So says a recent story from Reuters, predicting it will take only three to four years for Asia to catch up to the US:
Japan is the only market that comes close right now to the HFT seen in western markets. ... [T]he proportion of trades classified as high frequency [is] around 30 percent . . ..
High frequency trading now accounts for as much at 70 percent of turnover in US equity markets, where have HFT systems are dealing with up to 2.3 million messages per second in some cases.
Read the full story here.