What You Should Know Before Investing in Mutual Funds

NEW YORK, Nov. 6, 2026 — Mutual funds give investors access to portfolios of stocks, bonds, and other securities through a single investment. However, choosing among thousands of available funds requires more than comparing recent returns. Investors need to understand how each fund invests, what it charges, how its holdings fit into a portfolio, and whether its strategy matches their financial goals.

Mutual fund ownership remains widespread in the United States. In 2025, 72.7 million U.S. households owned mutual funds, representing 123.2 million individual investors.

Fund Categories

Mutual funds are generally classified according to the securities they hold and their investment objectives. Understanding these categories is the first step in comparing funds because each carries a different level of risk and serves a different purpose.

Domestic equity funds invest primarily in stocks issued by U.S. companies. Some focus on large-cap companies, while others invest in mid-cap or small-cap businesses. Funds may also concentrate on particular investment styles, such as growth or value, or specific sectors, including technology, healthcare, and financial services.

International equity funds invest in companies outside the United States. Some focus on developed economies, while others concentrate on emerging markets. Global equity funds may invest in both U.S. and foreign companies, so investors should check their geographic exposure before comparing them with funds that invest exclusively overseas.

Fixed-income funds, commonly called bond funds, invest in debt securities issued by governments, municipalities and corporations. Their portfolios may include government bonds, investment-grade corporate debt, high-yield bonds or municipal securities. Interest-rate movements, credit quality and the maturity of the bonds can affect returns and risk.

Money market funds invest in short-term, highly liquid debt instruments. They are generally used for cash management and short-term needs, rather than long-term capital growth. Although they seek to maintain a stable net asset value, they are not bank deposits and are not insured by the Federal Deposit Insurance Corporation.

Allocation funds hold a mix of asset classes, usually stocks and bonds. Their stock-to-bond proportions depend on the fund's investment objective. Target-date funds are one type of allocation fund: they adjust their asset mix over time as the target retirement date approaches.

Investors should compare funds within the same category before concluding performance. A bond fund and an international equity fund have different objectives and risk factors, so their returns are not directly comparable.

Fund Returns

Past performance is one of the most visible measures in a fund profile, but it needs context. A fund with a high return over the previous year may have benefited from a temporary market trend or taken greater risks than comparable funds.

Investors commonly review one-, five- and 10-year annualized total returns. Annualized returns show the average yearly rate over a specified period, accounting for compounding. They differ from cumulative returns, which measure the total gain or loss over the entire period.

Total returns account for changes in a fund’s value and reinvested distributions, such as dividends and interest. When comparing funds, investors should check that the figures cover the same periods and use the same calculation method.

A fund’s performance should also be assessed against an appropriate benchmark. A domestic large-cap equity fund, for example, should be compared with an index that tracks a similar segment of the U.S. stock market. Comparing it with a small-cap or international index could give a misleading picture of its relative performance.

Investors can also review performance against other funds in the same category. This comparison shows how a fund has performed relative to its peers, although rankings can change from one period to another.

Returns over several market cycles can reveal more than a single strong year. Investors should examine how a fund performed during market declines as well as periods of growth. Past performance does not guarantee future results, and historical returns should not be treated as a forecast.

Fund Expenses

Fees reduce the portion of a fund’s returns that investors keep. Even small differences in annual expenses can affect the value of an investment over time, particularly when the money remains invested for many years.

The expense ratio is the annual operating expense charged by a mutual fund, expressed as a percentage of its assets. It generally covers portfolio management, administration, distribution, and other operating expenses. The amount is deducted from fund assets rather than billed separately to each shareholder.

According to the Investment Company Institute, the 2025 asset-weighted average expense ratio was 0.40% for U.S. equity mutual funds, 0.36% for bond mutual funds, and 0.57% for hybrid mutual funds. These averages reflect the expenses borne by investors relative to fund assets, rather than a simple average across all available funds.

Investors should also check for charges that are separate from the expense ratio. These may include sales loads, redemption fees, exchange fees, and account fees. Some share classes of the same fund carry different expenses or sales charges, making it important to compare the correct share class.

A lower expense ratio does not automatically make a fund the better choice. Investors should weigh its fees against its investment strategy, performance history, holdings and services. However, when two funds have similar objectives and portfolios, their expense ratios can be an important point of comparison.

Fund Holdings

A fund’s holdings show what investors own through the portfolio. Reviewing them can reveal whether the fund's investments match its stated objective and whether it duplicates exposure already present elsewhere in an investor’s portfolio.

Investors can examine the largest holdings, sector allocations, geographic exposure, and the types of securities held. A domestic equity fund, for example, may have a large share of its assets in a small number of technology companies. That concentration can make its performance more sensitive to developments affecting those businesses or the sector.

Portfolio overlap also deserves attention. Two funds with different names may hold many of the same stocks. Owning both does not necessarily provide the diversification an investor expects. Comparing their top holdings and sector allocations can reveal how much exposure they share.

Turnover is another useful measure. It indicates how frequently a fund buys and sells securities during a given period. Higher turnover can lead to additional trading expenses and, in taxable accounts, potentially more taxable capital gains distributions. The effect depends on the fund's strategy and the investor's tax situation.

Fund holdings and portfolio data are available through shareholder reports and other fund disclosures. Investors should check the reporting date because portfolio information can change as managers buy and sell securities.

Active and Index Funds

Mutual funds differ in how they select investments. Actively managed funds rely on portfolio managers to select securities to meet a stated objective or outperform a benchmark. Index funds seek to track the performance of a particular market index.

Active funds may appeal to investors who want a manager to select securities, adjust portfolio holdings, or pursue a particular strategy. Their results depend on the manager's decisions, research, and ability to perform well after expenses. Management fees and trading activity can also affect returns.

Index funds generally follow a rules-based strategy that tracks an index. They do not attempt to select investments to outperform that benchmark. Their performance may differ from the index because of expenses, trading costs, cash holdings and the way the fund tracks the index.

Neither type is automatically better. Investors comparing an active fund with an index fund should examine their objectives, holdings, fees, benchmark and performance over several periods. A fair comparison also requires funds that invest in similar asset classes and market segments.

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Funds for Financial Goals

The choice of a mutual fund should reflect the purpose of the investment and the time available to reach that goal. Investors saving for retirement several decades away may have different needs from those setting aside money for a home purchase in a few years.

A longer investment horizon may allow an investor to accept greater exposure to stock market fluctuations. Someone with a shorter time frame may place greater emphasis on preserving capital and having access to the money when needed. The appropriate balance depends on personal circumstances, financial obligations, and tolerance for losses.

Investors should also consider how a fund fits with their existing assets. A portfolio that already has substantial exposure to U.S. stocks may not need another fund with nearly identical holdings. A bond fund or an international equity fund may provide a different type of exposure, depending on the investor's objectives.

Tax treatment also matters. Distributions from mutual funds held in taxable accounts may create tax liabilities, even when investors reinvest the money. Capital gains, dividends and interest may receive different tax treatment. Retirement accounts have separate rules, so investors should consider the account in which they plan to hold the fund.

Fund Selections

Before investing, readers should review a fund’s prospectus, shareholder reports and other official disclosures. The prospectus explains the fund's objectives, principal investment strategies, risks, fees and operating details. Shareholder reports provide information about portfolio holdings, performance and fund operations.

Investors should verify the fund's full name, ticker symbol and share class before making a purchase. Different share classes may invest in the same portfolio but carry different fees, eligibility requirements and sales charges. Selecting the wrong class can affect the amount paid over time.

Fund screeners and comparison tools can narrow the available choices by category, expense ratio, returns, risk measures and minimum investment. These tools are useful for initial research, but their rankings should not replace a review of the fund's official documents.

A sound comparison considers the full picture: what the fund owns, how it is managed, how it has performed, what it charges, and whether it fits the investor's financial goals. No single rating or performance figure can answer all of those questions.