U.S. regulators' report on the "flash crash" provides plenty of ammunition for critics and defenders of high-speed trading, according to The Economist. However, regulators found that the crash was triggered by a plain-vanilla mutual fund group using algorithmic trading, not by high-speed trading. "As the blame game continues, the real question will be whether the report, and the measures taken to avoid a repeat, help to restore confidence in today's market structure," the magazine notes.

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