"Large Volume" Trades Outside Recognized Exchanges, Dark Pools

Today on CNBC Larry Tabb of Tabb Group explained that any "large volume" trades outside recognized exchanges in dark pools. It seems to me like high speed liquidity, front-running and hiding trades (whether over-the-counter or in dark pools) for hedge funds and investment institutions is more important than market transparency. At least start a High Frequency Trading ETF to let retail investors join the front-running party.

h/t Zero Hedge