Trading Wisdom | Remember Charlie Munger? Let’s Review His 6 Critical Investment Principles
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Managing initial irrational emotions is crucial. When confronted with significant stimuli, you might exhibit a range of unusual behaviors. However, maintaining rationality in such moments can greatly benefit you.
01 Thinking in Reverse Makes Problems Easier to Solve
Adapting to the workings of complex systems involves "thinking in reverse," which often makes problems more manageable.
Charlie Munger's approach to problem-solving is starkly different from the methods most people use in their everyday lives.
Reverse deduction and inverse thinking are two descriptions of this method.
For instance, a good way to stay happy is to avoid things that cause you pain.
Munger once gave a speech mentioning Johnny Carson, where he said that Carson couldn't tell graduates how to be happy, but he could tell them from personal experience how to be miserable.
Carson identified three things that lead to misery:
- Drugs that alter mood or perception;
- Envy;
- Resentment.
Carson's idea was to think of the issue in reverse: by understanding what makes you miserable, you can figure out how to create happiness.
Another example of Munger's reverse thinking is that a good way to stay smart is to avoid being dumb.
Avoiding stupidity is evidently easier than being smart, as you can follow a few simple principles to avoid making foolish decisions.
Munger also mentioned, "A lot of success in life and business comes from avoiding certain things, such as early death or a bad marriage."

02 Thinking in Reverse Aids Understanding the Essence of Things
Thinking in reverse helps in understanding the essence of things, thus assisting in solving many difficult problems.
Munger once joked that he wanted to figure out where he would die so he would never go there.
He also shared a story:
"I often give my family small puzzles. Not long ago, I posed this one: In the U.S., there is a sport with one-on-one competitions and a national champion. One person won the championship in two competitions separated by 65 years. Now, name the sport."
My son, who is a physicist and influenced by my thinking, immediately came up with the answer. He reasoned it couldn't be a sport requiring hand-eye coordination, as no one can win a national billiards championship at the age of 85. Nor could it be chess, due to its complex rules and endurance demands.
He then thought of checkers, realizing that even at 85, with sufficient experience, one could perform well in this sport.
Unquestionably, this was the correct answer.
If the obvious solutions are usually wrong, what is correct?
The unconventional ones.
In fact, the things most people don't understand or believe are often the best. Like some investment ideas and methods, which, because they aren't widely accepted, offer opportunities for those with sufficient insight.
03 Staying Non-Stupid Makes Us Better in the Long Run
Charlie Munger once said, "Part of the reason Berkshire is so successful is not because we are smart, but because we just avoid being stupid. You might be surprised how much that helps."
This is why Warren Buffett's first and second rules of investing are "Don't lose money."
The hardest part of a value investing system is the emotional and psychological aspect, not understanding the system itself.
The long-term advantage of "staying non-stupid" is greatly underestimated.
Bear in mind, we're talking about the "long-term", which is crucial because it signifies that avoiding stupidity isn't just luck. This state requires humility, especially in areas beyond your capabilities.
Just like someone using tools should understand their limitations, an investor relying on their cognition must know the limits of their understanding.
In life, you have the chance to learn from your inevitable mistakes and those of others. While this process may not yield positive results, it can benefit your investments.
Humility helps reduce mistakes born of arrogance.

04 Be Greedy When Others Are Fearful, and Fearful When Others Are Greedy
Munger advocates for reverse thinking in many scenarios.
He once said, "If you asked me what constitutes true failure in life or what you should most avoid, I would use reverse thinking: consider the qualities you most wish for yourself, and the answer is: controlling primal irrational emotions. When faced with a huge stimulus, you exhibit strange behaviors. If you stay rational during those times, you will benefit."
Christopher Davis, Chairman of Davis Advisors, commented, "Munger uses reverse thinking emotionally as well as intellectually. He seems to reverse his emotions: he disinterests when others are ecstatic, and he invests when others are uncertain or afraid."
This explains why Munger and Buffett give the advice: "Be greedy when others are fearful, and be fearful when others are greedy."
Easier said than done, which is why successful investing is simple but not easy.
05 Don't Be Misled by High Intelligence
Investors often have high intelligence, leading them to assume complex investment decisions are beneficial. In reality, attempting hard tasks doesn't usually yield rewards.
High intelligence might cause investors to prioritize difficult problems, believing their intellect offers an advantage, but that's incorrect.
Munger's viewpoint on this is: "I categorize things as good, bad, and too hard. Unless I have a special insight into something, I put it in the 'too hard' category."
A smarter strategy is to use high intelligence to solve "simple but lucrative problems." Munger enjoys working with those who think they have low intelligence but actually have high IQs.

06 Avoid Tasks That Others Can Do Better
Identify Your Strengths
You need to figure out your own talents. If others have a greater talent in a particular game than you do, you will lose. Identify your strengths and operate within your capacity.
Operate Within Your Circle of Competence
Even if you have certain capabilities, you need to understand the boundaries of those abilities. In fact, everyone should know their strengths better than anyone else, but not everyone does.
This relates to the concept of the "circle of competence." Risks often come from not knowing what you're doing. Hence, it's wise to ensure you operate within your capacity.
"Margin of Safety" also applies here. If your competence boundaries are unclear, you should build in a sufficient margin of safety. Avoid being as incompetent and foolish as your competitors; this will be a significant advantage.
Learn to Properly Self-Assess
Expanding the boundaries of your competence is challenging. What's important is learning to self-assess accurately.
We all have certain talents and skills and should strive to develop them.
However, understanding the limits of your current skills is wise.
Especially when the stakes are high, being conservative in self-assessment is crucial, as overconfidence is a significant source of human error.
People tend to be overly optimistic. For instance, a Swedish survey revealed that 90% of drivers thought their driving skills were above average. Investors, too, rarely claim their performance is below average in public.
Avoid Tasks Others Excel At
Munger said, "Buffett and I avoid doing things that others at Berkshire can do better."
Life becomes easier and more enjoyable if you let those better than you handle tasks.
For Munger, this means focusing on buying moats rather than building them. He leaves moat-building to entrepreneurs and venture capitalists, deeming it "too hard."
