The weak jobs data and a surprise bankruptcy by California's largest utility headed the list of bad news Friday that sent U.S. share prices sharply lower. Ending near their lows, the Nasdaq Composite fell 64.64, or 3.62%, to 1720.36, while the Dow Industrials fell 126.96, or 1.3 percent, to 9791.09. Monthly jobs data, the single most important report on the economy, showed substantial weakness in March, especially in the service sector.