There are a number of pros and cons investors should be aware of when it comes to money market funds. In this article, we'll take a look at these ups and downs.

Money Market Funds: An Overview

Money market investing carries a low single-digit return. When compared to stocks or corporate debt issues, the risk to principal is generally quite low. However, investors need to weigh a number of pros and cons. The downs can greatly outweigh the ups.

Advantages of Money Market Funds

First, let's consider the advantages of putting your money in a money market account.

Great Place to Park Money

When the stock market is extremely volatile and investors aren't sure where to invest their money, the money market can be a terrific safe haven. Why? As stated above, money market accounts and funds are often considered to have less risk than their stock and bond counterparts. That is because these types of funds typically invest in low-risk vehicles such as certificates of deposit (CDs), Treasury bills (T-bills) and short-term commercial paper. In addition, the money market often generates a low single-digit return for investors, which in a down market can still be quite attractive. 

Liquidity Isn't Usually an Issue

Money market funds don't generally invest in securities that trade minuscule volumes or tend to have little following. Rather, they mostly trade in entities and/or securities that are in fairly high demand (such as T-bills). This means they tend to be more liquid; investors can buy and sell them with comparative ease. Contrast this to, say, shares of a small-cap, Chinese biotech company. In some cases those shares may be highly liquid, but for most the audience is probably very limited. This means that getting into and out of such an investment could be difficult if the market were in a tailspin. 

Over time, money market investing can actually make a person poorer in the sense that the dollars they earn may not keep pace with the rising cost of living.

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The Pros And Cons Of Money Market Funds

Disadvantages of Money Market Funds

Now let's talk about the disadvantages of having your funds in a money market account.

Purchasing Power Can Suffer

If an investor is generating a 3% return in their money market account, but inflation is humming along at 4%, the investor is essentially losing purchasing power each year.

Expenses Can Take a Toll

When investors are earning 2% or 3% in a money market account, even small annual fees can eat up a substantial chunk of the profit. This may make it even more difficult for money market investors to keep pace with inflation. Depending on the account or fund, fees can vary in their negative impact on returns. If, for example, an individual maintains $5,000 in a money market account that yields 3% annually, and the individual is charged $30 in fees, the total return can be impacted quite dramatically.

  • $5,000 x 3% = $150 total yield
  • $150 - $30 in fees = $120 profit

The $30 in fees represents 20% of the total yield, a large deduction that considerably reduces the final profit. The above amount also does not factor in any tax liabilities that may be generated if the transaction were to take place outside of a retirement account. 

FDIC Safety Net May Not Be There

Money funds purchased at a bank are typically insured by the Federal Deposit Insurance Corporation (FDIC) for up to $100,000 per depositor, according to Care One Credit Counseling. However, money market mutual funds are not usually government insured. This means although money market mutual funds may still be considered a comparatively safe place to invest money, there is still an element of risk that all investors should be aware of. If an investor were to maintain a $20,000 money market account with a bank and the bank were to go belly up, the investor would likely be made whole again through this insurance coverage. Conversely, if a fund were to do the same thing, the investor might not be made whole again—at least not by the federal government.

The 2008 financial crisis took a lot of the shine off the stellar reputation money market funds had enjoyed. A large money market fund broke the buck—the shares fell below $1.00—triggering a run on the whole money market industry. Since then, the industry has worked with the Securities and Exchange Commission (SEC) to introduce stress tests and other measures to increase the resiliency and repair some of the reputation damage. 

Returns May Vary

While money market funds generally invest in government securities and other vehicles that are considered comparatively safe, they may also take some risks to obtain higher yields for their investors. For example, to try to capture another tenth of a percentage point of return, the fund may invest in bonds or commercial paper that carry additional risk. The point is that investing in the highest-yielding money market fund may not always be the smartest idea given the additional risk. Remember, the return a fund has posted in a previous year is not necessarily an indication of what it may generate in a future year.

It's also important to note the alternative to the money market may not be desirable in some market situations either. For example, having dividends or proceeds from a stock sale sent directly to you (the investor) may not allow you to capture the same rate of return. In addition, reinvesting dividends in equities may only exacerbate return problems in a down market.

Lost Opportunity

Over time, common stocks have returned about 8% to 10% on average, including recessionary periods. By investing in a money market mutual fund, which may often yield just 2% or 3%, the investor may be missing out on an opportunity for a better rate of return. This can have a tremendous impact on an individual's ability to build wealth. (For related reading, see "CPFXX, SPAXX, VMFXX: Top Government Money Market Funds")

Key Takeaways

  • Money market investing can be very advantageous, especially if you need a short-term, relatively safe place to park cash.
  • Some disadvantages are low returns, a loss of purchasing power and that some money market investments are not FDIC insured.
  • Like any investment, the above pros and cons make a money market fund ideal in some situations and potentially harmful in others. If you're in your 30s and holding your retirement savings in a money market fund, for example, you're probably doing it wrong.