Recently, I discovered an interesting phenomenon in trading—many people, including myself, tend to fall into certain psychological traps, and these traps often directly impact trading performance.

The most common one is the disposition effect. Simply put, we tend to sell winning positions too early, but are reluctant to cut losing positions. Sounds familiar, right? The underlying psychological mechanisms are actually two—loss aversion and cognitive dissonance. Loss aversion is easy to understand; people fear losses much more than they desire gains, so we instinctively resist confirming losses. Cognitive dissonance occurs when reality doesn't match our expectations; to ease that discomfort, we tend to hold on, hoping the market will reverse.

The consequences of this are quite serious. Holding losing positions long-term drags down overall returns, and when funds are locked in, it becomes difficult to diversify effectively, increasing risk significantly. During market volatility, this concentration risk accelerates losses. At the same time, emotional stress persists—regret over selling profitable positions and anxiety over ongoing losses.

The way to avoid this trap isn't complicated. First, develop a clear trading plan based on your financial goals, including when to enter, when to cut losses, and how to allocate assets. Second, regularly review your investment portfolio to ensure your holdings align with your objectives. Most importantly, beware of overconfidence bias—don't assume you can predict the market accurately; practice more with demo accounts.

Besides the disposition effect, there's another equally tricky psychological bias called the endowment effect. Simply put, the endowment effect is our tendency to overvalue what we own. For example, the asset you hold might be worth far more in your mind than its actual market value. This emotional attachment leads to irrational decisions—despite market signals suggesting you should sell, you hesitate because of your emotional connection to the asset.

The root of the endowment effect is also loss aversion. When we own something, the pain of losing it outweighs the pleasure of gaining it, so we tend to maintain the status quo. At the same time, we often overlook opportunity costs, assigning excessive value to what we own.

In trading, the endowment effect manifests clearly. Traders often overvalue their current holdings compared to market prices or hesitate to buy new assets, believing their existing assets are more valuable. This directly affects asset allocation efficiency.

How to counteract the endowment effect? The key is to return to market reality. First, focus on the actual market value of assets, not the value you wish to see. Second, clarify your trading goals and methods to help maintain rationality and reduce emotional dependence on individual trades. Third, build a diversified portfolio to reduce attachment to single assets.

Ultimately, whether it's the disposition effect or the endowment effect, they are weaknesses rooted in human nature. Traders who want to perform better must recognize these psychological traps and proactively establish rules and discipline to combat them. Planning, regular review, diversification, and rational decision-making—these seemingly simple methods are the foundation for long-term stable profits.