Yes, money market accounts can lose money, but the mechanism differs depending on whether your account is FDIC-insured
A money market account held at a bank and covered by FDIC insurance cannot lose the principal you deposit—that protection is absolute up to $250,000 per depositor per bank. However, your account can still show a lower balance than you started with if the interest rate drops and you withdraw money during a period when rates are falling, or if you pay fees that exceed the interest you earn. The account itself does not lose value the way a stock or bond can, but your purchasing power can erode if inflation outpaces your interest rate.
If your money market account is held at a brokerage rather than a bank—meaning it invests in actual money market securities like short-term bonds and commercial paper—the principal can decline in value. These accounts are not FDIC-insured. The securities inside can lose value if interest rates rise sharply or if the issuer defaults, though this is rare for the safest money market funds.
Key Takeaways
- Bank money market accounts with FDIC insurance cannot lose your principal, but fees and falling interest rates can reduce your balance over time.
- Brokerage money market accounts invest in actual securities and can decline in value if interest rates rise or an issuer defaults.
- Inflation eroding purchasing power is a real risk even when your account balance stays the same or grows slightly.
- The difference between a bank money market account and a brokerage money market fund matters for whether your money is actually at risk.
How FDIC insurance protects your balance but not your returns
If you hold a money market account at a traditional bank—Chase, Bank of America, a local credit union—the FDIC insures your deposit up to $250,000. This means the bank cannot lose your money through bad lending or investment decisions. If the bank fails, the FDIC steps in and returns your balance in full.
This protection does not may provide your returns. If you deposit $10,000 and the bank's money market rate drops from 4.5% to 2%, you earn less interest going forward. Your $10,000 is still there, but you are earning less on it. If you withdraw during a rate-drop period, you may feel like you lost money because you earned less than you expected—but the principal itself is intact.
Fees can also reduce your balance. Some money market accounts charge monthly maintenance fees, overdraft fees, or fees for falling below a minimum balance. If you pay $15 a month in fees and earn $8 in interest, your account shrinks by $7 each month. Over a year, that is $84 gone. The account did not lose money in the market sense, but your balance declined.
Brokerage money market funds and actual principal risk
A money market fund held at a brokerage like Fidelity, Vanguard, or Charles Schwab is different. These are not bank accounts. They are mutual funds that invest in short-term debt securities—Treasury bills, commercial paper, certificates of deposit from multiple banks, and short-term bonds. The SEC regulates them, not the FDIC.
Because these funds hold actual securities, their value can move. If you buy a money market fund when interest rates are 5% and rates then rise to 6%, the value of the existing securities in the fund drops. You can sell your shares at a loss if you need the money. This is rare and usually small—money market funds are designed to be stable—but it is possible.
The most famous example is the 2008 financial crisis, when the Reserve Primary Fund, a large money market fund, "broke the buck"—its share price fell below $1.00—because it held commercial paper from Lehman Brothers, which defaulted. Investors lost money. This was extraordinary and led to regulatory changes, but it shows that brokerage money market funds carry a small amount of credit risk.
Inflation as a silent balance loss
Even if your money market account balance grows and you never pay a fee, inflation can make that money worth less in real terms. If you earn 2% interest but inflation is running at 3%, you are losing 1% of purchasing power each year. Your account shows a higher number, but you can buy less with it.
This is not a loss in the accounting sense—your bank statement will show growth—but it is a real economic loss. A dollar today buys less than a dollar did five years ago. Money market accounts are meant to preserve capital and provide modest returns, not to beat inflation. If you need your money to grow faster than inflation, you typically need to accept more risk by moving into stocks or longer-term bonds.
When you might withdraw at the worst time
Money market accounts are liquid—you can withdraw whenever you need to. But timing matters. If you deposit money when rates are high and then withdraw when rates have fallen, you feel the impact. You earned less interest than you would have if you had held the account longer or if rates had stayed the same.
This is not the account losing money; it is the cost of liquidity and the reality of changing interest rates. If you need the money in six months and rates drop in month three, you cannot go back in time and lock in the higher rate. This is why money market accounts are best for money you might need soon but do not need when ready—the tradeoff is lower returns than longer-term investments.
Comparing bank accounts to brokerage funds side by side
| Feature | Bank Money Market Account | Brokerage Money Market Fund |
|---|---|---|
| Principal protected? | Yes, up to $250,000 by FDIC | No, value can decline |
| Can you lose money? | Only through fees or inflation | Yes, if interest rates rise or issuer defaults |
| Who regulates it? | FDIC and the bank's regulator | SEC |
| Typical current rates | 4% to 5% (varies by bank) | 4% to 5% (varies by fund) |
| Liquidity | Same-day or next-day withdrawal | Same-day or next-day sale |
What to watch for to avoid unnecessary losses
If you hold a bank money market account, check the fee structure. Some banks charge monthly maintenance fees that can eat into your interest earnings. Compare the stated interest rate against the actual rate you receive after fees—some banks advertise a high rate but charge fees that bring the effective rate down.
If you hold a brokerage money market fund, look at the fund's expense ratio—the annual cost to operate the fund, expressed as a percentage. A 0.01% expense ratio is typical for large funds; anything above 0.1% is worth questioning. Also check what the fund invests in. A fund that holds only Treasury bills and bank CDs is safer than one that holds commercial paper from less-established companies.
For both types, understand that the interest rate you see today is not may provide tomorrow. Rates move with the Federal Reserve's decisions and broader economic conditions. If you are counting on a specific return, you may be disappointed. Money market accounts are meant to be stable and liquid, not to deliver consistent returns.
Frequently Asked Questions
Can a bank money market account go to zero?
No. If your account is FDIC-insured, the bank cannot lose your principal. Even if the bank fails, the FDIC returns your balance up to $250,000. Your account can shrink due to fees or if you withdraw money, but the bank cannot take your balance to zero through its own failure or bad decisions.
What happens if a brokerage money market fund loses value?
You can sell your shares at the lower price and realize a loss, or you can hold and wait for the value to recover. Unlike a bank account, you are not may provide to get your money back. However, money market funds are designed to minimize volatility, so losses are usually small and temporary unless there is a credit event like a default.
Is a money market account safer than a savings account?
At a bank, they have the same FDIC protection and the same safety. The difference is that money market accounts typically require a higher minimum balance and offer higher interest rates in exchange. A savings account is simpler; a money market account offers more return if you can meet the requirements.
Should I move my money market account if rates are falling?
Rates fall across the industry together, so moving to a different bank will not help you avoid the decline. You can lock in a higher rate by moving money to a certificate of deposit (CD) if you do not need access to it for a set period. Otherwise, accept that rates move with the economy and focus on finding a bank with low fees.
Can I lose money if I keep my money market account for years?
Your principal is safe, but inflation can erode its purchasing power. If you earn 2% annually but inflation averages 3%, you are losing ground in real terms. Over ten years, this compounds. Money market accounts are meant for short-term safety, not long-term growth. For longer time horizons, consider investments that historically outpace inflation.