The fear of missing an opportunity drives you to buy after a sharp rise, often at the worst time. When everyone is talking about an asset, it is usually too late. Solution: define your entry criteria in advance and stick to them. If you missed the train, wait for the next station.

Losing 100 EUR hurts twice as much as gaining 100 EUR feels good. This bias drives you to hold losing positions too long (hoping for a rebound) and to cut winners too early (for fear of losing them). Solution: use systematic stop-losses and let your winners run.

We instinctively seek information that confirms our opinion and ignore information that contradicts it. If you are convinced Apple will rise, you will only read bullish analyses. Solution: actively seek opposing arguments before every trade.

We fixate on an arbitrary reference price. 'I bought at 150 EUR, so I won't sell below that.' The market does not care about your purchase price. Solution: evaluate each position based on its current value, not its entry price.

After a few winning trades, you feel invincible and increase risk. This is often when losses come. Solution: maintain consistent risk management, regardless of your recent track record.

Following the crowd gives a sense of security, but the majority of investors lose money. Speculative bubbles are the direct result of this bias. Solution: think independently and be wary of consensus.

You refuse to sell a losing asset because you have already 'invested too much' in time, money, or emotion. Every lost euro will not come back by holding the position. Solution: every day is a fresh start. Ask yourself: 'If I didn't have this position, would I buy it today?'