Charlie Munger

Mental models and patience. Munger, Buffett's partner at Berkshire, argued that good investing means drawing on a latticework of ideas from psychology, economics and other fields, avoiding stupidity rather than seeking brilliance, and doing very little. He favoured a handful of concentrated holdings, including a long stake in China's BYD. His approach is clearer as a way of thinking than as a repeatable method. He died in 2023.