Annual yield is interest rate
As a result, there are no 20-year rates available for the time period January 1, 1987 through September 30, 1993. Treasury Yield Curve Rates: These rates are commonly referred to as "Constant Maturity Treasury" rates, or CMTs. Yields are interpolated by the Treasury from the daily yield curve. Earned annual interest (EAR) is another definition of how an annual percentage yield (APY) is earned. An annual percentage rate (APR) represents the annual rate charged for earning or borrowing money.