This is the difference between the interest rate on a US Treasury bond and a corporate bond of the same profile$$that is$,$ the same maturity and marketability.$$This is the premium that reflects the risk associated with changes in interest rates for a long$-$term security.$$This is the rate on a Treasury bill or a Treasury bond.$$This is the premium added to the risk$-$free rate that reflects the average sustained increase in the general level of prices for goods and services expected over the security$$s entire life.$$This is the rate for a short$-$term riskless security when inflation is expected to be zero.$$It is based on the bond$$s marketability and trading frequency; the less frequently the security is traded, the higher the premium added, thus increasing the interest rate.$$