Rise of the Machines

Vi er styret af robotter. En enkelt tastefejl eller noget lignende førte til computeraaargh.

In recent years, what is known as high-frequency trading — rapid automated buying and selling — has taken off and now accounts for 50 to 75 percent of daily trading volume. At the same time, new electronic exchanges have taken over much of the volume that used to be handled by the New York Stock Exchange. (...)

One official said they identified “a huge, anomalous, unexplained surge in selling, it looks like in Chicago,” about 2:45 p.m. The source remained unknown, but that jolt apparently set off trading based on computer algorithms, which in turn rippled across indexes and spiraled out of control. (...)

For a short while, traders started to distrust what they were seeing.

“There was no pricing mechanism,” Mr. Clancy said. “There was nothing. No one knew what anything was worth. You didn’t know where to buy a stock or sell a stock.”

Jeg tror ikke, at investorer får mere tillid til markedet af det her.