An audio version of the best of the Financial Times's Big Reads — in-depth reporting from FT correspondents around the world. Listen to longform stories that explore and explain key themes in world news, science and business. Produced by Anna Dedhar.
The Vix index is known as Wall Street's 'fear gauge' and was once just a measure of market movements. But volatility has itself become a tradable asset and financial engineers have used the index to create high-risk products and strategies that can act as siren calls to unwary investors, says Robin Wigglesworth