTILA KISBENEDEK/AFP/Getty Images

Hungary's Minister of External Economy and Foreign Affairs, Peter Szijjarto, addresses a speech during the meeting of the Visegrad countries in Budapest on August 29, 2016. / AFP PHOTO / ATTILA KISBENEDEKATTILA KISBENEDEK/AFP/Getty Images