In: Finance
I am trying to start saving for retirement. I am investing all my cash into the S&P 500, which will assume consistently 9.8% interest, compounded annually. I initially put a lump sum of $100 into my account, and I will deposit $10 every second week.
a) After 10 years, how much money will I have invested?
b) After 10 years, if I sold all of my stocks, how much money will I have in my account?
c) After 25 years, how much money have I invested?
d) If I had not sold my stocks at the 10 year mark and instead held onto them an additional 15 years before selling, how much additional money would I have in my account?
(a)
Assuming there are 52.1429 weeks in a year
Total lump sum investment =$100
Total weeks in 10 years = 10*52.1429 = 521.429 weeks
$10 deposits take place every second week
Total 2-weekly deposits over 10 years = $10 * 521.429/2 = $2607.145
Total money invested in 10 years = lump sum investment + Total 2-weekly deposits
Total money invested in 10 years = $100+$2607.145 = $2707.145
(b)
We use a financial calculator function FV for this. We input the following
PV = -100 (lump-sum investment)
PMT = -10 ( 2-weekly deposits)
N = 521.429/2 ( Total number of 2-weekly deposits over 10 years)
I/Y = 9.8/(54.1429/2) = 0.362005 ( Compounding is done every 2-weeks and 9.8% is the annual rate)
CPT FV, we get
FV = $4580.65
Hence, after 10 years $4580.65 will be there in the account
(c)
Assuming there are 52.1429 weeks in a year
Total lump sum investment =$100
Total weeks in 25years = 25*52.1429 = 1303.5725 weeks
$10 deposits take place every second week
Total 2-weekly deposits over 25 years = $10 * 1303.5725 /2 = $6517.8625
Total money invested in 25years = lump sum investment + Total 2-weekly deposits
Total money invested in 25 years = $100+$6517.8625= $6617.8625
(d)
Case 1: If he stops investing for additional 15 years
Value of stock at 10-year mark = $4580.65
Total Value of $4580.65 after additional 15 years = 4580.65* (1+0.098)^15
Total value of $4580.65 after additional 15 years = $ 18619.2511
Additional money = Total Value of $4580.65 after additional 15 years - Value of stock at 10-year mark
Additional money = $ 18619.2511 - $4580.65 = $14,038.601
Case 2: He keeps on investing for an additional 15 years
We find the FV after 15 additional years or total of 25 years
PV = -100 (lump-sum investment)
PMT = -10 ( 2-weekly deposits)
N = 1303.5725 /2 ( Total number of 2-weekly deposits over 10 years)
I/Y = 9.8/(54.1429/2) = 0.362005 ( Compounding is done every 2-weeks and 9.8% is the annual rate)
CPT FV, we get
FV after 25 years= $27409.060
Additional money = Total Value of after 25 years( including additional investments) - Value of stock at the 10-year mark
Additional money =$27409.060 - $4580.65 = $22,828.41