Love him or hate him, every once in a while Mark Cuban makes sense. Here’s one of those times: http://blogmaverick.com/2012/09/21/what-business-is-wall-street-in-3/
He makes the case that high volume traders are the equivalent of hackers searching for every exploitable weakness in a system. It’s a far cry from the original intent of publicly traded stocks — provide capital so that companies can grow, develop new products, and hire new talent.