In the Balance examines the recent sharp falls in the global markets. Ed Butler asks why volatility is back in the financial markets - after years of relative calm. Ed is joined by one of the world's leading experts in algorithmic computerised trading as well as a fund manager with more than 30 years experience of watching the market highs and lows. But is this time different - is computer driven trading at least partly to blame for an increase in volatility? Should we be in fear of the machines?

Contributors: Gervais Williams, from Miton Group, who has worked in finance in the City of London for more than 30 years

(Picture: Traders React to market volatility on floor of the Cboe Global Markets exchange on February 6, 2018 in Chicago. Credit: Scott Olson/Getty Images)