Drainage networkapp:How to calculate returns for bond funds?

Drainage networkapp:How to calculate returns for bond funds?
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At present, the fund market has a wide variety of categories, and each fund has its own investment strategy and calculation method. To know how the expected annualized return of a fund is calculated, it is necessary to first understand the calculation formula, which is how the expected annualized return of a bond fund is calculated?
The formula for calculating the expected annualized return of bond funds is:
Expected annualized yield of bonds=(Maturity principal and interest-Issue price)÷(Issuance price x repayment period)×100%
Due to the possibility of bondholders transferring bonds during the bond repayment period, the expected annualized yield of bonds can also be divided into the expected annualized yield of the bond seller, the expected annualized yield of the bond buyer, and the expected annualized yield during the bond holding period. The respective calculation formulas are as follows:
　　1)Expected annualized yield of bond sellers=(Selling price-Issue price+Interest during holding period)÷(Issue price x Holding period)×100%
　　2)Expected annualized yield of bond buyers=(Maturity principal and interest-Purchase price)÷(Purchase price x remaining term)×100%
　　3)Expected annualized yield during bond holding period=(Selling price-Purchase price+Interest during holding period)÷(Purchase price x Holding period)×100%