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Behavioural Biases in Investing

Most investing mistakes are not caused by a lack of information. They are caused by how our minds work. We fear losses more than we enjoy gains. We follow the crowd. We assume what happened recently will keep happening. We feel more confident than we should after a few good results. Researchers call these patterns behavioural biases, and the study of them is called behavioural finance. Everyone has them, including professionals. Understanding behavioural biases in investing will not make them disappear, but it helps you notice them and build simple rules that protect you from yourself. This page explains the most common ones in plain words. Myfolios is an AMFI-registered mutual fund distributor (ARN-145870) working from Indore since 2014.

Key takeaways
  • Behavioural biases are mental shortcuts that lead to poor money decisions.
  • Common ones: loss aversion, herd behaviour, recency bias, overconfidence and anchoring.
  • They cause people to buy high, sell low and switch funds too often.
  • Automation, written plans and fewer checks help beat them.

Why biases exist

Our brains evolved to make quick decisions in a dangerous world, not to manage long-term investments. Shortcuts that helped our ancestors survive, like running when others run, often work against us in markets.

Loss aversion

Research suggests that the pain of losing money feels much stronger than the pleasure of gaining the same amount. This makes investors sell in panic during falls, or avoid equity altogether, even when their goals are many years away.

How to beat it: remember that falls are normal, and focus on your long-term goal, not the daily value.

Herd behaviour

When everyone around you is buying a hot fund or sector, it feels safe to join. When everyone is selling, it feels dangerous to stay. Following the crowd often means buying near peaks and selling near bottoms.

How to beat it: decide your plan in calm times and stick to it when the crowd is excited or scared.

Recency bias

We give too much weight to what happened recently. A fund that did well last year looks like it will always do well. A market that fell last month feels like it will keep falling.

How to beat it: look at long periods and rolling returns, not just the latest year.

Our page on rolling returns explains this better way to look at history.

Overconfidence

After a few good decisions, many investors believe they can predict markets or pick winners. They trade more, concentrate their money and take bigger risks. Overconfidence usually ends with a painful lesson.

How to beat it: diversify, keep records of your predictions, and notice how often they are wrong.

Anchoring

We fix on a number and judge everything against it. "I will sell when it gets back to what I paid." "The Nifty was higher last year, so it is cheap now." The price you paid means nothing to the market.

How to beat it: make decisions based on your goals and the fund quality, not on past prices.

Confirmation bias

Once we believe something, we look for information that supports it and ignore what contradicts it. An investor who loves a sector reads only positive news about it.

How to beat it: actively look for the opposite view before making a big decision.

Mental accounting

We treat money differently depending on where it came from. A bonus feels like "free money" and gets spent, while salary is treated carefully. Some people keep savings in a low-earning account while carrying costly credit card debt.

How to beat it: treat every rupee the same and give each a clear purpose.

Our page on sinking funds shows how to give money a job.

Fear of missing out

Seeing friends talk about big gains in a new fund, IPO or sector creates pressure to join before it is "too late". Decisions made from FOMO are rarely well thought through.

How to beat it: ask whether the investment fits your plan, not whether others are making money.

Our post on why your friend fund did better explains this.

Disposition effect

Investors tend to sell winners too early to lock in gains and hold losers too long hoping they will recover. This can leave a portfolio full of weak holdings.

How to beat it: review every holding on its merits, regardless of whether it is currently up or down.

Home bias and familiarity

People prefer what they know: companies they buy from, their employer shares, or their own city property. Familiarity feels safe but can lead to concentration.

Our page on diversification explains why spreading money matters.

Status quo bias

Sometimes we do nothing because change feels hard: old investments never reviewed, SIPs never raised, money left idle in a savings account for years. Inaction is also a decision.

Our post on the yearly money checklist helps beat this.

How biases show up in SIP investing

  • Stopping SIPs during a fall (loss aversion).
  • Starting SIPs only after markets have risen a lot (herd and recency).
  • Switching funds every year to last year top performer (recency).
  • Never raising the SIP amount (status quo).

Our page on common mutual fund mistakes lists more.

Simple rules that help

  1. Write down your goals and asset mix.
  2. Automate SIPs so you do not decide every month.
  3. Check your portfolio less often, perhaps quarterly.
  4. Review once a year, on a fixed date.
  5. Wait a few days before any big decision.

Why a second opinion helps

It is much easier to see biases in others than in ourselves. Talking to someone calm and independent before making a big change can stop an emotional decision. Many investors value having someone to talk to during market falls more than anything else.

Our page on risk tolerance explains how to match investments to your temperament.

Keep an investing diary

Before every big money decision, write down what you are doing, why, and what you expect to happen. Look back at these notes a year later. Many investors are surprised to see how often emotion, not logic, drove their choices. The diary makes your own biases visible, which is the first step to managing them.

Biases in families

Families often follow money habits passed down from parents: only gold, only property, only deposits. These habits feel safe because they are familiar. Respect them, but question whether they still fit today goals. Even the way gold is bought has changed; our page on digital gold versus gold ETFs explains the newer options.

Our post on your parents FD habit explores this gently.

The short version

  • Everyone has biases.
  • Common ones: loss aversion, herd, recency, overconfidence.
  • They lead to buying high and selling low.
  • Automation and rules protect you.

We are distributors rather than investment advisers and we recommend no schemes. If you want a calm voice before your next big money decision, get in touch.

Frequently Asked Questions

Mental shortcuts and emotions that lead investors to make poor decisions, like panic selling or chasing past winners.

The tendency to feel losses more strongly than equal gains, which can cause panic selling.

Following what others are doing, which often means buying near peaks and selling near bottoms.

Write a plan, automate SIPs, check your portfolio less often and wait before big decisions.

Yes. Everyone has them; professionals often use rules and processes to limit their effect.

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