I believe the profits have dropped a lot recently, as competition has driven down margins for everyone involved. http://www.businessweek.com/articles/2013-06-0

I believe the profits have dropped a lot recently, as competition has driven down margins for everyone involved. http://www.businessweek.com/articles/2013-06-06/how-the-robots-lost-high-frequency-tradings-rise-and-fall http://www.businessweek.com/articles/2013-06-06/how-the-robo...