Quick Summary
- Mutual fund terms fall into four buckets: fund structure, performance & risk, cost, and tax/lock-in — once you know the bucket, the term is easier to remember
- NAV is just the per-unit price of a fund, recalculated once a day; it is not a measure of whether a fund is 'cheap' or 'expensive'
- Direct plans skip distributor commission and typically earn 0.5-1% more a year than regular plans over the long run, purely because of the lower expense ratio
- CAGR assumes a single lump sum with no interim cash flows, while XIRR is the correct measure once you have multiple SIP instalments going in
- A higher Sharpe ratio means better risk-adjusted returns, not just higher returns, and alpha/beta tell you how a fund behaves relative to its benchmark
- SEBI mandates a colour-coded risk-o-meter on every scheme's factsheet, from 'Low' to 'Very High', and it must be reviewed monthly
A plain-language glossary of the 20 mutual fund terms you'll actually run into on your investment app or statement — from NAV and expense ratio to alpha, beta, and rolling returns.
Open any mutual fund app or factsheet and you'll run into a wall of acronyms — NAV, AUM, TER, XIRR, SID — thrown around as if everyone already knows what they mean. Most investors nod along and move on. That's a mistake, because several of these terms directly affect how much money you actually keep.
This glossary groups 20 commonly used mutual fund terms into four practical buckets: how a fund is structured, how its performance and risk are measured, what it costs you, and what locks your money in or affects its taxation. Each one comes with a plain-language definition and a one-line example.
Fund structure terms
These describe what a mutual fund is and the different ways you can invest in one.
| Term | Meaning |
|---|---|
| AMC (Asset Management Company) | The company that actually runs the mutual fund — pools investor money, hires fund managers, and buys/sells securities. HDFC AMC and SBI Mutual Fund are examples of AMCs; the "fund" is a scheme they launch, not the company itself. |
| NAV (Net Asset Value) | The per-unit price of a scheme, calculated once a day after market close as (total assets - liabilities) / number of units outstanding. A fund with NAV ₹50 isn't "cheaper" than one with NAV ₹500 — only the percentage growth matters. |
| AUM (Assets Under Management) | The total market value of all investments a fund (or AMC) currently manages. A scheme with ₹50,000 crore AUM is simply larger than one with ₹500 crore; size alone doesn't indicate quality, though very large small-cap funds can struggle to deploy cash efficiently. |
| SID (Scheme Information Document) | The fund's official legal document — covers investment objective, asset allocation, risks, expense ratio, exit load, and fund manager details. It's the one document worth skimming before you invest, even if you only read the "investment objective" and "risk factors" sections. |
| Direct vs Regular Plan | Every scheme is sold in two versions. A Direct plan is bought straight from the AMC with no distributor involved, so it carries a lower expense ratio. A Regular plan is bought through a distributor/advisor who earns a trail commission, built into a slightly higher expense ratio — often 0.5-1% a year more. |
| Lump Sum | Investing a large amount in one go, as opposed to spreading it over time. Best used when you have a windfall (bonus, maturity proceeds) and are comfortable with the market's current valuation. |
| SIP (Systematic Investment Plan) | A fixed amount auto-debited at regular intervals (usually monthly) and invested in a chosen scheme. A ₹5,000 monthly SIP buys more units when the NAV is low and fewer when it's high, averaging out your purchase cost over time. |
| STP (Systematic Transfer Plan) | An automated, periodic transfer of a fixed amount from one scheme to another, usually from a debt fund into an equity fund, to stagger a lump sum investment instead of deploying it all at once. |
| SWP (Systematic Withdrawal Plan) | The reverse of a SIP — a fixed amount is automatically redeemed from your fund at regular intervals, commonly used by retirees to generate a predictable "income" from an accumulated corpus. |
| FoF (Fund of Funds) | A scheme that invests in units of other mutual funds rather than directly in stocks or bonds. International FoFs, for instance, let Indian investors access US or global equity funds through a single rupee-denominated scheme. |
Performance and risk terms
These tell you how a fund has performed and how much risk it took to get there.
| Term | Meaning |
|---|---|
| Benchmark | The index (e.g., Nifty 50, BSE 500) a fund measures itself against. A large-cap fund benchmarked to the Nifty 50 should ideally be compared only to the Nifty 50's returns, not to a small-cap fund's. |
| CAGR (Compound Annual Growth Rate) | The annualised return of a single lump-sum investment over a period, smoothing out year-to-year volatility into one average yearly figure. If ₹1 lakh grew to ₹2 lakh in 5 years, the CAGR is about 14.9%. |
| XIRR (Extended Internal Rate of Return) | The correct way to measure returns when money went in (or came out) on multiple dates — exactly what happens with SIPs. Unlike CAGR, XIRR accounts for the timing and size of each individual instalment. |
| Alpha | The extra return (or shortfall) a fund generated compared to its benchmark, after adjusting for risk. A fund with alpha of +2% beat its benchmark by 2 percentage points on a risk-adjusted basis; negative alpha means it underperformed. |
| Beta | A measure of how volatile a fund is relative to its benchmark. Beta of 1 means it moves in line with the market; beta of 1.2 means it tends to be 20% more volatile — bigger swings in both directions. |
| Sharpe Ratio | Return earned per unit of risk taken, calculated as (fund's return - risk-free rate) / standard deviation. Between two funds with similar returns, the one with the higher Sharpe ratio delivered those returns with less volatility. |
| Risk-o-meter | A SEBI-mandated, colour-coded visual on every scheme's factsheet rating it from "Low" to "Very High" risk, based on parameters like volatility, credit quality, and liquidity. AMCs must review and disclose it monthly, so it's a quick, standardised first check before you read anything else. |
| Rolling Returns | Returns calculated for a fixed holding period (say, 3 years) but measured repeatedly across overlapping start dates, rather than one fixed-to-fixed date range. Rolling returns give a much more honest picture of consistency than a single "5-year return" number that can be flattered or hurt by its specific start and end dates. |
Continue Exploring
Cost terms
What a fund actually costs you — directly and indirectly.
| Term | Meaning |
|---|---|
| Expense Ratio / TER (Total Expense Ratio) | The annual fee, expressed as a percentage of AUM, that a fund deducts to cover fund management, admin, and distribution costs. SEBI caps TER on a sliding scale that falls as a scheme's AUM grows, and Direct plans always carry a lower TER than Regular plans of the same scheme. A 1% difference in TER sustained over 20 years can shave a meaningfully large chunk off your final corpus. |
| Exit Load | A fee charged if you redeem units before a specified holding period, meant to discourage short-term in-and-out trading. A common structure is "1% if redeemed within 1 year, nil after" — check this in the SID before investing if you might need the money soon. |
Tax and lock-in terms
| Term | Meaning |
|---|---|
| Lock-in Period | A mandatory minimum holding period during which units cannot be redeemed at all, not even with a penalty. ELSS (tax-saving) funds carry a 3-year statutory lock-in under Section 80C — the shortest lock-in among all 80C options, which is a large part of their appeal. |
Putting it together
You don't need to memorise all 20 terms before your first SIP. But a few are worth internalising early: check the risk-o-meter and expense ratio before you invest, pick Direct over Regular if you're comfortable doing your own research, use XIRR (not CAGR) once you're running a SIP, and always check the exit load and lock-in before you assume your money is freely accessible. The rest of the vocabulary will make more sense once you're actually tracking a live investment and start asking "why did my returns show this number?"
Frequently Asked Questions
What is the difference between NAV and the price of a stock?
A stock's price moves continuously during market hours based on buy/sell orders. A mutual fund's NAV (Net Asset Value) is calculated only once a day, after markets close, by dividing the fund's total asset value (minus liabilities) by the number of outstanding units. You can't buy or sell at an 'intraday NAV' the way you can with a stock.
Does a lower NAV mean a mutual fund is cheaper or a better buy?
No. NAV is just a per-unit price and has no bearing on future returns. A fund with NAV ₹20 and one with NAV ₹200 can deliver identical percentage returns going forward. What matters is the fund's underlying portfolio, expense ratio, and consistency of performance, not the NAV number.
Should I always choose the Direct plan over Regular?
If you're comfortable researching and selecting funds yourself (or using a fee-only advisor), Direct plans let you keep the 0.5-1% a year that would otherwise go to a distributor as commission, embedded in a Regular plan's higher expense ratio. Over a 15-20 year SIP, that difference compounds into a meaningful gap in final corpus. Regular plans make sense if you specifically want ongoing hand-holding from a distributor who gets paid through that commission.
What is a good Sharpe ratio for a mutual fund?
There's no single universal cutoff, but among funds in the same category, a higher Sharpe ratio is better because it shows more return earned per unit of risk (volatility) taken. Use it to compare funds within the same category (e.g., two large-cap funds) rather than across very different categories like debt vs. small-cap equity, where risk levels aren't comparable.
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