A look at Dark Pools: http://www.cnn.com/video/data/2.0/video/business/2014/09/26/cnn-orig-what-is-wall-street-dark-pool-paul-lamonica.cnn.html
and from Bloomberg:
"The biggest banks created the venues partly to avoid paying stock exchanges for processing trades between their clients. They’ve attracted scorn this year for allegedly letting the speediest traders feast on slower investors. New York Attorney General Eric Schneiderman accused Barclays Plc of soliciting “predatory” high-frequency traders on its dark pool while hiding their presence from other customers.And more from Bloomberg:
The venues accounted for 16.5 percent of all U.S. stock trading in the first eight months of the year, according to data compiled by Rosenblatt Securities Inc."
'via Blog this'