In: Finance
Eleni contributed $150.00 every three months into an RRSP for 10 years. What nominal annual rate of interest will the RRSP earn if the balance in Eleni's account just after she made her last contribution was $ 10, 000.00 ? The nominal annual rate of interest is % compounded quarterly.
Amount deposited quarterly | 150 | |||||||
Time = 10 Years it means total quarters 10*4 = | 40 | |||||||
Future value of Amount deposited= | 10000 | |||||||
Future value of annuity = P * { (1+r)^n - 1 } / r | ||||||||
10000 = 150 * Cumulative p.V.f. at rate of interest for 40 periods | ||||||||
Cumulative p.V.f. at rate of interest for 40 periods | 66.66667 | |||||||
Assume, rate is 4%, C.P.V.F. = | 95.02552 | |||||||
Assume, rate is 2%, C.P.V.F. = | 60.40198 | |||||||
It means rate is between 4 and 2. | ||||||||
Quarterly rate = 4 -( 2 * (95.02552-66.66667) /(95.02552 - 60.40198)) | ||||||||
4 - | 1.638 | |||||||
2.36 | or 0.024 | |||||||
P.V.F. @ 2.40 for 40 periods = | 65.92708 | |||||||
P.V.F. @ 2.45% for 40 periods = | 66.6599 | |||||||
So, Quarterly interest rate is 2.45% | ||||||||
Nominal annual rate of interest compounded quarterly = 2.45 *4 = | 9.80% | |||||||
Note : We have performed trial and error method for finding exact rate of interest. | ||||||||
Cumulative pvf formula = 150 * (((1+0.0245)^40)-1)/0.0245 | ||||||||