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Mysterious Algorithm Was 4% of Trading Activity Last Week

Posted By aaron On October 9, 2012 @ 12:37 pm In Economic Crisis,Old Infowars Posts Style | Comments Disabled

John Melloy
October 9, 2012

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.

The program placed orders in 25-millisecond bursts involving about 500 stocks, according to Nanex, a market data firm. The algorithm never executed a single trade, and it abruptly ended at about 10:30 a.m. ET Friday.

“Just goes to show you how just one person can have such an outsized impact on the market,” said Eric Hunsader, head of Nanex and the No. 1 detector of trading anomalies watching Wall Street today. “Exchanges are just not monitoring it.”

[…] “My guess is that the algo was testing the market, as high-frequency frequently does,” says Jon Najarian, co-founder of TradeMonster.com.

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