国债是中央财政为满足预算需要而代表中央政府发行的国家公债。它是当中央财政预算出现支出大于收入（即财政赤字）时，以信用方式进行的一种融资活动。国债是一种政府债券，其本金和利息的支付均以政府的全部信誉作为担保，因此具有高度的安全性。国债也是一种有价证券，国债? Treasury bonds are the national treasury bonds issued by the central government on behalf of the central government to meet budgetary needs. It is a kind of financing activity carried out by credit when the expenditure in the central budget exceeds the income (that is, the fiscal deficit). Treasury bonds are a kind of government bonds. Their principal and interest payments are guaranteed by the entire credibility of the government. Therefore, they are highly secure. Bonds is also a securities, treasury bonds?