From Business Spectator, video interview with the chief executive of institutional equities marketplace Liquidnet discusses his concerns over the fragmentation of exchange platforms and the growth of high frequency trading.
Seth Merrin, with Alan Kohler, Robert Gottliebsen, Stephen Bartholomeusz
http://www.businessspectator.com.au/bs.nsf/KGBTV?Readform&groupid=APLM-8Y599S&type=full