Module 4 Flashcards
Compounding
The process of interest being earned on increasing sums of principal and interest over time.
Carlos received $13,000 from an inheritance, and he wants to invest it for the next 11 years. If he can earn 7.5% annually after tax, how much will his account be worth at the end of 11 years?
The account is worth $28,803, with keystrokes as follows:
END mode
1, DOWNSHIFT, P/YR
DOWNSHIFT, C ALL
13,000, +/–, PV
11, N
7.5, I/YR
Solve for FV = 28,802.9160 or $28,803
Annuity
If the payments are equal and regular, the series of savings deposits or payments is called (in time value of money language) an annuity.
Future Value of an Annuity
The accumulation of funds needed to meet a future financial goal.
Annuity Due
If each of the payments are made at the beginning of each period (e.g., as with lease payments), the series of payments is known as an annuity due.
Ordinary Annuity
If each payment is made at the end of each period (e.g., as with mortgage payments), the series is known as an ordinary annuity.
Hector has been investing $2,000 at the end of each year for the past 18 years in a growth mutual fund. How much is the fund worth now assuming he has earned 10% compounded annually on his investment?
The fund is worth $91,198, with keystrokes as follows:
END mode (just take off BEG mode as the calculator is pre-programed to be in END mode)
1, DOWNSHIFT, P/YR
DOWNSHIFT, C ALL
2,000, +/–, PMT (Note: This is a cash outflow from the client; therefore, enter it as a negative amount.)
10, I/YR
18, N
Solve for FV = 91,198.3463, or $91,198
With respect to calculator entry, whenever you are solving for the future value (FV) of an annuity, which key must be used?
The payment (PMT) key.
As with the FV process, the PV of a single amount depends on the:
length of time before the single amount will be received and
annual (or some other time period, such as monthly [×12], semiannually [×2], or quarterly [×4]) interest rate or rate of return.
Kali needs a total of $100,000 in 10 years to pay for four years of college for her granddaughter. If she can earn 7.5% annually after tax on her growth mutual fund set aside for this purpose, what single amount must Kali invest today?
Kali needs to invest $48,519, with keystrokes as follows:
END mode
1, DOWNSHIFT, P/YR
DOWNSHIFT, C ALL
100,000, FV
10, N
7.5, I/YR
Solve for PV = −48,519.3928, or $48,519 (Note: The HP10bII/ HP10bII+ calculator will return a negative number in this case. The negative sign displayed before the PV amount indicates that this investment is a cash outflow to Kali.)
Nick’s grandmother plans on giving him $5,000 at the end of each year for the next five years. Assuming a discount rate of 4%, what is the PV of this sum?
The PV is $22,259, with keystrokes as follows:
END mode
1, DOWNSHIFT, P/YR
DOWNSHIFT, C ALL
5,000, +/−, PMT
4, I/YR
5, N
Solve for PV = 22,259.1117, or $22,259
Nick’s grandmother plans on giving him $5,000 at the beginning of each year for the next five years. Assuming a discount rate of 4%, what is the PV of this sum?
The PV is $23,149, with the keystrokes as follows:
BEG mode
1, DOWNSHIFT, P/YR
DOWNSHIFT, C ALL
5,000 PMT
4 I/YR
5 N
Solve for PV = 23,149.4761, or $23,149
Halia invests $1,000 today with the hope that in five years her investment will be worth $1,500. The investment will compound semiannually. At the end of five years, what will be the rate of return?
The I/YR is 8.28%, with keystrokes follows:
END mode
2, DOWNSHIFT, P/YR
DOWNSHIFT, C ALL
1,000, +/–, PV
1,500, FV
5, DOWNSHIFT, xP/YR (10 should appear on display)
Solve for I/YR = 8.2760, or 8.28%
If you change P/YR to an amount other than 1 (annual), you should:
enter the number of years, followed by “DOWNSHIFT, xP/YR”.
Rule of 72
To calculate the number of years for an investment to double in value, simply divide 72 by the annual interest rate. For example, if the client’s objective is to double a $1,000 investment that is earning a compound annual rate of return of 9%, it will take approximately eight years (72 ÷ 9 = 8). Alternatively, if the investor wants to double his original investment in 10 years, divide 72 by 10 to derive an approximate required annual interest rate of 7.2%.
Angela has an IRA with a current balance of $4,000. How many years will it take for this account to grow to $20,000 at a 12% annual rate of return?
The answer is 14.2 years with keystrokes as follows:
END mode
1, DOWNSHIFT, P/YR
DOWNSHIFT, C ALL
4,000, +/−, PV
20,000, FV
12, I/YR
Solve for N = 14.2015, or 14.2 years
Erica and Tyler would like to accumulate $50,000 for a down payment on a new home. If they are able to save $500 at the end of each month and these funds earn 10% per year, how many years will it take for the couple to accumulate the needed $50,000?
The answer is 6.09 years with keystrokes as follows:
END mode
12, DOWNSHIFT, P/YR
DOWNSHIFT, C ALL
50,000, FV
500, +/−, PMT
10, I/YR
Solve for N = 73.0389 months, or 73.03 ÷ 12 = 6.09 years
Fixed (equal) Payments
Unchanging payments over the entire period.
Serial Payments
Payments increase each year by the amount of inflation (to maintain a constant or real dollar amount).
Amul purchases a new car and finances $21,000 with a 5.9% loan over three years. Assuming each payment is due at the end of the month, what is the amount of Amul’s monthly car payment?
Amul’s car payment is $637.91, with keystrokes as follows:
END mode
12, DOWNSHIFT, P/YR
DOWNSHIFT, C ALL
21,000, PV
5.9, I/YR
3, DOWNSHIFT, xP/YR (36 should appear on display)
Solve for PMT = −637.9096, or $637.91 (Note: Because the PMT is a cash outflow for Amul, it is displayed as a negative number.)
Loan amortizations (e.g., mortgages, auto loans) are calculated using what mode?
END mode because the interest on the principal balance is accruing from payment to payment on the balance of the debt.
Amortization
Refers to the repayment of loan principal over time.
Amortization Schedule
Refers to how much principal and how much interest is being repaid with each payment.
Sarah and Sean have finalized a $135,000, 30-year loan with a 4.5% interest rate. What are the keystrokes for the mortgage amortization calculation?
END mode
12, DOWNSHIFT, P/YR
DOWNSHIFT, C ALL
135,000, PV
4.5, I/YR
30, DOWNSHIFT, xP/YR (360 should appear on display)
Solve for PMT = −684.0252, or $684.03