A trader rests his handheld device on his head as he works on the floor of the New York Stock Exchange Friday, Jan. 31, 2014.
A trader rests his handheld device on his head as he works on the floor of the New York Stock Exchange Friday, Jan. 31, 2014. ASSOCIATED PRESS
A trader rests his handheld device on his head as he works on the floor of the New York Stock Exchange Friday, Jan. 31, 2014. ASSOCIATED PRESS