Annual income of pure debt fund = (net value at the end of the year-net value at the beginning of the year) * fund share handling fee. For example, if the fund's net value at the beginning of the year is 1.2 1, its net value at the end of the year is 1.92, and it holds 1000 copies, then the annual income of the fund can be calculated as (1.92-

Pure debt funds mainly invest in bonds, and the fund income is determined by the bonds invested. Bond yield = bond price+bond interest.