A mutual fund is a shared pot. Thousands of people put money in, a professional manager buys shares or bonds with the pooled money, and everyone owns a slice of whatever the pot holds.
You do not own the shares. You own units of the pot. Understand that one sentence and most of the confusion disappears.
Almost everyone starting out has been told to "start a SIP" long before anyone explained what they would actually be buying. So let us do it in the right order.
The shared pot
Imagine forty neighbours who each want to own a shop in the market, but nobody can afford a whole shop alone. So they pool their money, buy six shops between them, and appoint one person to collect the rent and handle the tenants. Each neighbour owns a share of all six shops rather than one shop outright.
A mutual fund is that arrangement, at scale, for shares and bonds. The fund house pools money from thousands of investors, a fund manager decides what to buy, and every investor owns a proportional slice of everything the fund holds.
This solves three problems at once. You get diversification you could never afford alone — a ₹500 investment can be spread across fifty companies. You get professional management instead of picking shares yourself. And you get liquidity: you can usually take your money out in a couple of working days.
What you actually own: units and NAV
When you put money in, you are issued units. The price of one unit is the NAV — net asset value — which is simply everything the fund owns, minus what it owes, divided by the number of units in existence.
It is recalculated at the end of every working day. If the shares the fund holds went up today, the NAV is higher this evening. Nothing else changed — you still hold the same number of units.
A ₹10 NAV is not "cheaper" than a ₹500 NAV
This is the single most common misunderstanding in India, and new fund offers are often marketed to exploit it.
If you invest ₹10,000 in a fund with a NAV of ₹10, you get 1,000 units. In a fund with a NAV of ₹500, you get 20 units. If both funds rise 10%, both your holdings become ₹11,000. The number of units is irrelevant — only the percentage change matters.
A low NAV does not mean the fund is cheap or has room to grow. It usually just means the fund is newer.
A worked example
Say you start a ₹5,000 monthly investment. The NAV moves around, as it always does.
| Month | NAV | Invested | Units bought |
|---|---|---|---|
| Month 1 | ₹50.00 | ₹5,000 | 100.00 |
| Month 2 — market falls | ₹40.00 | ₹5,000 | 125.00 |
| Month 3 — market recovers | ₹62.50 | ₹5,000 | 80.00 |
| Total | — | ₹15,000 | 305.00 |
Look at month 2. The market fell, and that felt bad — but your ₹5,000 bought 125 units instead of 100. The fall worked in your favour, because you were still buying.
Your average cost works out to ₹49.18 a unit, while the average NAV across those three months was ₹50.83. Investing a fixed rupee amount each month means you automatically buy more units when prices are low and fewer when they are high. Nobody predicted anything. The arithmetic did it for you.
At the month-3 NAV of ₹62.50, your 305 units are worth ₹19,062 — against ₹15,000 invested.
A SIP is not a product
People say "I have invested in a SIP" the way they might say "I have a fixed deposit". But a systematic investment plan is not a thing you own. It is just a standing instruction — an arrangement to buy a fixed rupee amount of a chosen fund on a chosen date every month.
The investment is the fund. The SIP is only the method of getting money into it. You can invest the same money as a lump sum, and it would be the same fund.
The fee that costs lakhs
Running a fund costs money, and that cost is charged as the expense ratio — an annual percentage of your holding, deducted quietly from the NAV. You will never see it as a line item. It has already been taken before the NAV is published.
Now the part that matters. Every fund is sold in two versions:
- Regular plan — includes a commission paid to whoever sold it to you, built into the expense ratio, every year, for as long as you hold it.
- Direct plan — the identical fund, same manager, same portfolio, bought straight from the fund house. No commission, so a lower expense ratio.
The difference is commonly somewhere between half a percent and one percent a year. That sounds trivial. Over an investing lifetime it is not.
| Total you invest | ₹12,00,000 |
| Regular plan, ends at | ₹43,67,865 |
| Direct plan, ends at | ₹49,95,740 |
| Difference | ₹6,27,875 |
Returns are assumed for illustration, not predicted. What is being illustrated is the effect of the cost difference, not the return itself.
That gap is more than half of everything you put in, lost to a fee difference of one percent a year on an otherwise identical investment. If you take one practical thing from this session, take this: check whether your plan says Direct or Regular.
What a mutual fund is not
It is not a guaranteed return. Equity funds fall — sometimes 30% or more in a bad year, and there is no floor under them.
It is not a single thing, either. An equity fund owns shares and swings hard. A debt fund owns bonds and moves gently. A hybrid fund owns some of both. Calling all of them "mutual funds" is like calling both a scooter and a lorry "vehicles" — true, but not useful for deciding what to drive.
And it is not unregulated. Mutual funds in India are regulated by SEBI, and the securities the fund buys are held by an independent custodian rather than by the fund house itself. That structure exists precisely so that a fund house cannot simply walk away with investors' money. The value of your units can fall, but that is market risk, which is a different thing altogether from the money disappearing.
The common mistake
Choosing a fund by looking at last year's returns. The best-performing fund of any given year is very often an ordinary performer over ten, and past returns are the weakest available guide to future ones — which is exactly why every advertisement is legally required to say so.
The second mistake is stopping the monthly investment when markets fall. Look again at month 2 in the table above: that was the month your money bought the most units. Stopping then is precisely backwards, and it is what most first-time investors do.
Jargon buster
- NAV
- Net asset value. The price of one unit, recalculated at the end of every working day.
- Units
- What you actually own. Your slice of the shared pot.
- Expense ratio
- The annual cost of running the fund, charged as a percentage and already deducted before the NAV you see.
- Direct plan
- The same fund bought without a distributor's commission, so a lower expense ratio.
- SIP
- Systematic investment plan. A standing instruction to invest a fixed amount on a fixed date — a method, not a product.
- AMC
- Asset management company. The fund house that runs the fund.
- Equity, debt, hybrid
- What the fund holds: shares, bonds, or a mix of the two.