US bond yield is the return an investor realizes on a bond issued by the US government. It is the effective annual interest rate that the US government pays on one of its debt obligations, expressed as a percentage. The yield can be calculated as a simple coupon yield or using a more complex method like yield to maturity. The yield on a bond is its return expressed as an annual percentage, affected in large part by the price the buyer pays for it. The higher the price paid for a bond, the lower the yield, and vice versa. The yield on US government bonds of different maturities is published daily on the US Treasury website. The yield on US government bonds is an important indicator of the health of the US economy and is closely watched by investors and policymakers.