8-K 1 mal02001.txt SEPTEMBER 8K UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington D. C. 20549 Form 8-K Current Report Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): September 25, 2002 MASTR ALTERNATIVE LOAN TRUST Mortgage Pass-Through Certificates, Series 2002-1 Trust (Exact name of registrant as specified in its charter) New York (governing law of 333-75724-09 51-0423827 Pooling and Servicing Agreement) (Commission 51-0423832 (State or other File Number) IRS EIN jurisdiction of Incorporation) c/o Wells Fargo Bank Minnesota, N.A., 9062 Old Annapolis Road Columbia, MD 21045 (Address of principal executive offices) (Zip Code) Registrant's telephone number, including area code: (410) 884-2000 (Former name or former address, if changed since last report) ITEM 5. Other Events On September 25, 2002 a distribution was made to holders of MASTR ALTERNATIVE LOAN TRUST, Mortgage Pass-Through Certificates, Series 2002-1 Trust. ITEM 7. Financial Statements and Exhibits (c) Exhibits furnished in accordance with Item 601(a) of Regulation S-K Exhibit Number Description EX-99.1 Monthly report distributed to holders of Mortgage Pass-Through Certificates, Series 2002-1 Trust, relating to the September 25, 2002 distribution. Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized. MASTR ALTERNATIVE LOAN TRUST Mortgage Pass-Through Certificates, Series 2002-1 Trust By: Wells Fargo Bank Minnesota, N.A., as Master Servicer By: /s/ Beth Belfield, Assistant Vice President By: Beth Belfield, Assistant Vice President Date: 9/25/02 INDEX TO EXHIBITS Exhibit Number Description EX-99.1 Monthly report distributed to holders of Mortgage Pass-Through Certificates, Series 2002-1 Trust, relating to the September 25, 2002 distribution. EX-99.1

MASTR Alternative Loan Trust Mortgage Pass-Through Certificates Record Date: 78/31/02 Distribution Date: 89/2625/02 MAL Series: 2002-1 Contact: Customer Service - CTSLink Wells Fargo Bank Minnesota, N.A. Securities Administration Services 7485 New Horizon Way Frederick, MD 21703 Telephone: (301) 815-6600 Fax: (301) 815-6660 Certificateholder Distribution Summary Certificate Certificate Beginning Class Pass-Through Certificate Interest Principal Class CUSIP Description Rate Balance Distribution Distribution A-1 576434AA2 SEQ 2.~~45000~~41000% 26,~~826~~491,~~100~~719.0094 5453,~~769~~204.9520 ~~334~~124,~~380~~885.0648 A-2 576434AB0 IO 6.~~55000~~59000% 0.00 ~~146~~145,~~425~~483.8070 0.00 A-3 576434AC8 SEQ 6.50000% ~~204~~201,~~957~~948,~~900~~479.0046 1,~~110~~093,~~188~~887.6360 31,~~009~~123,~~420~~969.5434 A-4 576434AD6 SEQ 6.50000% 10,827,000.00 58,646.25 0.00 A-5 576434AE4 SEQ 6.50000% 25,650,000.00 138,937.50 0.00 APO 576434AF1 PO 0.00000% ~~761~~760,~~319~~582.0917 0.00 ~~736~~754.9265 A-R 576434AG9 SEQ 6.75000% 500.00 0.2800 500.00 A-LR 576434AM6 SEQ 6.75000% 500.00 0.2800 500.00 AX 576434AH7 IO 6.75000% 0.00 9594,~~285~~035.7275 0.00 B-1 576434AJ3 SUB 6.75000% 8,~~563~~556,~~000~~310.0033 48,~~166~~129.8825 6,~~689~~742.6761 B-2 576434AK0 SUB 6.75000% 2,~~997~~994,~~000~~658.0065 16,~~858~~844.1395 2,~~341~~359.3588 B-3 576434AL8 SUB 6.75000% 1,~~998~~996,~~000~~439.0010 11,~~238~~229.7597 1,~~560~~573.9025 B-4 576434AN4 SUB 6.75000% ~~999~~998,~~000~~219.0055 5,~~619~~614.3898 ~~780~~786.4563 B-5 576434AP9 SUB 6.75000% ~~856~~855,~~000~~331.0027 4,~~815~~811.0024 ~~668~~674.7303 B-6 576434AQ7 SUB 6.75000% ~~999~~998,~~513~~732.3146 5,~~622~~617.2687 ~~780~~787.8503 Totals ~~285~~282,~~434~~077,~~932~~472.4093 1,~~696~~676,~~574~~443.8126 31,~~357~~262,~~459~~532.4790

Certificateholder Distribution Summary (continued) Current Ending Cumulative Realized Certificate Total Realized Class Loss Balance Distribution Losses A-1 0.00 26,~~491~~366,~~719~~834.9446 ~~389~~178,~~150~~089.0168 0.00 A-2 0.00 0.00 ~~146~~145,~~425~~483.8070 0.00 A-3 0.00 ~~201~~200,~~948~~824,~~479~~510.4612 42,~~119~~217,~~609~~856.1794 0.00 A-4 0.00 10,827,000.00 58,646.25 0.00 A-5 0.00 25,650,000.00 138,937.50 0.00 APO 0.00 ~~760~~759,~~582~~827.1752 ~~736~~754.9265 0.00 A-R 0.00 0.00 500.2800 0.00 A-LR 0.00 0.00 500.2800 0.00 AX 0.00 0.00 9594,~~285~~035.7275 0.00 B-1 0.00 8,~~556~~549,~~310~~567.3371 54,~~856~~871.5586 0.00 B-2 0.00 2,~~994~~992,~~658~~298.6578 19,~~199~~204.4883 0.00 B-3 0.00 1,~~996~~994,~~439~~865.1085 12,~~799~~803.6522 0.00 B-4 0.00 ~~998~~997,~~219~~432.5593 6,~~399~~401.8361 0.00 B-5 0.00 ~~855~~854,~~331~~657.2724 5,~~483~~485.7327 0.00 B-6 0.00 ~~998~~997,~~732~~945.4643 6,~~403~~404.1190 0.00 Totals 0.00 ~~282~~280,~~077~~814,~~472~~940.9304 52,~~054~~938,~~034~~976.2816 0.00 All distributions required by the Pooling and Servicing Agreement have been calculated by the Certificate Administrator on behalf of the Trustee.

Principal Distribution Statement Original Beginning Scheduled Unscheduled Face Certificate Principal Principal Realized Class Amount Balance Distribution Distribution Accretion Loss (1) A-1 26,826,100.00 26,~~826~~491,~~100~~719.0094 20,~~956~~876.7322 ~~313~~104,~~423~~009.3326 0.00 0.00 A-2 0.00 0.00 0.00 0.00 0.00 0.00 A-3 204,957,900.00 ~~204~~201,~~957~~948,~~900~~479.0046 ~~188~~187,~~610~~886.5902 2936,~~820,809~~083.9433 0.00 0.00 A-4 10,827,000.00 10,827,000.00 0.00 0.00 0.00 0.00 A-5 25,650,000.00 25,650,000.00 0.00 0.00 0.00 0.00 APO 761,319.09 ~~761~~760,~~319~~582.0917 ~~666~~670.7388 7083.1977 0.00 0.00 A-R 50.00 500.00 30.1300 460.8700 0.00 0.00 A-LR 50.00 500.00 30.1300 460.8700 0.00 0.00 AX 0.00 0.00 0.00 0.00 0.00 0.00 B-1 8,563,000.00 8,~~563~~556,~~000~~310.0033 6,~~689~~742.6761 0.00 0.00 0.00 B-2 2,997,000.00 2,~~997~~994,~~000~~658.0065 2,~~341~~359.3588 0.00 0.00 0.00 B-3 1,998,000.00 1,~~998~~996,~~000~~439.0010 1,~~560~~573.9025 0.00 0.00 0.00 B-4 999,000.00 ~~999~~998,~~000~~219.0055 ~~780~~786.4563 0.00 0.00 0.00 B-5 856,000.00 ~~856~~855,~~000~~331.0027 ~~668~~674.7303 0.00 0.00 0.00 B-6 999,513.31 ~~999~~998,~~513~~732.3146 ~~780~~787.8503 0.00 0.00 0.00 Totals 285,434,932.40 ~~285~~282,~~434~~077,~~932~~472.4093 ~~223~~222,~~062~~356.2655 31,~~134~~040,~~397~~176.2036 0.00 0.00 (1) Amount Does Not Include Excess Special Hazard, Bankruptcy, or Fraud Losses Unless Otherwise Disclosed. Please Refer to the Prospectus Supplement for a Full Description.

Principal Distribution Statement (continued) Total Ending Ending Total Principal Certificate Certificate Principal Class Reduction Balance Percentage Distribution A-1 ~~334~~124,~~380~~885.0648 26,~~491~~366,~~719~~834.9446 0.~~98753527~~98287990 ~~334~~124,~~380~~885.0648 A-2 0.00 0.00 0.00000000 0.00 A-3 31,~~009~~123,~~420~~969.5434 ~~201~~200,~~948~~824,~~479~~510.4612 0.~~98531688~~97983298 31,~~009~~123,~~420~~969.5434 A-4 0.00 10,827,000.00 1.00000000 0.00 A-5 0.00 25,650,000.00 1.00000000 0.00 APO ~~736~~754.9265 ~~760~~759,~~582~~827.1752 0.~~99903205~~99804081 ~~736~~754.9265 A-R 500.00 0.00 0.00000000 500.00 A-LR 500.00 0.00 0.00000000 500.00 AX 0.00 0.00 0.00000000 0.00 B-1 6,~~689~~742.6761 8,~~556~~549,~~310~~567.3371 0.~~99921877~~99843136 6,~~689~~742.6761 B-2 2,~~341~~359.3588 2,~~994~~992,~~658~~298.6578 0.~~99921877~~99843136 2,~~341~~359.3588 B-3 1,~~560~~573.9025 1,~~996~~994,~~439~~865.1085 0.~~99921877~~99843136 1,~~560~~573.9025 B-4 ~~780~~786.4563 ~~998~~997,~~219~~432.5593 0.~~99921877~~99843136 ~~780~~786.4563 B-5 ~~668~~674.7303 ~~855~~854,~~331~~657.2724 0.~~99921877~~99843136 ~~668~~674.7303 B-6 ~~780~~787.8503 ~~998~~997,~~732~~945.4643 0.~~99921877~~99843136 ~~780~~787.8503 Totals 31,~~357~~262,~~459~~532.4790 ~~282~~280,~~077~~814,~~472~~940.9304 0.~~98823739~~98381420 31,~~357~~262,~~459~~532.4790

Principal Distribution Factors Statement Original Beginning Scheduled Unscheduled Face Certificate Principal Principal Class (2) Amount Balance Distribution Distribution Accretion A-1 26,826,100.00 ~~1000~~987.~~00000000~~53527125 0.~~78120674~~77820555 113.~~68352202~~87716664 0.00000000 A-2 0.00 0.00000000 0.00000000 0.00000000 0.00000000 A-3 204,957,900.00 ~~1000~~985.~~00000000~~31688439 0.~~92024064~~91670543 134.~~76287491~~56719809 0.00000000 A-4 10,827,000.00 1000.00000000 0.00000000 0.00000000 0.00000000 A-5 25,650,000.00 1000.00000000 0.00000000 0.00000000 0.00000000 APO 761,319.09 ~~1000~~999.~~00000000~~03204844 0.~~87575631~~88120738 0.~~09219524~~11003271 0.00000000 A-R 50.00 ~~1000~~0.00000000 620.~~60000000~~00000000 ~~937~~0.~~40000000~~00000000 0.00000000 A-LR 50.00 ~~1000~~0.00000000 620.~~60000000~~00000000 ~~937~~0.~~40000000~~00000000 0.00000000 AX 0.00 0.00000000 0.00000000 0.00000000 0.00000000 B-1 8,563,000.00 ~~1000~~999.~~00000000~~21877029 0.~~78122971~~78741212 0.00000000 0.00000000 B-2 2,997,000.00 ~~1000~~999.~~00000000~~21876877 0.~~78123123~~78741408 0.00000000 0.00000000 B-3 1,998,000.00 ~~1000~~999.~~00000000~~21876877 0.~~78123123~~78741241 0.00000000 0.00000000 B-4 999,000.00 ~~1000~~999.~~00000000~~21876877 0.~~78123123~~78741742 0.00000000 0.00000000 B-5 856,000.00 ~~1000~~999.~~00000000~~21877336 0.~~78122664~~78741822 0.00000000 0.00000000 B-6 999,513.31 ~~1000~~999.~~00000000~~21876978 0.~~78123022~~78741323 0.00000000 0.00000000 (2) All classes are per $1,000 denomination.

Principal Distribution Factors Statement (continued) Total Ending Ending Total Realized Principal Certificate Certificate Principal Class Loss (3) Reduction Balance Percentage Distribution A-1 0.00000000 124.~~46472875~~65537219 ~~987~~982.~~53527125~~87989905 0.~~98753527~~98287990 124.~~46472875~~65537219 A-2 0.00000000 0.00000000 0.00000000 0.00000000 0.00000000 A-3 0.00000000 145.~~68311561~~48390347 ~~985~~979.~~31688439~~83298092 0.~~98531688~~97983298 145.~~68311561~~48390347 A-4 0.00000000 0.00000000 1,000.00000000 1.00000000 0.00000000 A-5 0.00000000 0.00000000 1,000.00000000 1.00000000 0.00000000 APO 0.00000000 0.~~96795156~~99124009 ~~999~~998.~~03204844~~04080836 0.~~99903205~~99804081 0.~~96795156~~99124009 A-R 0.00000000 ~~1,000~~0.00000000 0.00000000 0.00000000 ~~1,000~~0.00000000 A-LR 0.00000000 ~~1,000~~0.00000000 0.00000000 0.00000000 ~~1,000~~0.00000000 AX 0.00000000 0.00000000 0.00000000 0.00000000 0.00000000 B-1 0.00000000 0.~~78122971~~78741212 ~~999~~998.~~21877029~~43135700 0.~~99921877~~99843136 0.~~78122971~~78741212 B-2 0.00000000 0.~~78123123~~78741408 ~~999~~998.~~21876877~~43135802 0.~~99921877~~99843136 0.~~78123123~~78741408 B-3 0.00000000 0.~~78123123~~78741241 ~~999~~998.~~21876877~~43135636 0.~~99921877~~99843136 0.~~78123123~~78741241 B-4 0.00000000 0.~~78123123~~78741742 ~~999~~998.~~21876877~~43136136 0.~~99921877~~99843136 0.~~78123123~~78741742 B-5 0.00000000 0.~~78122664~~78741822 ~~999~~998.~~21877336~~43135514 0.~~99921877~~99843136 0.~~78122664~~78741822 B-6 0.00000000 0.~~78123022~~78741323 ~~999~~998.~~21876978~~43135656 0.~~99921877~~99843136 0.~~78123022~~78741323 (3) Amount Does Not Include Excess Special Hazard, Bankrupcy, or Fraud Losses Unless Otherwise Disclosed. Please Refer to the Prospectus Supplement for a Full Description.

Interest Distribution Statement Beginning Payment of Original Current Certificate/ Current Unpaid Current Face Certificate Notional Accrued Interest Interest Class Amount Rate Balance Interest Shortfall Shortfall A-1 26,826,100.00 2.~~45000~~41000% 26,~~826~~491,~~100~~719.0094 5453,~~769~~204.9520 0.00 0.00 A-2 0.00 6.~~55000~~59000% 26,~~826~~491,~~100~~719.0094 ~~146~~145,~~425~~483.8070 0.00 0.00 A-3 204,957,900.00 6.50000% ~~204~~201,~~957~~948,~~900~~479.0046 1,~~110~~093,~~188~~887.6360 0.00 0.00 A-4 10,827,000.00 6.50000% 10,827,000.00 58,646.25 0.00 0.00 A-5 25,650,000.00 6.50000% 25,650,000.00 138,937.50 0.00 0.00 APO 761,319.09 0.00000% ~~761~~760,~~319~~582.0917 0.00 0.00 0.00 A-R 50.00 6.75000% 500.00 0.2800 0.00 0.00 A-LR 50.00 6.75000% 500.00 0.2800 0.00 0.00 AX 0.00 6.75000% 16,~~939~~717,~~684~~466.3159 9594,~~285~~035.7275 0.00 0.00 B-1 8,563,000.00 6.75000% 8,~~563~~556,~~000~~310.0033 48,~~166~~129.8825 0.00 0.00 B-2 2,997,000.00 6.75000% 2,~~997~~994,~~000~~658.0065 16,~~858~~844.1395 0.00 0.00 B-3 1,998,000.00 6.75000% 1,~~998~~996,~~000~~439.0010 11,~~238~~229.7597 0.00 0.00 B-4 999,000.00 6.75000% ~~999~~998,~~000~~219.0055 5,~~619~~614.3898 0.00 0.00 B-5 856,000.00 6.75000% ~~856~~855,~~000~~331.0027 4,~~815~~811.0024 0.00 0.00 B-6 999,513.31 6.75000% ~~999~~998,~~513~~732.3146 5,~~622~~617.2687 0.00 0.00 Totals 285,434,932.40 1,~~696~~676,~~574~~443.8126 0.00 0.00

Interest Distribution Statement (continued) Remaining Ending Non-Supported Total Unpaid Certificate/ Interest Realized Interest Interest Notional Class Shortfall Losses (4) Distribution Shortfall Balance A-1 0.00 0.00 5453,~~769~~204.9520 0.00 26,~~491~~366,~~719~~834.9446 A-2 0.00 0.00 ~~146~~145,~~425~~483.8070 0.00 26,~~491~~366,~~719~~834.9446 A-3 0.00 0.00 1,~~110~~093,~~188~~887.6360 0.00 ~~201~~200,~~948~~824,~~479~~510.4612 A-4 0.00 0.00 58,646.25 0.00 10,827,000.00 A-5 0.00 0.00 138,937.50 0.00 25,650,000.00 APO 0.00 0.00 0.00 0.00 ~~760~~759,~~582~~827.1752 A-R 0.00 0.00 0.2800 0.00 0.00 A-LR 0.00 0.00 0.2800 0.00 0.00 AX 0.00 0.00 9594,~~285~~035.7275 0.00 16,~~719~~609,~~401~~994.7260 B-1 0.00 0.00 48,~~166~~129.8825 0.00 8,~~556~~549,~~310~~567.3371 B-2 0.00 0.00 16,~~858~~844.1395 0.00 2,~~994~~992,~~658~~298.6578 B-3 0.00 0.00 11,~~238~~229.7597 0.00 1,~~996~~994,~~439~~865.1085 B-4 0.00 0.00 5,~~619~~614.3898 0.00 ~~998~~997,~~219~~432.5593 B-5 0.00 0.00 4,~~815~~811.0024 0.00 ~~855~~854,~~331~~657.2724 B-6 0.00 0.00 5,~~622~~617.2687 0.00 ~~998~~997,~~732~~945.4643 Totals 0.00 0.00 1,~~696~~676,~~574~~443.8126 0.00 (4) Amount Does Not Include Excess Special Hazard, Bankrupcy, or Fraud Losses Unless Otherwise Disclosed. Please Refer to the Prospectus Supplement for a Full Description.

Interest Distribution Factors Statement Beginning Payment of Original Current Certificate/ Current Unpaid Current Face Certificate Notional Accrued Interest Interest Class (5) Amount Rate Balance Interest Shortfall Shortfall A-1 26,826,100.00 2.~~45000~~41000% ~~1000~~987.~~00000000~~53527125 21.~~04166651~~98329985 0.00000000 0.00000000 A-2 0.00 6.~~55000~~59000% ~~1000~~987.~~00000000~~53527125 5.~~45833349~~42321471 0.00000000 0.00000000 A-3 204,957,900.00 6.50000% ~~1000~~985.~~00000000~~31688439 5.~~41666669~~33713314 0.00000000 0.00000000 A-4 10,827,000.00 6.50000% 1000.00000000 5.41666667 0.00000000 0.00000000 A-5 25,650,000.00 6.50000% 1000.00000000 5.41666667 0.00000000 0.00000000 APO 761,319.09 0.00000% ~~1000~~999.~~00000000~~03204844 0.00000000 0.00000000 0.00000000 A-R 50.00 6.75000% ~~1000~~0.00000000 50.~~60000000~~00000000 0.00000000 0.00000000 A-LR 50.00 6.75000% ~~1000~~0.00000000 50.~~60000000~~00000000 0.00000000 0.00000000 AX 0.00 6.75000% ~~1000~~986.~~00000000~~88182637 5.~~62499975~~55121030 0.00000000 0.00000000 B-1 8,563,000.00 6.75000% ~~1000~~999.~~00000000~~21877029 5.~~62500058~~62060610 0.00000000 0.00000000 B-2 2,997,000.00 6.75000% ~~1000~~999.~~00000000~~21876877 5.~~62500167~~62060394 0.00000000 0.00000000 B-3 1,998,000.00 6.75000% ~~1000~~999.~~00000000~~21876877 5.~~62500000~~62060561 0.00000000 0.00000000 B-4 999,000.00 6.75000% ~~1000~~999.~~00000000~~21876877 5.~~62500501~~62060060 0.00000000 0.00000000 B-5 856,000.00 6.75000% ~~1000~~999.~~00000000~~21877336 5.~~62500000~~62060748 0.00000000 0.00000000 B-6 999,513.31 6.75000% ~~1000~~999.~~00000000~~21876978 5.~~62499763~~62060549 0.00000000 0.00000000 (5) All classes are per $1,000 denomination.

Interest Distribution Factors Statement (continued) Remaining Ending Non-Supported Total Unpaid Certificate/ Interest Realized Interest Interest Notional Class Shortfall Losses (6) Distribution Shortfall Balance A-1 0.00000000 0.00000000 21.~~04166651~~98329985 0.00000000 ~~987~~982.~~53527125~~87989905 A-2 0.00000000 0.00000000 5.~~45833349~~42321471 0.00000000 ~~987~~982.~~53527125~~87989905 A-3 0.00000000 0.00000000 5.~~41666669~~33713314 0.00000000 ~~985~~979.~~31688439~~83298092 A-4 0.00000000 0.00000000 5.41666667 0.00000000 1000.00000000 A-5 0.00000000 0.00000000 5.41666667 0.00000000 1000.00000000 APO 0.00000000 0.00000000 0.00000000 0.00000000 ~~999~~998.~~03204844~~04080836 A-R 0.00000000 0.00000000 50.~~60000000~~00000000 0.00000000 0.00000000 A-LR 0.00000000 0.00000000 50.~~60000000~~00000000 0.00000000 0.00000000 AX 0.00000000 0.00000000 5.~~62499975~~55121030 0.00000000 ~~986~~980.~~99606286~~53743482 B-1 0.00000000 0.00000000 5.~~62500058~~62060610 0.00000000 ~~999~~998.~~21877029~~43135700 B-2 0.00000000 0.00000000 5.~~62500167~~62060394 0.00000000 ~~999~~998.~~21876877~~43135802 B-3 0.00000000 0.00000000 5.~~62500000~~62060561 0.00000000 ~~999~~998.~~21876877~~43135636 B-4 0.00000000 0.00000000 5.~~62500501~~62060060 0.00000000 ~~999~~998.~~21876877~~43136136 B-5 0.00000000 0.00000000 5.~~62500000~~62060748 0.00000000 ~~999~~998.~~21877336~~43135514 B-6 0.00000000 0.00000000 5.~~62499763~~62060549 0.00000000 ~~999~~998.~~21876978~~43135656 (6) Amount Does Not Include Excess Special Hazard, Bankrupcy,or Fraud Losses Unless Otherwise Disclosed. Please Refer to the Prospectus Supplement for a Full Description.

CERTIFICATEHOLDER ACCOUNT STATEMENT CERTIFICATE ACCOUNT Beginning Balance 0.00 Deposits Payments of Interest and Principal 52,~~086~~947,~~545~~608.4601 Liquidations, Insurance Proceeds, Reserve Funds 0.00 Proceeds from Repurchased Loans 0.00 Other Amounts (Servicer Advances) 2650,~~954~~134.25 Realized Losses 0.00 Prepayment Penalties 0.00 Total Deposits 52,~~113~~997,~~499~~742.7126 Withdrawals Reimbursement for Servicer Advances 0.00 Payment of Service Fee 5958,~~465~~766.4310 Payment of Interest and Principal 52,~~054~~938,~~034~~976.2816 Total Withdrawals (Pool Distribution Amount) 52,~~113~~997,~~499~~742.7126 Ending Balance 0.00

SERVICING FEES Gross Servicing Fee 5958,~~465~~766.4310 Supported Prepayment/Curtailment Interest Shortfall 0.00 Net Servicing Fee 5958,~~465~~766.4310

LOAN STATUS STRATIFICATION/CREDIT ENHANCEMENT STATEMENT DELINQUENCY STATUS DELINQUENT BANKRUPTCY FORECLOSURE REO Total No of Loans No of Loans No of Loans No of Loans No of Loans Principal Balance Principal Balance Principal Balance Principal Balance Principal Balance 0-29 Days 0 0 0 0 0.00 0.00 0.00 0.00 30 Days 1525 0 0 0 1525 37,~~905~~203,~~308~~638.5728 0.00 0.00 0.00 37,~~905~~203,~~308~~638.5728 60 Days 01 0 0 0 01 0154,256.0049 0.00 0.00 0.00 0154,256.0049 90 Days 0 0 0 0 0 0.00 0.00 0.00 0.00 0.00 120 Days 0 0 0 0 0 0.00 0.00 0.00 0.00 0.00 150 Days 0 0 0 0 0 0.00 0.00 0.00 0.00 0.00 180+ Days 0 0 0 0 0 0.00 0.00 0.00 0.00 0.00 Totals 1526 0 0 0 1526 37,~~905~~357,~~308~~894.5777 0.00 0.00 0.00 37,~~905~~357,~~308~~894.5777 No of Loans No of Loans No of Loans No of Loans No of Loans Principal Balance Principal Balance Principal Balance Principal Balance Principal Balance 0-29 Days 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 30 Days 12.~~367366~~291476% 0.000000% 0.000000% 0.000000% 12.~~367366~~291476% 12.~~383624~~563756% 0.000000% 0.000000% 0.000000% 12.~~383624~~563756% 60 Days 0.~~000000~~091659% 0.000000% 0.000000% 0.000000% 0.~~000000~~091659% 0.~~000000~~054899% 0.000000% 0.000000% 0.000000% 0.~~000000~~054899% 90 Days 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 120 Days 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 150 Days 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 180+ Days 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% Totals 12.~~367366~~383135% 0.000000% 0.000000% 0.000000% 12.~~367366~~383135% 12.~~383624~~618655% 0.000000% 0.000000% 0.000000% 12.~~383624~~618655%

OTHER INFORMATION Current Period Class A Insufficient Funds 0.00 Principal Balance of Contaminated Properties 0.00 Periodic Advance 2650,~~954~~134.25

SUBORDINATION LEVEL/CLASS PERCENTAGE AND PREPAYMENT PERCENTAGE Current Original $ Original % Current $ Current % Class% Prepayment% Class A 17,173,832.40 6.01672411% 17,~~160~~146,~~273~~595.5346 6.~~08353207~~10601254% 94.~~170385~~148735% 100.000000% Class B-1 7,849,513.31 2.75001845% 7,~~843~~837,~~381~~200.0323 2.~~78057689~~79087723% 3.~~041520~~052816% 0.000000% Class B-2 4,852,513.31 1.70004185% 4,~~848~~844,~~722~~901.3845 1.~~71893286~~72530046% 1.~~064514~~068468% 0.000000% Class B-3 2,854,513.31 1.00005745% 2,~~852~~850,~~283~~035.2860 1.~~01117018~~01491594% 0.~~709676~~712312% 0.000000% Class B-4 1,855,513.31 0.65006525% 1,~~854~~852,~~063~~602.7367 0.~~65728883~~65972368% 0.~~354838~~356156% 0.000000% Class B-5 999,513.31 0.35017203% ~~998~~997,~~732~~945.4643 0.~~35406318~~35537476% 0.~~304045~~305175% 0.000000% Class B-6 0.00 0.00000000% 0.00 0.00000000% 0.~~355020~~356339% 0.000000% Please Refer to the Prospectus Supplement for a Full Description of Loss Exposure

CREDIT ENHANCEMENT Original $ Original % Current $ Current % Bankruptcy 107,000.00 0.03748665% 107,000.00 0.~~03793284~~03810339% Fraud 107,000.00 0.03748665% 107,000.00 0.~~03793284~~03810339% Special Hazard 2,997,717.00 1.05022780% 2,997,717.00 1.~~06272825~~06750624% Limit of Subordinate's Exposure to Certain Types of Losses

COLLATERAL STATEMENT Collateral Description Fixed 30 Year Ratio Strip Weighted Average Gross Coupon 7.~~382588~~381842% Weighted Average Pass-Through Rate 7.~~132588~~131842% Weighted Average Maturity(Stepdown Calculation ) ~~356~~355 Beginning Scheduled Collateral Loan Count 1,~~106~~097 Number Of Loans Paid In Full 96 Ending Scheduled Collateral Loan Count 1,~~097~~091 Beginning Scheduled Collateral Balance ~~285~~282,~~434~~077,~~932~~472.4094 Ending Scheduled Collateral Balance ~~282~~280,~~077~~814,~~472~~940.9404 Ending Actual Collateral Balance at 31-~~Jul~~Aug-2002 ~~282~~280,~~252~~979,~~141~~870.7168 Monthly P &I Constant 1,~~979~~957,~~102~~565.6899 Special Servicing Fee 0.00 Prepayment Penalties 0.00 Realized Loss Amount 0.00 Cumulative Realized Loss 0.00 Class A Optimal Amount 42,~~948~~833,~~155~~049.0083 Class AP Deferred Amount 0.00 Ending Scheduled Balance for Premium Loans ~~282~~280,~~077~~814,~~472~~940.9404 Scheduled Principal ~~223~~222,~~062~~356.2754 Unscheduled Principal 31,~~134~~040,~~397~~176.1936

Miscellaneous Reporting Senior Percentage 94.~~234621~~170385% Junior Percentage 5.~~765379~~829615% Senior Prepayment Percentage 100.000000%

Filing Compare · MORTGAGE ASSET SEC TRANSACTIONS INC MASTR ALT LN TR 2002 1