Money market mutual funds are considered to be one of the least volatile types of mutual fund investments

It’s easy to settle your brokerage account trades in other investments, or retrieve funds from a money market mutual fund—generally assets are available by the next business day

The funds are required by federal regulations to invest in short-maturity, low-risk investments, making them less prone to market fluctuations than many other types of investments

Because the duration of money market mutual funds is so short at maximum a few months they are typically subject to less interest rate risk than longer-maturing bond fund investments

Money market mutual funds tend to hold many different securities, with limited exposure

Some money market funds invest in securities whose interest payments are typically exempt from federal, and in some cases, state income taxes; these funds can be a potential source of stable, tax-efficient income