Confirmation Bias

In behavioral finance, confirmation bias can affect investors who become attached to a particular view about a stock, market, or investment strategy.

Once an investor forms an opinion, they may:

• Search for information that supports it
• Ignore or dismiss contradictory evidence
• Follow analysts who share the same view
• Interpret ambiguous news in a favorable way
• Underestimate risks that challenge their original belief

For example, suppose an investor believes a company will grow rapidly.

They may focus on rising sales and positive management comments while ignoring weak cash flow, increasing debt, or declining margins.

This can lead to poor decisions because the investor is not evaluating all available information objectively.

Confirmation bias is especially dangerous when combined with overconfidence, because the investor may become increasingly certain despite receiving evidence that should weaken the original view.

Only Looking for Positive Evidence

Suppose Neha invests ₹3 lakh in a company's shares because she expects strong future growth.

Later, the company reports slower revenue growth and higher debt.

Instead of reconsidering her investment, Neha reads only bullish research reports and ignores negative analyst commentary.

She continues to hold the stock because the information she chooses to follow supports her original view.

This shows how confirmation bias can cause investors to reinforce existing beliefs instead of reassessing them objectively.