Trading, technology and markets are back in focus. Richard Balarkas, Quendon Consulting managing director, explains to FT Trading Room editor Philip Stafford how speed has changed trading and why regulators find market infrastructure hard to simplify.<br /><br />For more video content from the Financial Times, visit http://www.FT.com/video<br /><br />Subscribe to the Financial Times on YouTube; http://goo.gl/vUQx5k<br />Twitter https://twitter.com/ftvideo<br />Facebook https://www.facebook.com/financialtimes
