Officials today announced they can trace May’s stock market flash crash to a single transaction. On May 6, 2010, at 2:32 pm, Waddell & Reed Financial of Kansas initiated the sale of 75,000 E-Mini Standard & Poor’s 500 futures contracts. A sale of this size, about $4.1 billion worth, would usually happen over five hours, but instead the trading algorithms sold them within 20 minutes “without regard to price or time.” At 2:42 pm, markets starting plunging 5% in five minutes. [More]
