With sophisticated high-frequency trading and quant funds, it seems that the proverbial Hal 9000 has taken over Wall Street. Of course, a stark example of this was in May 6, in which the market inexplicably lost $862 billion in market value within 20 minutes. It was the "Flash Crash."
Since then, the SEC and other government regulators have been investigating the matter. Already, there are some changes that have been put in place, such as circuit breakers. And yes, these have been triggered in some cases already.
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