Why sensible people make poor investment decisions
The gap between what investments return and what investors actually earn is caused almost entirely by behaviour. This lesson is about that gap, and about building systems rather than relying on willpower.
Last checked August 2026.
The short version
- A loss feels roughly twice as strong as an equal gain. That single fact explains most bad decisions.
- You will hold losers too long and sell winners too early. Everyone does.
- Your memory quietly rewrites your reasons to match how you currently feel.
- Confidence rises with the amount of information, long after accuracy has stopped improving.
- Systems beat willpower. Automate the decision so it does not need to be made when you are frightened.
The gap between returns and results
A fund can return a perfectly respectable amount over a decade while the average person who held it earns considerably less. The fund did not change. The behaviour did.
The pattern is consistent and unglamorous. People buy after a period of strong performance, when the story is compelling and the price is high. They sell after a fall, when the news is frightening and the price is low. Repeat that a few times and the arithmetic does the rest.
This matters because it locates the problem accurately. Most beginners assume their results depend on picking better investments. For the great majority, the larger gap is between the investment return and what they personally captured from it.
Loss aversion, the root of most of it
Losing ₹10,000 feels roughly twice as bad as gaining ₹10,000 feels good. This is well documented and it is not a flaw you can reason your way out of. It is how humans are built.
It produces two specific behaviours that quietly damage portfolios.
Holding losers too long. While you have not sold, the loss is not real to you. Selling makes it real, and admits an error. So people hold falling positions waiting to get back to their purchase price, which the market has no knowledge of and no obligation to respect.
Selling winners too early. A gain feels fragile. Locking it in feels like taking something safely off the table. So people sell what is working and keep what is not, ending up with a portfolio composed largely of their mistakes.
The other patterns worth naming
Anchoring
You bought at ₹500 and the price is ₹380. That ₹500 becomes a reference point that shapes every subsequent thought. But ₹500 was one price, on one day, and the business has since changed or it has not. The relevant question is what it is worth now.
It also appears as: "it was ₹900 last year, so ₹600 is cheap." Not necessarily. It might have been overpriced at ₹900 and fairly priced at ₹600.
Recency bias
Whatever has happened lately feels like what will keep happening. After three good years, risk feels theoretical and people increase equity exposure. After a crash, recovery feels impossible and they reduce it. Both moves are made at exactly the wrong time, and both feel entirely reasonable in the moment.
Confirmation bias
Once you own something, you read news about it differently. Supportive articles feel insightful and critical ones feel poorly informed. The most useful counter is to write down, before buying, what evidence would change your mind, and to seek out the strongest argument against your position specifically.
Overconfidence
Confidence keeps rising with the amount of information you gather, long after accuracy has stopped improving. Reading twenty articles about a company makes you feel far more certain than reading five, without making you meaningfully more correct. This is why people who trade most actively tend to do worst.
Herd behaviour
Watching others make money on something you avoided is genuinely painful, and it drives more late buying than any analysis does. Every bubble is powered by people who were right to be cautious and could not bear to keep being cautious while everyone around them profited.
Patterns particular to Indian investors
- Tip culture. A name arrives via a group with no reasoning attached. It cannot be evaluated, so it cannot be learned from, and when it falls you have no basis for deciding anything.
- Confusing activity with skill. SEBI found only about 10% of intraday traders also ran a mutual fund . Frequent trading feels like taking your finances seriously and is usually the opposite.
- Finfluencer certainty. Confidence is entertaining and correlates poorly with accuracy. Someone certain about next quarter is telling you about their personality, not the market.
- Judging by the friend who won. You hear about the trade that worked. You do not hear about the four that did not, from the same person or from anyone else. This is survivorship bias and it distorts what feels normal.
- Treating gold and property as riskless. Familiarity is not safety. Both can fall and both can stay flat for a decade.
Systems beat willpower
Knowing about a bias does not remove it. You will read this lesson, agree with all of it, and still feel the urge to sell during the next fall. The answer is not to try harder. It is to arrange things so fewer decisions are required when you are least able to make them.
- Automate the investing. A on a fixed date removes a monthly decision entirely, and removes it most usefully in the months you would have skipped.
- Write down the reason at purchase. Why, the evidence, the risks, and what would change it. Memory rewrites itself. Written notes do not.
- Decide the exit condition before you buy. In business terms for investments, in price terms for trades.
- Look less often. Checking daily gives you three hundred opportunities a year to feel something and act on it. Checking quarterly gives you four.
- on a schedule, not a feeling. Once a year, mechanically. It forces buying what fell.
- Keep a decision journal. Record what you did and why, then read it a year later. Nothing corrects overconfidence like your own reasoning in your own words.
- Cap position sizes in advance. So no single mistake can be catastrophic no matter how convinced you were.
Every item on that list has the same shape: a decision made calmly, in advance, that removes the need for judgement under pressure. That is what the written reason in AlphaVik is for. Months later, when the price has moved and you feel something about it, that note is the only reliable way to tell whether the business changed or only the price did.
What to remember
- Most of the gap between investment returns and investor results is caused by behaviour.
- A loss feels about twice as strong as an equal gain, which makes people hold losers and sell winners.
- Your purchase price is a fact about your past, not information about the investment.
- Confidence keeps rising with more information long after accuracy stops improving.
- Knowing about a bias does not remove it. Systems decided in advance do the work.
- Write the reason down at purchase. Memory quietly rewrites itself to match current feelings.