The Risks and Rewards of Short Selling a Stock: A Closer Look at the Practice of Trading Short
Anchoring bias distorts judgment and leads stock traders to make costly mistakes. Here’s how:
1. Holding Onto Losing Trades
Traders often refuse to sell a stock at a loss because they’re anchored to the purchase price they originally paid. Instead of objectively assessing the new market reality, they wait for the stock to return to its original anchors, which may never happen.
Example: A trader buys a stock at $50 per share, but it drops to $40. Instead of reassessing external factors like earnings reports or industry trends, or the sell signal they received from their trading system, they refuse to sell, thinking, “I’ll wait until it gets back to $50 to break even.” Meanwhile, the stock price continues to decline.
2. Hesitating to Buy Stocks at Higher Prices
If a trader sees a stock trading at $100 but remembers it being $70 a few months ago, they may hesitate to buy—even if all signs point to further growth. Their mind is stuck on the outdated average appraisal price.
Example: A company’s stock price is $110, but you remember when it was $50 just six months ago. Instead of analyzing its long-term investment value, you anchor to the old price and miss a profitable opportunity.
3. Misjudging Market Trends
Stock traders who are anchored to historical values usually struggle to accept new information. This often results in poor decision-making, missed opportunities, or excessive risk-taking.
Example: A bull market environment is a perfect example of when a trader assumes that prices will keep rising simply because they’ve anchored to past price hikes. They fail to realize signs of exhaustion, leading to losses when the trend reverses.
Even seasoned institutional investors fall victim to this bias. Research in behavioral finance studies has shown that analysts sometimes anchor their earnings forecasts to industry averages, leading to inaccurate pricing models. When analysts underestimate earnings for firms with higher-than-average EPS, these stocks outperform expectations, while those with low EPS often underperform.
