MABS05-AB1

Original Principal Balances of Mortgage Loans

Range ($)	Number of Loans	Aggregate Original Principal Balance	% of Aggregate Principal Balance as of Cut-off Date	AVG CURRENT BALANCE	WA GROSS CPN	WA COMBLTV	WA FICO
50,000.01 - 75,000.00	1	$67,620.00	0.19	$67,620.00	6.875	100.00	710
75,000.01 - 100,000.00	13	$1,162,966.00	3.34	$89,458.92	6.989	93.26	697
100,000.01 - 125,000.00	9	$996,660.00	2.86	$110,740.00	6.871	83.47	709
125,000.01 - 150,000.00	11	$1,516,060.00	4.35	$137,823.64	6.955	89.44	710
150,000.01 - 175,000.00	8	$1,309,427.00	3.76	$163,678.38	6.842	95.75	714
175,000.01 - 200,000.00	8	$1,500,233.00	4.30	$187,529.13	6.729	90.49	712
200,000.01 - 225,000.00	6	$1,295,756.00	3.72	$215,959.33	7.043	77.59	709
225,000.01 - 250,000.00	9	$2,109,205.00	6.05	$234,356.11	6.441	83.73	741
250,000.01 - 275,000.00	3	$804,580.00	2.31	$268,193.33	7.112	86.75	724
275,000.01 - 300,000.00	4	$1,155,224.00	3.31	$288,806.00	6.870	87.27	692
300,000.01 - 333,700.00	5	$1,552,516.00	4.45	$310,503.20	7.245	79.74	669
333,700.01 - 350,000.00	2	$691,880.00	1.99	$345,940.00	6.688	85.13	663
350,000.01 - 600,000.00	26	$11,414,779.32	32.75	$439,029.97	6.836	84.49	708
600,000.01 - 1,000,000.00	9	$7,026,110.00	20.16	$780,678.89	6.740	74.20	687
1,000,000.01 >=	2	$2,249,100.00	6.45	$1,124,550.00	6.635	73.17	668
Total:	116	$34,852,116.32	100.00	$300,449.28	6.817	82.52	701


Principal Balances of Mortgage Loans as of Cutoff Date

Range ($)	Number of Loans	Aggregate Principal Balance as of Cut-off Date	% of Aggregate Principal Balance as of Cut-off Date	AVG CURRENT BALANCE	WA GROSS CPN	WA COMBLTV	WA FICO
50,000.01 - 75,000.00	1	$67,620.00	0.19	$67,620.00	6.875	100.00	710
75,000.01 - 100,000.00	13	$1,162,966.00	3.34	$89,458.92	6.989	93.26	697
100,000.01 - 125,000.00	9	$996,660.00	2.86	$110,740.00	6.871	83.47	709
125,000.01 - 150,000.00	11	$1,515,475.31	4.35	$137,770.48	6.955	89.45	710
150,000.01 - 175,000.00	8	$1,309,427.00	3.76	$163,678.38	6.842	95.75	714
175,000.01 - 200,000.00	8	$1,499,155.00	4.30	$187,394.38	6.729	90.50	712
200,000.01 - 225,000.00	6	$1,295,756.00	3.72	$215,959.33	7.043	77.59	709
225,000.01 - 250,000.00	9	$2,109,205.00	6.05	$234,356.11	6.441	83.73	741
250,000.01 - 275,000.00	3	$804,580.00	2.31	$268,193.33	7.112	86.75	724
275,000.01 - 300,000.00	4	$1,155,224.00	3.32	$288,806.00	6.870	87.27	692
300,000.01 - 333,700.00	5	$1,552,516.00	4.46	$310,503.20	7.245	79.74	669
333,700.01 - 350,000.00	2	$691,880.00	1.99	$345,940.00	6.688	85.13	663
350,000.01 - 600,000.00	26	$11,414,779.32	32.76	$439,029.97	6.836	84.49	708
600,000.01 - 1,000,000.00	9	$7,019,784.70	20.15	$779,976.08	6.740	74.21	687
1,000,000.01 >=	2	$2,248,524.69	6.45	$1,124,262.35	6.635	73.17	668
Total:	116	$34,843,553.02	100.00	$300,375.46	6.817	82.52	701


Current Mortgage Rates of Mortgage Loans

Mortgage Rates (%)	Number of Loans	Aggregate Principal Balance as of Cut-off Date	% of Aggregate Principal Balance as of Cut-off Date	AVG CURRENT BALANCE	WA GROSS CPN	WA COMBLTV	WA FICO
5.500 - 5.999	1	$882,000.00	2.53	$882,000.00	5.875	51.43	703
6.000 - 6.499	27	$9,409,241.00	27.00	$348,490.41	6.226	79.31	714
6.500 - 6.999	44	$11,744,560.70	33.71	$266,921.83	6.650	79.33	691
7.000 - 7.499	24	$7,052,358.32	20.24	$293,848.26	7.216	84.65	699
7.500 - 7.999	16	$4,046,273.00	11.61	$252,892.06	7.647	94.96	688
8.000 - 8.499	4	$1,709,120.00	4.91	$427,280.00	8.099	100.00	726
Total:	116	$34,843,553.02	100.00	$300,375.46	6.817	82.52	701


Original Term to Maturity of Mortgage Loans

Original Term (mos)	Number of Loans	Aggregate Principal Balance as of Cut-off Date	% of Aggregate Principal Balance as of Cut-off Date	AVG CURRENT BALANCE	WA GROSS CPN	WA COMBLTV	WA FICO
360	116	$34,843,553.02	100.00	$300,375.46	6.817	82.52	701
Total:	116	$34,843,553.02	100.00	$300,375.46	6.817	82.52	701

Stated Remaining Term to Maturity of Mortgage Loans
Remaining Term (mos)	Number of Loans	Aggregate Principal Balance as of Cut-off Date	% of Aggregate Principal Balance as of Cut-off Date	AVG CURRENT BALANCE	WA GROSS CPN	WA COMBLTV	WA FICO
300.001 - 360.000	116	$34,843,553.02	100.00	$300,375.46	6.817	82.52	701
Total:	116	$34,843,553.02	100.00	$300,375.46	6.817	82.52	701

Mortgage Insurance	Number of Loans	Aggregate Principal Balance as of Cut-off Date	% of Aggregate Principal Balance as of Cut-off Date	AVG CURRENT BALANCE	WA GROSS CPN	WA COMBLTV	WA FICO
MGIC	1	$173,754.00	0.50	$173,754.00	7.875	90.000	714.000
No MI	115	$34,669,799.02	99.50	$301,476.51	6.812	82.486	700.579
Total:	116	$34,843,553.02	100.00	$300,375.46	6.817	82.52	701


Lien	Number of Loans	Aggregate Principal Balance as of Cut-off Date	% of Aggregate Principal Balance as of Cut-off Date	AVG CURRENT BALANCE	WA GROSS CPN	WA COMBLTV	WA FICO
1st Lien	116	$34,843,553.02	100.00	$300,375.46	6.817	82.52	701
Total:	116	$34,843,553.02	100.00	$300,375.46	6.817	82.52	701


Seasoning(mos)	Number of Loans	Aggregate Principal Balance as of Cut-off Date	% of Aggregate Principal Balance as of Cut-off Date	AVG CURRENT BALANCE	WA GROSS CPN	WA COMBLTV	WA FICO
1	32	$10,806,705.00	31.01	$337,709.53	6.539	76.35	703
2	57	$15,607,663.63	44.79	$273,818.66	7.084	86.89	697
3	20	$4,699,585.70	13.49	$234,979.29	6.928	89.27	693
4	6	$2,847,598.69	8.17	$474,599.78	6.518	80.50	721
7	1	$882,000.00	2.53	$882,000.00	5.875	51.43	703
Total:	116	$34,843,553.02	100.00	$300,375.46	6.817	82.52	701


Combined Loan-to-Value Ratios of Mortgage Loans

Combined LTVs	Number of Loans	Aggregate Principal Balance as of Cut-off Date	% of Aggregate Principal Balance as of Cut-off Date	AVG CURRENT BALANCE	WA GROSS CPN	WA COMBLTV	WA FICO
25.01 - 30.00	1	$122,500.00	0.35	$122,500.00	6.500	27.66	792
35.01 - 40.00	2	$450,800.00	1.29	$225,400.00	6.364	40.00	773
45.01 - 50.00	1	$225,400.00	0.65	$225,400.00	6.250	46.00	766
50.01 - 55.00	2	$1,195,600.00	3.43	$597,800.00	6.105	52.29	691
55.01 - 60.00	5	$1,510,180.00	4.33	$302,036.00	6.479	58.49	724
60.01 - 65.00	5	$3,144,864.70	9.03	$628,972.94	6.822	63.99	643
65.01 - 70.00	4	$1,218,336.00	3.50	$304,584.00	6.235	68.97	717
70.01 - 75.00	8	$3,325,777.00	9.54	$415,722.13	6.661	73.80	703
75.01 - 80.00	17	$5,262,636.63	15.10	$309,566.86	6.782	79.52	707
80.01 - 85.00	5	$2,518,122.69	7.23	$503,624.54	6.337	83.38	686
85.01 - 90.00	11	$3,877,370.00	11.13	$352,488.18	6.867	89.96	705
90.01 - 95.00	8	$2,398,354.00	6.88	$299,794.25	6.861	94.28	702
95.01 - 100.00	47	$9,593,612.00	27.53	$204,119.40	7.239	99.93	707
Total:	116	$34,843,553.02	100.00	$300,375.46	6.817	82.52	701

Owner Occupancy of Mortgage Loans

Owner Occupancy	Number of Loans	Aggregate Principal Balance as of Cut-off Date	% of Aggregate Principal Balance as of Cut-off Date	AVG CURRENT BALANCE	WA GROSS CPN	WA COMBLTV	WA FICO
Primary	93	$27,786,655.02	79.75	$298,781.24	6.801	81.94	696
Investment	16	$5,087,245.00	14.60	$317,952.81	6.738	81.98	720
Second Home	7	$1,969,653.00	5.65	$281,379.00	7.249	92.09	719
Total:	116	$34,843,553.02	100.00	$300,375.46	6.817	82.52	701


Property Type of Mortgage Loans

Property Types	Number of Loans	Aggregate Principal Balance as of Cut-off Date	% of Aggregate Principal Balance as of Cut-off Date	AVG CURRENT BALANCE	WA GROSS CPN	WA COMBLTV	WA FICO
Condomimium	6	$1,175,951.00	3.37	$195,991.83	7.318	96.99	685
Coop	1	$510,825.00	1.47	$510,825.00	6.000	75.00	726
Four Family	2	$712,166.00	2.04	$356,083.00	7.340	86.71	747
High Rise Condo (gt 8 floors)	1	$977,550.00	2.81	$977,550.00	7.250	74.98	668
Pud	19	$5,187,238.00	14.89	$273,012.53	7.341	93.93	700
Pud Detached	3	$674,093.00	1.93	$224,697.67	6.161	94.18	723
Single Family	71	$21,315,384.71	61.17	$300,216.69	6.678	79.44	701
Single Family Attached	2	$216,975.31	0.62	$108,487.66	6.470	87.52	716
Three Family	3	$869,260.00	2.49	$289,753.33	7.644	93.55	718
Two Family	8	$3,204,110.00	9.20	$400,513.75	6.532	76.02	692
Total:	116	$34,843,553.02	100.00	$300,375.46	6.817	82.52	701


Loan Purpose of Mortgage Loans

Loan Purpose	Number of Loans	Aggregate Principal Balance as of Cut-off Date	% of Aggregate Principal Balance as of Cut-off Date	AVG CURRENT BALANCE	WA GROSS CPN	WA COMBLTV	WA FICO
Refinance - Cashout	47	$17,836,637.00	51.19	$379,502.91	6.631	74.71	687
Purchase	60	$15,241,499.32	43.74	$254,024.99	7.040	92.95	715
Refinance - Rate Term	9	$1,765,416.70	5.07	$196,157.41	6.773	71.46	708
Total:	116	$34,843,553.02	100.00	$300,375.46	6.817	82.52	701


Document Type of Mortgage Loans

Document Type	Number of Loans	Aggregate Principal Balance as of Cut-off Date	% of Aggregate Principal Balance as of Cut-off Date	AVG CURRENT BALANCE	WA GROSS CPN	WA COMBLTV	WA FICO
Full / Alternate	11	$2,040,118.31	5.86	$185,465.30	6.671	87.52	708
Stated Income / Verified Assets (Reduced)	17	$3,349,787.00	9.61	$197,046.29	7.175	94.72	693
Stated Income / Stated Assets (SISA)	11	$2,031,687.00	5.83	$184,698.82	7.294	94.28	683
No Ratio / Verified Assets (No Ratio)	6	$2,292,171.00	6.58	$382,028.50	7.517	98.39	718
No Doc	15	$2,802,882.32	8.04	$186,858.82	7.349	93.40	735
Alternate	9	$5,134,134.69	14.73	$570,459.41	6.291	82.42	693
Full	8	$1,757,777.00	5.04	$219,722.13	6.542	86.89	736
No Doc	1	$882,000.00	2.53	$882,000.00	5.875	51.43	703
No Income No Asset	1	$222,950.00	0.64	$222,950.00	6.625	65.00	662
No Ratio	20	$9,204,057.70	26.42	$460,202.89	6.761	68.88	685
Stated Doc	8	$2,203,873.00	6.33	$275,484.13	6.362	80.06	724
Stated Income Full Asset	9	$2,922,115.00	8.39	$324,679.44	7.027	87.12	702
Total:	116	$34,843,553.02	100.00	$300,375.46	6.817	82.52	701


Product Type of Mortgage Loans


Product Type	Number of Loans	Aggregate Principal Balance as of Cut-off Date	% of Aggregate Principal Balance as of Cut-off Date	AVG CURRENT BALANCE	WA GROSS CPN	WA COMBLTV	WA FICO
30YR FXD - 60 MONTH IO	1	$490,000.00	1.41	$490,000.00	6.750	80.00	783
30YR FXD -120 MONTH IO	115	$34,353,553.02	98.59	$298,726.55	6.818	82.56	699


Total:	116	$34,843,553.02	100.00	$300,375.46	6.817	82.52	701

** For ARM loans please break out 2/28, 3/27, 5/25 by percentage
** For IO loans please include length of ammortization term and fixed rate term ( 2yr, 3yr, 5yr, 10yr)


Geographical Distribution of Mortgages Loans


State	Number of Loans	Aggregate Principal Balance as of Cut-off Date	% of Aggregate Principal Balance as of Cut-off Date	AVG CURRENT BALANCE	WA GROSS CPN	WA COMBLTV	WA FICO
New York	25	$11,884,945.70	34.11	$475,397.83	6.651	73.70	681
Florida	14	$3,924,214.00	11.26	$280,301.00	7.022	92.18	696
Arizona	11	$2,400,755.00	6.89	$218,250.45	6.531	80.90	725
Other	66	$16,633,638.32	47.74	$252,024.82	6.929	86.78	712
Total:	116	$34,843,553.02	100.00	$300,375.46	6.817	82.52	701

Prepay Penalty for Mortgage Loans

Prepay Penalty	Number of Loans	Aggregate Principal Balance as of Cut-off Date	% of Aggregate Principal Balance as of Cut-off Date	AVG CURRENT BALANCE	WA GROSS CPN	WA COMBLTV	WA FICO
No Prepay Penalty	33	$9,087,891.39	26.08	$275,390.65	7.025	87.66	703
Prepay Penalty	83	$25,755,661.63	73.92	$310,309.18	6.744	80.71	700
Total:	116	$34,843,553.02	100.00	$300,375.46	6.817	82.52	701


Prepay Term for Mortgage Loans

Prepay Term	Number of Loans	Aggregate Principal Balance as of Cut-off Date	% of Aggregate Principal Balance as of Cut-off Date	AVG CURRENT BALANCE	WA GROSS CPN	WA COMBLTV	WA FICO
0	33	$9,087,891.39	26.08	$275,390.65	7.025	87.66	703
5	1	$289,100.00	0.83	$289,100.00	6.500	79.73	680
12	26	$12,346,285.00	35.43	$474,857.12	6.689	74.51	685
24	2	$784,000.00	2.25	$392,000.00	7.078	87.50	646
36	43	$10,098,397.63	28.98	$234,846.46	6.853	87.16	717
60	11	$2,237,879.00	6.42	$203,443.55	6.468	83.55	712
Total:	116	$34,843,553.02	100.00	$300,375.46	6.817	82.52	701


Fico Scores of Mortgage Loans

Fico Scores	Number of Loans	Aggregate Principal Balance as of Cut-off Date	% of Aggregate Principal Balance as of Cut-off Date	AVG CURRENT BALANCE	WA GROSS CPN	WA COMBLTV	WA FICO
<= 499.999	1	$490,000.00	1.41	$490,000.00	6.750	80.00	0
620.000 - 639.999	3	$2,352,000.00	6.75	$784,000.00	6.936	66.91	631
640.000 - 659.999	19	$4,560,719.70	13.09	$240,037.88	7.008	83.75	652
660.000 - 679.999	19	$6,820,065.00	19.57	$358,950.79	6.773	83.52	670
680.000 - 699.999	14	$4,097,086.00	11.76	$292,649.00	6.874	90.34	687
700.000 - 719.999	17	$5,638,638.69	16.18	$331,684.63	6.598	79.28	711
720.000 - 739.999	16	$3,864,777.00	11.09	$241,548.56	6.609	86.62	730
740.000 - 759.999	11	$2,824,363.31	8.11	$256,760.30	7.303	91.89	748
760.000 - 779.999	8	$2,095,877.00	6.02	$261,984.63	6.660	74.68	773
780.000 - 799.999	6	$1,620,610.32	4.65	$270,101.72	6.958	80.68	788
800.000 +	2	$479,416.00	1.38	$239,708.00	6.250	59.56	807
Total:	116	$34,843,553.02	100.00	$300,375.46	6.817	82.52	701

MORTGAGE ASSET SECURITIZATION TRANSACTIONS INC 8-K