Yes, a money market account can lose money, but the risk depends on what you hold inside it
A money market account itself—the deposit account at your bank—will not lose the principal you deposit. Banks insure these accounts through the FDIC (Federal Deposit Insurance Corporation) up to $250,000 per depositor, per bank. That means if your bank fails, you get your money back.
But if your money market account holds money market mutual funds instead of a bank deposit, the value can drop. Mutual funds invest in short-term bonds, commercial paper, and other debt instruments. When interest rates rise or the credit quality of those investments declines, the fund's share price falls. You lose money on paper immediately, and if you withdraw, you lock in that loss.
The confusion exists because the term "money market account" describes two different products: a bank deposit (safe from loss) and a mutual fund (subject to market risk). Your statement or account opening documents will tell you which one you own.
Key Takeaways
- Bank money market accounts are FDIC-insured and cannot lose principal, though interest rates can fall and reduce your earnings.
- Money market mutual funds can lose value when interest rates rise or bond prices fall, and losses are real if you sell during a downturn.
- Check your account documents to confirm whether you hold a bank deposit or a mutual fund—the name alone does not tell you.
- Even in a bank money market account, your purchasing power can decline if inflation outpaces the interest rate you earn.
How FDIC insurance protects bank money market accounts
If you hold a money market account at a bank or credit union, the FDIC or NCUA (National Credit Union Administration) insures your deposit. This means the federal government guarantees you will get your money back, up to $250,000, even if the institution fails. The account holder, not the account type, determines the limit—so if you have $250,000 in a money market account and $250,000 in a savings account at the same bank, each is insured separately.
This protection covers the principal you deposit. It does not protect you from earning less interest than you expected. If your bank cuts the rate it pays on money market accounts, your balance stays the same but your future earnings shrink. That is a loss of income, not a loss of principal.
Why money market mutual funds can drop in value
A money market mutual fund is a pool of investments managed by a fund company. The fund buys short-term debt—Treasury bills, commercial paper from corporations, certificates of deposit from banks. When you buy into the fund, you own shares. The share price moves based on the value of the underlying investments.
When interest rates rise, existing bonds and short-term debt become less attractive because new investments pay higher rates. Investors sell, pushing prices down. A fund holding bonds that now pay below-market rates will see its share price fall. If you sell your shares during this period, you realize the loss.
Credit risk also matters. If a corporation that issued commercial paper held by the fund defaults, the fund's assets decline and share prices fall. This is rare in money market funds because they focus on high-quality, short-term debt, but it is possible.
The difference between principal loss and purchasing power loss
Your bank money market account will not lose dollars. But inflation can erode what those dollars buy. If you earn 0.5% interest while inflation runs at 3%, your purchasing power declines by roughly 2.5% per year. You have the same number of dollars, but they are worth less in real terms.
This is not a loss in the accounting sense—your bank statement shows the same balance. But it is a real economic loss. Over time, money that sits in a low-interest account falls behind rising prices. This risk exists in any account, but it is most acute when interest rates are low and inflation is high.
When money market mutual funds stabilize at $1 per share
Most money market mutual funds are structured to maintain a stable share price of $1. The fund distributes earnings as dividends rather than letting the share price fluctuate. This makes them feel like bank accounts—your balance moves only when you deposit, withdraw, or earn interest.
But this stability is not may provide. In rare circumstances—usually during financial crises—money market funds have "broken the buck," meaning the share price fell below $1. This happened to some funds during the 2008 financial crisis when Lehman Brothers collapsed and funds holding its commercial paper took losses. The U.S. Treasury had to step in and may provide money market funds to prevent widespread panic.
Since then, regulations have tightened. Funds must hold higher-quality investments and maintain larger cash reserves. Breaking the buck is now extremely unlikely, but it remains theoretically possible.
How to know which type of money market account you own
Your account statement or prospectus will state whether you hold a bank deposit or a mutual fund. Look for language like "money market deposit account" or "MMDA"—that is a bank product. If the document mentions "shares," "net asset value," or "NAV," you own a mutual fund.
You can also call your bank or brokerage and ask directly. The distinction matters because it determines your risk and your protections. A bank money market account is stable but earns low interest. A money market mutual fund can earn slightly more but carries market risk.
What happens if you need to withdraw during a market downturn
If you hold a bank money market account, you can withdraw at any time without loss. The bank must give you your full balance, though some accounts limit the number of withdrawals per month (typically six).
If you hold a money market mutual fund and the share price has fallen, withdrawing locks in your loss. You receive cash equal to the current share price times the number of shares you own. If you bought at $1 per share and the price is now $0.98, you lose 2% of your investment. Waiting for the price to recover might restore your balance, but there is no may provide.
Frequently Asked Questions
Can I lose money in a bank money market account?
No, the principal you deposit is FDIC-insured up to $250,000. You cannot lose the dollars you put in. However, if interest rates fall, your earnings will decline, and inflation can reduce your purchasing power over time.
What is the difference between a money market account and a money market fund?
A money market account is a bank deposit insured by the FDIC. A money market fund is a mutual fund that invests in short-term debt and can fluctuate in value. The names are similar but the products are different. Check your account documents to see which you own.
Is a money market mutual fund safer than a stock mutual fund?
Yes, money market funds are generally safer because they invest in short-term, high-quality debt rather than stocks. But they still carry market risk and can lose value. They are not insured like bank deposits.
What should I do if my money market fund drops in value?
Decide whether you need the money now. If you can wait, holding may allow the price to recover. If you need it immediately, you will have to sell at the current price and accept the loss. Check the fund's prospectus for any fees or restrictions on withdrawals.
Do money market accounts have withdrawal limits?
Bank money market accounts often limit withdrawals to six per month, though this rule is enforced inconsistently. Money market mutual funds typically allow unlimited withdrawals but may charge a fee if you withdraw within a certain period after purchase.