Greek Stocks Listed In The U.S. Get Hammered

U.S.-listed shares of Greek companies plunged Monday, illustrating the fears around that troubled country, where the local stock market is closed. National Bank of Greece's stock was last down 20%, while Greek shipping companies DryShips and Seanergy Maritime Holdings dropped by 6.3% and 8.2%, respectively. A U.S.-listed exchange-traded fund that tracks Greek companies also was diving and grabbing the spotlight Monday.