What Are Index Funds and Why You Should Invest in Them

What Are Index Funds and Why You Should Invest in Them
The recent stock market rout has made smart investors realize that the joy is in diversification. No matter the type of assets you invest in or the amount you choose to invest, if you have a diversified portfolio, your money is safe, no matter the market situation. While I am a fan of the stock market, I did start to have my concerns about putting all my money in one basket and this is when I came across index funds. 
Index funds are an ultimate example of passive investing and if you are someone who likes to invest and set it aside, index funds can be a good choice. In this guide, we help you understand what are index funds and why you should add them to your portfolio. 

What are index funds?

Index funds are a type of mutual fund or exchange-traded fund (ETF) that track the performance of a particular stock market index, like the S&P 500 or the NASDAQ Composite. The funds are designed to replicate the holdings and performance of a benchmark index by holding a representative sample of the stocks or securities that make up that index. 
They do not pick specific stocks but provide exposure to the entire market or a particular market sector, helping with diversification at a low cost. Index funds can effectively allow investors to participate in the stock market without engaging in the time-consuming process of picking individual stocks.

How do index funds work?

Let us understand how index funds work.
A fund manager creates an index fund by selecting a basket of stocks that closely mirror the composition of a specific market index. For example, if the fund is designed to track the S&P 500, the fund manager will select a portfolio of 500 stocks representing a cross-section of the U.S. stock market. 
Once the fund is created, the fund manager typically adopts a passive management approach, meaning they do not attempt to beat the market or make active investment decisions. Instead, the fund manager simply tracks the performance of the underlying index by holding the same stocks in the same proportions as the index. The fund manager may periodically rebalance the fund by buying or selling stocks.
As the underlying stocks in the index fund pay dividends or experience capital gains, the fund also distributes these earnings to its shareholders in proportion to their holdings in the fund.

How to choose an index fund?

Choosing an index fund can be a straightforward process, but there are some important factors to consider to ensure that you select the right fund for your investment goals and needs.
  • Know your investment goals. Before you choose an index fund, it's important to consider your investment goals, such as your risk tolerance, investment horizon, and return expectations.
  • Decide on a market index. There are many different market indices that index funds can track, such as the S&P 500, the Dow Jones Industrial Average, or the Russell 2000. Consider which market index you want to invest in based on your investment goals and the level of diversification you want.
  • Compare the cost: Look for index funds with low expense ratios, which are the fees charged by the fund to manage your investments. Lower expense ratios can help you to keep more of your investment returns and maximize your long-term gains.
  • Review fund holdings. Take a look at the fund's holdings to ensure that they align with your investment goals and preferences. For example, if you want to avoid investing in certain sectors or industries, make sure that the fund does not have significant exposure to those areas.
  • Consider the fund's performance. While past performance does not guarantee future returns, reviewing the fund's performance history can help understand how it has performed in different market conditions.
  • Evaluate the fund manager's reputation. Consider the reputation and experience of the fund manager or management team. You want to choose a fund managed by professionals with a track record of success.

Types of index funds

There are several types of index funds that investors can choose from. Here are some of the most common ones:

Market-cap weighted index funds

These index funds track a market index, such as the S&P 500 or the Russell 2000, and weigh the holdings based on the market capitalization of each company. This means that larger companies will have a greater impact on the fund's performance.

Equal-weighted index funds

These index funds give each company an equal weighting, regardless of its market capitalization. This can provide a more diversified portfolio but may result in lower returns if larger companies outperform smaller ones.

Sector-specific index funds

These index funds track a specific market sector, such as technology or healthcare. This allows investors to focus their investments on a particular area of the economy.

International index funds

These index funds track indices outside the United States, such as the MSCI EAFE or the FTSE Developed All Cap ex US.

Bond index funds

These index funds track bond indices, such as the Bloomberg Barclays Aggregate Bond Index or the ICE BofA US Corporate Index. They provide exposure to the fixed-income market and can provide income through interest payments.

Environmental, social, and governance (ESG) index funds

These index funds invest in companies that meet certain ESG criteria, such as reducing carbon emissions or promoting diversity and inclusion. They aim to align with investors' values while still providing exposure to the market.

Where can I buy index funds?

To buy index funds, investors can typically open an account with an investment firm or financial institution, such as an online brokerage or mutual fund company, and then select the index funds they wish to invest in. Investors can typically purchase index funds through their brokerage account and choose to invest a lump sum or set up automatic contributions over time. Index funds can be purchased through a variety of investment firms and financial institutions, including:

Online brokerages

Many online brokerages, such as Fidelity, Vanguard, and Charles Schwab, offer investors a wide range of index funds.

Robo-advisors

Robo-advisors, such as Betterment and Wealthfront, provide automated investment services that use index funds as part of their investment strategy.

Mutual fund companies

Many mutual fund companies, such as Vanguard, offer index funds as part of their investment offerings.

Banks

Some banks, such as Bank of America and Wells Fargo, offer investment services that include index funds.

What to watch out for when investing in index funds?

While investing in index funds can be a great way to build wealth over the long term, investors should be aware of some potential risks and drawbacks. Here are a few things to watch out for when investing in index funds:

Fees

Index funds typically have lower fees than actively managed funds, but they can still have expenses that eat into your returns. Be sure to compare the fees of different index funds and choose those with the lowest expense ratios.

Tracking errors

Although index funds are designed to track a specific index, they may not perfectly replicate its returns due to fees, taxes, and cash holdings. Be sure to research a fund's tracking error before investing in it.

Lack of diversification

While index funds provide instant diversification, they can still be heavily weighted toward a particular sector or industry. Be sure to understand the fund's holdings and ensure that it is properly diversified.

Overconcentration

It's important to avoid investing too much of your portfolio in a single index fund, as this can leave you vulnerable to downturns in that particular market. Be sure to diversify your holdings across multiple funds and asset classes.

Market risk

Index funds are still subject to market risk, meaning their value can fluctuate based on the performance of the underlying market. Be prepared for short-term fluctuations and remain committed to your long-term investment strategy.

Liquidity

While index funds are generally easy to buy and sell, some funds may have low trading volume, making executing trades at desired prices difficult.

Pros and cons

Pros
  • Low cost. Index funds are typically lower cost than actively managed funds, as there is no need for extensive research and analysis.
  • Diversification. Index funds expose investors to a broad range of stocks or securities, which can help reduce risk through diversification.
  • Passive investing. Index funds offer a passive investing approach, meaning investors don't need to manage their portfolios actively.
Cons
  • Limited upside potential. While index funds offer steady returns over the long term, they may not provide the same potential for higher returns as actively managed funds or individual stocks.
  • No control over holdings. Because index funds are designed to track the performance of a particular market index, investors have no control over the specific stocks or securities that the fund holds.
  • Market risk. Index funds are still subject to market risk, meaning they can experience value fluctuations due to changes in the overall stock market.

Who should invest in index funds?

  • Beginner investors. Index funds can be a great way for novice investors to gain exposure to the stock market without the need to have a deep understanding of individual stocks and how to pick them. 
  • Passive investors. Passive investors who prefer a buy-and-hold strategy and want to achieve market returns without actively managing their portfolio should consider index funds.
  • Investors seeking low-cost options. Index funds are typically lower cost than actively managed funds as there is no need for extensive research and analysis, which can result in lower fees and expenses for investors.
  • Investors looking for diversification. By investing in an index fund, investors can gain exposure to a wide range of stocks, which can help to diversify their portfolio and reduce risk.

Who shouldn't invest in index funds?

  • Hands-on investors. Investors who enjoy actively managing their portfolios and picking individual stocks may not find index funds to be a suitable investment option.
  • Investors with a specific investment strategy. Index funds are designed to track the performance of a particular market index, which may not align with the investment strategy or goals of all investors. 
  • Those who want high liquidity. While index funds are generally considered a liquid investment, they may not be suitable for investors who require frequent access to their money.

How they compare 

Index funds vs. ETFs

Index funds and ETFs (Exchange-Traded Funds) are popular investment options for investors wanting to track a market index. Index funds are typically bought and sold once daily at the end of the trading day, whereas ETFs can be bought and sold throughout the trading day, like individual stocks. Index funds generally have lower fees than ETFs and may have higher minimum investment requirements than ETFs, making them less accessible for some investors.

Index funds vs. mutual funds

Index funds and mutual funds are both investment vehicles that allow investors to pool their money together and invest in a diversified portfolio of assets, such as stocks and bonds. IIndex funds are designed to track a specific market index, such as the S&P 500 or the Dow Jones Industrial Average. On the other hand, mutual funds can be actively managed or passively managed and have a variety of investment strategies. Index funds generally have lower fees than mutual funds because they are passively managed and require less active management by fund managers.

Index funds vs. individual stocks

Index funds provide instant diversification because they invest in a broad range of stocks, whereas individual stocks are focused on a single company. Investing in individual stocks requires great knowledge and research, including analyzing financial statements, keeping up with company news and developments, and understanding industry trends. On the other hand, index funds can be purchased and managed by investors with little investment knowledge or experience. While individual stocks have the potential for higher returns, they are also riskier and more volatile. Index funds provide steady returns over the long term.

FAQs

Are index funds safe?
Index funds can be a relatively safe investment option for investors who are looking to build wealth over the long term. This is because they offer diversification, low cost and transparency so you can see what your fund is invested in.
What is the average cost of buying index funds?
The cost of buying index funds can vary depending on several factors, including the specific fund, the investment firm or platform you use, and the type of account you have. However, index funds are generally known for having low costs compared to other types of investment products. One of the primary costs associated with investing in index funds is the expense ratio, which is the annual fee that the fund charges to cover its operating expenses. The expense ratio is expressed as a percentage of the fund's assets under management, and typically ranges from 0.05% to 0.5% or higher, depending on the fund.
What is an example of an index fund?
Common index funds include the S&P 500, Wilshire 5000 Total Market Index and Russell 2000 Index.

The bottom line

Overall, investing in index funds can be a great way to diversify your portfolio, lower your investment expenses, and benefit from consistent returns over the long term. While index funds may not offer the same potential for high returns as actively managed funds or individual stocks, they can be a reliable and convenient investment option for many investors. However, index funds do not fit everyone’s portfolio, so you must do your due diligence before investing in one. 

Joy Wallet is an independent publisher and comparison service, not an investment advisor, financial advisor, loan broker, insurance producer, or insurance broker. Its articles, interactive tools and other content are provided to you for free, as self-help tools and for informational purposes only. They are not intended to provide investment advice. Joy Wallet does not and cannot guarantee the accuracy or applicability of any information in regard to your individual circumstances. We encourage you to seek personalized advice from qualified professionals regarding specific investment issues. Featured estimates are based on past market performance, and past performance is not a guarantee of future performance.

Our site doesn’t feature every company or financial product available on the market. We are compensated by our partners, which may influence which products we review and write about (and where those products appear on our site), but it in no way affects our recommendations or advice. Our editorials are grounded on independent research. Our partners cannot pay us to guarantee favorable reviews of their products or services.

We value your privacy. We work with trusted partners to provide relevant advertising based on information about your use of Joy Wallet’s and third-party websites and applications. This includes, but is not limited to, sharing information about your web browsing activities with Meta (Facebook) and Google. All of the web browsing information that is shared is anonymized. To learn more, click on our Privacy Policy link.

Images appearing across JoyWallet are courtesy of shutterstock.com.

Share this article

Find Joy In Your Wallet