“A single mysterious computer program that placed orders — and then subsequently canceled them — made…”: “A single mysterious computer program that placed orders — and then subsequently canceled them — made up 4 percent of all quote traffic in the U.S. stock market last week, according to the top tracker of high-frequency trading activity. The motive of the algorithm is still unclear.”

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Mysterious Algorithm Was 4% of Trading Activity Last Week – CNBC.com – US Business News – CNBC
Also, expect to read sentences like “the motive of the algorithm is still unclear” a lot in the coming years.

(via mwfrost)