Money market account vs. money market fund: What’s the difference?
If you’re looking for a safe place to invest your money, you may be trying to decide between a money market account or a money market mutual fund. Both offer steady returns and are less volatile than investing in the stock market.
Despite the similarities—and similar-sounding names—there are differences between a money market account and a money market mutual fund. Understanding them can help you choose the right one for your financial goals.
Key Points
- Money market accounts are insured savings products offered by banks and credit unions and insured by the federal government for up to $250,000.
- Money market mutual funds are low-risk investments sold by brokerage firms and fund companies that invest in cash and cash equivalents.
- Both accounts typically pay higher interest rates than regular savings accounts.
Money market account vs. money market mutual fund: How they differ
Money market accounts are bank products that offer higher interest rates than a typical savings account. They are available through most banks and credit unions, and insured by the Federal Deposit Insurance Corporation (FDIC) or by the National Credit Union Administration (NCUA) for up to $250,000 per depositor. Some money market accounts require a minimum deposit to open, but many don’t.
Money market mutual funds are low-risk investments that invest in cash and cash equivalents. The investments within the fund may include short-term U.S. Treasuries, certificates of deposit (CDs), government bonds, and corporate debt securities.
These funds are viewed as a safe investment, but they still have some measure of risk. Because share prices can change in extreme market conditions, there is a risk of loss when investing in a money market fund—albeit a small one. New federal regulations adopted in 2023 help to ensure money market fund account holders will be able to redeem their funds for cash should the number of redemptions suddenly surge.
| Money market account | Money market mutual fund |
|---|---|
| Deposit account | Investment fund |
| Deposit insurance is provided by FDIC or NCUA up to $250,000 per depositor | SIPC insurance up to $500,000 (does not protect against market losses) |
| Interest is paid based on the account interest rate and balance | Interest is earned based on returns from the fund’s investments |
| Available at most banks and credit unions | Available through investment brokers, fund companies, and in some retirement accounts |
| Many accounts charge no monthly maintenance fees | Most funds have an annual fee |
What is a money market account?
Money market accounts offer high interest rates, but they may also come with more restrictions than a regular bank account. Money market accounts are available from most national and online banks and don’t typically charge fees to open or maintain an account.
Money market accounts usually come with check-writing privileges, making accessing your cash easier than with a savings account. Many also come with an ATM card that allows you to withdraw cash, check account balances, and make deposits.
But money market accounts may come with restrictions on the amount of withdrawals you can make each month. Some deposit accounts can impose a limit of six withdrawal transfers per month, according to FDIC Regulation D. The rule was amended in 2020 to remove transaction limits on savings accounts, but some banks still impose a fee for exceeding them.
Some money market accounts also come with minimum deposit requirements, while others may require a minimum balance to earn the highest interest rate offered by the account.
What is a money market mutual fund?
A money market mutual fund, or money market fund, is an investment that holds cash and cash-equivalent securities within the fund. It’s a low-risk investment that allows investors to earn a higher interest rate than a typical savings account. Money market funds are priced at $1 a share.
These funds are insured by the Securities Investor Protection Corporation (SIPC) for up to $500,000 to protect against loss of access to cash or investments due to a failing brokerage firm. But the insurance does not protect against the loss of value of any investments.
Money market funds are typically composed of:
- Short-term U.S. Treasury securities
- Government bonds
- Certificates of deposit (CDs)
- Corporate bonds
- State, local, or municipal debt securities
Money market funds can only hold short-term securities with a maximum maturity of 397 days. Using such short-term securities helps reduce the effect that changes in interest rates may have on the bonds and other securities held in the fund, known as duration risk.
But even with new regulations to help reduce the risk of money market mutual funds, they can still lose money. In times of extreme economic turmoil, if there are substantial withdrawals from a specific money market fund, they may “break the buck” and trade for less than $1 a share.
The risk of these funds trading for less than $1 a share means they are riskier than money market accounts—although only in very rare cases. One notable case was the Reserve Primary Fund, which broke the buck during the global financial crisis in 2008.
When might you choose a money market account?
Money market accounts are an alternative to a traditional savings account that allows you to earn higher interest rates on your money. They also make accessing your cash easier than a money market fund or other types of investments, making them a better place to park savings such as an emergency fund or house down payment.
When might you choose a money market mutual fund?
Money market funds are the default cash holding instrument for many brokerage accounts. This means you can earn interest on cash held within your brokerage without needing to move funds to an external savings account. Money market funds can also be a low-risk way to earn interest on extra cash you have lying around.
Just remember that although money market funds are low risk, they are not risk free, and there is a potential for loss should you sell a money market fund during times of extreme economic turmoil.
The bottom line
If you’re looking for a low-risk place to stash your cash, either a money market account or a money market mutual fund is a safe bet. But while money market accounts are insured savings accounts that allow you to earn true “risk-free” interest, money market funds are investment products that could potentially lose money in volatile markets.
If you’re looking for other no- or low-risk investments, consider U.S. Treasuries, which pay higher rates than typical savings accounts and are offered in a variety of terms. CDs also pay a high fixed interest rate for locking up funds for a set period and are FDIC insured.