Traders work on the floor of the New York Stock Exchange Wednesday, Nov. 30, 2011.
Traders work on the floor of the New York Stock Exchange Wednesday, Nov. 30, 2011. AP
Traders work on the floor of the New York Stock Exchange Wednesday, Nov. 30, 2011. AP

What’s behind Wall Street’s roller-coaster ride?

October 15, 2014 6:07 PM