Well.. What they do is often pejoratively called "front running". A carefully crated google can serve as witness : https://www.google.com/?gws_rd=ssl#q=medallio

Well.. What they do is often pejoratively called "front running". A carefully crated google can serve as witness : https://www.google.com/?gws_rd=ssl#q=medallion+front+running https://www.google.com/?gws_rd=ssl#q=medallion+front+running I certainly meant it in that sense. I'm not accusing the Medallion of illegal front running. I think people like Brad Katsuyama and fixing the "early information" problem are the answer to this kind of behavior. Katsuayama is working on a system to make the fight between high frequency traders and other investors more fair. Good write up is here : http://www.nytimes.com/2014/04/06/magazine/flash-boys-michael-lewis.html http://www.nytimes.com/2014/04/06/magazine/flash-boys-michae... ... "Coil the fiber. Instead of running straight fiber between the two places, why not coil 38 miles of fiber and stick it in a compartment the size of a shoe box to simulate the effects of the distance. And that’s what they did."