I doubt if there is a living human being that can tell me the value of fast track trading.. Trades that last seconds and ends up being a big competition of who has the fastest computer...
If you think the Libor rigging was a lone wolf, you would be wrong and I am guessing on this.. If you watch commodity prices swing up and down with little or no justification you are watching rigging.. everybody makes a little juice except you and me.. Little guys are not in this game and they add no real value to the market or too beneficial production..
No regulations could be fast enough to control these cannibals . While they have a great chance of crashing the market.. and their goes you 401K or your pension plan.
They only cure is to ban them completely .