[header] How to calculate bond spread [title] Locate bond information. [step] In order to calculate bond yields, you will need information about the price of the bond and the values of its payments. Look for its market price, par value, and details about coupon payments. 
While information is more difficult to find for bonds than for stocks or mutual funds, it can still be located through your broker, online brokerage platform, and through some financial news websites such as yahoo! Finance and bloomberg. [substeps] For coupon payments, look for the coupon rate.