Securities traded in the over-the-counter market include all of the following EXCEPT:

In the context of securities and the over-the-counter (OTC) market, it is important to understand the nature of the various types of securities and their trading platforms. Open-end mutual funds are a specific type of investment vehicle that allows investors to buy and sell shares directly from the fund at the current net asset value (NAV), which is calculated at the end of each trading day. These funds are typically managed by investment companies and are not traded in the OTC market. Instead, they are bought and sold through the fund company or an authorized broker at the determined daily price.

On the other hand, government securities, common stocks, and municipal bonds are commonly traded in the OTC market due to their specific characteristics and the nature of their trading. Government securities, like Treasuries, and municipal bonds are often traded over the counter because they do not always have a centralized exchange where they are listed. Common stocks can be traded in both the OTC market and stock exchanges, depending on the particular stock's market status.

Overall, open-end mutual funds stand out because they operate under a different structure compared to the other types of securities mentioned, which aligns them firmly within the traditional rules of mutual fund transactions rather than the OTC trading environment.