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Retirement, Investments, & Insurance for Individuals Learn What are mutual funds and how do they work?

What are mutual funds and how do they work?

One of the choices for your retirement savings may be a mutual fund, a pooled investment with a specific objective to help owners reach their own financial goals.

5 min read |

Quick takeaways 

Mutual funds have both a variety of investments and many investors, who are owners of the fund. A mutual fund has a fund manager, who is in charge of monitoring the performance of the mutual fund. Mutual funds are either actively or passively managed; the former tries to beat the performance of a benchmark index, while the latter tries to match an index’s returns.

When you have retirement savings like an individual retirement account or a 401(k) account, you’ll generally have options for investing your contributions. One such option may be mutual funds. What are mutual funds and how do they work? Here are some insights.

What is a mutual fund?

A mutual fund is what’s called a pooled investment; when you invest in one, you’re an owner of the fund. Every mutual fund has a financial goal, such as “income”; that goal helps determine the investments that make up the mutual fund. Mutual fund owners purchase shares of the fund, which is invested in a lot of different things, not just one company. 

What are the types of mutual funds?

There are two main types of mutual funds: active and passive.

Active mutual funds

Active mutual funds employ a professional manager who constantly chooses and adjusts the mix of investments based on the fund’s goal. That manager uses a market index—say, the S&P 500—as a benchmark and sets out to beat that index. Assets in funds may be structured in a couple of ways.

How active mutual funds are generally invested
BalancedA mix of stocks and bonds invested to maintain a specific balance or exposure
Bond/fixed incomeA fixed (and typically minimal) rate of return from interest income and the purchase of undervalued bonds
International/globalInvested in companies or bonds outside of the U.S., or a combination of investments both in and outside the U.S.
Sector/specialtyInvested in a specific industry or market
Short term/fixed incomeOften low risk, invested in securities that have a very short-term duration, high-quality debt, or cash equivalents
Target date fund/asset allocationInvestment risk adjusted over fund lifecycle (based on a particular target date)
Target riskInvested for a target level of risk—e.g., conservative, moderate, aggressive
U.S. equity/stockInvested in the stocks of companies
Passive mutual funds

A passive mutual fund, on the other hand, chooses an existing index and tries to stay keep pace. Because passive funds try to replicate a market index, they are often referred to as just that—an index fund.

How do mutual funds make money?

If you’re a mutual fund owner, here’s how your investment can generate growth:

  1. Stocks or bonds that are part of the mutual fund pay out dividends and interest.
  2. Assets in the fund increase in value, generating capital gains.
  3. Mutual fund shares you sell have a higher net asset value (see below) than when you bought them for a profit/capital gain.
What are common mutual fund terms to understand?

There are literally thousands of mutual funds in the United States alone, and it can feel overwhelming to sort through choices on your own. A financial professional can help, as can understanding some key mutual fund terms, including:

  • Fees and expenses: Mutual funds typically have both an annual fee and fund management costs.
  • Minimum investment: Most mutual funds require a minimum dollar amount to invest.
  • Net asset value (NAV): A calculation from the fund’s manager, performed at the end of each trading day; it determines the price of mutual fund shares for new investors. NAV = (market value of all shares - fund's liabilities) ÷ number of issued shares
  • Portfolio manager: The person or head of a team of people who manages mutual funds.
  • Prospectus: A document detailing mutual fund objectives and the investment’s portfolio mix. Every investor must receive a copy of or access to the prospectus as a prospective buyer, investor, or participant.
  • Total return: The positive or negative change in the value of a fund over time measured in one-, five-, and 10-year or since inception periods.

What’s included in your retirement savings?

Log in to your Principal account to check out the mix of investments. Don’t have an employer-sponsored retirement account? We can help you set up your own retirement savings.