Security Group 2
PSA Prepayment Assumption Rates
Class YI
Distribution Date
0%
125%
250%
375%
500%
Initial Percent .................. 100
100
100
100
100
December 2008................ 100
100
100
100
100
December 2009................ 100
100
100
100
100
December 2010................ 100
100
100
100
100
December 2011................ 100
100
100
100
100
December 2012................ 100
100
100
100
100
December 2013................ 100
100
100
100
94
December 2014................ 100
100
100
100
59
December 2015................ 100
100
100
93
34
December 2016................ 100
98
98
66
23
December 2017................ 100
91
91
43
16
December 2018................ 100
67
67
30
11
December 2019................ 100
48
48
23
7
December 2020................ 100
34
34
17
5
December 2021................ 100
27
27
13
3
December 2022................ 100
21
21
10
2
December 2023................ 100
17
17
7
2
December 2024................ 100
13
13
5
1
December 2025................ 100
10
10
4
1
December 2026................ 100
8
8
3
0
December 2027................
99
6
6
2
0
December 2028................
91
4
4
1
0
December 2029................
55
3
3
1
0
December 2030................
25
2
2
1
0
December 2031................
2
2
2
0
0
December 2032................
1
1
1
0
0
December 2033................
1
1
1
0
0
December 2034................
0
0
0
0
0
December 2035................
0
0
0
0
0
December 2036................
0
0
0
0
0
December 2037................
0
0
0
0
0
Weighted Average
Life (years) .................. 22.3
13.0
13.0
10.7
8.1
Yield Considerations
An investor seeking to maximize yield should make a decision whether to invest in any
Class based on the anticipated yield of that Class resulting from its purchase price, the
investor's own projection of Mortgage Loan prepayment rates under a variety of scenarios, in the
case of the Group 2 Securities, the investor's own projection of principal payment rates on the
Underlying Certificates under a variety of scenarios, and, in the case of a Floating Rate or
Inverse Floating Rate Class, the investor's own projection of levels of LIBOR under a variety of
scenarios. No representation is made regarding Mortgage Loan prepayment rates,
Underlying Certificate payment rates, LIBOR levels or the yield of any Class.
Prepayments: Effect on Yields
The yields to investors will be sensitive in varying degrees to the rate of prepayments on
the related Mortgage Loans.
• In the case of Regular Securities or MX Securities purchased at a premium (especially
Interest Only Classes), faster than anticipated rates of principal payments could result in
actual yields to investors that are lower than the anticipated yields.
• Investors in the Interest Only Classes should also consider the risk that rapid rates of
principal payments could result in the failure of investors to recover fully their
investments.
• In the case of Regular Securities or MX Securities purchased at a discount (especially
Principal Only Classes), slower than anticipated rates of principal payments could result
in actual yields to investors that are lower than the anticipated yields.
See "Risk Factors – Rates of principal payments can reduce your yield" in this
Supplement.
S-29