High Frequency Trading - Should We Slow Down?
By 2010 high-frequency trading accounted for over 70% of equity trades in the US and is rapidly growing in popularity in Europe and Asia.
A July, 2011 report by the International Organization of Securities Commissions (IOSCO), an international body of securities regulators, concluded that while "algorithms and HFT technology have been used by market participants to manage their trading and risk, their usage was also a clearly a contributing factor in the flash crash event of May 6, 2010".