►Subscribe to the Financial Times on YouTube: http://bit.ly/FTimeSubs Exchange traded funds (ETFs) offer the chance to capture the returns of a whole index, but how do they work? The FT's senior investment columnist, John Authers, explains how they operate and what risks investors could face. ► FT Markets: http://bit.ly/1J5HNd3 ► FT Global Economy: http://bit.ly/1J5mmqH ► Making Waves on Sydney's Silicon Beach http://bit.ly/1HL38bC Twitter https://twitter.com/ftvideo Facebook https://www.facebook.com/financialtimes