In: Finance
We have following equation to calculate the nominal interest rate
NI =RI + IP + DP + MP + LP
Where,
NI = Nominal interest rate or required return or current yield
RI = real risk free rate of return
IP = Inflation premium
MP = maturity risk premium
DP = default risk premium
LP = Liquidity premium
Other important consideration in nominal interest rate calculations:
· In the case of T-bills; it is exposed to inflation risk only, therefore only inflation premium (IP) over the real risk free rate is applicable (maturity of T-bills are one year or less so no maturity risk and there is no default risk and liquidity risk because of sovereign guarantee). To calculate the current yield on T-bills; our equation will become
NI = RI + IP
· In the case of a T-bond; there is only inflation risk and maturity risk (there is no default risk and liquidity risk because of sovereign guarantee), therefore equation become
NI = RI + IP + MP
Maturity risk premium associated with the maturity of the bond therefore maturity time is a factor in calculating the maturity risk premium
· In the case of a corporate bond; there are inflation risk, default risk, maturity risk and liquidity risk, therefore equation become
NI = RI + IP + DP + MP +LP