A mutual fund pools money from many investors and invests it in a portfolio of securities according to a stated mandate. You do not buy stocks one by one; you buy units of the fund at the day’s Net Asset Value (NAV). That simple structure is why mutual funds remain the default long-term vehicle for most Indian retail investors.
Confusion usually starts at the paperwork layer: AMCs, trustees, registrars, exit loads, and expense ratios. This primer maps those pieces so you can evaluate a fund the way a careful investor should—by mandate, cost, risk, and fit—not by last year’s return rank alone.
The core mechanics in plain language
- Asset Management Company (AMC): manages the portfolio within SEBI rules and the scheme’s stated objective.
- NAV: the per-unit value of the fund’s net assets after expenses, published each business day for open-ended schemes.
- Units: your ownership slice. Investing ₹10,000 at a ₹100 NAV buys 100 units (before loads/taxes).
- Expense ratio: the annual cost deducted from the fund for management and operations—paid indirectly via NAV, not as a separate invoice.
Open-ended vs close-ended vs ETFs
How common mutual fund structures differ
| Structure | Liquidity | Price discovery | Best for |
|---|---|---|---|
| Open-ended MF | Buy/sell on any business day at NAV | NAV-based | SIPs and long-term goals |
| Close-ended MF | Limited; often exchange listed | Market price can differ from NAV | Specific tenure themes |
| Index ETF | Exchange trading during market hours | Market price near NAV | Low-cost index exposure |
What to read before you invest
- Scheme Information Document (SID): mandate, risks, asset allocation band, and benchmark.
- Key Information Memorandum (KIM): the shorter summary most investors should finish first.
- Fact sheet: portfolio mix, top holdings, duration (for debt), and trailing returns—with context.
- Exit load and taxation notes: these change net outcomes more than many investors expect.
Risk is not a marketing label
SEBI riskometers are useful, but they are not a personal suitability test. An equity fund marked “Very High” can still fit a 20-year retirement SIP. A “Low to Moderate” debt fund can still lose money if interest rates spike or credit events hit. Match risk to goal horizon and capacity to stay invested.
Conclusion
Mutual funds work by professional portfolio management at a disclosed cost, with daily NAV pricing for open-ended schemes. Master NAV, expense ratio, mandate, and horizon before chasing star ratings. In 2026, the investors who win are usually the ones who understand the product—not the ones who refresh return charts every week.