IN THIS LESSON

Purpose

Teach investors the behaviors and decisions that consistently lead to poor results — regardless of intelligence, education, or market conditions.

These mistakes are behavioral, not analytical.
They come from emotion, impatience, and lack of discipline.

1. Overtrading

Most investors trade too much because they:

  • chase every market move

  • react to news

  • mistake activity for progress

  • try to “optimize” instead of hold

Overtrading increases:

  • fees

  • taxes

  • mistakes

And it destroys the compounding that creates wealth.

2. Emotion-Driven Decisions

The most common pattern in market history:

  • Buy during excitement

  • Sell during fear

This flips the compounding engine upside-down.

Emotional decisions cause investors to:

  • panic in drawdowns

  • buy at market tops

  • sell right before recoveries

  • anchor to headlines instead of fundamentals

Temperament is more important than IQ.

3. FOMO

FOMO shows up as:

  • chasing hot stocks

  • chasing “AI winners”

  • buying high because price is rising

  • confusing popularity with quality

FOMO turns markets into stampedes.
And stampedes always end the same way.

4. No Sell Discipline

Great investors know exactly:

  • why they bought

  • what would invalidate the thesis

  • what signals require trimming or exiting

Most investors never write down a thesis.
So they don’t know when they’re wrong — and don’t know why they sold.

A clear sell framework protects returns.

5. No Investment Thesis

Owning something without understanding it leads to:

  • reacting to volatility

  • copying others

  • misunderstanding risks

  • holding low-quality businesses

  • selling strong businesses too early

If you do not know:

  • what the company does

  • why it wins

  • how it makes money

  • why earnings will grow

  • what valuation implies

— you cannot hold it through volatility.

Thesis clarity = conviction = long-term returns.

Why This Lesson Matters

Skill-based investing succeeds when you:

  • think independently

  • understand what you own

  • control your behavior

  • avoid the traps most investors fall into

You don’t need perfect predictions.
You need to avoid the mistakes that consistently destroy compounding.

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