But mutual funds also have features that some investors might view as disadvantages, such as: 

• Costs Despite Negative Returns— Investors must pay sales charges, annual fees, and other expenses (which we'll discuss below) regardless of how the fund performs. And, depending on the timing of their investment, investors may also have to pay taxes on any capital gains distribution they receive — even if the fund went on to perform poorly after they bought shares.
     
• Lack of Control— Investors typically cannot ascertain the exact make-up of a fund's portfolio at any given time, nor can they directly influence which securities the fund manager buys and sells or the timing of those trades.
     
• Price Uncertainty — With an individual stock, you can obtain real-time (or close to real-time) pricing information with relative ease by checking financial websites or by calling your broker. You can also monitor how a stock's price changes from hour to hour — or even second to second. By contrast, with a mutual fund, the price at which you purchase or redeem shares will typically depend on the fund's NAV, which the fund might not calculate until many hours after you've placed your order. In general, mutual funds must calculate their NAV at least once every business day, typically after the major U.S. exchanges close.  

Different Types of Funds 

When it comes to investing in mutual funds, investors have literally thousands of choices. Before you invest in any given fund, decide whether the investment strategy and risks of the fund are a good fit for you. The first step to successful investing is figuring out your financial goals and risk tolerance — either on your own or with the help of a financial professional. Once you know what you're saving for, when you'll need the money, and how much risk you can tolerate, you can more easily narrow your choices. 

Most mutual funds fall into one of three main categories — money market funds, bond funds (also called "fixed income" funds), and stock funds (also called "equity" funds). Each type has different features and different risks and rewards. Generally, the higher the potential return, the higher the risk of loss. 

Money Market Funds 

Money market funds have relatively low risks, compared to other mutual funds (and most other investments). By law, they can invest in only certain high-quality, short-term investments issued by the U.S. government, U.S. corporations, and state and local governments. Money market funds try to keep their net asset value (NAV) — which represents the value of one share in a fund — at a stable $1.00 per share. But the NAV may fall below $1.00 if the fund's investments perform poorly. Investor losses have been rare, but they are possible. 

Money market funds pay dividends that generally reflect short-term interest rates, and historically the returns for money market funds have been lower than for either bond or stock funds. That's why "inflation risk" — the risk that inflation will outpace and erode investment returns over time — can be a potential concern for investors in money market funds. 

Bond Funds 

Bond funds generally have higher risks than money market funds, largely because they typically pursue strategies aimed at producing higher yields. Unlike money market funds, the SEC's rules do not restrict bond funds to high-quality or short-term investments. Because there are many different types of bonds, bond funds can vary dramatically in their risks and rewards. Some of the risks associated with bond funds include: 

Credit Risk — the possibility that companies or other issuers whose bonds are owned by the fund may fail to pay their debts (including the debt owed to holders of their bonds). Credit risk is less of a factor for bond funds that invest in insured bonds or U.S. Treasury bonds. By contrast, those that invest in the bonds of companies with poor credit ratings generally will be subject to higher risk. 

Interest Rate Risk — the risk that the market value of the bonds will go down when interest rates go up. Because of this, you can lose money in any bond fund, including those that invest only in insured bonds or Treasury bonds. Funds that invest in longer-term bonds tend to have higher interest rate risk. 

Prepayment Risk — the chance that a bond will be paid off early. For example, if interest rates fall, a bond issuer may decide to pay off (or "retire") its debt and issue new bonds that pay a lower rate. When this happens, the fund may not be able to reinvest the proceeds in an investment with as high a return or yield. 

Stock Funds 

Although a stock fund's value can rise and fall quickly (and dramatically) over the short term, historically stocks have performed better over the long term than other types of investments — including corporate bonds, government bonds, and treasury securities.