Retail Investing · Risk, Allocation & Hygiene
Behavioural Biases
FOMO, loss aversion, overconfidence and herd behaviour — and process antidotes.
5 concepts. Foundation literacy for retail investors.
- Retail Investing
- Easy level
- 5 concepts
- 5 practice questions
1FOMO
Fear of missing out pushes buys at peaks after stories go viral.
Antidote: pre-commit allocation and SIP; ban impulse app buys.
Figure. The story goes viral only after the move has happened, so the FOMO buy lands at the loudest point - the top. The pre-committed plan exists for exactly this moment.
| Item | Fact |
|---|---|
| FOMO | Chase after the story |
| Antidote | Pre-commit plan |
| Tool | Cooling-off rule |
Buying only because prices already exploded and chats are euphoric is
- FOMO-driven behaviour
- Pure indexing
- Risk-free arbitrage
FOMO.
2Loss aversion
Losses hurt more than equivalent gains please, so people hold losers too long and sell winners too early.
Antidote: review rules based on thesis break, not on pain.
Figure. The same Rs 1,000 weighs roughly twice as heavy as a loss than as a gain. That asymmetry - not analysis - is what keeps broken theses unsold and sells winners early. Bars show relative felt intensity, not rupees.
| Item | Fact |
|---|---|
| Pain | Losses loom large |
| Mistake | Hold broken theses |
| Antidote | Thesis checklist |
Holding a stock only because selling would "make the loss real" is
- Loss-aversion behaviour
- Fundamental analysis
- SEBI policy
Paper vs real is psychological.
3Overconfidence
A few lucky wins create the illusion of skill. Track record with honesty, including missed risks.
Antidote: journals and base rates.
Figure. Memory files the three wins and quietly drops the seven losses, so the track record feels like skill. A written journal restores the base rate - which is why it is the antidote.
| Item | Fact |
|---|---|
| Symptom | My tips always work |
| Reality | Luck exists |
| Antidote | Write theses; review outcomes |
After three lucky wins, overconfidence often leads to
- Larger unearned bets
- Automatic diversification
- Lower risk
Luck ≠ skill.
4Herding
Crowds feel safe until they reverse together. Herding turns diversification into a single crowded trade.
Antidote: independent checklist before joining a narrative.
Figure. The crowd feels safe on the way in because everyone agrees - and reverses together for the same reason. Many holders of one narrative are one trade wearing many names.
| Item | Fact |
|---|---|
| Herd | Safety in numbers feeling |
| Risk | Crowded exit |
| Antidote | Independent checklist |
Buying only because "everyone is buying" is
- Herding
- Margin of safety analysis
- Liability matching
Herding.
5Process antidotes
Written allocation, SIPs, checklists, and scheduled reviews beat vibe-based trading.
Automation is a behavioural tool.
Figure. The antidote to every bias on this page is the same loop: write the plan, let automation execute it, review on a calendar, and adjust only when life - not the market's mood - changes.
| Item | Fact |
|---|---|
| Write | Policy |
| Automate | SIP |
| Review | Calendar, not adrenaline |
The most reliable behavioural tool in this course is
- A written plan you automate and review
- Hot tips at midnight
- GMP screenshots
Write and automate.
Notes
- Fear of missing out pushes buys at peaks after stories go viral.
- Losses hurt more than equivalent gains please, so people hold losers too long and sell winners too early.
- A few lucky wins create the illusion of skill. Track record with honesty, including missed risks.
- Crowds feel safe until they reverse together. Herding turns diversification into a single crowded trade.
- Written allocation, SIPs, checklists, and scheduled reviews beat vibe-based trading.
Formulas
- Chase after the story
- Losses loom large
- My tips always work
Exam traps & shortcuts
- Revise the table pegs before any quiz.
Reference tables
| Peg | Fact |
|---|---|
| 1.FOMO | Chase after the story |
| 2.Loss | Losses loom large |
| 3.Overconfidence | My tips always work |
| 4.Herding | Safety in numbers feeling |
| 5.Process | Policy |
Recap
Keep these pegs.
- 1.FOMO
- Chase after the story
- 2.Loss
- Losses loom large
- 3.Overconfidence
- My tips always work
- 4.Herding
- Safety in numbers feeling
- 5.Process
- Policy
Practise Behavioural Biases
Reading is free and needs no account. Practice, mocks and progress live in the app.
- 5 exam-style questions on this topic, with explanations
- A 5-question practice set that ends the chapter
- Timed mocks scored with the real marking scheme
- Readiness tracked per topic, kept on your device