Nominal and effective interest rate
Annual rate is also called as nominal rate, may be 6 monthly, quarterly, monthly or daily. Actual annual rate of interest, called the effective rate or annual percentage rate, it always more than nominal rate.  
Annual percentage rate=[1+r/n)^n -1]*100%  
n= number of equal compounding periods in one year.  
(1+monthly rate)^ 12-1=Annual rate  
The effects of inflation on rate of return  
(1+nominal rate)= (1+ real rate)*(1+inflation rate)  
(1+n)= (1+ r)*(1+i)  
Interest rate is referred to a number of interchangeable terms:  
The time value of money  
Cost of capital  
Discount rate  
Required return |