Regulators and investors are struggling to meet the challenges posed by high-frequency trading. This ultra-fast, computerised segment of finance now accounts for most trades. HFT also contributed to the “flash crash”, the sudden, vertiginous fall in the Dow Jones Industrial Average in May 2010, according to US regulators. However, the HFT of today is very different to that of three years ago. This is because of “big data”.
监管机构和投资者疲于应对高频交易(HFT)带来的难题。这种速度极快的计算机化金融活动如今占据了交易的大头。美国监管部门认为，高频交易一手制造了2010年5月的“闪电暴跌”(flash crash)，令道琼斯工业平均指数(Dow Jones Industrial Average)突然大跌。然而，现在的高频交易已与三年前大不相同，这是“大数据”造成的。
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