All About Money Market Funds

When looking for a safe, highly liquid place to park cash while still earning a competitive yield, money market funds are often the top choice for both retail savers and institutional treasurers.

With total assets in U.S. money market funds hovering at an all-time high of nearly 1.00 per share. Any interest earned by the fund’s underlying assets is paid out to investors daily and typically distributed monthly as dividends.

Because they invest in short-duration debt (often with maturities ranging from a few days to a few months), their yields quickly mirror changes in central bank interest rates.

Types of Money Market Funds

Money market funds are categorized based on the types of short-term debt securities they are legally permitted to buy.

1. Government Funds

These funds invest at least 99.5% of their total assets in cash, U.S. Treasury bills, and short-term securities issued or guaranteed by the U.S. government or its agencies (such as Fannie Mae or the Federal Home Loan Banks). They also heavily utilize repurchase agreements (repos) collateralized by government debt. Government funds are considered the safest tier of MMFs.

2. Prime Funds

Prime money market funds invest in floating-rate debt and corporate commercial paper (short-term corporate loans) issued by high-quality corporations, alongside government securities. Because they take on a microscopic amount of private corporate credit risk, they typically offer a slightly higher yield than government funds.

3. Tax-Exempt Funds

Also known as municipal money market funds, these vehicles invest in short-term debt issued by state and local governments. The dividend income generated by these funds is generally exempt from federal income taxes—and in some cases, state and local taxes as well. They are highly favored by investors in high tax brackets.

How They Compare to Bank Savings Accounts?

While money market funds feel and behave much like high-yield savings accounts (HYSAs), they are structurally different financial instruments.

Feature	Money Market Fund	High-Yield Savings Account (HYSA)
Structure	Mutual fund holding short-term debt securities.	Deposit account at a banking institution.
Insurance	Not FDIC insured. Regulated by the SEC under strict liquidity and quality rules.	FDIC insured up to 1.00 per share due to an unprecedented debt default or systemic liquidity crisis. Inflation Risk: Because these funds strictly prioritize stability over growth, their yields may not keep pace with inflation over long horizons, eroding purchasing power over time. Interest Rate Volatility: If central banks embark on a rate-cutting cycle, the yields on money market funds will drift downward in tandem, reducing passive income streams. How to Buy and Choose a Fund? Most major brokerages offer native money market funds with minimal investment thresholds, sometimes requiring as little as $1 to start. When selecting a fund, pay close attention to the 7-Day Yield (the standardized metric showing the fund’s annualized net earnings over the trailing seven days) and the Expense Ratio (the management fee deducted from the yield). Lower expense ratios directly translate to more interest remaining in your pocket. Jerry Grzegorzek I am the Founder and Editor-in-Chief of the SuperBusinessManager.com website. I am the EU citizen with approximately 20 years of experience in secondary and higher business education in both public and private sectors. Currently living with my wife and our two adorable children in China where I teach Business Management and Economics at K-12 international schools. Professionally, I am an experienced Lecturer and Researcher in Business Management and Economics, as well as IB Examiner for DP Business Management at International Baccalaureate (IB). Privately, I enjoy reading and collecting books on business management, personal finance and investing. You can contact me at jerrygrzegorzek@hotmail.com « Strategic Asset Allocation (SAA)    |    Tried-And-True Methods Of Managing Investment Portfolios » Scroll to the top Exit mobile version