A mutual fund pools money from many investors to buy a diversified collection of stocks, bonds, or other securities
When you invest in a mutual fund, your money goes into a shared pool managed by a professional fund manager or management team. That manager uses the combined money to purchase a portfolio of investments — typically dozens or hundreds of individual securities. You own a proportional share of everything in that portfolio based on how much money you contributed.
The fund itself is a legal entity that holds all the investments. When the fund buys or sells securities, those transactions happen in the fund's name, not yours. You never own the individual stocks or bonds directly; you own shares of the fund, and those shares represent your stake in the entire portfolio.
Key Takeaways
- A mutual fund manager buys and sells securities with pooled investor money, and you own a share of the entire portfolio rather than individual investments.
- The fund's net asset value (NAV) — the price per share — changes daily based on the total value of all holdings divided by the number of shares outstanding.
- Most mutual funds charge annual fees called expense ratios, which are deducted automatically from fund assets and reduce your returns.
- Mutual funds distribute income from dividends and interest, and capital gains when the manager sells securities at a profit, usually once or twice per year.
- You can buy and sell mutual fund shares through a brokerage account, and transactions settle the next business day at that day's closing price.
How the fund manager makes investment decisions
The fund manager's job is to follow the fund's stated strategy and try to achieve its stated goal — whether that is growth, income, or a mix of both. A growth fund manager looks for stocks expected to increase in value. An income fund manager seeks stocks with high dividends or bonds that pay regular interest. A balanced fund manager splits the portfolio between stocks and bonds.
The fund's prospectus — a document you can read before investing — describes the manager's approach, what types of securities they can buy, and what geographic regions or industries they focus on. The manager makes daily decisions about which specific securities to hold, when to buy, and when to sell, all within those stated boundaries.
Some funds are actively managed, meaning the manager makes frequent buy-and-sell decisions trying to beat the market. Others are index funds, meaning the manager simply buys and holds the same securities in the same proportions as a market index like the S&P 500, with minimal trading.
Understanding net asset value and share price
The price you pay for a mutual fund share is called the net asset value, or NAV. It is calculated by taking the total value of all securities in the fund, subtracting any liabilities, and dividing by the number of shares outstanding. If a fund holds $100 million in securities and has 10 million shares, the NAV is $10 per share.
The NAV changes every business day after the stock market closes, because the value of the securities in the portfolio changes throughout the day. You buy or sell at that day's closing NAV, not at an intraday price. If you place an order to buy shares at 2 p.m. on a Tuesday, you will receive shares at Tuesday's closing NAV, calculated after 4 p.m. Eastern time.
This is different from a stock, which trades throughout the day at changing prices. With a mutual fund, you always know the price you are paying or receiving, but you do not know it until after the market closes.
Fees and expenses that reduce your returns
Mutual funds charge an annual expense ratio — a percentage of your investment that covers the manager's salary, administrative costs, and other operating expenses. Expense ratios typically range from 0.05% to 2% per year, depending on the fund type and whether it is actively or passively managed. Index funds usually charge lower ratios because they require less active management.
The expense ratio is deducted automatically from the fund's assets, so you do not write a check. Instead, the fund's NAV is reduced by the amount of the expenses. Over time, a high expense ratio can significantly reduce your total return. A fund charging 1.5% annually will grow much less than an identical fund charging 0.15%, all else equal.
Some funds also charge a sales load — an upfront commission paid when you buy or sell shares. A front-end load is deducted from your initial investment; a back-end load is charged when you sell. Many funds sold through brokerages have no load, though they may charge higher expense ratios to compensate.
How distributions work and when you receive them
When securities in the fund pay dividends or interest, that income accumulates in the fund. When the fund manager sells a security at a profit, that gain also accumulates. Periodically — usually once or twice per year — the fund distributes this income and these gains to shareholders in the form of a distribution.
You can choose to receive distributions as cash deposited to your account, or you can reinvest them to buy additional fund shares. Reinvestment is automatic unless you change the setting. Either way, distributions are taxable income in the year they are paid, even if you reinvest them immediately.
The fund's prospectus states when distributions typically occur. Some funds distribute quarterly; others distribute annually. The amount varies year to year depending on how much income the fund earned and how many gains the manager realized by selling securities.
Buying and selling mutual fund shares
You purchase mutual fund shares through a brokerage account — either a regular taxable account or a tax-advantaged account like an IRA or 401(k). You place an order to buy a specific dollar amount or a specific number of shares. The order is processed after the market closes that day, and you receive shares at that day's NAV.
When you sell, the same process applies in reverse. You place a sell order during business hours, and it executes at that day's closing NAV. The cash appears in your brokerage account the next business day. There is no waiting period or lock-in period; you can sell whenever you want.
Some mutual funds impose a redemption fee if you sell within a short time after buying — typically 30 to 90 days. This fee discourages rapid trading and protects long-term shareholders from the costs of frequent turnover. The prospectus discloses any redemption fees before you invest.
The difference between open-end and closed-end funds
Most mutual funds are open-end funds, meaning the fund continuously accepts new investor money and issues new shares. When you buy, the fund creates new shares for you. When you sell, the fund redeems your shares. The number of shares outstanding changes constantly.
Closed-end funds issue a fixed number of shares once, then stop accepting new money. After that, shares trade on an exchange like stocks do, and the price is set by supply and demand rather than by NAV. Closed-end funds are less common and typically require more research to understand their pricing and structure.
For most individual investors, open-end mutual funds are the standard choice. They are straightforward to buy and sell, and the price you pay is always tied directly to the fund's underlying value.
Frequently Asked Questions
What happens if the fund manager leaves or the fund closes?
If the manager leaves, the fund company appoints a replacement manager who follows the same strategy. If the fund closes, the manager sells all holdings and distributes the cash to shareholders, usually within a few weeks. You receive your proportional share of the proceeds based on your number of shares.
Can I lose money in a mutual fund?
Yes. If the securities in the fund decline in value, your shares decline proportionally. The only exception is a money market fund, which aims to maintain a stable $1 share price, though this is not may provide. Stock and bond funds fluctuate with market conditions.
How often should I check my mutual fund balance?
That depends on your investment timeline and comfort level. Long-term investors often check quarterly or annually. Frequent checking can lead to emotional decisions during market downturns. Your brokerage provides real-time balance information whenever you log in.
Do I have to reinvest distributions?
No. You can elect to receive distributions as cash instead. However, reinvestment is often the default setting, and reinvesting typically leads to better long-term returns because you buy more shares at lower prices during market downturns.
What is the difference between a mutual fund and an exchange-traded fund?
ETFs are similar to mutual funds but trade on an exchange like stocks, with prices changing throughout the day. Mutual funds trade once daily at closing NAV. ETFs often have lower expense ratios and are more tax-efficient, but mutual funds may be simpler for beginners and allow automatic investments.