On this edition of Wall Street Week, Ed Hyman, Evercore ISI Chairman & Bob Prince, Bridgewater Associates Co-CIO wrap up a turbulent week in the markets. Lawrence H. Summers, Former U.S. Treasury Secretary and Niall Ferguson, Hoover Institution Senior Fellow join David Westin to discuss the latest on the Fed and how to invest in a rough environment. Plus, Stephanie Flanders, Bloomberg Senior Executive Editor & Head of Bloomberg Economics shares her thoughts on the world's central banks.