Bond funds have relatively low risks and relatively stable income fluctuations, so there is no interval closing price.

when a stock has an interval closing price, a bond fund has a fluctuating spread. Bonds can be held at maturity, repay the principal and interest, and can also be bought and sold in the secondary market like stocks.

bonds are securities issued by debtors, such as governments, enterprises and banks, in order to raise funds, and promise creditors to repay the principal and interest on a specified date. Bond is a kind of financial contract, which is a creditor's right and debt certificate issued to investors when the government, financial institutions, industrial and commercial enterprises directly borrow money from the society and promise to pay interest at a certain interest rate and repay the principal according to the agreed conditions. The essence of bond is the certificate of debt, which has legal effect. There is a creditor-debtor relationship between bond buyers or investors and issuers. Bond issuers are debtors and investors (bond buyers) are creditors. A bond is a valuable security. Because the interest of bonds is usually determined in advance, bonds are a kind of fixed-interest securities (fixed-interest securities). In countries and regions with developed financial markets, bonds can be listed and circulated.