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”.
監管機構和投資者疲於應對高頻交易(HFT)帶來的難題。這種速度極快的電腦化金融活動如今佔據了交易的大頭。美國監管部門認爲，高頻交易一手製造了2010年5月的「閃電暴跌」(flash crash)，令道瓊工業平均指數(Dow Jones Industrial Average)突然大跌。然而，現在的高頻交易已與三年前大不相同，這是「大數據」造成的。
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