Why concentration risk can quietly hurt a portfolio
Putting a lot of money into one share that you believe in can feel smart, until something goes wrong. That danger is concentration risk. This page explains what it means, how it shows up and simple ways to reduce it.
Quick answer
Concentration risk is the risk of large losses because a big part of a portfolio is tied to one share, one sector, one asset class or one source of income. If that single item falls sharply, the whole portfolio suffers. Spreading money across different companies, sectors and assets, called diversification, is the main way to reduce it.
Key takeaways
- It comes from too much exposure to one thing.
- It can be in one share, sector, asset or employer.
- One bad event can cause a large portfolio loss.
- SEBI limits how much a mutual fund can put in one company.
- Diversification and position limits help reduce it.
What is concentration risk?
A portfolio is concentrated when a few holdings make up most of its value. If you have 60 percent of your money in one company, a 50 percent fall in that share cuts your total wealth by 30 percent, no matter how well the rest does.
It is not only about single shares. You can be concentrated in one sector, such as banking or IT, in one asset class like property, or in your employer if both your salary and savings depend on the same company.
Types of concentration risk
| Type | Example |
|---|---|
| Single stock | Most savings in one company's shares |
| Sector | Portfolio full of bank shares |
| Asset class | Almost all wealth in real estate |
| Employer | Salary, ESOPs and savings tied to one firm |
| Counterparty | Large exposure to one borrower or bank |
Banks also watch this closely. The RBI sets large exposure limits so that a bank does not lend too much to a single borrower or group, since one default could hurt the bank badly.
How do rules limit it for funds?
SEBI's mutual fund rules generally limit an equity scheme's investment in a single company to 10 percent of its net assets, with exceptions for index funds, ETFs and sectoral funds that follow their own index or theme. Debt funds also have limits on exposure to a single issuer and to a single sector.
Index providers often cap the weight of any single stock in some indices for the same reason. These rules help reduce the chance that one company's problem sinks a whole fund.
Why do investors end up concentrated?
Some people hold shares from an ESOP and never sell. Others keep adding to a share that has done well, letting it grow into a huge part of their portfolio. Overconfidence and familiarity with one company can also play a part.
A concentrated bet can lead to large gains when it works, but it also exposes you to large losses when it does not. The outcome depends heavily on one result.
How to reduce concentration risk
Set a personal limit, such as not more than a certain share of your portfolio in any one company or sector. Review your holdings regularly and rebalance when one position grows too large.
Spread money across sectors and asset classes like equity, debt and gold. Diversified mutual funds or index funds can give broad exposure with a single investment. In short, this risk is about having too many eggs in one basket.
Frequently Asked Questions
What is concentration risk?
Concentration risk is the risk of large losses when a big part of a portfolio is tied to one share, sector, asset class or income source.
What is an example of concentration risk?
Holding most of your savings in your employer's shares is a common example, since both your job and savings depend on one company.
How does SEBI limit concentration in mutual funds?
SEBI rules generally limit an equity scheme's investment in one company to 10 percent of its net assets, with exceptions for index and sectoral funds.
Is a concentrated portfolio always bad?
Not always, but it means results depend heavily on a few holdings, which can lead to large losses if they do poorly.
How can I reduce this risk?
Set limits for single holdings, rebalance regularly and spread money across companies, sectors and asset classes.
Disclaimer: Investments in the securities market are subject to market risks. Please read all related documents carefully before investing. This article is intended for informational and knowledge purposes only and should not be considered tax, financial, or investment advice. Tax laws and deductions may vary based on individual circumstances and regulatory changes. Readers are advised to consult a qualified tax advisor or financial professional before making any investment or tax planning decisions.
Indira Securities Private Limited (SEBI Reg. No.): NSE TM ID: 12866 | BSE TM ID: 663 | CDSL DPID: 17000 | SEBI Reg. No.: INZ000188930 | MCX TM ID: 56470 | NCDEX TM ID: 01277 | CDSL Reg. No.: IN-DP-90-2015 | CIN:U67120MP1996PTC085111 | RA SEBI Reg. No.: INH000023269 | IA SEBI Reg. No.: INA000021410 | SEBI Merchant Banking Reg. No.: INM000013536
