Question
Suppose you were offered a choice between a 30-year mortgage at 6% with zero points or a 5.5% mortgage with 2 discount points. Assume you
- Suppose you were offered a choice between a 30-year mortgage at 6% with zero points or a 5.5% mortgage with 2 discount points. Assume you want to borrow $200,000. How many months will you have to live in the house to make it worthwhile to take the 5.5% mortgage with the 2 points?
- Given two mortgage options: 1) 30-year fixed at 6% with zero points, and 2) 30-year fixed at 5.5% with points. Assume a $200,000 mortgage. If you intend to live in your house for 10 years, what is the maximum amount of points that you would be willing to pay?
- a) Compute the monthly payment on a $300,000 30-year mortgage at a rate of 5%. b) What is the first monthly principal payment in (a)?
- c) What is the first monthly interest payment in (a)?
- Again, assume you have a 300,000 30-year mortgage at a rate of 5%. a) What are the total principal payments for first year?
- b) What are the total interest payments for the first year?
- Now assume you have a 300,000 15-year mortgage at a rate of 4.5%. a) What are the total principal payments for the first year?
- b) What are the total interest payments for the first year?
- Given the amortization schedule in the table below, compute the weighted average life.
Time
Principal
1
5
2
10
3
20
4
40
5
80
Total
155
7. Given the below single month mortality rates for a mortgage security. What are the corresponding conditional prepayment rates?
Age
SMM
CPR
5
0.6
(a)
6
1.0
(b)
7
2.0
(c)
8
5.0
(d)
- Given the below par-yield curve, what is the spot curve?
- Suppose you have a 8.5% coupon paying mortgage bond. Given the information in question 8 above, suppose the weighted average life is 2.25. What is the WAL yield spread to par?
- Suppose you have a 8.5% coupon paying mortgage bond. Given the information in question 8 above, and the below bond cash flows, what is the yield curve spread to the spot curve?
- Given the information in question 8, what are the 1-year forward rates based upon the spot curve?
- Given the cash flows from question 10 and the 1-year forward rates in question 11, what is the yield curve spread when using the forward rates?
- Compute the effective durations and effective convexities of the securities in the below table.
Year
1
2
3
4
5
Par Curve
3.0%
5.0%
8.0%
9.0%
9.5%
Spot Curve
(a)
(b)
(c)
(d)
(e)
Year
Cash Flow
1
39.50
2
31.65
3
24.28
4
17.38
5
10.98
Year
1
2
3
4
5
1-Year Forward Rates
(a)
(b)
(c)
(d)
Bond 1
Bond 2
Bond 3
-50 bp
55.83
105.19
23.03
Base
45.00
104.22
26.75
+ 50 bp
36.38
103.03
29.92
Effective Duration
(a)
(b)
(c)
Effective Convexity
(d)
(e)
(f)
14. Using the calculated durations and convexities in question 13, what would be the new prices of Bonds 1, 2 and 3 if interest rates rose by 25 basis points?
Bond 1
Bond 2
Bond 3
Price + 25 bp
(a)
(b)
(c)
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