Investing term

What is Overconfidence?

Mistaking a few lucky trades for skill, then sizing up the next one.

Overconfidence is mistaking luck for skill — letting a few winning trades convince you that you've cracked the market, then betting bigger on the next one. It's one of the most expensive biases, driving excessive trading and oversized positions. Humility, position limits, and a decision journal that records your real hit rate are the practical defenses.

For example

Three lucky wins in a row and an investor doubles their bet size on the fourth — overconfidence setting up the loss that erases the streak.

Overconfidence is taught hands-on in Stage 2 — Why Investing Matters (And When It Doesn't).

See the lesson →

Related terms

Asset classA broad category of investment with similar behavior. Stocks, bonds, cash, real estate, commodities.Behavior gapThe difference between a fund's reported return and what its investors actually earned — usually worse.Dollar-cost averagingInvesting a fixed amount on a fixed schedule, regardless of market level.FOMO buyingFear of missing out — piling into something after it has already run, because everyone else seems to be winning.
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