Class Project (1/97)
Investment banks have structured securities collateralized by 100 year corporate
bonds. Discuss the mechanics and logic of refinancing century bonds via special
purpose corporations. What are the sources of value in this type of transaction?
Your analysis should include a detailed case study of an actual
transaction. One example of this type of transaction is the Series
1997-USW-2
TRUST. Your report should be as detailed and
rigorous as possible. Build a spreadsheet to support and illustrate
your conclusions.
PROBLEM I
You have a pool of fixed-rate mortgages with a WAC = 8.75%. Investors in MBS are not interested in receiving a fixed-rate Pass-Through (PT), so you create a Floater corresponding to 92% of the pool, with a coupon rate (Cf) = Libor + 65 bp.Servicing is .30% per year;
Cost of Credit Enhancement is .20% per year.
A) Based on the above, you must create an Inverse Floater corresponding to what percentage of the underlying pool?
B) What is the maximum coupon rate (Cif) you can pay on the Inverse Floater?
C) At what coupon rate (Cf) must the Floater be capped?/ (Floor and Ceiling)
PROBLEM II
You have a $40 Million pool of mortgages with a WAC = 10% and a WAM =30. You will create CMOs with 5 Tranches:
Tranche A = 20%, and a coupon rate = 8%
Tranche B = 25%, and a coupon rate = 8.25%
Tranche C = 25%, and a coupon rate = 8.50%
Tranche D = 25%, and a coupon rate = 8.75%
Z Tranche = 5%, with an accrual coupon rate = 9%.
Graph the cash flows of each tranche over time under the following scenarios:
cpr = 0%
cpr = 5%
cpr = 15%
cpr = 30%
Tufts University
The Fletcher School of Law and Diplomacy
Securitization
Anne Zissu and Charles A. Stone
Zfinance@interserv.com
Option 1:
1) Diagram GMAC's SWIFT securitization program.
a) The diagram should show all entities involved in the transaction and a brief description of their roles.
b) Your diagram of the scheme should show the flow of funds as well as the transfer of assets.
c) You should briefly discuss the capital structure of the SWIFT Trust and the composition of its assets.
2) Compare the value to GMAC of raising funds through its MTN program relative to financing assets through its SWIFT securitization program. If you can not quantify the value the MTN program to the securitization program discuss factors that you can not quantify and how they affect the relative value of securitization.
3) Diagram CETELEM'S MasterNoria securitization program. Discuss Cetelem's use f the program and compare Cetelem's cost of funding assets through the MasterNoria program to on balance sheet financing.
Option 2:
1) Diagram and analyze the securitization of sovereign debt by SACE (Sezione Speciale per l'Assicurazione del Credito all'Esportazione) via Optimum Finance B.V. What is was the motivation of the securitization. What value did SACE realize from this securitization. Have similar securitization transactions been structured?
The answers to option 1 or option 2 should not take more than 7 pages including diagrams.
Question 4 is mandatory.
4)
A pool of mortgages is securitized. You have the following information:
mo = number of mortgages in the pool at time zero;
Bo = balance of mortgage at time zero;
r = mortgage rate;
n = number of years over ehich the mortgage amortizes;
s = servicing fee as a percentage of outstanding pool;
g = cost of credit enhancement as a percentage of outstanding pool;
y = market rate (discount rate);
cpr = annual constant prepayment rate;
mbs = mortgage-backed security;
PT(t) = pass-through at time t;
IO(t) = interest only at time t;
PO(t) = principal only at time t;
mo = 100
Bo = $100,000
r = 10%
n = 30
(assume mortgage payments are made at the end of each year)
s = .25%
g = .25%
There are 4 possible scenarios:
| Scenarios | y | cpr | PT | IO | PO |
| 1 | 6.5% | 40% | |||
| 2 | 8% | 25% | |||
| 3 | 9.5% | 15% | |||
| 4 | 11% | 0% |
I. Estimate PT(1) to PT(30) under the 4 scenarios, and graph them over time.
II. Estimate IO(1) to IO(30) under the 4 scenarios and graph them over time.
III. Estimate PO(1) to PO(30) under the 4 scenarios and graph them over time.
IV. What causes PT(1) to PT(30) to increases over time when cpr = 0?
IV. Price PT, IO and PO under the 4 scenarios and place your results in Table I.
V. What causes the price of PT to be exactly equal to $10 million when y = 9.5%?
VI. You created a portfolio made of Bonds and IOs with the characteristics from above. Over what range is the portfolio hedged against interest rate risk. At what market rate (y), the value of the IO starts to decrease?
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