John Paulson is an American hedge fund manager and investor, best known for his successful bets against the subprime mortgage market during the 2007-2008 financial crisis. He founded Paulson & Co., a hedge fund that gained significant attention and profit when the housing market collapsed, earning him billions of dollars. Born on December 14, 1955, in New York City, Paulson graduated from Harvard University with a degree in finance. He has been involved in various investment strategies and has authored books on investing, sharing his insights and experiences in the financial industry.