Short answer: A mutual fund pools money from many investors into a single sum that is invested together across a range of assets. In return, each investor holds units, which represent a fractional ownership stake in the fund’s combined portfolio, meaning a share of everything the fund owns. A professional fund manager makes the decisions about what to buy and sell, so an investor does not need deep market knowledge to hold one.
Last reviewed: 5 November 2026
At a glance
| Term | What it means |
|---|---|
| Mutual fund | A pool of money from many investors, invested together across a range of assets |
| Unit | A fractional ownership stake in the fund’s combined portfolio |
| Asset class | A broad category of investment, such as shares or bonds |
| Fund manager | The professional who decides which assets the fund buys and sells |
| AMC (asset management company) | The company that runs mutual fund schemes, such as HDFC Mutual Fund or ICICI Prudential Mutual Fund |
The table gives the core vocabulary. The rest of this article explains how these pieces fit together.
What does a mutual fund do with your money?
Instead of each person buying shares or bonds alone, a mutual fund collects money from many people and treats it as one pool. The pool is then invested together, so a small amount from one investor joins everyone else’s money. This allows a person with a modest sum to take part in investments that would be harder to build alone.
Pooling is the basic idea behind every mutual fund. Each scheme has its own pool and its own set of holdings, so two schemes can hold very different things.
What is a unit, and what does owning one mean?
When you put money into a mutual fund, you receive units. A unit is a fractional ownership stake, which means you own a small share of the whole portfolio rather than any specific asset inside it. You do not own a particular share of a company or a particular bond when you hold a unit.
Because your units are a share of the total, the value of your holding moves with the value of the portfolio. If the combined portfolio rises, each unit is worth more. If it falls, each unit is worth less.
How does the arithmetic work?
*The following is a hypothetical example, with all figures invented for illustration only.*
Suppose ten investors each put in ₹1,000, so the pool is ₹10,000. The fund issues 1,000 units at ₹10 each. An investor who put in ₹1,000 receives 100 units, which is 10 per cent of the combined portfolio.
Now suppose the holdings rise so that the portfolio is worth ₹11,000. Each unit is then worth ₹11, and the investor’s 100 units are worth ₹1,100. If instead the portfolio falls to ₹9,000, each unit is worth ₹9, and the same 100 units are worth ₹900. The units stay the same in number; only their value changes with the portfolio.
Why do funds hold many assets at once?
A fund spreads its money across many holdings, so a single purchase can give you exposure to several asset classes. This is a main reason mutual funds are popular: a person who wants exposure to more than one kind of asset does not need to buy each one separately.
Spreading money does not remove the risk of loss. It means that a fall in one holding is one part of the whole, not the entire outcome. The portfolio can still lose value when many of its holdings fall together.
Who decides what the fund buys and sells?
A professional fund manager makes the decisions about which assets the fund buys and sells. As an investor, you do not choose individual holdings for the fund, and you do not need to track the market to hold units.
This is useful for someone without time or training to research markets. The catch is that you depend on the manager’s decisions, and you cannot change the fund’s holdings yourself. Two funds with different managers can perform differently even when they cover similar kinds of assets.
Who runs the company behind a fund?
An asset management company, or AMC, is the company that runs mutual fund schemes. HDFC Mutual Fund and ICICI Prudential Mutual Fund are examples of AMCs operating in India. When you read about a scheme, the AMC behind it is the organisation responsible for running it.
Knowing the AMC helps you find the scheme’s documents and track record. It does not change how the units work: the value still depends on the portfolio.
What are the catches?
Mutual funds are not a guarantee. The value of your units can fall, and the worked example above shows how a fall in the portfolio from ₹10,000 to ₹9,000 cuts the value of 100 units from ₹1,000 to ₹900.
Diversification, meaning spreading across many holdings, reduces the effect of any single holding but does not remove the chance of loss. Relying on a manager’s decisions also means that a poor decision affects your units directly.
Before deciding anything about your own money, read the scheme’s documents and understand what it holds. This article describes how funds work; it does not say whether any particular fund suits you.
Frequently asked questions
Do I need to understand the stock market to invest in a mutual fund?
No deep market knowledge is needed, because a professional fund manager makes the decisions about which assets the fund buys and sells. You still need to understand that the value of your units moves with the portfolio.
Who runs a mutual fund?
A mutual fund scheme is run by an asset management company, or AMC. Examples in India include HDFC Mutual Fund and ICICI Prudential Mutual Fund.
What do I actually own when I invest in a mutual fund?
You hold units, which represent a fractional ownership stake in the fund’s combined portfolio. You do not own a specific asset inside the fund on your own.
Sources and last check
Facts in this article were checked against the sources below on 5 November 2026. Rules and figures can change; check the primary source before acting.
- upstox.com (broker education)
- zerodha.com (broker education)
- dhan.co (broker education)
- groww.in (broker education)
This article is general information, not investment advice. MyFinanceBandhu is not a SEBI-registered investment adviser.
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