MOODY'S RATES MASTR ALTERNATIVE LOAN TRUST 2004-3 MORTGAGE PASS-THROUGH CERTIFICATES Aaa
Approximately $466.6 Million of Mortgage-Backed Securities Rated
New York, April 19, 2004 -- Moody's Investors Service has assigned ratings of Aaa, Aa3,
A3, and Baa3 to certain classes of investor certificates of MASTR
Alternative Loan Trust 2004-3. Mortgage Asset Securitization
Transactions Inc. was the depositor of mortgage pools from different
originators. The pool groups were divided into two with separate
subordinate certificates.
The ratings of the group 1, group 2, group 3, and group
4 certificates are based on the expected performance of the mortgages,
the 5.90% credit enhancement provided by subordination of
the mezzanine and subordinate certificates, and the structural and
legal protections in the transaction. The ratings of the group
5, group 6, group 7 and group 8 certificates are based on
the expected performance of the mortgages, the 6.50%
credit enhancement provided by subordination of the mezzanine and subordinate
certificates, and the structural and legal protections in the transaction.
The rating of the mezzanine and subordinate certificates are based on
the subordination of the respective junior classes. The certificates
are secured by "Alternative A" 15- year and 30-year fixed-rate
mortgages originated by a number of different originators.
The groups 1 through 4 mortgages have positive pool characteristics that
include a good FICO score of 716, 2-4 family homes that comprise
33% of the pool, and investor properties that comprise the
entire pool. The loan-to- value ratio of 66.5%
is strong and was a factor in assessing loss frequency and loss severity.
Investor property and 2-4 family home performance could be more
volatile than owner-occupied single family homes.
The groups 5-8 mortgages have positive pool characteristics that
include an average Alt-A scores of 701, 2-4 family
homes that comprise 12% of the pool, and investor properties
that comprise the 1.8% of the pool. The loan-to-
value ratio of 81.5% is weaker than the average Alt-A
pool and was a factor in assessing loss frequency and loss severity.
Investor property and 2-4 family home performance could be more
volatile than owner-occupied single family homes.
The complete rating actions are as follows:
Issuer: MASTR Alternate Loan Trust 2003-4
Class 1-A-I, $50,048,000,
Senior P&I, Aaa
Class 2-A-1, $69,905,000,
Senior P&I, rated Aaa
Class 3-A-1, $39,948,000,
Senior P&I, rated Aaa
Class 4-A-1, $42,130,000,
Senior P&I, rated Aaa
Class 5-A-1, $54,599,000,
Senior P&I, rated Aaa
Class 6-A-1, $49,511,000,
Senior P&I, rated Aaa
Class 7-A-1, $58,856,000,
Senior P&I, rated Aaa
Class 8-A-1, $84,127,000,
Senior P&I, rated Aaa
Class 15-PO, $4,219,397, Senior
PO, Principal Only, rated Aaa
Class 30-PO, $3,509,283, Senior,
rated Aaa
Class 15-A-X, IO, rated Aaa
Class 30-AX-1, IO, rated Aaa
Class 30-AX-2, IO, rated Aaa
Class B-I-1, $6,175,000,
Subordinate P&I, rated Aa3
Class B-I-2, $2,167,000,
Subordinate P&I, rated A3
Class B-I-3, $1,409,000,
Subordinate P&I, rated Baa3
CitiMortgage, Inc. (30%), National City Mortgage
Co. (25%), GreenPoint Mortgage Funding Co.
(12%), and other will service the portfolio. Wells
Fargo Bank N.A. will act as master servicer.
Mortgage Asset Securitization Transactions, Inc. (MAST) is
a Delaware corporation established for acquiring mortgage loans and acting
as depositor. MAST is an indirect wholly-owned subsidiary
of UBS Securities LLC. MASTR Alternative Loan Trust 2004-3
is a REMIC established for acquiring mortgage loans and issuing the certificates.
Additional research is available on http://www.moodys.com
New York
Jay A. Siegel
Managing Director
Structured Finance Group
Moody's Investors Service
JOURNALISTS: 212-553-0376
SUBSCRIBERS: 212-553-1653
New York
Bruce D. Fabrikant
Senior Vice President
Structured Finance Group
Moody's Investors Service
JOURNALISTS: 212-553-0376
SUBSCRIBERS: 212-553-1653