The behaviourist

A background in zoology and marine biology has informed Iain Stewart's patient and intelligent investment style - just don't go telling him that finance is a science

As a successful fund manager with Newton for nearly 25 years, with a style notable for its patience and intelligence, it takes a lot to irk Iain Stewart, but equating finance to science is certain to provoke an interesting reaction. “It creates roles and layers that probably aren’t really necessary. This has all flowed from the academic idea of how finance works and that all you need is some sort of equation and you can just slot in the different players. “Creating the idea that you can operate like that over the long run is a bit untruthful but that’s the way the industry has moved a...