8-K 1 mam04009_dec.txt DECEMBER 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): December 27, 2004 MASTR ADJUSTABLE RATE MORTGAGES TRUST Mortgage Pass-Through Certificates, Series 2004-9 Trust (Exact name of registrant as specified in its charter) New York (governing law of 333-106982-42 54-2161220 Pooling and Servicing Agreement) (Commission 54-2161221 (State or other File Number) 54-6643050 jurisdiction IRS EIN of Incorporation) c/o Wells Fargo Bank, 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) Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below): [ ] Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) [ ] Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) [ ] Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act(17 CFR 240.14d-2(b)) [ ] Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act(17 CFR 240.13e-4(c)) ITEM 8.01 Other Events On December 27, 2004 a distribution was made to holders of MASTR ADJUSTABLE RATE MORTGAGES TRUST, Mortgage Pass-Through Certificates, Series 2004-9 Trust. ITEM 9.01 Financial Statements and Exhibits (c) Exhibits Exhibit Number Description EX-99.1 Monthly report distributed to holders of Mortgage Pass-Through Certificates, Series 2004-9 Trust, relating to the December 27, 2004 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 2004-9 Trust (Registrant) By: Wells Fargo Bank, N.A. as Master Servicer By: /s/ Beth Belfield as Assistant Vice President By: Beth Belfield as Assistant Vice President Date: 1/4/2005 INDEX TO EXHIBITS Exhibit Number Description EX-99.1 Monthly report distributed to holders of Mortgage Pass-Through Certificates, Series 2004-9 Trust, relating to the December 27, 2004 distribution. EX-99.1

~~Mortgage~~MASTR ~~Asset~~Adjustable ~~Securitization~~Rate ~~Transactions,~~Mortgages ~~Inc~~Trust Mortgage Pass-Through Certificates Record Date: 1011/3130/2004 Distribution Date: 1112/2627/2004 ~~MARM~~MASTR Adjustable Rate Mortgages Trust Mortgage Pass-Through Certificates Series: 2004-9 Contact: Customer Service - CTSLink Wells Fargo Bank, 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 576433RH1 SEN 2.~~22250~~47000% ~~170~~167,~~021~~032,~~964~~173.8510 ~~335~~355,~~887~~268.8415 24,~~989~~031,~~791~~454.7607 1-A-2 576433RJ7 SEN 2.~~43250~~68000% 24,165,000.00 5255,~~250~~767.1045 0.00 1-A-3 576433RK4 SEN 2.~~31250~~56000% ~~162~~160,~~758~~126,~~149~~572.4877 ~~334~~352,~~558~~990.4213 23,~~631~~548,~~576~~434.7164 1-A-4 576433RL2 SEN 2.~~53250~~78000% 11,591,000.00 2627,~~092~~747.6357 0.00 1-A-5 576433RM0 SEN 2.~~34250~~59000% 24,~~654~~296,~~815~~600.3733 5154,~~336~~188.8017 ~~358~~483,~~215~~019.0543 1-A-6 576433RN8 SEN 2.~~43250~~68000% 18,365,000.00 3942,~~709~~382.2134 0.00 2-A-1 576433RP3 SEN 2.~~31250~~56000% ~~286~~280,~~270~~047,~~481~~535.4043 ~~588~~617,~~444~~349.8823 610,~~222~~383,~~945~~483.9681 2-A-2 576433RQ1 SEN 2.~~35250~~60000% 2423,~~483~~951,~~466~~244.3086 5153,~~197~~624.6518 ~~532~~888,~~221~~054.4410 2-A-3A 576433RR9 SEN 2.~~37250~~62000% 15,~~903~~557,~~480~~770.3761 3335,~~538~~100.6706 ~~345~~576,~~709~~844.7642 2-A-3B 576433RS7 SEN 2.~~41250~~66000% 15,~~903~~557,~~480~~770.3761 3435,~~104~~635.1394 ~~345~~576,~~709~~844.7642 M-1 576433RT5 MEZ 2.~~51250~~76000% 28,334,000.00 6367,~~279~~340.2747 0.00 M-2 576433RU2 MEZ 3.~~08250~~33000% 20,418,000.00 5558,~~945~~548.3262 0.00 B-1 576433RV0 SUB 3.~~63250~~88000% 5,416,000.00 1718,~~487~~095.6646 0.00 B-2 576433RW8 SUB 5.~~23250~~48000% 6,667,783.00 31,~~012~~464.6053 0.00 LR 576433TH9 SEN 0.00000% 0.00 0.00 0.00 R 576433TG1 SEN 0.00000% 0.00 0.00 0.00 X 576433TE6 SEN 0.00000% 0.00 2,~~260~~105,~~171~~986.5963 0.00 P 576433TF3 PPAY 0.00000% 0.01 ~~110~~39,~~014~~131.0693 0.00 Totals ~~814~~801,~~952~~526,~~621~~450.1572 43,~~085~~950,~~030~~620.8386 1320,~~426~~488,~~170~~134.4489

Certificateholder Distribution Summary (continued) Current Ending Cumulative Realized Certificate Total Realized Class Loss Balance Distribution Losses 1-A-1 0.00 ~~167~~163,~~032~~000,~~173~~719.1002 34,~~325~~386,~~679~~722.6022 0.00 1-A-2 0.00 24,165,000.00 5255,~~250~~767.1045 0.00 1-A-3 0.00 ~~160~~156,~~126~~578,~~572~~138.7713 23,~~966~~901,~~135~~424.1377 0.00 1-A-4 0.00 11,591,000.00 2627,~~092~~747.6357 0.00 1-A-5 0.00 2423,~~296~~813,~~600~~580.3389 ~~409~~537,~~551~~207.8560 0.00 1-A-6 0.00 18,365,000.00 3942,~~709~~382.2134 0.00 2-A-1 0.00 ~~280~~269,~~047~~664,~~535~~051.4362 611,~~811~~000,~~390~~833.8404 0.00 2-A-2 0.00 23,~~951~~063,~~244~~190.8676 ~~583~~941,~~419~~678.0928 0.00 2-A-3A 0.00 1514,~~557~~980,~~770~~926.6119 ~~379~~611,~~248~~944.4348 0.00 2-A-3B 0.00 1514,~~557~~980,~~770~~926.6119 ~~379~~612,~~813~~480.8936 0.00 M-1 0.00 28,334,000.00 6367,~~279~~340.2747 0.00 M-2 0.00 20,418,000.00 5558,~~945~~548.3262 0.00 B-1 0.00 5,416,000.00 1718,~~487~~095.6646 0.00 B-2 0.00 6,667,783.00 31,~~012~~464.6053 0.00 LR 0.00 0.00 0.00 0.00 R 0.00 0.00 0.00 0.00 X 0.00 0.00 2,~~260~~105,~~171~~986.5963 0.00 P 0.00 0.01 ~~110~~39,~~014~~131.0693 0.00 Totals 0.00 ~~801~~781,~~526~~038,~~450~~315.7281 1724,~~511~~438,~~201~~755.2775 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-1 172,903,000.00 ~~170~~167,~~021~~032,~~964~~173.8510 0.00 24,~~989~~031,~~791~~454.7607 0.00 0.00 1-A-2 24,165,000.00 24,165,000.00 0.00 0.00 0.00 0.00 1-A-3 165,294,000.00 ~~162~~160,~~758~~126,~~149~~572.4877 0.00 23,~~631~~548,~~576~~434.7164 0.00 0.00 1-A-4 11,591,000.00 11,591,000.00 0.00 0.00 0.00 0.00 1-A-5 25,000,000.00 24,~~654~~296,~~815~~600.3733 0.00 ~~358~~483,~~215~~019.0543 0.00 0.00 1-A-6 18,365,000.00 18,365,000.00 0.00 0.00 0.00 0.00 2-A-1 292,310,000.00 ~~286~~280,~~270~~047,~~481~~535.4043 0.00 610,~~222~~383,~~945~~483.9681 0.00 0.00 2-A-2 25,000,000.00 2423,~~483~~951,~~466~~244.3086 0.00 ~~532~~888,~~221~~054.4410 0.00 0.00 2-A-3A 16,239,000.00 15,~~903~~557,~~480~~770.3761 0.00 ~~345~~576,~~709~~844.7642 0.00 0.00 2-A-3B 16,239,000.00 15,~~903~~557,~~480~~770.3761 0.00 ~~345~~576,~~709~~844.7642 0.00 0.00 M-1 28,334,000.00 28,334,000.00 0.00 0.00 0.00 0.00 M-2 20,418,000.00 20,418,000.00 0.00 0.00 0.00 0.00 B-1 5,416,000.00 5,416,000.00 0.00 0.00 0.00 0.00 B-2 6,667,783.00 6,667,783.00 0.00 0.00 0.00 0.00 LR 0.00 0.00 0.00 0.00 0.00 0.00 R 0.00 0.00 0.00 0.00 0.00 0.00 X 0.00 0.00 0.00 0.00 0.00 0.00 P 0.01 0.01 0.00 0.00 0.00 0.00 Totals 827,941,783.01 ~~814~~801,~~952~~526,~~621~~450.1572 0.00 1320,~~426~~488,~~170~~134.4489 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 24,~~989~~031,~~791~~454.7607 ~~167~~163,~~032~~000,~~173~~719.1002 0.~~96604555~~94272927 24,~~989~~031,~~791~~454.7607 1-A-2 0.00 24,165,000.00 1.00000000 0.00 1-A-3 23,~~631~~548,~~576~~434.7164 ~~160~~156,~~126~~578,~~572~~138.7713 0.~~96873796~~94727055 23,~~631~~548,~~576~~434.7164 1-A-4 0.00 11,591,000.00 1.00000000 0.00 1-A-5 ~~358~~483,~~215~~019.0543 2423,~~296~~813,~~600~~580.3389 0.~~97186401~~95254324 ~~358~~483,~~215~~019.0543 1-A-6 0.00 18,365,000.00 1.00000000 0.00 2-A-1 610,~~222~~383,~~945~~483.9681 ~~280~~269,~~047~~664,~~535~~051.4362 0.~~95804979~~92252763 610,~~222~~383,~~945~~483.9681 2-A-2 ~~532~~888,~~221~~054.4410 23,~~951~~063,~~244~~190.8676 0.~~95804979~~92252763 ~~532~~888,~~221~~054.4410 2-A-3A ~~345~~576,~~709~~844.7642 1514,~~557~~980,~~770~~926.6119 0.~~95804979~~92252763 ~~345~~576,~~709~~844.7642 2-A-3B ~~345~~576,~~709~~844.7642 1514,~~557~~980,~~770~~926.6119 0.~~95804979~~92252763 ~~345~~576,~~709~~844.7642 M-1 0.00 28,334,000.00 1.00000000 0.00 M-2 0.00 20,418,000.00 1.00000000 0.00 B-1 0.00 5,416,000.00 1.00000000 0.00 B-2 0.00 6,667,783.00 1.00000000 0.00 LR 0.00 0.00 0.00000000 0.00 R 0.00 0.00 0.00000000 0.00 X 0.00 0.00 0.00000000 0.00 P 0.00 0.01 1.00000000 0.00 Totals 1320,~~426~~488,~~170~~134.4489 ~~801~~781,~~526~~038,~~450~~315.7281 0.~~96809518~~94334932 1320,~~426~~488,~~170~~134.4489

Principal Distribution Factors Statement Original Beginning Scheduled Unscheduled Face Certificate Principal Principal Class (2) Amount Balance Distribution Distribution Accretion 1-A-1 172,903,000.00 ~~983~~966.~~33727495~~04554635 0.00000000 1723.~~29172866~~31627600 0.00000000 1-A-2 24,165,000.00 1000.00000000 0.00000000 0.00000000 0.00000000 1-A-3 165,294,000.00 ~~984~~968.~~65854465~~73796248 0.00000000 1521.~~92058217~~46741346 0.00000000 1-A-4 11,591,000.00 1000.00000000 0.00000000 0.00000000 0.00000000 1-A-5 25,000,000.00 ~~986~~971.~~19261480~~86401320 0.00000000 1419.~~32860200~~32077720 0.00000000 1-A-6 18,365,000.00 1000.00000000 0.00000000 0.00000000 0.00000000 2-A-1 292,310,000.00 ~~979~~958.~~33865212~~04979450 0.00000000 2135.~~28885758~~52216418 0.00000000 2-A-2 25,000,000.00 ~~979~~958.~~33865200~~04979440 0.00000000 2135.~~28885760~~52216400 0.00000000 2-A-3A 16,239,000.00 ~~979~~958.~~33865201~~04979432 0.00000000 2135.~~28885769~~52216393 0.00000000 2-A-3B 16,239,000.00 ~~979~~958.~~33865201~~04979432 0.00000000 2135.~~28885769~~52216393 0.00000000 M-1 28,334,000.00 1000.00000000 0.00000000 0.00000000 0.00000000 M-2 20,418,000.00 1000.00000000 0.00000000 0.00000000 0.00000000 B-1 5,416,000.00 1000.00000000 0.00000000 0.00000000 0.00000000 B-2 6,667,783.00 1000.00000000 0.00000000 0.00000000 0.00000000 LR 0.00 0.00000000 0.00000000 0.00000000 0.00000000 R 0.00 0.00000000 0.00000000 0.00000000 0.00000000 X 0.00 0.00000000 0.00000000 0.00000000 0.00000000 P 0.01 0.00000000 0.00000000 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 1-A-1 0.00000000 1723.~~29172866~~31627600 ~~966~~942.~~04554635~~72927028 0.~~96604555~~94272927 1723.~~29172866~~31627600 1-A-2 0.00000000 0.00000000 1,000.00000000 1.00000000 0.00000000 1-A-3 0.00000000 1521.~~92058217~~46741346 ~~968~~947.~~73796248~~27054902 0.~~96873796~~94727055 1521.~~92058217~~46741346 1-A-4 0.00000000 0.00000000 1,000.00000000 1.00000000 0.00000000 1-A-5 0.00000000 1419.~~32860200~~32077720 ~~971~~952.~~86401320~~54323560 0.~~97186401~~95254324 1419.~~32860200~~32077720 1-A-6 0.00000000 0.00000000 1,000.00000000 1.00000000 0.00000000 2-A-1 0.00000000 2135.~~28885758~~52216418 ~~958~~922.~~04979450~~52763032 0.~~95804979~~92252763 2135.~~28885758~~52216418 2-A-2 0.00000000 2135.~~28885760~~52216400 ~~958~~922.~~04979440~~52763040 0.~~95804979~~92252763 2135.~~28885760~~52216400 2-A-3A 0.00000000 2135.~~28885769~~52216393 ~~958~~922.~~04979432~~52763040 0.~~95804979~~92252763 2135.~~28885769~~52216393 2-A-3B 0.00000000 2135.~~28885769~~52216393 ~~958~~922.~~04979432~~52763040 0.~~95804979~~92252763 2135.~~28885769~~52216393 M-1 0.00000000 0.00000000 1,000.00000000 1.00000000 0.00000000 M-2 0.00000000 0.00000000 1,000.00000000 1.00000000 0.00000000 B-1 0.00000000 0.00000000 1,000.00000000 1.00000000 0.00000000 B-2 0.00000000 0.00000000 1,000.00000000 1.00000000 0.00000000 LR 0.00000000 0.00000000 0.00000000 0.00000000 0.00000000 R 0.00000000 0.00000000 0.00000000 0.00000000 0.00000000 X 0.00000000 0.00000000 0.00000000 0.00000000 0.00000000 P 0.00000000 0.00000000 0.00000000 1.00000000 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-1 172,903,000.00 2.~~22250~~47000% ~~170~~167,~~021~~032,~~964~~173.8510 ~~335~~355,~~887~~268.8415 0.00 0.00 1-A-2 24,165,000.00 2.~~43250~~68000% 24,165,000.00 5255,~~250~~767.1045 0.00 0.00 1-A-3 165,294,000.00 2.~~31250~~56000% ~~162~~160,~~758~~126,~~149~~572.4877 ~~334~~352,~~558~~990.4213 0.00 0.00 1-A-4 11,591,000.00 2.~~53250~~78000% 11,591,000.00 2627,~~092~~747.6357 0.00 0.00 1-A-5 25,000,000.00 2.~~34250~~59000% 24,~~654~~296,~~815~~600.3733 5154,~~336~~188.8017 0.00 0.00 1-A-6 18,365,000.00 2.~~43250~~68000% 18,365,000.00 3942,~~709~~382.2134 0.00 0.00 2-A-1 292,310,000.00 2.~~31250~~56000% ~~286~~280,~~270~~047,~~481~~535.4043 ~~588~~617,~~444~~349.8823 0.00 0.00 2-A-2 25,000,000.00 2.~~35250~~60000% 2423,~~483~~951,~~466~~244.3086 5153,~~197~~624.6518 0.00 0.00 2-A-3A 16,239,000.00 2.~~37250~~62000% 15,~~903~~557,~~480~~770.3761 3335,~~538~~100.6706 0.00 0.00 2-A-3B 16,239,000.00 2.~~41250~~66000% 15,~~903~~557,~~480~~770.3761 3435,~~104~~635.1394 0.00 0.00 M-1 28,334,000.00 2.~~51250~~76000% 28,334,000.00 6367,~~279~~340.2747 0.00 0.00 M-2 20,418,000.00 3.~~08250~~33000% 20,418,000.00 5558,~~945~~548.3262 0.00 0.00 B-1 5,416,000.00 3.~~63250~~88000% 5,416,000.00 1718,~~487~~095.6646 0.00 0.00 B-2 6,667,783.00 5.~~23250~~48000% 6,667,783.00 31,~~012~~464.6053 0.00 0.00 LR 0.00 0.00000% 0.00 0.00 0.00 0.00 R 0.00 0.00000% 0.00 0.00 0.00 0.00 X 0.00 0.00000% ~~820~~806,~~369~~943,~~452~~281.1370 0.00 0.00 0.00 P 0.01 0.00000% 0.01 0.00 0.00 0.00 Totals 827,941,783.01 1,~~714~~805,~~845~~502.1830 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 ~~335~~355,~~887~~268.8415 0.00 ~~167~~163,~~032~~000,~~173~~719.1002 1-A-2 0.00 0.00 5255,~~250~~767.1045 0.00 24,165,000.00 1-A-3 0.00 0.00 ~~334~~352,~~558~~990.4213 0.00 ~~160~~156,~~126~~578,~~572~~138.7713 1-A-4 0.00 0.00 2627,~~092~~747.6357 0.00 11,591,000.00 1-A-5 0.00 0.00 5154,~~336~~188.8017 0.00 2423,~~296~~813,~~600~~580.3389 1-A-6 0.00 0.00 3942,~~709~~382.2134 0.00 18,365,000.00 2-A-1 0.00 0.00 ~~588~~617,~~444~~349.8823 0.00 ~~280~~269,~~047~~664,~~535~~051.4362 2-A-2 0.00 0.00 5153,~~197~~624.6518 0.00 23,~~951~~063,~~244~~190.8676 2-A-3A 0.00 0.00 3335,~~538~~100.6706 0.00 1514,~~557~~980,~~770~~926.6119 2-A-3B 0.00 0.00 3435,~~104~~635.1394 0.00 1514,~~557~~980,~~770~~926.6119 M-1 0.00 0.00 6367,~~279~~340.2747 0.00 28,334,000.00 M-2 0.00 0.00 5558,~~945~~548.3262 0.00 20,418,000.00 B-1 0.00 0.00 1718,~~487~~095.6646 0.00 5,416,000.00 B-2 0.00 0.00 31,~~012~~464.6053 0.00 6,667,783.00 LR 0.00 0.00 0.00 0.00 0.00 R 0.00 0.00 0.00 0.00 0.00 X 0.00 0.00 2,~~260~~105,~~171~~986.5963 0.00 ~~806~~786,~~943~~455,~~281~~146.7079 P 0.00 0.00 ~~110~~39,~~014~~131.0693 0.00 0.01 Totals 0.00 0.00 43,~~085~~950,~~030~~620.8386 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-1 172,903,000.00 2.~~22250~~47000% ~~983~~966.~~33727495~~04554635 12.~~94263743~~05472519 0.00000000 0.00000000 1-A-2 24,165,000.00 2.~~43250~~68000% 1000.00000000 2.~~16222222~~30777778 0.00000000 0.00000000 1-A-3 165,294,000.00 2.~~31250~~56000% ~~984~~968.~~65854465~~73796248 2.~~02402035~~13552900 0.00000000 0.00000000 1-A-4 11,591,000.00 2.~~53250~~78000% 1000.00000000 2.~~25111121~~39388922 0.00000000 0.00000000 1-A-5 25,000,000.00 2.~~34250~~59000% ~~986~~971.~~19261480~~86401320 2.~~05347200~~16752680 0.00000000 0.00000000 1-A-6 18,365,000.00 2.~~43250~~68000% 1000.00000000 2.~~16222216~~30777784 0.00000000 0.00000000 2-A-1 292,310,000.00 2.~~31250~~56000% ~~979~~958.~~33865212~~04979450 2.~~01308501~~11196753 0.00000000 0.00000000 2-A-2 25,000,000.00 2.~~35250~~60000% ~~979~~958.~~33865200~~04979440 2.~~04790600~~14496720 0.00000000 0.00000000 2-A-3A 16,239,000.00 2.~~37250~~62000% ~~979~~958.~~33865201~~04979432 2.~~06531621~~16146684 0.00000000 0.00000000 2-A-3B 16,239,000.00 2.~~41250~~66000% ~~979~~958.~~33865201~~04979432 2.~~10013732~~19446641 0.00000000 0.00000000 M-1 28,334,000.00 2.~~51250~~76000% 1000.00000000 2.~~23333345~~37666655 0.00000000 0.00000000 M-2 20,418,000.00 3.~~08250~~33000% 1000.00000000 2.~~74000000~~86750024 0.00000000 0.00000000 B-1 5,416,000.00 3.~~63250~~88000% 1000.00000000 3.~~22888848~~34111152 0.00000000 0.00000000 B-2 6,667,783.00 5.~~23250~~48000% 1000.00000000 4.~~65111117~~71888932 0.00000000 0.00000000 LR 0.00 0.00000% 0.00000000 0.00000000 0.00000000 0.00000000 R 0.00 0.00000% 0.00000000 0.00000000 0.00000000 0.00000000 X 0.00 0.00000% ~~984~~968.~~41347914~~30256337 0.00000000 0.00000000 0.00000000 P 0.01 0.00000% 0.00000000 0.00000000 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 12.~~94263743~~05472519 0.00000000 ~~966~~942.~~04554635~~72927028 1-A-2 0.00000000 0.00000000 2.~~16222222~~30777778 0.00000000 1000.00000000 1-A-3 0.00000000 0.00000000 2.~~02402035~~13552900 0.00000000 ~~968~~947.~~73796248~~27054902 1-A-4 0.00000000 0.00000000 2.~~25111121~~39388922 0.00000000 1000.00000000 1-A-5 0.00000000 0.00000000 2.~~05347200~~16752680 0.00000000 ~~971~~952.~~86401320~~54323560 1-A-6 0.00000000 0.00000000 2.~~16222216~~30777784 0.00000000 1000.00000000 2-A-1 0.00000000 0.00000000 2.~~01308501~~11196753 0.00000000 ~~958~~922.~~04979450~~52763032 2-A-2 0.00000000 0.00000000 2.~~04790600~~14496720 0.00000000 ~~958~~922.~~04979440~~52763040 2-A-3A 0.00000000 0.00000000 2.~~06531621~~16146684 0.00000000 ~~958~~922.~~04979432~~52763040 2-A-3B 0.00000000 0.00000000 2.~~10013732~~19446641 0.00000000 ~~958~~922.~~04979432~~52763040 M-1 0.00000000 0.00000000 2.~~23333345~~37666655 0.00000000 1000.00000000 M-2 0.00000000 0.00000000 2.~~74000000~~86750024 0.00000000 1000.00000000 B-1 0.00000000 0.00000000 3.~~22888848~~34111152 0.00000000 1000.00000000 B-2 0.00000000 0.00000000 4.~~65111117~~71888932 0.00000000 1000.00000000 LR 0.00000000 0.00000000 0.00000000 0.00000000 0.00000000 R 0.00000000 0.00000000 0.00000000 0.00000000 0.00000000 X 0.00000000 0.00000000 2.~~71212363~~52710729 0.00000000 ~~968~~943.~~30256337~~71754730 P 0.00000000 0.00000000 0.00000000 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 1724,~~515~~511,~~397~~092.6725 Liquidations, Insurance Proceeds, Reserve Funds 0.00 Proceeds from Repurchased Loans 0.00 Other Amounts (Servicer Advances) ~~106~~105,~~355~~550.9451 Realized Loss (Gains, Subsequent Expenses & Recoveries) 0.00 Prepayment Penalties ~~110~~39,~~014~~131.0693 Total Deposits 1724,~~731~~655,~~767~~774.6769 Withdrawals Reimbursement for Servicer Advances 0.00 Payment of Service Fee ~~220~~217,~~566~~018.4094 Payment of Interest and Principal 1724,~~511~~438,~~201~~755.2775 Total Withdrawals (Pool Distribution Amount) 1724,~~731~~655,~~767~~774.6769 Ending Balance 0.00

SERVICING FEES Gross Servicing Fee ~~217~~214,~~866~~320.0608 LPMI 2,~~700~~698.3486 Supported Prepayment/Curtailment Interest Shortfall 0.00 Net Servicing Fee ~~220~~217,~~566~~018.4094

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 4 0 0 4 ~~656~~655,~~114~~363.9710 0.00 0.00 ~~656~~655,~~114~~363.9710 30 Days 7072 0 0 0 7072 1816,~~289~~047,~~380~~510.4521 0.00 0.00 0.00 1816,~~289~~047,~~380~~510.4521 60 Days 313 0 0 0 313 ~~957~~2,~~172~~966,288.8486 0.00 0.00 0.00 ~~957~~2,~~172~~966,288.8486 90 Days 01 0 0 0 01 0239,172.0084 0.00 0.00 0.00 0239,172.0084 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 7386 4 0 0 7790 19,~~246~~252,~~553~~971.2991 ~~656~~655,~~114~~363.9710 0.00 0.00 19,~~902~~908,~~668~~335.2601 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.~~119653~~122362% 0.000000% 0.000000% 0.~~119653~~122362% 0.~~081283~~083304% 0.000000% 0.000000% 0.~~081283~~083304% 30 Days 2.~~093928~~202508% 0.000000% 0.000000% 0.000000% 2.~~093928~~202508% 2.~~265772~~039812% 0.000000% 0.000000% 0.000000% 2.~~265772~~039812% 60 Days 0.~~089740~~397675% 0.000000% 0.000000% 0.000000% 0.~~089740~~397675% 0.~~118579~~377047% 0.000000% 0.000000% 0.000000% 0.~~118579~~377047% 90 Days 0.~~000000~~030590% 0.000000% 0.000000% 0.000000% 0.~~000000~~030590% 0.~~000000~~030401% 0.000000% 0.000000% 0.000000% 0.~~000000~~030401% 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 2.~~183667~~630774% 0.~~119653~~122362% 0.000000% 0.000000% 2.~~303320~~753136% 2.~~384351~~447261% 0.~~081283~~083304% 0.000000% 0.000000% 2.~~465634~~530565%

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 4 0 0 4 ~~656~~655,~~114~~363.9710 0.00 0.00 ~~656~~655,~~114~~363.9710 30 Days 5255 0 0 0 5255 89,~~753~~291,~~301~~569.5930 0.00 0.00 0.00 89,~~753~~291,~~301~~569.5930 60 Days 211 0 0 0 211 ~~532~~1,~~172~~850,970.8452 0.00 0.00 0.00 ~~532~~1,~~172~~850,970.8452 90 Days 01 0 0 0 01 0239,172.0084 0.00 0.00 0.00 0239,172.0084 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 5467 4 0 0 5871 911,~~285~~381,~~474~~712.4366 ~~656~~655,~~114~~363.9710 0.00 0.00 912,~~941~~037,~~589~~075.4076 0-29 Days 0.~~154321~~157233% 0.000000% 0.000000% 0.~~154321~~157233% 0.~~148522~~151109% 0.000000% 0.000000% 0.~~148522~~151109% 30 Days 2.~~006173~~161950% 0.000000% 0.000000% 0.000000% 2.~~006173~~161950% 12.~~981448~~142378% 0.000000% 0.000000% 0.000000% 12.~~981448~~142378% 60 Days 0.~~077160~~432390% 0.000000% 0.000000% 0.000000% 0.~~077160~~432390% 0.~~120466~~426783% 0.000000% 0.000000% 0.000000% 0.~~120466~~426783% 90 Days 0.~~000000~~039308% 0.000000% 0.000000% 0.000000% 0.~~000000~~039308% 0.~~000000~~055147% 0.000000% 0.000000% 0.000000% 0.~~000000~~055147% 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 2.~~083333~~633648% 0.~~154321~~157233% 0.000000% 0.000000% 2.~~237654~~790881% 2.~~101914~~624308% 0.~~148522~~151109% 0.000000% 0.000000% 2.~~250436~~775416% 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 1817 0 0 0 1817 96,~~536~~755,~~078~~940.8691 0.00 0.00 0.00 96,~~536~~755,~~078~~940.8691 60 Days 12 0 0 0 12 ~~425~~1,~~000~~115,318.0034 0.00 0.00 0.00 ~~425~~1,~~000~~115,318.0034 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 19 0 0 0 19 97,~~961~~871,~~078~~259.8625 0.00 0.00 0.00 97,~~961~~871,~~078~~259.8625 0-29 Days 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 30 Days 2.~~396804~~344828% 0.000000% 0.000000% 0.000000% 2.~~396804~~344828% 21.~~609478~~913802% 0.000000% 0.000000% 0.000000% 21.~~609478~~913802% 60 Days 0.~~133156~~275862% 0.000000% 0.000000% 0.000000% 0.~~133156~~275862% 0.~~116298~~315944% 0.000000% 0.000000% 0.000000% 0.~~116298~~315944% 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 2.~~529960~~620690% 0.000000% 0.000000% 0.000000% 2.~~529960~~620690% 2.~~725776~~229746% 0.000000% 0.000000% 0.000000% 2.~~725776~~229746%

OTHER INFORMATION Current Period Class A Insufficient Funds 0.00 Principal Balance of Contaminated Properties 0.00 Periodic Advance ~~106~~105,~~355~~550.9451

COLLATERAL STATEMENT Collateral Description Mixed ARM Weighted Average Gross Coupon 6.~~137112~~139476% Weighted Average Net Coupon 5.~~818428~~816749% Weighted Average Pass-Through Rate 5.~~814478~~816749% Weighted Average Maturity(Stepdown Calculation ) ~~356~~355 Beginning Scheduled Collateral Loan Count 3,~~389~~343 Number Of Loans Paid In Full 4674 Ending Scheduled Collateral Loan Count 3,~~343~~269 Beginning Scheduled Collateral Balance ~~820~~806,~~369~~943,~~452~~281.1370 Ending Scheduled Collateral Balance ~~806~~786,~~943~~455,~~281~~146.7079 Ending Actual Collateral Balance at 3130-~~Oct~~Nov-2004 ~~807~~786,~~202~~714,~~971~~983.9323 Monthly P &I Constant 4,~~513~~441,~~416~~133.3149 Special Servicing Fee 0.00 Prepayment Penalties ~~110~~39,~~014~~131.0693 Realized Loss Amount 0.00 Cumulative Realized Loss 0.00 Scheduled Principal ~~317~~312,~~833~~625.3379 Unscheduled Principal 1320,~~108~~175,~~337~~509.1012 Required Overcollateralization Amount 0.00 Overcollateralized Increase Amount 0.00 Overcollateralized reduction Amount 0.00 Specified O/C Amount 5,416,830.99 Overcollateralized Amount 5,416,830.99 Overcollateralized Deficiency Amount 0.00 Base Overcollateralized Amount 0.00 Extra principal distribution Amount 0.00 Excess Cash Amount 2,~~260~~105,~~171~~986.5963

Group Level Collateral Statement Group 1 2 Total Collateral Description Mixed ARM Mixed ARM Mixed ARM Weighted Average Coupon Rate 6.~~234690~~234885 6.~~019948~~024143 6.~~137112~~139476 Weighted Average Net Rate 5.~~915748~~915992 5.~~701572~~705646 5.~~818428~~816749 Weighted Average Maturity ~~356~~355 ~~356~~355 ~~356~~355 Beginning Loan Count 2,~~622~~592 ~~767~~751 3,~~389~~343 Loans Paid In Full 3048 1626 4674 Ending Loan Count 2,~~592~~544 ~~751~~725 3,~~343~~269 Beginning Scheduled Balance ~~447~~441,~~598~~618,~~109~~526.7928 ~~372~~365,~~771~~324,~~342~~755.3442 ~~820~~806,~~369~~943,~~452~~281.1370 Ending scheduled Balance ~~441~~433,~~618~~555,~~526~~618.2813 ~~365~~352,~~324~~899,~~755~~528.4266 ~~806~~786,~~943~~455,~~281~~146.7079 Record Date 1011/3130/2004 1011/3130/2004 1011/3130/2004 Principal And Interest Constant 2,~~510~~474,~~009~~703.4289 21,~~003~~966,~~406~~429.8960 4,~~513~~441,~~416~~133.3149 Scheduled Principal ~~184~~180,~~479~~169.9094 ~~133~~132,~~353~~455.4385 ~~317~~312,~~833~~625.3379 Unscheduled Principal 57,~~795~~882,~~103~~738.6121 712,~~313~~292,~~233~~770.4991 1320,~~108~~175,~~337~~509.1012 Scheduled Interest 2,~~325~~294,~~529~~533.5295 1,~~870~~833,~~053~~973.4675 4,~~195~~128,~~582~~507.9870 Servicing Fees ~~118~~117,~~964~~357.7966 9896,~~901~~962.2742 ~~217~~214,~~866~~320.0608 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 1,~~175~~173.0090 1,~~525~~524.3496 2,~~700~~698.3486 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 2,~~205~~176,~~389~~002.7339 1,~~769~~735,~~626~~486.8537 3,~~975~~911,~~016~~488.5876 Realized Loss Amount 0.00 0.00 0.00 Cumulative Realized Loss 0.00 0.00 0.00 Percentage of Cumulative Losses 0.0000 0.0000 0.0000 Prepayment Penalties 018,092.0098 021,038.0095 039,131.0093 Special Servicing Fee 0.00 0.00 0.00 Pass-Through Rate 5.~~912598~~912802 5.~~696662~~700637 5.~~814478~~816749

Filing Compare · MASTR Adjustable Rate Mortgages Trust 2004-9