U.S. existing home sales tumble in warning sign for housing market

``U.S. home resales fell sharply in February in a potentially troubling sign for America's economy which has otherwise looked resilient to the global economic slowdown. The National Association of Realtors said on Monday existing home sales dropped 7.1 percent to an annual rate of 5.08 million units, the lowest level since November... Sales fell across the country, including a 17.1 percent plunge in the U.S. Northeast.''