Michael Lewis, author of The Undoing Project and, previously, The Big Short. Photograph: TJ Kirkpatrick/Getty

Investors have long lapped up the work of Michael Lewis, the author of financial bestsellers such as Liar’s Poker, Flash Boys and The Big Short. Lewis(...)

Stock picking: Investors often buy into a story, and forget to look for evidence to back up their assumptions.

Most of us are “predictably irrational”, to quote behavioural finance author Dan Ariely, relying all too often on a dodgy sense of intuition an(...)

Picking stocks: investors have reason to be grateful to devotees of the efficient market hypothesis and behavioural finance.  photograph: andrew burton/getty images

Are markets efficient, or are investor actions governed by animal instincts? Is it pointless trying to beat the market, or are stocks prone to systema(...)