What is the effective annual rate if a bank charges you 8.25 percent compounded quarterly?
a. 8.42%
b. 8.32%
c. 8.51%
d. 8.91%
Solution:
The formula for calculating the Effective annual rate is
EAR = [ [ 1 + ( r / n) ] n ] -1
Where
r = rate of interest charged ;
n = No. of compounding periods in one year = 12 / Compounding
period ;
As per the information given in the question we have
r = 8.25 % = 0.0825 ; compounding period = 3 months ( since compounding is quarterly ) ;
n = 12 / 3 = 4 ;
Applying the above information in the formula we have
= [ [ 1 + ( 0.0825 / 4 ) ] 4 ] - 1
= [ 1 + 0.020625 ] 4 - 1
= [ 1.020625 ] 4 - 1
= 1.085088 – 1
= 0.085088
= 8.5088 %
= 8.51 % ( when rounded off to two decimal places )
Thus the effective annual rate = 8.51 %
The solution is c. 8.51 %
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