One High-Speed Trader Made 4 Percent Of The Stock Market’s Trades Last Week

One High-Speed Trader Made 4 Percent Of The Stock Market’s Trades Last Week: A single computer program placed and canceled orders that made up four percent of the stock market’s entire volume of trading last week, according to Nanex, a top tracker of high-frequency trading. The high-frequency computer trading system made and canceled orders every 25 milliseconds on about 500 different stocks, Nanex said, before stopping Friday morning. [...]/p