The magnetic attraction of the Flash Crash

Flash crash physics

Gregg Berman, senior policy adviser in the US Securities and Exchange Commission's (SEC) division of risk, strategy and financial innovation, delivered his much-anticipated report on the so-called flash crash at the end of September.

The report was intended to shed light on the strange data - dubbed ‘crop circles' - surrounding the 20-minute period on May 6, when stocks fell precipitously then just as quickly rebounded.

Commenting on the SEC and CFTC report, Berman said, on 13 October 2010, "In

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