But bonds also pay out interest on a regular basis, so you’ll also want to consider the yield of a bond fund. Most funds display the 30-day annualized yield for their portfolio, which is the average yield of all bonds it holds over the past 30 days. That yield may increase or decrease based on the market.
Importantly, some bonds’ interest payments are exempt from federal taxation and others are exempt from state taxes; some may be exempt from both. As such, you may want to calculate the tax-equivalent yield, which considers the required yield if the taxable gains were equivalent to the tax-free yield. This will vary depending on the investor’s state and income.
Putting it all together, you can calculate the total return of a bond fund. Total return considers interest payments and changes in NAV over a set period. This is the best measure of bond fund performance, especially since they’re often used for income generation and not capital appreciation.