8-K 1 mam03004.txt DECEMBER 8-K 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): December 26, 2003 MASTR ADJUSTABLE RATE MORTGAGES TRUST Mortgage Pass-Through Certificates, Series 2003-4 Trust (Exact name of registrant as specified in its charter) New York (governing law of 333-106982-04 54-2126389 Pooling and Servicing Agreement) (Commission 54-2126390 (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 December 26, 2003 a distribution was made to holders of MASTR ADJUSTABLE RATE MORTGAGES TRUST, Mortgage Pass-Through Certificates, Series 2003-4 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 2003-4 Trust, relating to the December 26, 2003 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 ADJUSTABLE RATE MORTGAGES TRUST Mortgage Pass-Through Certificates, Series 2003-4 Trust By: Wells Fargo Bank Minnesota, N.A. as Master Servicer By: /s/ Beth Belfield as Assistant Vice President By: Beth Belfield as Assistant Vice President Date: 12/30/03 INDEX TO EXHIBITS Exhibit Number Description EX-99.1 Monthly report distributed to holders of Mortgage Pass-Through Certificates, Series 2003-4 Trust, relating to the December 26, 2003 distribution. EX-99.1

Mortgage Asset Securitization Transactions, Inc Mortgage Pass-Through Certificates Record Date: 911/30/03 Distribution Date: 1012/2726/03 MARM Series: 2003-4 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 1-A-1 576433EQ5 SEN 4.~~47261~~47144% 7877,~~739~~802,~~000~~101.0018 ~~293~~289,~~473~~905.8295 241,~~086~~062,225.4765 2-A-1 576433ER3 SEN 4.~~44365~~44170% 104,~~537~~153,~~000~~113.0070 ~~387~~385,~~104~~514.8213 2736,~~841~~994.4504 3-A-1 576433ES1 SEN 4.~~97639~~96874% ~~181~~179,~~505~~335,~~000~~976.0071 ~~752~~742,~~699~~561.6276 ~~729~~745,~~585~~803.0529 B-1 576433EU6 SUB 4.~~71494~~71035% 11,~~060~~055,~~000~~282.0065 43,~~455~~395.9922 2,~~351~~374.4092 B-2 576433EV4 SUB 4.~~71494~~71035% 4,~~463~~461,~~000~~096.0042 17,~~535~~511.6311 ~~948~~958.8534 B-3 576433EW2 SUB 4.~~71494~~71035% 3,~~298~~296,~~000~~593.0032 12,~~958~~940.2209 ~~701~~708.1718 B-4 576433EX0 SUB 4.~~71494~~71035% 1,~~746~~745,~~000~~255.0029 6,~~860~~850.2364 ~~371~~374.2192 B-5 576433EY8 SUB 4.~~71494~~71035% 1,~~164~~163,~~000~~503.0053 4,~~573~~567.4909 ~~247~~249.4795 B-6 576433EZ5 SUB 4.~~71494~~71035% 1,~~553~~552,~~435~~772.0042 6,~~103~~095.6209 ~~330~~333.2757 A-R 576433ET9 SEN 4.~~47261~~47287% ~~100~~0.00 10.1400 ~~100~~0.00 Totals ~~388~~384,~~065~~565,~~535~~695.0022 1,~~524~~509,~~766~~341.5808 ~~786~~1,~~563~~850,022.3486

Certificateholder Distribution Summary (continued) Current Ending Cumulative Realized Certificate Total Realized Class Loss Balance Distribution Losses 1-A-1 0.00 7876,~~714~~739,~~913~~875.53 ~~317~~1,~~560~~352,131.2960 0.00 2-A-1 0.00 104,~~509~~116,~~158~~119.5565 ~~414~~422,~~946~~508.2717 0.00 3-A-1 0.00 ~~180~~178,~~775~~590,~~414~~173.9541 1,~~482~~488,~~284~~365.6705 0.00 B-1 0.00 11,~~057~~052,~~648~~907.6073 45,~~807~~770.3914 0.00 B-2 0.00 4,~~462~~460,~~051~~138.1508 18,~~484~~469.4845 0.00 B-3 0.00 3,~~297~~295,~~298~~885.8314 13,~~659~~648.3927 0.00 B-4 0.00 1,~~745~~744,~~628~~880.7937 7,~~231~~225.4456 0.00 B-5 0.00 1,163,~~752~~253.5358 4,~~820~~817.9604 0.00 B-6 0.00 1,~~553~~552,~~104~~438.7385 6,~~433~~428.8966 0.00 A-R 0.00 0.00 ~~101~~0.1400 0.00 Totals 0.00 ~~387~~382,~~278~~715,~~971~~672.6634 23,~~311~~359,~~329~~363.9294 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) 1-A-1 78,739,000.00 7877,~~739~~802,~~000~~101.0018 16,~~886~~738.1409 71,~~200~~045,487.3356 0.00 0.00 2-A-1 104,537,000.00 104,~~537~~153,~~000~~113.0070 19,~~333~~509.4291 817,~~508~~484.0313 0.00 0.00 3-A-1 181,505,000.00 ~~181~~179,~~505~~335,~~000~~976.0071 41,~~264~~341.1267 ~~688~~704,~~320~~461.9362 0.00 0.00 B-1 11,060,000.00 11,~~060~~055,~~000~~282.0065 2,~~351~~374.4092 0.00 0.00 0.00 B-2 4,463,000.00 4,~~463~~461,~~000~~096.0042 ~~948~~958.8534 0.00 0.00 0.00 B-3 3,298,000.00 3,~~298~~296,~~000~~593.0032 ~~701~~708.1718 0.00 0.00 0.00 B-4 1,746,000.00 1,~~746~~745,~~000~~255.0029 ~~371~~374.2192 0.00 0.00 0.00 B-5 1,164,000.00 1,~~164~~163,~~000~~503.0053 ~~247~~249.4795 0.00 0.00 0.00 B-6 1,553,435.00 1,~~553~~552,~~435~~772.0042 ~~330~~333.2757 0.00 0.00 0.00 A-R 100.00 ~~100~~0.00 700.1100 290.8900 0.00 0.00 Totals 388,065,535.00 ~~388~~384,~~065~~565,~~535~~695.0022 82,~~504~~589.1655 ~~704~~1,~~059~~767,433.1831 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 1-A-1 241,~~086~~062,225.4765 7876,~~714~~739,~~913~~875.53 0.~~99969410~~97461075 241,~~086~~062,225.4765 2-A-1 2736,~~841~~994.4504 104,~~509~~116,~~158~~119.5565 0.~~99973367~~99597386 2736,~~841~~994.4504 3-A-1 ~~729~~745,~~585~~803.0529 ~~180~~178,~~775~~590,~~414~~173.9541 0.~~99598036~~98394079 ~~729~~745,~~585~~803.0529 B-1 2,~~351~~374.4092 11,~~057~~052,~~648~~907.6073 0.~~99978740~~99935875 2,~~351~~374.4092 B-2 ~~948~~958.8534 4,~~462~~460,~~051~~138.1508 0.~~99978740~~99935875 ~~948~~958.8534 B-3 ~~701~~708.1718 3,~~297~~295,~~298~~885.8314 0.~~99978740~~99935874 ~~701~~708.1718 B-4 ~~371~~374.2192 1,~~745~~744,~~628~~880.7937 0.~~99978739~~99935875 ~~371~~374.2192 B-5 ~~247~~249.4795 1,163,~~752~~253.5358 0.~~99978740~~99935875 ~~247~~249.4795 B-6 ~~330~~333.2757 1,~~553~~552,~~104~~438.7385 0.~~99978739~~99935874 ~~330~~333.2757 A-R ~~100~~0.00 0.00 0.00000000 ~~100~~0.00 Totals ~~786~~1,~~563~~850,022.3486 ~~387~~382,~~278~~715,~~971~~672.6634 0.~~99797312~~98621402 ~~786~~1,~~563~~850,022.3486

Principal Distribution Factors Statement Original Beginning Scheduled Unscheduled Face Certificate Principal Principal Class (2) Amount Balance Distribution Distribution Accretion 1-A-1 78,739,000.00 ~~1000~~988.~~00000000~~10121007 0.~~21445713~~21257687 013.~~09144554~~27788720 0.00000000 2-A-1 104,537,000.00 ~~1000~~996.~~00000000~~32774711 0.~~18494332~~18663162 0.~~08138774~~16725303 0.00000000 3-A-1 181,505,000.00 ~~1000~~988.~~00000000~~04978766 0.~~22734426~~22777152 3.~~79229735~~88122432 0.00000000 B-1 11,060,000.00 ~~1000~~999.~~00000000~~57347649 0.~~21260398~~21473056 0.00000000 0.00000000 B-2 4,463,000.00 ~~1000~~999.~~00000000~~57347524 0.~~21260363~~21473000 0.00000000 0.00000000 B-3 3,298,000.00 ~~1000~~999.~~00000000~~57347483 0.~~21260461~~21473014 0.00000000 0.00000000 B-4 1,746,000.00 ~~1000~~999.~~00000000~~57347652 0.~~21260596~~21473081 0.00000000 0.00000000 B-5 1,164,000.00 ~~1000~~999.~~00000000~~57347938 0.~~21260309~~21473368 0.00000000 0.00000000 B-6 1,553,435.00 ~~1000~~999.~~00000000~~57347427 0.~~21260626~~21473058 0.00000000 0.00000000 A-R 100.00 ~~1000~~0.00000000 ~~701~~0.~~10000000~~00000000 ~~298~~0.~~90000000~~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 1-A-1 0.00000000 013.~~30590267~~49046406 ~~999~~974.~~69409733~~61074601 0.~~99969410~~97461075 013.~~30590267~~49046406 2-A-1 0.00000000 0.~~26633106~~35388465 ~~999~~995.~~73366894~~97386236 0.~~99973367~~99597386 0.~~26633106~~35388465 3-A-1 0.00000000 4.~~01964161~~10899584 ~~995~~983.~~98035839~~94079177 0.~~99598036~~98394079 4.~~01964161~~10899584 B-1 0.00000000 0.~~21260398~~21473056 999.~~78739602~~35874593 0.~~99978740~~99935875 0.~~21260398~~21473056 B-2 0.00000000 0.~~21260363~~21473000 999.~~78739637~~35874524 0.~~99978740~~99935875 0.~~21260363~~21473000 B-3 0.00000000 0.~~21260461~~21473014 999.~~78739539~~35874469 0.~~99978740~~99935874 0.~~21260461~~21473014 B-4 0.00000000 0.~~21260596~~21473081 999.~~78739404~~35874570 0.~~99978739~~99935875 0.~~21260596~~21473081 B-5 0.00000000 0.~~21260309~~21473368 999.~~78739691~~35874570 0.~~99978740~~99935875 0.~~21260309~~21473368 B-6 0.00000000 0.~~21260626~~21473058 999.~~78739374~~35874369 0.~~99978739~~99935874 0.~~21260626~~21473058 A-R 0.00000000 ~~1,000~~0.00000000 0.00000000 0.00000000 ~~1,000~~0.00000000 (3) Amount Does Not Include Excess Special Hazard, Bankruptcy, 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 1-A-1 78,739,000.00 4.~~47261~~47144% 7877,~~739~~802,~~000~~101.0018 ~~293~~289,~~473~~905.8295 0.00 0.00 2-A-1 104,537,000.00 4.~~44365~~44170% 104,~~537~~153,~~000~~113.0070 ~~387~~385,~~104~~514.8213 0.00 0.00 3-A-1 181,505,000.00 4.~~97639~~96874% ~~181~~179,~~505~~335,~~000~~976.0071 ~~752~~742,~~699~~561.6276 0.00 0.00 B-1 11,060,000.00 4.~~71494~~71035% 11,~~060~~055,~~000~~282.0065 43,~~455~~395.9922 0.00 0.00 B-2 4,463,000.00 4.~~71494~~71035% 4,~~463~~461,~~000~~096.0042 17,~~535~~511.6311 0.00 0.00 B-3 3,298,000.00 4.~~71494~~71035% 3,~~298~~296,~~000~~593.0032 12,~~958~~940.2209 0.00 0.00 B-4 1,746,000.00 4.~~71494~~71035% 1,~~746~~745,~~000~~255.0029 6,~~860~~850.2364 0.00 0.00 B-5 1,164,000.00 4.~~71494~~71035% 1,~~164~~163,~~000~~503.0053 4,~~573~~567.4909 0.00 0.00 B-6 1,553,435.00 4.~~71494~~71035% 1,~~553~~552,~~435~~772.0042 6,~~103~~095.6209 0.00 0.00 A-R 100.00 4.~~47261~~47287% ~~100~~0.00 0.3700 0.00 0.00 Totals 388,065,535.00 1,~~524~~509,~~765~~341.8108 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 1-A-1 0.00 0.00 ~~293~~289,~~473~~905.8295 0.00 7876,~~714~~739,~~913~~875.53 2-A-1 0.00 0.00 ~~387~~385,~~104~~514.8213 0.00 104,~~509~~116,~~158~~119.5565 3-A-1 0.00 0.00 ~~752~~742,~~699~~561.6276 0.00 ~~180~~178,~~775~~590,~~414~~173.9541 B-1 0.00 0.00 43,~~455~~395.9922 0.00 11,~~057~~052,~~648~~907.6073 B-2 0.00 0.00 17,~~535~~511.6311 0.00 4,~~462~~460,~~051~~138.1508 B-3 0.00 0.00 12,~~958~~940.2209 0.00 3,~~297~~295,~~298~~885.8314 B-4 0.00 0.00 6,~~860~~850.2364 0.00 1,~~745~~744,~~628~~880.7937 B-5 0.00 0.00 4,~~573~~567.4909 0.00 1,163,~~752~~253.5358 B-6 0.00 0.00 6,~~103~~095.6209 0.00 1,~~553~~552,~~104~~438.7385 A-R 0.00 0.00 10.1400 0.00 0.00 Totals 0.00 0.00 1,~~524~~509,~~766~~341.5808 0.00 (4) Amount Does Not Include Excess Special Hazard, Bankruptcy, 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 1-A-1 78,739,000.00 4.~~47261~~47144% ~~1000~~988.~~00000000~~10121007 3.~~72717230~~68185969 0.00000000 0.00000000 2-A-1 104,537,000.00 4.~~44365~~44170% ~~1000~~996.~~00000000~~32774711 3.~~70304122~~68782469 0.00000000 0.00000000 3-A-1 181,505,000.00 4.~~97639~~96874% ~~1000~~988.~~00000000~~04978766 4.~~14699110~~09113666 0.00000000 0.00000000 B-1 11,060,000.00 4.~~71494~~71035% ~~1000~~999.~~00000000~~57347649 3.~~92911302~~92361844 0.00000000 0.00000000 B-2 4,463,000.00 4.~~71494~~71035% ~~1000~~999.~~00000000~~57347524 3.~~92911270~~92361864 0.00000000 0.00000000 B-3 3,298,000.00 4.~~71494~~71035% ~~1000~~999.~~00000000~~57347483 3.~~92911461~~92361734 0.00000000 0.00000000 B-4 1,746,000.00 4.~~71494~~71035% ~~1000~~999.~~00000000~~57347652 3.~~92911226~~92361970 0.00000000 0.00000000 B-5 1,164,000.00 4.~~71494~~71035% ~~1000~~999.~~00000000~~57347938 3.~~92911512~~92361684 0.00000000 0.00000000 B-6 1,553,435.00 4.~~71494~~71035% ~~1000~~999.~~00000000~~57347427 3.~~92911194~~92362088 0.00000000 0.00000000 A-R 100.00 4.~~47261~~47287% ~~1000~~0.00000000 30.~~70000000~~00000000 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 1-A-1 0.00000000 0.00000000 3.~~72717230~~68185969 0.00000000 ~~999~~974.~~69409733~~61074601 2-A-1 0.00000000 0.00000000 3.~~70304122~~68782469 0.00000000 ~~999~~995.~~73366894~~97386236 3-A-1 0.00000000 0.00000000 4.~~14699110~~09113666 0.00000000 ~~995~~983.~~98035839~~94079177 B-1 0.00000000 0.00000000 3.~~92911302~~92361844 0.00000000 999.~~78739602~~35874593 B-2 0.00000000 0.00000000 3.~~92911270~~92361864 0.00000000 999.~~78739637~~35874524 B-3 0.00000000 0.00000000 3.~~92911461~~92361734 0.00000000 999.~~78739539~~35874469 B-4 0.00000000 0.00000000 3.~~92911226~~92361970 0.00000000 999.~~78739404~~35874570 B-5 0.00000000 0.00000000 3.~~92911512~~92361684 0.00000000 999.~~78739691~~35874570 B-6 0.00000000 0.00000000 3.~~92911194~~92362088 0.00000000 999.~~78739374~~35874369 A-R 0.00000000 0.00000000 110.~~40000000~~00000000 0.00000000 0.00000000 (6) Amount Does Not Include Excess Special Hazard, Bankruptcy,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 23,~~370~~424,~~052~~181.4030 Liquidations, Insurance Proceeds, Reserve Funds 0.00 Proceeds from Repurchased Loans 0.00 Other Amounts (Servicer Advances) 3023,~~286~~253.0392 Realized Loss (Gains, Subsequent Expenses & Recoveries) 0.00 Prepayment Penalties 0.00 Total Deposits 23,~~400~~447,~~338~~435.4322 Withdrawals Reimbursement for Servicer Advances 0.00 Payment of Service Fee 8988,~~008~~071.5128 Payment of Interest and Principal 23,~~311~~359,~~329~~363.9294 Total Withdrawals (Pool Distribution Amount) 23,~~400~~447,~~338~~435.4322 Ending Balance 0.00

SERVICING FEES Gross Servicing Fee 8988,~~008~~023.5110 Miscellaneous Fee 48.18 Supported Prepayment/Curtailment Interest Shortfall 0.00 Net Servicing Fee 8988,~~008~~071.5128

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 2011 0 0 0 2011 74,~~169~~685,~~983~~131.0539 0.00 0.00 0.00 74,~~169~~685,~~983~~131.0539 60 Days 0 0 0 0 0 0.00 0.00 0.00 0.00 0.00 90 Days 02 0 0 0 02 0566,400.00 0.00 0.00 0.00 0566,400.00 120 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 2013 0 0 0 2013 75,~~169~~251,~~983~~531.0539 0.00 0.00 0.00 75,~~169~~251,~~983~~531.0539 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 21.~~053388~~142264% 0.000000% 0.000000% 0.000000% 21.~~053388~~142264% 1.~~851063~~223959% 0.000000% 0.000000% 0.000000% 1.~~851063~~223959% 60 Days 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 90 Days 0.~~000000~~207684% 0.000000% 0.000000% 0.000000% 0.~~000000~~207684% 0.~~000000~~147968% 0.000000% 0.000000% 0.000000% 0.~~000000~~147968% 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 21.~~053388~~349948% 0.000000% 0.000000% 0.000000% 21.~~053388~~349948% 1.~~851063~~371927% 0.000000% 0.000000% 0.000000% 1.~~851063~~371927%

Delinquency Status By Groups

DELINQUENT BANKRUPTCY FORECLOSURE REO Total 1 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 32 0 0 0 32 ~~765~~384,~~999~~400.9900 0.00 0.00 0.00 ~~765~~384,~~999~~400.9900 60 Days 0 0 0 0 0 0.00 0.00 0.00 0.00 0.00 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 32 0 0 0 32 ~~765~~384,~~999~~400.9900 0.00 0.00 0.00 ~~765~~384,~~999~~400.9900 0-29 Days 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 30 Days 10.~~304348~~892857% 0.000000% 0.000000% 0.000000% 10.~~304348~~892857% 0.~~914575~~470050% 0.000000% 0.000000% 0.000000% 0.~~914575~~470050% 60 Days 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 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 10.~~304348~~892857% 0.000000% 0.000000% 0.000000% 10.~~304348~~892857% 0.~~914575~~470050% 0.000000% 0.000000% 0.000000% 0.~~914575~~470050% DELINQUENT BANKRUPTCY FORECLOSURE REO Total 2 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 72 0 0 0 72 3621,~~005,829~~499.9698 0.00 0.00 0.00 3621,~~005,829~~499.9698 60 Days 0 0 0 0 0 0.00 0.00 0.00 0.00 0.00 90 Days 01 0 0 0 01 0144,000.00 0.00 0.00 0.00 0144,000.00 120 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 73 0 0 0 7 3 765,~~005,829~~499.9698 0.00 0.00 0.00 3765,~~005,829~~499.9698 0-29 Days 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 30 Days 20.~~692308~~772201% 0.000000% 0.000000% 0.000000% 20.~~692308~~772201% 20.~~703147~~560910% 0.000000% 0.000000% 0.000000% 20.~~703147~~560910% 60 Days 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 90 Days 0.~~000000~~386100% 0.000000% 0.000000% 0.000000% 0.~~000000~~386100% 0.~~000000~~129961% 0.000000% 0.000000% 0.000000% 0.~~000000~~129961% 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 21.~~692308~~158301% 0.000000% 0.000000% 0.000000% 21.~~692308~~158301% 20.~~703147~~690871% 0.000000% 0.000000% 0.000000% 20.~~703147~~690871% DELINQUENT BANKRUPTCY FORECLOSURE REO Total 3 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 107 0 0 0 107 3,~~398~~679,~~153~~231.1041 0.00 0.00 0.00 3,~~398~~679,~~153~~231.1041 60 Days 0 0 0 0 0 0.00 0.00 0.00 0.00 0.00 90 Days 01 0 0 0 01 0422,400.00 0.00 0.00 0.00 0422,400.00 120 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 108 0 0 0 108 34,~~398~~101,~~153~~631.1041 0.00 0.00 0.00 34,~~398~~101,~~153~~631.1041 0-29 Days 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 30 Days 21.~~066116~~458333% 0.000000% 0.000000% 0.000000% 21.~~066116~~458333% 1.~~766266~~934357% 0.000000% 0.000000% 0.000000% 1.~~766266~~934357% 60 Days 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 90 Days 0.~~000000~~208333% 0.000000% 0.000000% 0.000000% 0.~~000000~~208333% 0.~~000000~~222077% 0.000000% 0.000000% 0.000000% 0.~~000000~~222077% 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 21.~~066116~~666667% 0.000000% 0.000000% 0.000000% 21.~~066116~~666667% 12.~~766266~~156434% 0.000000% 0.000000% 0.000000% 12.~~766266~~156434%

OTHER INFORMATION Current Period Class A Insufficient Funds 0.00 Principal Balance of Contaminated Properties 0.00 Periodic Advance 3023,~~286~~253.0392

CREDIT ENHANCEMENT Original $ Original % Current $ Current % Bankruptcy 167,771.00 0.04323265% 167,771.00 0.~~04332045~~04383698% Fraud 11,641,966.00 2.99999999% 11,641,966.00 3.~~00609298~~04193604% Special Hazard 4,000,000.00 1.03075374% 4,000,000.00 1.~~03284719~~04516232% Limit of Subordinate's Exposure to Certain Types of Losses

COLLATERAL STATEMENT Collateral Description Mixed ARM Weighted Average Gross Coupon 4.~~990363~~984571% Weighted Average Net Coupon 4.~~714976~~709903% Weighted Average Pass-Through Rate 4.~~714977~~709753% Weighted Average Maturity(Stepdown Calculation ) ~~359~~357 Beginning Scheduled Collateral Loan Count ~~976~~968 Number Of Loans Paid In Full 25 Ending Scheduled Collateral Loan Count ~~974~~963 Beginning Scheduled Collateral Balance ~~388~~384,~~065~~565,~~535~~695.0082 Ending Scheduled Collateral Balance ~~387~~382,~~278~~715,~~972~~672.2896 Ending Actual Collateral Balance at 30-~~Sep~~Nov-2003 ~~387~~382,~~344~~784,~~073~~959.6683 Monthly P &I Constant 1,~~696~~680,~~327~~001.5291 Special Servicing Fee 0.00 Prepayment Penalties 0.00 Realized Loss Amount 0.00 Cumulative Realized Loss 0.00 Ending Scheduled Balance for Premium Loans ~~387~~382,~~278~~715,~~972~~672.2896 Scheduled Principal 82,~~504~~589.1455 Unscheduled Principal ~~704~~1,~~059~~767,433.1831

Group Level Collateral Statement Group 1 2 3 Collateral Description Mixed ARM Mixed ARM Mixed ARM Weighted Average Coupon Rate 4.~~722607~~721436 4.~~707601~~705698 5.~~269375~~260607 Weighted Average Net Rate 4.~~472607~~471436 4.~~443650~~441701 4.~~976689~~969044 Weighted Average Maturity ~~358~~356 ~~358~~356 ~~358~~356 Beginning Loan Count ~~230~~227 ~~260~~259 ~~486~~482 Loans Paid In Full 03 0 2 Ending Loan Count ~~230~~224 ~~260~~259 ~~484~~480 Beginning Scheduled Balance 8382,~~765~~826,~~280~~112.0036 ~~111~~110,~~209~~823,~~613~~253.0083 ~~193~~190,~~090~~916,~~642~~329.0063 Ending scheduled Balance 8381,~~740~~762,~~011~~805.6386 ~~111~~110,~~180~~785,~~537~~010.8434 ~~192~~190,~~358~~167,~~422~~856.8176 Record Date 0911/30/2003 0911/30/2003 0911/30/2003 Principal And Interest Constant ~~347~~343,~~697~~700.3579 ~~456~~455,~~842~~343.8934 ~~891~~880,~~787~~957.2878 Scheduled Principal 1817,~~038~~818.6294 20,~~567~~759.4736 4344,~~898~~011.0525 Unscheduled Principal 71,~~230~~045,487.2256 817,~~508~~484.0313 ~~688~~704,~~320~~461.9362 Scheduled Interest ~~329~~325,~~658~~881.7385 ~~436~~434,~~275~~583.4298 ~~847~~836,~~889~~946.2353 Servicing Fees 17,~~451~~255.1044 24,~~461~~380.6389 4746,~~095~~386.7877 Master Servicing Fees 0.00 0.00 0.00 Trustee Fee 0.00 0.00 0.00 FRY Amount 0.00 0.00 0.00 Special Hazard Fee 0.00 0.00 0.00 Other Fee 0.00 0.00 48.2818 Pool Insurance Fee 0.00 0.00 0.00 Spread Fee 1 0.00 0.00 0.00 Spread Fee 2 0.00 0.00 0.00 Spread Fee 3 0.00 0.00 0.00 Net Interest ~~312~~308,~~207~~626.6341 ~~411~~410,~~813~~203.7909 ~~800~~790,~~745~~511.1758 Realized Loss Amount 0.00 0.00 0.00 Cumulative Realized Loss 0.00 0.00 0.00 Percentage of Cumulative Losses 0.000000 0.000000 0.000000 Prepayment Penalties 0.00 0.00 0.00 Special Servicing Fee 0.00 0.00 0.00 Pass-Through Rate 4.~~472607~~471436 4.~~443649~~441701 4.~~976389~~968742

Group Level Collateral Statement Group Total Collateral Description Mixed ARM Weighted Average Coupon Rate 4.~~990363~~984571 Weighted Average Net Rate 4.~~714976~~709903 Weighted Average Maturity ~~359~~357 Beginning Loan Count ~~976~~968 Loans Paid In Full 25 Ending Loan Count ~~974~~963 Beginning Scheduled Balance ~~388~~384,~~065~~565,~~535~~695.0082 Ending scheduled Balance ~~387~~382,~~278~~715,~~972~~672.2896 Record Date 0911/30/2003 Principal And Interest Constant 1,~~696~~680,~~327~~001.5291 Scheduled Principal 82,~~504~~589.1455 Unscheduled Principal ~~704~~1,~~059~~767,433.1831 Scheduled Interest 1,~~613~~597,~~823~~412.3836 Servicing Fees 8988,~~008~~023.5110 Master Servicing Fees 0.00 Trustee Fee 0.00 FRY Amount 0.00 Special Hazard Fee 0.00 Other Fee 48.2818 Pool Insurance Fee 0.00 Spread Fee 1 0.00 Spread Fee 2 0.00 Spread Fee 3 0.00 Net Interest 1,~~524~~509,~~766~~341.5908 Realized Loss Amount 0.00 Cumulative Realized Loss 0.00 Percentage of Cumulative Losses 0.000000 Prepayment Penalties 0.00 Special Servicing Fee 0.00 Pass-Through Rate 4.~~714977~~709753

Miscellaneous Reporting Group 1 Senior Percentage 93.~~999685~~934267% Subordinate Percentage 6.~~000315~~065733% Senior Prepayment Percentage 100.000000% Group 2 Senior Percentage 93.~~999967~~981281% Subordinate Percentage 6.~~000033~~018719% Senior Prepayment Percentage 100.000000% Group 3 Senior Percentage 93.~~999895~~934331% Subordinate Percentage 6.~~000105~~065669% Senior Prepayment Percentage 100.000000%

Filing Compare · MORTGAGE ASSET SEC TRANS INC MARM 2003 4