“All I want to know is where I’m going to die, so I’ll never go there.” — Charlie Munger
Arjun had always thought about investing the same way: which stock should I buy next? Which sector will outperform this quarter? What should my next move be?
Then he read about Charlie Munger and realised he’d been asking entirely the wrong questions.
“Invert, always invert,” Munger famously said. Instead of asking what will make me succeed, ask what will guarantee I fail. Then avoid those things with obsession.
For Arjun, this reframe was clarifying. He stopped asking “what should I buy?” and started asking “what mistakes am I currently making that will cost me money over the next 20 years?” The answers were uncomfortable but useful.
Who Was Charlie Munger?
Charlie Munger was Warren Buffett’s partner at Berkshire Hathaway for over 50 years. A lawyer by training, Munger was the intellectual architect behind much of Berkshire’s philosophy. He believed investing was fundamentally about thinking clearly — using mental models borrowed from psychology, physics, mathematics, and biology.
He died in November 2023 at the age of 99, leaving behind a body of wisdom that is arguably more useful to ordinary investors than almost any financial textbook.
Mental Model 1: Inversion
Inversion means approaching problems by working backwards from failure. Applied to investing: don’t ask “how do I get rich?” Ask: “what behaviours reliably destroy wealth?” The answers — acting on tips, trading too frequently, taking on leverage, investing short-term money in equity markets, chasing returns — are well-established. Avoiding them is the majority of the battle.
Mental Model 2: The Lollapalooza Effect
Munger coined this term for situations where multiple biases reinforce each other to produce extreme outcomes. In investing, this happens during market crashes: fear, recency bias, social proof, and loss aversion all activate simultaneously. The result is panic-selling at the worst possible moment. Recognising that you are in a lollapalooza moment is the first step to not making a decision you’ll regret.
Mental Model 3: Avoiding Envy
In investing, envy manifests as comparing your portfolio returns to someone else’s — your colleague who made 40% in small-caps, your cousin who bought crypto at the right time. These comparisons cause you to abandon a sound strategy for a risky one based on someone else’s temporarily superior results. Your strategy is built for your goals — not someone else’s.
Mental Model 4: First Principles
Munger preferred to reason from first principles. Applied to personal finance: instead of asking “which fund should I buy?”, ask “what is this product actually doing with my money, and does that align with my goals?” The answer often leads to simpler, more appropriate structures.
What Arjun Does Now
He keeps a checklist before any investment decision: Am I inverting correctly? What biases might be operating on me? Am I comparing myself to someone else’s returns? Do I understand what this product actually does? He doesn’t always get it right. But he’s asking better questions. Munger would probably say that’s enough.
The Planner Advantage
Munger’s mental models are powerful — but most investors don’t have the time or training to apply them rigorously to their own financial decisions. A financial planner operates as an institutionalised version of these models. They invert your decisions before you make them: “what could go wrong here?” They identify when you’re in a lollapalooza moment — multiple biases reinforcing each other — and slow you down. They remove envy from the equation by keeping your focus on your own goals and timeline, not your colleague’s returns. They reason from first principles about your portfolio: does each product you own actually serve your goals, or are you holding it because someone told you to?