The Globe and Mail reports in its Tuesday edition that the United States' newest stock exchange has arrived, and its owners want to slow high-frequency traders with speed bumps. An Associated Press dispatch to The Globe says that IEX Group has won approval from the Securities and Exchange Commission to become a national stock exchange, following months of arguments with hedge funds and high-speed traders. One of IEX's hallmarks is imposing a delay of 350 millionths of a second on orders. That speed bump is meant to limit the influence of high-speed traders, who critics say reap unfair profits at the expense of everyone else in the market. IEX and chief executive officer Brad Katsuyama were featured in Flash Boys, the book by Michael Lewis that heightened critical attention on traders who make transactions in billionths of a second. Opponents of IEX, including hedge funds, argued to the SEC that the speed bump could make price quotes for stocks unreliable and could have unintended consequences. They also argued the delay would run against regulations related to "immediately accessible orders." The SEC said, "A small delay will not prevent investors from accessing stock prices in a fair and efficient manner."