Mutual Funds for Beginners: NAV, SIP, Expense Ratio, AUM Explained

The use of mutual funds is a popular method for new investors to get involved in investing, but at first glance, the terminology used can appear as a complete mystery. Some of the terms that you may come across when looking at various mutual funds include: NAV (net asset value), SIP (systematic investment plan), expense ratio, and AUM (assets under management). You may not know what these terms mean or how they affect you.

This guide will provide you with an overview of the basic terminology in simple language. You will understand mutual funds, how they work, and what you should know about the four most common terms associated with mutual funds. This will help you feel more confident about reading mutual fund tables and making informed decisions.

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What Is a Mutual Fund?

A mutual fund pulls money from several individuals and invests it into many different types of investments based on the mutual fund's investment objectives. Usually, the investments of a mutual fund include:

  • Stocks (equity funds)
  • Bonds and money market instruments (debt funds)
  • A mix of both (hybrid funds)

A mutual fund manager (or a group of managers) manages the investments of the mutual fund based on the specific investment objectives stated in the mutual fund prospectus (i.e., large-cap equity vs. short-term debt).

When you invest in a mutual fund, you purchase units of the mutual fund. Your investment value will change depending on the performance of the underlying investments in the mutual fund.

Why People Use Mutual Funds

Mutual Funds Are Attractive Because of Their Ability to:

  • Diversification: Your Money is Spread out Over Multiple Holdings, So You are Less Impacted by the Loss of One Poorly Performing Stock or Bond.
  • Professional management: A Professional Fund Staff Manages the Investment Portfolio of the Mutual Fund.
  • Flexible investment options: You Can Invest Either a Lump Sum Investment or an Amount Each Month Using SIP (Systematic Investment Plan)
  • Access: You Can Begin Investing for Less Than One Monthly Salary (Depending on the Fund/Platform)..

Still, There Are Risks Associated with Mutual Funds, They Do Not Provide a Guarantee of Principal, and Your Return Depends Upon the Market Performance.

The 4 Most Common Mutual Fund Terms

1) NAV (Net Asset Value)

NAV (Net Asset Value) represents the singular unit value of a mutual fund.

Simple way to understand NAV:

  • For instance, if you invest ₹10,000 into one fund with an NAV of ₹50, you will receive approximately 200 units of the fund. If the NAV then increases to ₹55, your holdings in the fund will also increase in value accordingly.

Important points about NAV:

  • NAV changes as the market value of the assets that comprise the mutual fund changes.
  • A low NAV does not indicate that the fund is more affordable or has superior quality, the difference in the NAV between two mutual funds can simply be due to when they originated and the difference in size between the two.

Why should beginner investors focus on NAV? Because it provides a means of determining how many shares you own, and allows the investor to track the performance of the investment in market value terms.

2) SIP (Systematic Investment Plan)

Invest regularly in a mutual fund with a fixed investment amount each month/week/etc. by using SIP.

Example:

  • You invest ₹2,000 monthly in an equity fund through SIP.

Why people prefer SIPs:

  • Habit building: Investing through SIP will develop your habit of investing consistently without fail.
  • Reduces timing pressure: You do not need to guess at the best day to invest.
  • Rupee-cost averaging: When markets are down, your SIP buys more units; when markets are up, it buys fewer units. Over time, this can smooth the average purchase cost.

Investing through SIP is not a guarantee to earn the highest profits and is merely a way of investing. Earnings will continue to depend on how each mutual fund performs.

Common SIP mistakes:

  • Stopping SIP during dip (generally when long-term buying opportunity presents itself)
  • Selecting a fund based upon having high past returns
  • Ignoring risk level (especially applicable when investing into any small cap funds or thematic funds)

3) Expense Ratio

Expense ratio refers to the yearly fee assessed by the fund to manage your capital (e.g., administration, management and operating expenses).

It is expressed as a percentage (for example, 1.2% gross per year based on your investment amount).

In practice, you don’t pay expense ratio as a separate invoice or bill; it’s simply deducted from your fund’s NAV on a daily basis, which has the effect of reducing your returns over time.

Why expense ratio matters:

  • Over long periods, small differences can add up.
  • A high expense ratio doesn’t automatically mean a fund is bad, but you should understand what you’re paying for.

Direct vs Regular Plans (important for expense ratio):

  • Direct plan: A Direct Plan usually has a lower expense ratio since there is no commission paid to a distributor or advisor for marketing the fund.
  • Regular plan: Regular Plan will usually incur a higher expense ratio due to the commission being included in the total expense of the fund.

Most new investors prefer to invest in Direct Plans through their investment platform since investing directly will help reduce overall investing costs, but the decision to use a Direct or Regular Plan will depend upon your need for advisory services and what your investment platform can and cannot provide you.

4) AUM (Assets Under Management)

Assets Under Management (AUM) are the value of assets that a mutual fund (or fund house) manages.

  • AUM: ₹5,000 crore (example)

What AUM tells you:

  • AUM indicates how big the fund is.
  • A larger AUM can mean that the fund has been widely used and established, but is not a guarantee of performance.

How to use AUM as a beginner:

  • Funds with small AUM may have greater operational risk or liquidity limits in some areas.
  • Funds with extremely high AUM in some investment strategies may have difficulty moving quickly (this has a higher relevance in small-cap or niche funds).

AUM is a supporting metric, not a deciding factor by itself.

How Mutual Fund Returns Work

Mutual fund returns come from:

  • Price changes in the assets (stocks or bonds)
  • Dividends/interest earned by the fund’s holdings

Your investment value changes as the NAV changes. That’s why NAV and performance tracking go together.

For equity funds, returns can be volatile in the short term. For debt funds, returns are usually more stable, but they still carry risks (interest rate risk, credit risk).

How to Read a Mutual Fund Table

If your site shows mutual fund tables, these are beginner-friendly signals to include and understand:

  • Category: large-cap, mid-cap, small-cap, flex-cap, index, short-term debt, etc.
  • Risk level: Use simple ways to identify risk level so new investors do not make a decision that is not appropriate for their risk tolerance.
  • Expense ratio: Expense Ratios should be lower, all else equal, for long-term investment decisions.
  • AUM: Assets Under Management) - Indicates the relative size of the fund.
  • Performance periods: Keep in mind that you should consider the 1-year, 3-year and 5-year performance periods before you make a decision based on the 1-year performance level alone..
  • Benchmark: You will want to compare the performance level of the fund with that of its relevant index.
  • Exit load: A fee you have to pay if you redeem your mutual fund investment prior to the end of the fund's holding period.
  • Minimum SIP amount: This will assist you with your planning.

Conclusion

When beginning to invest in mutual funds, it is crucial that you understand the fundamentals of investing in mutual funds before making any investments. The four basic vocabulary words that will help you to invest inmutual funds are: Net Asset Value (NAV), Systematic Investment Plan (SIP), Expense Ratio and Assets Under Management (AUM). Once you have a clear understanding of these four terms, you will find it much easier to read through various mutual fund listings.

To begin investing in mutual funds, select one or two non-complex categories of funds that fit with your personal goals, while also taking into consideration the expense ratios and other associated costs related to investing in mutual funds. Finally, be cautious of selecting mutual funds that have had good short-term investment returns only.

FAQs

1) What is NAV in mutual funds?

NAV (Net Asset Value) is the per-unit price of a mutual fund. It changes daily based on the value of the fund’s underlying investments. Your investment value rises or falls as the NAV changes.

2) What is a SIP and how does it work?

A SIP (Systematic Investment Plan) is a method of investing a fixed amount regularly into a mutual fund. It helps build discipline and can reduce the stress of timing the market, but returns are not guaranteed.

3) What is a good expense ratio for mutual funds?

There isn’t one perfect number, but lower expense ratios generally help long-term returns. Index funds and direct plans typically have lower expense ratios than actively managed or regular plans.

4) Does higher AUM mean a mutual fund is better?

Not necessarily. AUM shows how much money a fund manages. It can indicate size and popularity, but fund quality depends on category fit, risk, cost, and performance consistency.

5) Are mutual funds safe for beginners?

Mutual funds can be beginner-friendly, but they still carry risk. Equity funds can be volatile in the short term, and debt funds have interest rate and credit risks. Choosing the right category for your goal is key.