A Banamex bank advertisement is seen in Mexico City August 28, 2014. REUTERS/Tomas Bravo

A specialist trader works at his post on the floor of the New York Stock Exchange (NYSE) in New York City, U.S., September 15, 2016. REUTERS/Brendan McDermid

A Wells Fargo branch is seen in the Chicago suburb of Evanston, Illinois, U.S. on February 10, 2015. REUTERS/Jim Young/File Photo

A Wells Fargo branch is seen in the Chicago suburb of Evanston, Illinois, U.S. on February 10, 2015. REUTERS/Jim Young/File Photo

Model plane builder Otto Dieffenbach III makes his remote control plane resembling Donald Trump release fake money as it flies over the beach next to a similar plane resembling Hillary Clinton in Carlsbad, California. REUTERS/Mike Blake

11-Year-old Millie March wears socks with the image of Republican presidential nominee Donald Trump on them at a Trump campaign event at the Trump International Hotel in Washington, D.C., U.S., September 16, 2016. REUTERS/Mike Segar

Republican presidential nominee Donald Trump walks away from the podium after stating that he believes U.S. President Barack Obama was born in the United States at a campaign event at the Trump International Hotel in Washington, D.C., U.S., September 16, 2016. REUTERS/Mike Segar

Democratic nominee Hillary Clinton's campaign plane flies over New York city, U.S., September 16, 2016. REUTERS/Carlos Barria