High-Frequency Trading: What's Next?
Let's pause for a moment, if the lightning pace of high-frequency trading permits us to do so. In the U.S. today, high-frequency, electronic, computer-aided trading accounts for as much as 65 percent of all stock-volume activity. Computers whiz and hum. Black boxes send out trading orders in thousands and millions of shares, and rout orders to exchanges and "dark pools" all over the globe. Execution occurs in fractions of a second. Algorithms and programs determine what to buy, when to buy, when to sell, when to buy and sell at the same time and on which one of a dozen or more electronic exchanges. Algorithms provide guidance on volume, prices to show, prices to execute, and prices, if only for a few seconds, to report as "bids" or "offers." High-frequency traders dart in and out of trading positions in seconds. Some firms buy in one venue and sell in another. They earn pennies per share, but generate large profits via big volume--tens of thousands of...