Why Stock Traders Worry About European Banks

Major European share markets closed lower on Friday, ending another turbulent week. On Wall Street, falls extended in late trade to take the Dow Jones to a close of 1.57%. Many factors account for the volatility of the markets. Among the most worrisome are concerns about the strength of European banks. Host Lisa Mullins talks to New York-based market analyst Otis Casey, of Markit Financial Information about this crisis of confidence.