What Are Money Market Funds? A Complete Guide
May 20, 2024 By Susan Kelly

Money market funds are mutual funds that buy high-quality short-term debt assets like commercial paper, tax bills, and certificates of deposit (CDs). People like these funds because they are stable, easy to get money from, and don't pose as much danger as other investments. This guide will discuss the importance of money market funds in great depth, including how they work, their pros and cons, and what investors should think about.


How do Money Market Funds Work?


Money market funds are an essential way to invest because they pool the money of many buyers who want stability, liquidity, and low returns. These funds are spent wisely in a group of low-risk securities, short-term, usually with terms of one year or less. This group includes Treasury bills, commercial paper, certificates of deposit (CDs), and short-term bonds from the government, banking institutions, and corporations. The main goal is to keep each share's net asset value (NAV) at $1. This is done by carefully managing the stock and keeping an eye on it all the time.


Money market funds make most of their money from interest payments on their securities. Investors get this money as profits, usually paid out monthly. Money market funds are very liquid, meaning buyers can cash out their shares anytime without paying heavy fees or following many rules. Regulatory oversight from groups like the Securities and Exchange Commission (SEC) keeps this field open, stable, and safe for investors.


Money market funds usually don't have many risks, but buyers should be aware of some of them, like changes in interest rates, credit risk (especially in prime funds), and problems getting cash when the market is stressed. Even with these things in mind, money market funds are appealing because they offer many investors a safe, liquid, and income-generating investment choice. This makes them an essential part of many investment portfolios.


Types of Money Market Funds


There are various kinds of money market funds. These are the main kinds of money market funds:

Government Money Market Funds:


These funds mostly buy short-term debt assets issued or backed by the U.S. government, its agencies, or its instrumentalities. Treasury bills, notes, and bonds are all types of assets that government money market funds hold. Because the government backs them, these funds are considered among the safest, making them perfect for buyers who want to protect their money.

Prime Money Market Funds:


These funds deal in a wider range of short-term debt instruments, such as corporate bonds, commercial paper, and certificates of deposit (CDs). They might also have a small amount of government bonds. Most of the time, prime funds have slightly higher yields than government funds but also have a slightly higher risk because they invest in business debt. People who invest in prime funds should be aware of the risk of credit and that interest rates can change.

Municipal Money Market Funds:


These funds buy short-term debt released by state and local governments, agencies, and authorities. Some of the things that these funds might hold are local bonds, notes, and tax anticipation notes (TANs). The interest income from city money market funds is usually not taxed at the federal level. For investors in the issuing state, it may also not be taxed at the state or local level. Investors in higher tax brackets may be able to get tax-efficient income from municipal funds.

Treasury Money Market Funds:


Short-term debt securities released by the U.S. Treasury are the only thing that Treasury money market funds invest in. Like government money market funds, these funds offer a high level of safety. However, they may have slightly lower returns because they can only invest in certain things. The full faith and credit of the U.S. government backs money market funds that hold treasury bonds. This makes them a popular choice for investors who don't want to take risks.

Taxable and Tax-Exempt Funds:


Another way to group money market funds is by how they are taxed. You must pay federal income tax if you earn interest on taxable funds like prime and government funds. Tax-exempt funds, like municipal funds, give owners income not taxed by the federal government and may not be taxed by state or local governments if they qualify.

Pros of Money Market Funds

  • Money market funds invest in securities that are easy to sell and low-risk, making them safe for buyers who want to keep their money.
  • Money market fund investors can easily cash out their shares, giving them quick access to cash when needed.
  • These funds net asset value (NAV) stays at $1 per share, which makes them safe and reliable.
  • Money market funds earn money for their investors by paying interest on their securities. Although the returns are lower than those from other investments, they provide a steady flow of income.
  • Money market funds invest in different types of short-term securities from other issuers and industries, which helps with diversification.



Cons of Money Market Funds

People think money market funds are pretty safe, but they have some cons. Some of the cons that come with these funds are:

  • When interest rates change, it can affect the value of the fund's assets and the money it makes.
  • Even though money market funds buy suitable securities, there is still a chance that sellers will not pay back the money. This is especially true for prime and municipal funds.
  • When the market is stable, some assets may become less liquid, making it harder for the fund to meet redemption requests.



Considerations for Investors


People who want to invest in money market funds should think about the following things:

  • Investment Goals: Determine your primary investment goal, such as protecting your capital, making money, or getting cash quickly.
  • Expense Ratios: Compare the expense ratios of various funds to see which ones have lower costs. Lower costs can lead to higher profits.
  • Yield and Returns: To determine the fund's performance, look at its past yields and returns.
  • Tax Considerations: Learn about the tax effects of buying in money market funds, especially municipal funds that may give you income that isn't taxed.


Money market funds are vital because they give buyers a safe and easy way to get their money back. They are suitable for managing short-term cash and keeping capital safe because they are stable, easy to get, and don't bring in much money. Investors should be aware of the risks, like credit risk and changes in interest rates. Investors can reach their financial goals by making wise choices if they know how money market funds work and take certain things into account.