5 Daily Habits That Built Charlie Munger's Investing Mind

Charlie Munger, vice chairman of Berkshire Hathaway for decades, spent nearly a century sharpening one of the clearest minds in American business. He never claimed he was born brilliant. What he described instead were habits, most of them fairly boring, that he repeated every day until they paid off.

Munger read constantly. Books filled most of his free hours, and he had little patience for people who claimed to want wisdom while skipping the reading. "In my whole life, I have known no wise people (over a broad subject matter area) who didn't read all the time. None, zero," Charlie Munger said. His reading went far past annual reports. He loved biographies and read widely in science and history, which gave him a deep well of examples to draw on whenever a new problem landed on his desk.

Most people collect evidence that agrees with them. Munger went looking for the facts that would prove him wrong, and he treated finding them as a win. "We are all learning, modifying, or destroying ideas all the time. Rapid destruction of your ideas when the time is right is one of the most valuable qualities you can acquire," Charlie Munger said. He also refused to take a position until he had done the work on the other side of it. "I never allow myself to have an opinion on anything that I don't know the other side's argument better than they do," Charlie Munger said.

Munger thought narrow expertise was risky on its own. A specialist who knows only one field tends to force every situation into that field's way of seeing things. He described his alternative in a 1994 talk at the USC Business School. "You've got to have models in your head. And you've got to array your experience, both vicarious and direct, on this latticework of models," Charlie Munger said. He pulled those models from psychology, economics, biology, physics, and math. In the same talk, he warned about what happens to people who rely on just one or two. "The nature of human psychology is such that you'll torture reality so that it fits your models, or at least you'll think it does," Charlie Munger said.

Munger picked up the habit of inversion from Carl Jacobi, a 19th-century German mathematician who urged people to invert hard problems. Instead of asking how to succeed, Munger asked what would guarantee failure, then steered clear of it. His favorite way of explaining it came from an old rustic saying he repeated for years. "All I want to know is where I'm going to d*e, so I'll never go there," Charlie Munger said. He also believed that avoiding stupidity paid better than chasing genius. "It is remarkable how much long-term advantage people like us have gotten by trying to be consistently not stupid, instead of trying to be very intelligent," Charlie Munger said.

Munger spent his career watching money compound, and he applied the same math to knowledge. His instructions were plain. "Spend each day trying to be a little wiser than you were when you woke up. Discharge your duties faithfully and well. Step by step, you get ahead, but not necessarily in fast spurts," Charlie Munger said. He returned to the idea in his 2007 commencement speech at the USC Gould School of Law, where he called the people he'd seen rise in life "learning machines." "They go to bed every night a little wiser than they were when they got up, and boy does that help, particularly when you have a long run ahead of you," Charlie Munger told the graduates.

Munger had an unusually long run. He died in November 2023, about a month short of his 100th birthday, and he was still reading and fielding questions at shareholder meetings into his late nineties. None of these habits take special talent. They take repetition and a willingness to look foolish to yourself now and then when an idea you liked falls apart.

Start with whichever one feels least natural. For most people, that's the second habit, because arguing against your own opinions stings in a way that reading a book never does.