Jones is widely credited with predicting, and profiting, from the stock-market crash on Oct. 19, 1987, which saw the Dow lose nearly 23% of its value, marking the largest one-day percentage decline for the blue-chip benchmark in its history. Jones founded Tudor in 1980 and became known for trading everything from currencies to commodities. His record has featured middling returns and an exodus of billions from his hedge fund in more recent years. According to a Forbes list of billionaires, Jones boasts a net worth of $4.7 billion
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