On December 1, the National Bureau of Economic Research officially declared that the U.S. economy had entered recession in December 2007, a full year earlier. (See late 2000s recession) The Labor Department said that the US lost 533,000 jobs in November 2008, the biggest monthly loss since 1974. This raised the unemployment rate from 6.5% to 6.7%. On December 11, the FBI announced the arrest of Bernard Madoff in a Ponzi scheme which totaled $50 billion by Madoff's own estimate, and which was soon found to affect banks, individuals, and charities in the U.S. and Europe.