Herd Mentality
Herd mentality, also called herd behaviour, is the tendency to follow what a large group of investors is doing instead of relying on your own analysis or plan. It feels safe to move with the crowd, but crowds tend to buy after prices have already risen and sell after they have already fallen.
Herd mentality is often driven by FOMO (fear of missing out) on the way up and by panic on the way down. In both directions, it pulls investors away from decisions based on their own goals.
How herd mentality shows up in investing
Heavy oversubscription and grey market buzz draw investors into IPOs they have not researched. Many popular listings have gone on to trade below their issue price.
A sector or theme becomes the talk of the market, new funds launch to meet demand, and money floods in near the peak of interest.
Social media and stories of quick profits pull retail investors into futures and options. A SEBI study found that 93% of individual F&O traders lost money between FY22 and FY24.
When markets fall sharply, seeing others sell makes selling feel like the safe choice, even for long-term investors with no need for the money.
Messaging groups and influencers recommend the same stocks, creating a rush of buyers who do not know why they own them.
Why investors follow the herd
- Social proof: If many people are doing something, it feels more likely to be right.
- Fear of missing out: Watching others profit creates pressure to join in, especially after a long rally.
- Safety in numbers: Being wrong along with everyone else feels less painful than being wrong alone.
- Information shortcuts: Copying others feels easier than doing your own research, particularly with complex products.
Crowd-driven
Decisions are based on what others are doing, not on your goals or analysis.
Fuels bubbles
Herding pushes prices above fair value on the way up and below it on the way down.
Your own map
A personal plan is the best defence against following the crowd.
How to avoid herd mentality
- Start from your goals: Every investment should have a job in your financial plan. If you cannot say what a new investment is for, skip it.
- Be wary of crowded trades: When everyone is talking about the same stock, sector or IPO, much of the good news is usually already in the price.
- Do the homework: Understand the business, the valuation and the risks before investing, not after.
- Rebalance against the crowd: Scheduled rebalancing makes you trim what everyone is buying and add to what everyone is selling.
- Limit speculative money: If you want to try a popular idea, cap it at a small share of your portfolio that you can afford to lose.
Who is most vulnerable to herd mentality
- New investors who entered the market during a strong rally.
- Investors who rely on social media, messaging groups or tips for ideas.
- Anyone without a written plan or asset allocation to fall back on.
- Investors who check prices and news constantly, and feel pressure to act.
Frequently asked questions
What is herd mentality in the stock market?
It is when investors buy or sell mainly because many others are doing so, rather than because of their own analysis. It contributes to bubbles when prices rise and to panic selling when they fall.
What is an example of herd mentality in India?
Examples include rushing into heavily subscribed IPOs on the strength of grey market buzz, piling into a hot sector or theme after a strong rally, and the surge of retail participation in futures and options trading, where SEBI found that most individual traders lost money.
Is following the crowd always bad?
Not always. Broad, widely used approaches such as diversified long-term investing are popular for good reasons. The problem is copying others without checking whether a decision fits your own goals, time horizon and risk tolerance.