IMAGINE if the stock market were hijacked by computers that executed trades in a fraction of the time that it takes to blink. Since no mere mortal could understand the “thinking” behind such nanosecond trading, ordinary investors — even longtime institutional traders — would have little clue as to why any company’s share price was moving up or down in any moment. The values of well-established corporations would sometimes swing wildly from one second to the next and we slow-reacting, human investors wouldn’t know why.
You don’t really have to imagine this. This is how our stock markets function today. Some 50 percent to 70 percent of all trading is done by “traders” who live in server parks, are nourished by direct current and speak only in binary pulses.
Keep reading: Putting the Brakes on High-Frequency Trading – NYTimes.com.
