What type of U.S. government security pays semiannual interest and has maturities between 1 and 10 years?

The correct answer is T-notes. Treasury notes, commonly referred to as T-notes, are U.S. government securities that are issued with maturities ranging from 2 to 10 years and pay interest every six months, known as semiannual interest. This makes them an attractive option for investors looking for a reliable income stream over a moderate investment horizon.

In contrast, T-bonds (Treasury Bonds) have longer maturities, typically over 10 years, and are also semiannual interest payers. T-bills (Treasury Bills) are short-term securities that do not pay interest but are sold at a discount and mature in one year or less. Series EE bonds are savings bonds that earn a fixed interest rate over time and can have very long maturities, but they are not marketable securities like T-notes, which are traded in the secondary market. Thus, the defining features of T-notes make them the correct answer for this question regarding U.S. government securities that pay semiannual interest with maturities between 1 and 10 years.