August 1, 2012
45 Minutes: Knight Capital's Lost Morning
There is a story this week, and the story is the morning: Wednesday, August 1, when Knight Capital Group, one of the largest market makers in the United States, lost control of its machines. The machines are the market, and the market is the flood: millions of erroneous orders fired into roughly 150 stocks in 45 minutes, buying high and selling low, spiking prices and collapsing them. The firm stopped its trading, the shares fell about a third, and the cause was a software update deployed incorrectly. The lost morning is the August 2012 story, and the story is the lesson: the code that runs the market, the kill switch that was not triggered in time, the machines that no one fully controls.
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