A banner for communications software provider Twilio Inc., hangs on the facade of the New York Stock Exchange (NYSE) to celebrate the company's IPO in New York City, U.S., June 23, 2016. REUTERS/Brendan McDermid

The logo of UBS bank is seen in Brussels June 20, 2014. REUTERS/Francois Lenoir/File Photo

A migrant is covered with a blanket after a fire at the Moria migrant camp on the island of Lesbos, Greece, September 19, 2016. Intimenews/Manolis Lagoutaris/via REUTERS

Refugees and migrants stand at the closed gate of the Moria migrant camp, after a fire at the facility, on the island of Lesbos, Greece, September 19, 2016. Intimenews/Manolis Lagoutaris/via REUTERS

Refugees and migrants stand at the closed gate of the Moria migrant camp, after a fire at the facility, on the island of Lesbos, Greece, September 19, 2016. Intimenews/Manolis Lagoutaris/via REUTERS

An aerial view of a forest fire burning near the village of Bokor, Meranti Islands regency, Riau province, Sumatra, Indonesia in this March 15, 2016 file photo taken by Antara Foto. REUTERS/ Rony Muharrman/Antara Foto/Files

A man walks past the headquarters of the People's Bank of China (PBOC), the central bank, in Beijing November 20, 2013. REUTERS/Jason Lee/File Photo

U.S. Democratic presidential candidate Hillary Clinton meets with Japan's Prime Minister Shinzo Abe at a hotel in New York, U.S. September 19, 2016. REUTERS/Carlos Barria