The Trader Who Fell To Earth
Bloomberg Businessweek|May 18, 2020
A new book reveals fresh details about the man blamed for helping cause the 2010 Flash Crash that erased $1 trillion of value in minutes
Pat Regnier
The Trader Who Fell To Earth

On March 9, U.S. stocks had their biggest one-day point drop ever as the economic fallout from the novel coronavirus sank in. Within a week that record had been broken twice, only for the S&P 500 to register its greatest weekly gain in decades in April, after the Federal Reserve intervened by slashing interest rates and buying bonds.

This rattle of volatility arrives 10 years after another famously tumultuous episode in the markets—the so-called Flash Crash of May 6, 2010, when, without warning, the S&P 500 plummeted 5% in four minutes, temporarily erasing $1 trillion. The incident sparked a government investigation and led to questions about whether the rise of high-frequency trading was having a destabilizing impact on the markets. In the end, the U.S. Department of Justice focused on a different culprit: a 36-year-old day trader named Navinder Singh Sarao who operated out of his bedroom in his parents’ suburban semidetached house on the outskirts of London.

With no ties to the world of high finance, Sarao accumulated $70 million buying and selling futures as if he were playing a computer game. The bulk of his winnings came during periods of extreme volatility. He also manipulated the markets, according to the U.S. government, creating a computer program that placed then canceled huge volumes of orders to deceive other participants about supply and demand—a brand-new offense known as “spoofing.” Authorities were careful to assert that Sarao’s antics had only contributed to the crash, essentially by creating false signals others reacted to, but that nuance was lost in the ensuing press coverage.

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