A money market certificate (MMC) is a type of financial instrument that is issued by banks and credit unions.  

It is a low-risk investment option that provides a fixed rate of return for a specified period of time.  

Investors who are looking for a safe place to park their money can consider investing in MMCs as they are considered a safe and reliable investment option. 

The characteristics of a money market certificate are similar to that of a certificate of deposit (CD). 

Both offer a fixed rate of return, and the investor is required to keep the funds invested for a specified period of time.  

The main difference between the two is that MMCs are offered by banks and credit unions, while CDs are typically offered by brokerage firms.

One of the key benefits of investing in a money market certificate is the low level of risk involved. 

The funds invested are insured by the Federal Deposit Insurance Corporation (FDIC) up to $250,000 per depositor, per insured bank, or credit union.