Treasury Bond Fund.

The securities investment fund you mentioned, whose main investment object is treasury bonds, is usually called a treasury bond fund.

Treasury bond funds are a very stable investment fund that mainly invests in low-risk, highly liquid securities such as Treasury bonds.

Treasury funds typically offer lower yields but also carry less risk.

Because Treasury funds invest primarily in bonds issued by governments, their default risk is minimal.

In addition, Treasury bond funds are also relatively liquid and can be converted into cash at any time.

Treasury bond funds are suitable for investors who want to obtain stable income while avoiding high risks.

However, the yields of Treasury bond funds may be affected by fluctuations in the national bond market, so investors need to consider carefully when choosing Treasury bond funds.