The annual gain or loss earned on an investment, generally expressed as a percent. To determine the yield on a bond, divide the amount of interest received from the bond by the amount paid for the bond. For example, suppose an individual paid $5,000 for a bond. At 5% interest, he/she would earn $250 annually in interest income. The yield, $5,000 divided by $250, would be 5%. Similarly, to determine the yield on stocks, divide the dividend received per share by the amount paid per share.