ETFs make it easy to invest in emerging markets, and they are increasingly the most popular vehicle for doing so. However, John Authers analyses whether liquidity may come at the cost of poorer investment performance, and whether it stokes volatility<br /><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
