Bernard Lawrence "Bernie" Madoff is an incarcerated American former stock broker, investment advisor, non-executive chairman of the NASDAQ stock market, and the admitted operator of what has been described as the largest Ponzi scheme in history.

In March 2009, Madoff pleaded guilty to 11 federal crimes and admitted to turning his wealth management business into a massive Ponzi scheme that defrauded thousands of investors of billions of dollars. Madoff said he began the Ponzi scheme in the early 1990s. However, federal investigators believe the fraud began as early as the 1980s, and that the investment operation may never have been legitimate.The amount missing from client accounts, including fabricated gains, was almost $65 billion. The court-appointed trustee estimated actual losses to investors of $18 billion. On June 29, 2009, he was sentenced to 150 years in prison, the maximum allowed.