Warren Buffett has announced he is stepping down as CEO of his company, Berkshire Hathaway.

Buffett is one of the richest people in the world, and is widely held up as the greatest investor who ever lived. He’s also been remarkably critical of other masters of the financial universe.

Tim Harford talks to Financial Times journalist Robin Wigglesworth, author of the book Trillions, about Buffett’s money making method, and how he used a massive bet to make a point about hedge funds.

Presenter: Tim Harford Producer: Tom Colls Production co-ordinator: Brenda Brown Sound Mix: Giles Aspen Editor: Richard Vadon