Former physicist investigates May 6 flash crash

(PhysOrg.com) -- Ever since the "flash crash" of May 6, 2010, investors have been wondering exactly what happened that Friday afternoon. As stock markets were trending down due to concern about the debt crisis in Greece, the Dow Jones Industrial Average suddenly plunged 600 points in about 5 minutes. Then 20 minutes later, the Dow recovered most of the loss, and finished the day down more than 200 points.

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