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The Dangers Of Machine Readable News

22

December, 2011

The above chart is not the May 6th flash clash. It is an intraday chart of Constellation Energy from yesterday. If you ever wanted an example of how machine readable news and trading bots can wreck a stock in a matter of minutes, then look no further than the above chart. Let’s reconstruct the events as they happened:

11:58 – Headline crosses that “US sues to block Excelon acquisition of Constellation Energy “. CEG is trading at $38.93 at the time of headline.
12:03 – CEG is halted due to a circuit

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