CNBC: Mysterious Algorithm Was 4% of Trading Activity Last Week

[amanda.jayne]

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.​

http://www.cnbc.com/id/49333454

 

[JamieSignorile]

I just saw this story on CNBC. Interesting... They also just mentioned some unusual trading in Pandora and NYSE is looking into it... They suspect HFT and dark pools.

http://www.bloomberg.com/news/2012-...f-spur-concern-of-trade-error.html?cmpid=yhoo