About: Par yield

In finance, par yield (or par value yield) is the yield on a fixed income security assuming that its market price is equal to par value (also known as face value or nominal value). Par yield is used to derive the U.S. Treasury’s daily official “Treasury Par Yield Curve Rates”, which are used by investors to price debt securities traded in public markets, and by lenders to set interest rates on many other types of debt, including bank loans and mortgages.