HONG KONG (MarketWatch) - U.S. authorities are considering radical new measures to shore up ailing financial markets, including guaranteeing billions in bank debt and insuring all U.S. bank deposits for a temporary period, according to a report Friday in The Wall Street Journal's online edition. http://www.marketwatch.com/news/sto...x?guid={3CD5A9F0-1306-471A-AE0B-C2BE9F283760}