Why We Do Stupid Things With Money - Intro to Behavioral Finance

In traditional finance textbooks, there is a fictional character known as Homo Economicus (Economic Man). This person is perfectly rational. They calculate probabilities instantly, never get emotional, and always make the decision that maximizes their wealth.

In the real world, Homo Economicus does not exist. Instead, there is you, me, and your uncle who bought a penny stock because his astrologer told him to.

Behavioral Finance is the study of why smart people make irrational money decisions. It combines psychology with economics to explain why we panic when the market crashes and get greedy when it hits an all-time high. As an investor, your biggest enemy isn’t the market, the government, or inflation—it is the mirror.

The Two Systems of Thinking

Psychologist Daniel Kahneman (a Nobel winner) explains that our brains have two modes:

• System 1 (Fast): Emotional, instinctive, and automatic. (e.g., running from a snake, buying a stock because it’s "green" today).
• System 2 (Slow): Logical, calculating, and deliberate. (e.g., solving a math problem, reading a balance sheet).

Investing requires System 2, but money triggers fear and greed, which activates System 1. This leads to "Cognitive Biases"—mental shortcuts that trip us up.

Let’s look at the most common biases in the Indian context.

1. Herd Mentality (FOMO)

This is the "Bhed Chaal" of investing. Humans are wired to fit in. If everyone around you is doing something, your brain assumes it must be safe.

• The Scenario: You see your friends posting screenshots of profits from a new "hot" IPO or a crypto coin on Instagram. Everyone is talking about it.
• The Mistake: You buy in at the peak because you have FOMO (Fear Of Missing Out). Usually, by the time the general public (the herd) rushes in, the smart money is already exiting.
• Indian Example: The craze for certain IPOs (like Paytm or Zomato) where people applied just because subscription numbers were high, without looking at the valuation.

2. Loss Aversion

Scientific studies show that the pain of losing ₹1,000 is psychologically twice as intense as the joy of gaining ₹1,000.

• The Scenario: You bought a stock at ₹100. It falls to ₹70.
• The Mistake: A rational person would ask: "Is this stock worth keeping today?" If not, they sell. But because of Loss Aversion, you hold on, hoping it bounces back to ₹100 so you can sell at "No Profit, No Loss." You refuse to book the loss, often riding it all the way down to zero.
• The Lesson: The market doesn’t care what price you bought it at. A loss is a loss, whether you book it or not.

3. Recency Bias

We tend to give too much importance to recent events and ignore long-term history.

• The Scenario: The market has been going up for the last 6 months.
• The Mistake: You assume it will always go up. You take risky loans to invest. Conversely, if the market has been down for 6 months, you assume it will go to zero and you stop your SIPs.
• Indian Example: During the 2020-21 bull run, many new investors assumed 50% yearly returns were "normal." When the market corrected in 2022, they were shocked.

4. Confirmation Bias

We love being right. We seek out information that confirms what we already believe and ignore information that contradicts it.

• The Scenario: You love "Company X" (maybe because you own a bike from them).
• The Mistake: You only read positive news articles about the company. If a report comes out saying the company has bad debt, you dismiss it as "fake news" or "manipulation." You are looking for validation, not truth.

5. The Endowment Effect

We value things more simply because we own them.

• The Scenario: You try to sell a used textbook or a gadget on OLX.
• The Mistake: You price it way higher than the market rate because you own it, and you have memories attached to it. In stocks, investors often "fall in love" with their shares and refuse to sell even when the company fundamentals rot.

The "Overconfidence" Trap (Dunning-Kruger Effect)

This is especially dangerous for students and young professionals.

• The Setup: You read a few chapters of this book, watch two YouTube videos, and make a lucky profit on your first trade.
• The Trap: You begin to believe you have a special skill. You think you can outsmart the institutional investors (FIIs and DIIs) who have supercomputers and PhD teams.
• The Reality: 9 out of 10 individual traders in the F&O (Futures and Options) segment in India incur losses. Overconfidence is the fastest way to go broke.

How to "Hack" Your Brain

You cannot delete these emotions; they are part of your biology. But you can build systems to bypass them.

1. Automate Everything (SIPs): If money leaves your bank account automatically on the 5th of every month, you don't have to make a decision. No decision = No emotion.
2. Stop Checking Your Portfolio: Checking your app daily is like checking the oven every 2 minutes while baking a cake. It won't cook faster, and you might ruin it. Check once a quarter.
3. Write Down Your Logic: Before buying a stock, write down why you are buying it and under what conditions you will sell it. If things go wrong, read your own note. This forces System 2 thinking.

Summary

Investing is 10% IQ and 90% Temperament. You can be the smartest math topper in your batch, but if you panic-sell when the Sensex drops 2,000 points, you will lose to the average student who simply held on. Master your mind, and the money will follow.