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Psychology of Investing — Why We Make Bad Decisions

The biggest enemy of a good investor is not the market — it is your brain. Fear, greed and herd mentality cause us to buy high and sell low. Here are the most common psychological traps and how to avoid them.
📅 28. April 2026 👁️ 3 views 📂 Strategier 🇳🇴 Les på norsk

Your brain is not built for investing

The human brain is a masterpiece — but it is not designed for the stock market. When everyone is selling in panic and your brain is screaming "sell!" — it is often the worst thing you can do.

"Your greatest enemy and your best friend both live in the same head. Choose wisely who you listen to."— Florence Scovel Shinn

Trap 1 — Herd mentality

The most common and most destructive psychological trap. In a bull market everyone buys — you buy too. In a bear market everyone sells — you sell too. Result: you bought high and sold low.

Trap 2 — Loss aversion

Warren Buffett antidote: "Cut your losers short and let your winners run."

Trap 3 — FOMO (Fear Of Missing Out)

FOMO causes you to buy stocks that have already risen 500% because you are afraid of missing more.

Trap 4 — Overconfidence

Studies show that over 80% of private investors underperform the index over 10-20 years. Most people think they are smarter than the market — they are not.

How to fight the psychological traps

Make a plan
Decide in advance when to buy and sell. A written plan is your best protection against impulsive decisions.
Check less often
Long-term investors who check monthly make better decisions than those who check daily.
The simple advice: Make a plan. Follow it. Ignore the noise.
"Master yourself — and you have mastered the world. The inner battle is always greater than the outer."— Florence Scovel Shinn

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