A money market fund is a mutual fund that invests in short-term, high-quality debt securities like Treasury bills and corporate bonds. Think of it as a sophisticated cousin to your savings account that aims to keep your money safe while earning modest returns. These funds maintain a steady share price of one dollar and focus on preserving capital rather than chasing big gains. Discover how these funds could fit into your financial strategy.

When investors want to park their money somewhere safe while still earning a little interest, money market funds often become their go-to choice. Think of these funds as the financial world’s equivalent of a cozy savings account that happens to wear a business suit. Money market funds are mutual funds that invest in short-term, high-quality debt securities and cash equivalents, making them much safer than their stock market cousins.
These funds typically buy government securities, corporate commercial paper, repurchase agreements, and certificates of deposit. The goal is simple: preserve your money, keep things stable, and provide some income through dividends. Most money market funds aim to maintain a steady net asset value of one dollar per share, which means your investment won’t bounce around like a hyperactive kangaroo.
Money market funds keep your investment steady as a rock while delivering modest returns through carefully selected short-term securities.
There are several types to choose from. Treasury money market funds put at least 99.5% of their money into U.S. Treasury securities, making them the safest option available. Government funds focus on government securities, while prime funds mix in some corporate debt for slightly higher returns. Tax-exempt funds invest in municipal securities that can help reduce your tax bill.
Money market funds follow strict rules to stay liquid and stable. They can only buy securities that mature within 397 days, and at least half their assets must be available within five business days. The average maturity of their holdings typically stays under 60 days, ensuring everything remains nice and short-term. U.S. funds must maintain daily liquidity of 25% and weekly liquidity of 50% to meet regulatory requirements.
Most funds use something called amortized cost accounting, which helps keep that stable one-dollar share price. This approach values securities at their purchase price rather than constantly adjusting for market fluctuations, creating a smoother ride for investors. Some funds require large minimum investments of $1 million or more, while others have lower minimums for individual investors.
While money market funds are considered low-risk investments, they’re not completely risk-free. Unlike bank accounts, they don’t come with government insurance protection. However, their conservative approach and high-quality investments make them popular choices for people who want to earn modest returns without losing sleep over market volatility. Like other fixed income investments, money market funds provide predictable income streams while helping preserve capital in uncertain market conditions.
They offer an excellent middle ground between traditional savings accounts and riskier investment options.
Frequently Asked Questions
Can I Lose Money in a Money Market Fund?
Yes, investors can lose money in money market funds, though it’s uncommon.
These funds aren’t FDIC-insured like bank accounts. If the fund’s investments lose value, the share price can drop below $1.00, called “breaking the buck.” This happened in 2008 when one fund lost 3% after Lehman Brothers collapsed.
Fund fees might also exceed earnings when interest rates are extremely low.
What’s the Minimum Investment Required for Money Market Funds?
Money market fund minimum investments vary widely depending on the fund type and target audience.
Retail funds often require very low minimums, sometimes as little as $0 to $1, making them accessible to most individual investors.
However, institutional funds typically demand much higher minimums, often $1 million or more, targeting corporations and large investors.
Different share classes within the same fund may also have different minimum requirements.
How Do Money Market Funds Differ From Savings Accounts?
Money market funds and savings accounts differ in several key ways.
Money market funds invest in short-term securities and offer potentially higher returns but aren’t FDIC-insured, making them slightly riskier.
Savings accounts provide FDIC insurance up to $250,000, guaranteeing safety but typically offering lower interest rates.
Money market funds allow share redemptions while savings accounts limit monthly withdrawals under banking regulations.
Are Money Market Funds FDIC Insured?
Money market funds are not FDIC insured because they’re investment products, not bank deposit accounts.
Unlike money market accounts at banks, these funds invest in short-term securities and can lose value.
However, brokerage accounts holding money market funds may have SIPC protection, which is different from FDIC insurance.
This distinction matters because FDIC insurance guarantees deposits while investments carry risk.
Can I Write Checks From a Money Market Fund Account?
Many money market funds offer check-writing privileges to shareholders, allowing direct access to funds without transferring money elsewhere.
Investors typically need to meet minimum requirements, like a $1,000 balance, and complete specific forms to establish this service.
Checks arrive in books of 20 within 5-10 business days.
This feature works well for occasional large payments like tuition or property taxes.


