8-K 1 csf04001.txt MAY 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): May 25, 2004 CREDIT SUISSE FIRST BOSTON MORTGAGE SECURITIES CORPORATION Mortgage-Backed Pass-Through Certificates, Series 2004-1 Trust (Exact name of registrant as specified in its charter) New York (governing law of 333-107055-21 54-2144754 Pooling and Servicing Agreement) (Commission 54-2144751 (State or other File Number) 54-2144752 jurisdiction 54-2144753 of Incorporation) IRS EIN 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) ITEM 5. Other Events On May 25, 2004 a distribution was made to holders of CREDIT SUISSE FIRST BOSTON MORTGAGE SECURITIES CORPORATION, Mortgage-Backed Pass-Through Certificates, Series 2004-1 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-Backed Pass-Through Certificates, Series 2004-1 Trust, relating to the May 25, 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. CREDIT SUISSE FIRST BOSTON MORTGAGE SECURITIES CORPORATION Mortgage-Backed Pass-Through Certificates, Series 2004-1 Trust By: Wells Fargo Bank, N.A. as Trust Administrator By: /s/ Beth Belfield as Assistant Vice President By: Beth Belfield as Assistant Vice President Date: 5/26/04 INDEX TO EXHIBITS Exhibit Number Description EX-99.1 Monthly report distributed to holders of Mortgage- Backed Pass-Through Certificates, Series 2004-1 Trust, relating to the May 25, 2004 distribution. EX-99.1

Credit Suisse First Boston Mortgage Securities Corp. Mortgage-Backed Pass-Through Certificates Record Date: 24/2930/~~2004~~04 Distribution Date: 35/25/~~2004~~04 CSF Series: 2004-1 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 I-A1 22541SAG3 SEN 5.75000% ~~140~~132,~~000~~528,~~000~~193.0051 ~~670~~635,~~833~~030.3693 28,~~096~~473,~~171~~524.0771 I-A-2 22541SAH1 SEN 5.75000% 1,835,306.00 8,794.1718 0.00 I-A-3 22541SAJ7 SEN 5.75000% 15,759,000.00 75,511.88 0.00 II-A-1 22541SAL2 SEN 6.50000% 3432,~~480~~845,~~922~~500.0086 ~~186~~177,~~771~~913.6714 ~~803~~1,~~391~~385,409.7948 II-A-2 22541SAM0 SEN 6.00000% 3837,~~882~~038,~~743~~544.0064 ~~194~~185,~~413~~192.7273 ~~905~~1,~~952~~562,270.4731 III-A-1 22541SAN8 SEN 7.00000% 4139,~~956~~459,~~092~~870.0064 ~~244~~230,~~743~~182.8859 ~~896~~2,~~077~~188,449.7547 IV-A-1 22541SAP3 SEN 5.00000% 4038,~~005~~327,~~655~~859.0099 ~~166~~159,~~690~~699.2443 ~~932~~1,~~029~~012,391.5239 V-A-1 22541SAQ1 SEN 5.50000% 2422,~~550~~808,~~484~~576.0051 ~~112~~104,~~523~~539.0632 53636,~~840~~322.9245 I-X 22541SAR9 IO 5.75000% 0.00 9892,~~240~~127.1955 0.00 D-X-1 22541SAS7 IO 7.00000% 0.00 2927,~~659~~728.5161 0.00 D-X-2 22541SAT5 IO 5.00000% 0.00 4239,~~875~~512.6839 0.00 I-P 22541SAU2 PO 0.00000% ~~329~~326,~~084~~706.7583 0.00 ~~751~~374.6330 D-P-1 22541SAV0 PO 0.00000% ~~422~~395,~~802~~846.9676 0.00 1411,~~078~~280.2314 D-P-2 22541SAW8 PO 0.00000% ~~376~~372,~~255~~928.6521 0.00 1,~~606~~673.6691 AR 22541SBA5 RES 5.75000% 500.00 0.2500 500.00 AR-L 22541SBB3 RES 5.75000% 500.00 0.2400 500.00 D-B-1 22541SAX6 SUB 5.~~90334~~90400% 11,~~456~~427,~~339~~625.0031 56,~~358~~223.8895 14,~~319~~531.4101 D-B-2 22541SAY4 SUB 5.~~90334~~90400% 2,~~727~~720,~~699~~862.0041 13,~~418~~386.7865 3,~~409~~459.3876 D-B-3 22541SAZ1 SUB 5.~~90334~~90400% 3,~~273~~265,~~239~~035.0009 16,~~102~~063.5498 4,~~091~~151.2672 D-B-4 22541SBC1 SUB 5.~~90334~~90400% 43,~~000~~990,~~626~~599.00 19,~~680~~633.8876 5,~~000~~074.4332 D-B-5 22541SBD9 SUB 5.~~90334~~90400% 2,~~727~~720,~~699~~862.0041 13,~~418~~386.7865 3,~~409~~459.3876 D-B-6 22541SBE7 SUB 5.~~90334~~90400% ~~909~~906,~~235~~956.0080 4,~~472~~462.9423 1,~~136~~154.4681 Totals ~~363~~346,~~693~~730,~~282~~274.3697 1,~~954~~859,~~510~~389.6597 515,~~735~~303,~~366~~527.3654

Certificateholder Distribution Summary (continued) Current Ending Cumulative Realized Certificate Total Realized Class Loss Balance Distribution Losses I-A1 0.00 ~~137~~124,~~903~~054,~~828~~668.9380 29,~~767~~108,~~004~~555.4364 0.00 I-A-2 0.00 1,835,306.00 8,794.1718 0.00 I-A-3 0.00 15,759,000.00 75,511.88 0.00 II-A-1 0.00 3331,~~677~~460,~~530~~091.2138 ~~990~~1,~~163~~563,322.4662 0.00 II-A-2 0.00 3735,~~976~~476,~~790~~274.5332 1,~~100~~747,~~366~~463.1904 0.00 III-A-1 0.00 4137,~~060~~271,~~014~~421.2517 12,~~140~~418,~~821~~632.6306 0.00 IV-A-1 0.00 3937,~~073~~315,~~625~~468.4860 1,~~098~~172,~~719~~090.7682 0.00 V-A-1 0.00 2422,~~496~~172,~~643~~254.0806 ~~166~~740,~~363~~861.9877 0.00 I-X 0.00 0.00 9892,~~240~~127.1955 0.00 D-X-1 0.00 0.00 2927,~~659~~728.5161 0.00 D-X-2 0.00 0.00 4239,~~875~~512.6839 0.00 I-P 0.00 ~~328~~326,~~333~~332.1253 ~~751~~374.6330 0.00 D-P-1 0.00 ~~408~~384,~~724~~566.7362 1411,~~078~~280.2314 0.00 D-P-2 0.00 ~~374~~371,~~648~~254.9931 1,~~606~~673.6691 0.00 AR 0.00 0.00 500.2500 0.00 AR-L 0.00 0.00 500.2400 0.00 D-B-1 0.00 11,~~442~~413,~~019~~094.5929 70,~~678~~754.2996 0.00 D-B-2 0.00 2,~~724~~717,~~289~~402.6265 16,~~828~~846.1641 0.00 D-B-3 0.00 3,~~269~~260,~~147~~883.7437 20,~~193~~215.8070 0.00 D-B-4 0.00 3,~~995~~985,~~625~~524.5767 24,~~681~~708.3108 0.00 D-B-5 0.00 2,~~724~~717,~~289~~402.6265 16,~~828~~846.1641 0.00 D-B-6 0.00 ~~908~~905,~~099~~801.2199 5,~~609~~617.4004 0.00 Totals 0.00 ~~357~~331,~~957~~426,~~916~~747.6741 717,~~689~~162,~~877~~917.0151 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) I-A1 140,000,000.00 ~~140~~132,~~000~~528,~~000~~193.0051 ~~137~~130,~~065~~600.4166 18,~~959~~342,~~105~~924.6605 0.00 0.00 I-A-2 1,835,306.00 1,835,306.00 0.00 0.00 0.00 0.00 I-A-3 15,759,000.00 15,759,000.00 0.00 0.00 0.00 0.00 II-A-1 34,480,922.00 3432,~~480~~845,~~922~~500.0086 3029,~~737~~771.2232 ~~772~~1,~~654~~355,638.5716 0.00 0.00 II-A-2 38,882,743.00 3837,~~882~~038,~~743~~544.0064 3433,~~661~~571.1291 ~~871~~1,~~291~~528,698.3540 0.00 0.00 III-A-1 41,956,092.00 4139,~~956~~459,~~092~~870.0064 3028,~~148~~896.2872 ~~865~~2,~~929~~159,552.4676 0.00 0.00 IV-A-1 40,005,655.00 4038,~~005~~327,~~655~~859.0099 ~~136~~134,~~231~~074.6469 ~~795~~878,~~797~~316.8870 0.00 0.00 V-A-1 24,550,484.00 2422,~~550~~808,~~484~~576.0051 5251,~~630~~123.4065 1585,~~210~~198.5381 0.00 0.00 I-X 0.00 0.00 0.00 0.00 0.00 0.00 D-X-1 0.00 0.00 0.00 0.00 0.00 0.00 D-X-2 0.00 0.00 0.00 0.00 0.00 0.00 I-P 329,084.75 ~~329~~326,~~084~~706.7583 ~~350~~351.0079 ~~401~~22.6351 0.00 0.00 D-P-1 422,802.96 ~~422~~395,~~802~~846.9676 ~~390~~370.6670 1310,~~687~~909.5744 0.00 0.00 D-P-2 376,255.65 ~~376~~372,~~255~~928.6521 1,~~510~~524.7397 95148.93 0.00 0.00 AR 50.00 500.00 30.2700 460.7300 0.00 0.00 AR-L 50.00 500.00 30.2700 460.7300 0.00 0.00 D-B-1 11,456,339.00 11,~~456~~427,~~339~~625.0031 14,~~319~~531.4101 0.00 0.00 0.00 D-B-2 2,727,699.00 2,~~727~~720,~~699~~862.0041 3,~~409~~459.3876 0.00 0.00 0.00 D-B-3 3,273,239.00 3,~~273~~265,~~239~~035.0009 4,~~091~~151.2672 0.00 0.00 0.00 D-B-4 4,000,626.00 43,~~000~~990,~~626~~599.00 5,~~000~~074.4332 0.00 0.00 0.00 D-B-5 2,727,699.00 2,~~727~~720,~~699~~862.0041 3,~~409~~459.3876 0.00 0.00 0.00 D-B-6 909,235.00 ~~909~~906,~~235~~956.0080 1,~~136~~154.4681 0.00 0.00 0.00 Totals 363,693,282.36 ~~363~~346,~~693~~730,~~282~~274.3697 ~~455~~442,~~098~~117.3279 514,~~280~~861,~~268~~409.0476 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 I-A1 28,~~096~~473,~~171~~524.0771 ~~137~~124,~~903~~054,~~828~~668.9380 0.~~98502735~~88610478 28,~~096~~473,~~171~~524.0771 I-A-2 0.00 1,835,306.00 1.00000000 0.00 I-A-3 0.00 15,759,000.00 1.00000000 0.00 II-A-1 ~~803~~1,~~391~~385,409.7948 3331,~~677~~460,~~530~~091.2138 0.~~97670040~~91239125 ~~803~~1,~~391~~385,409.7948 II-A-2 ~~905~~1,~~952~~562,270.4731 3735,~~976~~476,~~790~~274.5332 0.~~97670040~~91239125 ~~905~~1,~~952~~562,270.4731 III-A-1 ~~896~~2,~~077~~188,449.7547 4137,~~060~~271,~~014~~421.2517 0.~~97864249~~88834349 ~~896~~2,~~077~~188,449.7547 IV-A-1 ~~932~~1,~~029~~012,391.52 39 37,~~073~~315,~~625~~468.4860 0.~~97670256~~93275485 ~~932~~1,~~029~~012,391.5239 V-A-1 53636,~~840~~322.9245 2422,~~496~~172,~~643~~254.0806 0.~~99780693~~90312900 53636,~~840~~322.9245 I-X 0.00 0.00 0.00000000 0.00 D-X-1 0.00 0.00 0.00000000 0.00 D-X-2 0.00 0.00 0.00000000 0.00 I-P ~~751~~374.6330 ~~328~~326,~~333~~332.1253 0.~~99771600~~99163674 ~~751~~374.6330 D-P-1 1411,~~078~~280.2314 ~~408~~384,~~724~~566.7362 0.~~96670262~~90956464 1411,~~078~~280.2314 D-P-2 1,~~606~~673.6691 ~~374~~371,~~648~~254.9931 0.~~99572987~~98670760 1,~~606~~673.6691 AR 500.00 0.00 0.00000000 500.00 AR-L 500.00 0.00 0.00000000 500.00 D-B-1 14,~~319~~531.4101 11,~~442~~413,~~019~~094.5929 0.~~99875009~~99622526 14,~~319~~531.4101 D-B-2 3,~~409~~459.3876 2,~~724~~717,~~289~~402.6265 0.~~99875009~~99622526 3,~~409~~459.3876 D-B-3 4,~~091~~151.2672 3,~~269~~260,~~147~~883.7437 0.~~99875009~~99622526 4,~~091~~151.2672 D-B-4 5,~~000~~074.4332 3,~~995~~985,~~625~~524.5767 0.~~99875009~~99622526 5,~~000~~074.4332 D-B-5 3,~~409~~459.3876 2,~~724~~717,~~289~~402.6265 0.~~99875009~~99622526 3,~~409~~459.3876 D-B-6 1,~~136~~154.4681 ~~908~~905,~~099~~801.2199 0.~~99875083~~99622429 1,~~136~~154.4681 Totals 515,~~735~~303,~~366~~527.3654 ~~357~~331,~~957~~426,~~916~~747.6741 0.~~98423021~~91128092 515,~~735~~303,~~366~~527.3654

Principal Distribution Factors Statement Original Beginning Scheduled Unscheduled Face Certificate Principal Principal Class (2) Amount Balance Distribution Distribution Accretion I-A1 140,000,000.00 ~~1000~~946.~~00000000~~62995364 0.~~97903864~~93286186 1359.~~99361186~~59231464 0.00000000 I-A-2 1,835,306.00 1000.00000000 0.00000000 0.00000000 0.00000000 I-A-3 15,759,000.00 1000.00000000 0.00000000 0.00000000 0.00000000 II-A-1 34,480,922.00 ~~1000~~952.~~00000000~~57026074 0.~~89142686~~86341427 2239.~~40817603~~31560067 0.00000000 II-A-2 38,882,743.00 ~~1000~~952.~~00000000~~57026080 0.~~89142682~~86341414 2239.~~40817604~~31560075 0.00000000 III-A-1 41,956,092.00 ~~1000~~940.~~00000000~~50395923 0.~~71856740~~68873717 2051.~~63894464~~47173288 0.00000000 IV-A-1 40,005,655.00 ~~1000~~958.~~00000000~~06105387 3.~~40530957~~35139345 1921.~~89213475~~95481364 0.00000000 V-A-1 24,550,484.00 ~~1000~~929.~~00000000~~04793690 2.~~14376222~~08238868 023.~~04930779~~83654880 0.00000000 I-X 0.00 0.00000000 0.00000000 0.00000000 0.00000000 D-X-1 0.00 0.00000000 0.00000000 0.00000000 0.00000000 D-X-2 0.00 0.00000000 0.00000000 0.00000000 0.00000000 I-P 329,084.75 ~~1000~~992.~~00000000~~77414101 1.~~06355582~~06899514 10.~~22044549~~06840183 0.00000000 D-P-1 422,802.96 ~~1000~~936.~~00000000~~24406035 0.~~92397650~~87676775 3225.~~37340155~~80265758 0.00000000 D-P-2 376,255.65 ~~1000~~991.~~00000000~~15643845 4.~~01516894~~05301555 0.~~25495963~~39582130 0.00000000 AR 50.00 ~~1000~~0.00000000 650.~~40000000~~00000000 ~~934~~0.~~60000000~~00000000 0.00000000 AR-L 50.00 ~~1000~~0.00000000 650.~~40000000~~00000000 ~~934~~0.~~60000000~~00000000 0.00000000 D-B-1 11,456,339.00 ~~1000~~997.~~00000000~~49364173 1.~~24991151~~26838164 0.00000000 0.00000000 D-B-2 2,727,699.00 ~~1000~~997.~~00000000~~49364208 1.~~24991064~~26838042 0.00000000 0.00000000 D-B-3 3,273,239.00 ~~1000~~997.~~00000000~~49364162 1.~~24991178~~26838279 0.00000000 0.00000000 D-B-4 4,000,626.00 ~~1000~~997.~~00000000~~49364224 1.~~24991189~~26838150 0.00000000 0.00000000 D-B-5 2,727,699.00 ~~1000~~997.~~00000000~~49364208 1.~~24991064~~26838042 0.00000000 0.00000000 D-B-6 909,235.00 ~~1000~~997.~~00000000~~49437714 1.~~24990789~~27008969 0.00000000 0.00000000 (2) 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 I-A1 0.00000000 1460.~~97265050~~52517650 ~~985~~886.~~02734950~~10477714 0.~~98502735~~88610478 1460.~~97265050~~52517650 I-A-2 0.00000000 0.00000000 1,000.00000000 1.00000000 0.00000000 I-A-3 0.00000000 0.00000000 1,000.00000000 1.00000000 0.00000000 II-A-1 0.00000000 2340.~~29960289~~17901493 ~~976~~912.~~70039711~~39124580 0.~~97670040~~91239125 2340.~~29960289~~17901493 II-A-2 0.00000000 2340.~~29960286~~17901489 ~~976~~912.~~70039714~~39124565 0.~~97670040~~91239125 2340.~~29960286~~17901489 III-A-1 0.00000000 2152.~~35751228~~16046981 ~~978~~888.~~64248772~~34348943 0.~~97864249~~88834349 2152.~~35751228~~16046981 IV-A-1 0.00000000 2325.~~29744432~~30620708 ~~976~~932.~~70255568~~75484678 0.~~97670256~~93275485 2325.~~29744432~~30620708 V-A-1 0.00000000 225.~~19306959~~91893708 ~~997~~903.~~80693041~~12899982 0.~~99780693~~90312900 225.~~19306959~~91893708 I-X 0.00000000 0.00000000 0.00000000 0.00000000 0.00000000 D-X-1 0.00000000 0.00000000 0.00000000 0.00000000 0.00000000 D-X-2 0.00000000 0.00000000 0.00000000 0.00000000 0.00000000 I-P 0.00000000 21.~~28400131~~13739698 ~~997~~991.~~71599869~~63674403 0.~~99771600~~99163674 21.~~28400131~~13739698 D-P-1 0.00000000 3326.~~29737805~~67942533 ~~966~~909.~~70262195~~56463503 0.~~96670262~~90956464 3326.~~29737805~~67942533 D-P-2 0.00000000 4.~~27012857~~44886343 ~~995~~986.~~72987143~~70760160 0.~~99572987~~98670760 4.~~27012857~~44886343 AR 0.00000000 ~~1,000~~0.00000000 0.00000000 0.00000000 ~~1,000~~0.00000000 AR-L 0.00000000 ~~1,000~~0.00000000 0.00000000 0.00000000 ~~1,000~~0.00000000 D-B-1 0.00000000 1.~~24991151~~26838164 ~~998~~996.~~75008849~~22525922 0.~~99875009~~99622526 1.~~24991151~~26838164 D-B-2 0.00000000 1.~~24991064~~26838042 ~~998~~996.~~75008936~~22526166 0.~~99875009~~99622526 1.~~24991064~~26838042 D-B-3 0.00000000 1.~~24991178~~26838279 ~~998~~996.~~75008822~~22525883 0.~~99875009~~99622526 1.~~24991178~~26838279 D-B-4 0.00000000 1.~~24991189~~26838150 ~~998~~996.~~75008811~~22525825 0.~~99875009~~99622526 1.~~24991189~~26838150 D-B-5 0.00000000 1.~~24991064~~26838042 ~~998~~996.~~75008936~~22526166 0.~~99875009~~99622526 1.~~24991064~~26838042 D-B-6 0.00000000 1.~~24990789~~27008969 ~~998~~996.~~75082899~~22428745 0.~~99875083~~99622429 1.~~24990789~~27008969 (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 I-A1 140,000,000.00 5.75000% ~~140~~132,~~000~~528,~~000~~193.0051 ~~670~~635,~~833~~030.3393 0.00 0.00 I-A-2 1,835,306.00 5.75000% 1,835,306.00 8,794.17 0.00 0.00 I-A-3 15,759,000.00 5.75000% 15,759,000.00 75,511.88 0.00 0.00 II-A-1 34,480,922.00 6.50000% 3432,~~480~~845,~~922~~500.0086 ~~186~~177,~~771~~913.6613 0.00 0.00 II-A-2 38,882,743.00 6.00000% 3837,~~882~~038,~~743~~544.0064 ~~194~~185,~~413~~192.72 0.00 0.00 III-A-1 41,956,092.00 7.00000% 4139,~~956~~459,~~092~~870.0064 ~~244~~230,~~743~~182.8758 0.00 0.00 IV-A-1 40,005,655.00 5.00000% 4038,~~005~~327,~~655~~859.0099 ~~166~~159,~~690~~699.2342 0.00 0.00 V-A-1 24,550,484.00 5.50000% 2422,~~550~~808,~~484~~576.0051 ~~112~~104,~~523~~539.0531 0.00 0.00 I-X 0.00 5.75000% 2019,~~502~~226,~~300~~618.6612 9892,~~240~~127.1955 0.00 0.00 D-X-1 0.00 7.00000% 54,~~084~~753,~~487~~475.6962 2927,~~659~~728.5161 0.00 0.00 D-X-2 0.00 5.00000% 109,~~290~~482,~~162~~972.8633 4239,~~875~~512.6838 0.00 0.00 I-P 329,084.75 0.00000% ~~329~~326,~~084~~706.7583 0.00 0.00 0.00 D-P-1 422,802.96 0.00000% ~~422~~395,~~802~~846.9676 0.00 0.00 0.00 D-P-2 376,255.65 0.00000% ~~376~~372,~~255~~928.6521 0.00 0.00 0.00 AR 50.00 5.75000% 500.00 0.2400 0.00 0.00 AR-L 50.00 5.75000% 500.00 0.2400 0.00 0.00 D-B-1 11,456,339.00 5.~~90334~~90400% 11,~~456~~427,~~339~~625.0031 56,~~358~~223.8895 0.00 0.00 D-B-2 2,727,699.00 5.~~90334~~90400% 2,~~727~~720,~~699~~862.0041 13,~~418~~386.7865 0.00 0.00 D-B-3 3,273,239.00 5.~~90334~~90400% 3,~~273~~265,~~239~~035.0009 16,~~102~~063.5398 0.00 0.00 D-B-4 4,000,626.00 5.~~90334~~90400% 43,~~000~~990,~~626~~599.00 19,~~680~~633.8876 0.00 0.00 D-B-5 2,727,699.00 5.~~90334~~90400% 2,~~727~~720,~~699~~862.0041 13,~~418~~386.7865 0.00 0.00 D-B-6 909,235.00 5.~~90334~~90400% ~~909~~906,~~235~~956.0080 4,~~472~~462.9423 0.00 0.00 Totals 363,693,282.36 1,~~954~~859,~~510~~389.5690 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 I-A1 0.00 0.00 ~~670~~635,~~833~~030.3693 0.00 ~~137~~124,~~903~~054,~~828~~668.9380 I-A-2 0.00 0.00 8,794.1718 0.00 1,835,306.00 I-A-3 0.00 0.00 75,511.88 0.00 15,759,000.00 II-A-1 0.00 0.00 ~~186~~177,~~771~~913.6714 0.00 3331,~~677~~460,~~530~~091.2138 II-A-2 0.00 0.00 ~~194~~185,~~413~~192.7273 0.00 3735,~~976~~476,~~790~~274.5332 III-A-1 0.00 0.00 ~~244~~230,~~743~~182.8859 0.00 4137,~~060~~271,~~014~~421.2517 IV-A-1 0.00 0.00 ~~166~~159,~~690~~699.2443 0.00 3937,~~073~~315,~~625~~468.4860 V-A-1 0.00 0.00 ~~112~~104,~~523~~539.0632 0.00 2422,~~496~~172,~~643~~254.0806 I-X 0.00 0.00 9892,~~240~~127.1955 0.00 2017,~~165~~705,~~733~~031.6697 D-X-1 0.00 0.00 2927,~~659~~728.5161 0.00 4,~~991~~506,~~092~~805.4291 D-X-2 0.00 0.00 4239,~~875~~512.6839 0.00 109,~~179~~031,~~788~~123.5438 I-P 0.00 0.00 0.00 0.00 ~~328~~326,~~333~~332.1253 D-P-1 0.00 0.00 0.00 0.00 ~~408~~384,~~724~~566.7362 D-P-2 0.00 0.00 0.00 0.00 ~~374~~371,~~648~~254.9931 AR 0.00 0.00 0.2500 0.00 0.00 AR-L 0.00 0.00 0.2400 0.00 0.00 D-B-1 0.00 0.00 56,~~358~~223.8895 0.00 11,~~442~~413,~~019~~094.5929 D-B-2 0.00 0.00 13,~~418~~386.7865 0.00 2,~~724~~717,~~289~~402.6265 D-B-3 0.00 0.00 16,~~102~~063.5498 0.00 3,~~269~~260,~~147~~883.7437 D-B-4 0.00 0.00 19,~~680~~633.8876 0.00 3,~~995~~985,~~625~~524.5767 D-B-5 0.00 0.00 13,~~418~~386.7865 0.00 2,~~724~~717,~~289~~402.6265 D-B-6 0.00 0.00 4,~~472~~462.9423 0.00 ~~908~~905,~~099~~801.2199 Totals 0.00 0.00 1,~~954~~859,~~510~~389.6597 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 I-A1 140,000,000.00 5.75000% ~~1000~~946.~~00000000~~62995364 4.~~79166664~~53593521 0.00000000 0.00000000 I-A-2 1,835,306.00 5.75000% 1000.00000000 4.79166417 0.00000000 0.00000000 I-A-3 15,759,000.00 5.75000% 1000.00000000 4.79166698 0.00000000 0.00000000 II-A-1 34,480,922.00 6.50000% ~~1000~~952.~~00000000~~57026074 5.~~41666664~~15975559 0.00000000 0.00000000 II-A-2 38,882,743.00 6.00000% ~~1000~~952.~~00000000~~57026080 54.~~00000013~~76285122 0.00000000 0.00000000 III-A-1 41,956,092.00 7.00000% ~~1000~~940.~~00000000~~50395923 5.~~83333333~~48627313 0.00000000 0.00000000 IV-A-1 40,005,655.00 5.00000% ~~1000~~958.~~00000000~~06105387 43.~~16666669~~99192114 0.00000000 0.00000000 V-A-1 24,550,484.00 5.50000% ~~1000~~929.~~00000000~~04793690 4.~~58333327~~25813642 0.00000000 0.00000000 I-X 0.00 5.75000% ~~1000~~937.~~00000000~~77856636 4.~~79166663~~49352253 0.00000000 0.00000000 D-X-1 0.00 7.00000% ~~1000~~934.~~00000000~~89765534 5.~~83333303~~45357009 0.00000000 0.00000000 D-X-2 0.00 5.00000% ~~1000~~921.~~00000000~~55706951 43.~~16666680~~83982067 0.00000000 0.00000000 I-P 329,084.75 0.00000% ~~1000~~992.~~00000000~~77414101 0.00000000 0.00000000 0.00000000 D-P-1 422,802.96 0.00000% ~~1000~~936.~~00000000~~24406035 0.00000000 0.00000000 0.00000000 D-P-2 376,255.65 0.00000% ~~1000~~991.~~00000000~~15643845 0.00000000 0.00000000 0.00000000 AR 50.00 5.75000% ~~1000~~0.00000000 40.~~80000000~~00000000 0.00000000 0.00000000 AR-L 50.00 5.75000% ~~1000~~0.00000000 40.~~80000000~~00000000 0.00000000 0.00000000 D-B-1 11,456,339.00 5.~~90334~~90400% ~~1000~~997.~~00000000~~49364173 4.~~91944940~~90767164 0.00000000 0.00000000 D-B-2 2,727,699.00 5.~~90334~~90400% ~~1000~~997.~~00000000~~49364208 4.~~91945042~~90767126 0.00000000 0.00000000 D-B-3 3,273,239.00 5.~~90334~~90400% ~~1000~~997.~~00000000~~49364162 4.~~91944829~~90767096 0.00000000 0.00000000 D-B-4 4,000,626.00 5.~~90334~~90400% ~~1000~~997.~~00000000~~49364224 4.~~91945011~~90767195 0.00000000 0.00000000 D-B-5 2,727,699.00 5.~~90334~~90400% ~~1000~~997.~~00000000~~49364208 4.~~91945042~~90767126 0.00000000 0.00000000 D-B-6 909,235.00 5.~~90334~~90400% ~~1000~~997.~~00000000~~49437714 4.~~91945427~~90767513 0.00000000 0.00000000 (5) ~~Per~~The $servicing of mortgage loans by Fairbanks transferred to Wells Fargo on April 1, ~~denomination~~2004. Servicing transfers can result in a tempo

Interest Distribution Factors Statement (continued) Remaining Ending Non-Supported Total Unpaid Certificate/ Interest Realized Interest Interest Notional Class Shortfall Losses (6) Distribution Shortfall Balance I-A1 0.00000000 0.00000000 4.~~79166686~~53593521 0.00000000 ~~985~~886.~~02734950~~10477714 I-A-2 0.00000000 0.00000000 4.~~79166417~~79166962 0.00000000 1000.00000000 I-A-3 0.00000000 0.00000000 4.79166698 0.00000000 1000.00000000 II-A-1 0.00000000 0.00000000 5.~~41666693~~15975588 0.00000000 ~~976~~912.~~70039711~~39124580 II-A-2 0.00000000 0.00000000 54.~~00000013~~76285148 0.00000000 ~~976~~912.~~70039714~~39124565 III-A-1 0.00000000 0.00000000 5.~~83333357~~48627336 0.00000000 ~~978~~888.~~64248772~~34348943 IV-A-1 0.00000000 0.00000000 43.~~16666694~~99192139 0.00000000 ~~976~~932.~~70255568~~75484678 V-A-1 0.00000000 0.00000000 4.~~58333367~~25813683 0.00000000 ~~997~~903.~~80693041~~12899982 I-X 0.00000000 0.00000000 4.~~79166663~~49352253 0.00000000 ~~983~~863.~~58393989~~56318072 D-X-1 0.00000000 0.00000000 5.~~83333303~~45357009 0.00000000 ~~981~~886.~~63133128~~38348341 D-X-2 0.00000000 0.00000000 43.~~16666680~~83982164 0.00000000 ~~989~~877.~~27380242~~64630190 I-P 0.00000000 0.00000000 0.00000000 0.00000000 ~~997~~991.~~71599869~~63674403 D-P-1 0.00000000 0.00000000 0.00000000 0.00000000 ~~966~~909.~~70262195~~56463503 D-P-2 0.00000000 0.00000000 0.00000000 0.00000000 ~~995~~986.~~72987143~~70760160 AR 0.00000000 0.00000000 50.00000000 0.00000000 0.00000000 AR-L 0.00000000 0.00000000 40.~~80000000~~00000000 0.00000000 0.00000000 D-B-1 0.00000000 0.00000000 4.~~91944940~~90767164 0.00000000 ~~998~~996.~~75008849~~22525922 D-B-2 0.00000000 0.00000000 4.~~91945042~~90767126 0.00000000 ~~998~~996.~~75008936~~22526166 D-B-3 0.00000000 0.00000000 4.~~91945134~~90767096 0.00000000 ~~998~~996.~~75008822~~22525883 D-B-4 0.00000000 0.00000000 4.~~91945011~~90767195 0.00000000 ~~998~~996.~~75008811~~22525825 D-B-5 0.00000000 0.00000000 4.~~91945042~~90767126 0.00000000 ~~998~~996.~~75008936~~22526166 D-B-6 0.00000000 0.00000000 4.~~91945427~~90767513 0.00000000 ~~998~~996.~~75082899~~22428745 (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 717,~~787~~243,~~970~~312.0206 Liquidations, Insurance Proceeds, Reserve Funds 0.00 Proceeds from Repurchased Loans 0.00 Other Amounts (Servicer Advances) 018,020.0069 Realized Loss (Gains, Subsequent Expenses & Recoveries) 0.00 Prepayment Penalties 0.00 Total Deposits 717,~~787~~261,~~970~~332.0275 Withdrawals Reimbursement for Servicer Advances 05,065.0076 Payment of Service Fee 9893,~~093~~349.0148 Payment of Interest and Principal 717,~~689~~162,~~877~~917.0151 Total Withdrawals (Pool Distribution Amount) 717,~~787~~261,~~970~~332.0275 Ending Balance 0.00

SERVICING FEES Gross Servicing Fee 7572,~~769~~235.5045 External MS Fee 3,~~758~~610.6797 PMI Fee 1615,~~291~~335.7595 Trust Administrator Fee 2,~~273~~167.0911 Supported Prepayment/Curtailment Interest Shortfall 0.00 Net Servicing Fee 9893,~~093~~349.0148

Delinquency Status By Groups

~~Original$~~DELINQUENT ~~Original~~BANKRUPTCY FORECLOSURE REO Total G1 30Y Conf AltA No of Loans No of Loans No of Loans No of Loans No of Loans Principal Balance Principal Balance Principal Balance Principal Balance Principal Balance 0-29 Days 0 0 0 0 0.00 0.00 0.00 0.00 30 Days 3 0 0 0 3 1,007,172.16 0.00 0.00 0.00 1,007,172.16 60 Days 0 0 0 0 0 0.00 0.00 0.00 0.00 0.00 90 Days 0 0 0 0 0 0.00 0.00 0.00 0.00 0.00 120 Days 0 0 0 0 0 0.00 0.00 0.00 0.00 0.00 150 Days 0 0 0 0 0 0.00 0.00 0.00 0.00 0.00 180 Days 0 0 0 0 0 0.00 0.00 0.00 0.00 0.00 Totals 3 0 0 0 3 1,007,172.16 0.00 0.00 0.00 1,007,172.16 0-29 Days 0.000000% ~~Current$~~0.000000% ~~Currrent~~0.000000% ~~Bankruptcy~~0.000000% ~~142~~0.000000% 0.000000% 0.000000% 0.000000% 30 Days 0.759494% 0.000000% 0.000000% 0.000000% 0.759494% 0.655130% 0.000000% 0.000000% 0.000000% 0.655130% 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 0.759494% 0.000000% 0.000000% 0.000000% 0.759494% 0.655130% 0.000000% 0.000000% 0.000000% 0.655130% DELINQUENT BANKRUPTCY FORECLOSURE REO Total G2 30Y Conf AltA 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 5 0 0 0 5 1,~~759~~064,301.32 0.00 0.~~03925258%~~00 ~~142~~0.00 1,~~759~~064,301.32 60 Days 1 0 0 0 1 97,850.81 0.00 0.~~03988150%~~00 ~~Fraud~~0.00 797,~~273~~850.81 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 6 0 0 0 6 1,~~865~~162,152.6613 20.~~00000000%~~00 70.00 0.00 1,~~273~~162,~~865~~152.6613 20-29 Days 0.~~03204492~~000000% ~~Special~~0.000000% ~~Hazard~~0.000000% 30.000000% 0.000000% 0.000000% 0.000000% 0.000000% 30 Days 1.106195% 0.000000% 0.000000% 0.000000% 1.106195% 1.462713% 0.000000% 0.000000% 0.000000% 1.462713% 60 Days 0.221239% 0.000000% 0.000000% 0.000000% 0.221239% 0.134480% 0.000000% 0.000000% 0.000000% 0.134480% 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 1.327434% 0.000000% 0.000000% 0.000000% 1.327434% 1.597193% 0.000000% 0.000000% 0.000000% 1.597193% DELINQUENT BANKRUPTCY FORECLOSURE REO Total G3 30Y Conf AltA 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 4 0 0 0 4 479,~~636~~760.78 0.00 0.00 0.00 479,~~933~~760.78 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 4 0 0 0 4 479,760.78 0.00 0.00 0.00 479,760.78 0-29 Days 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 30 Days 1.~~00000005~~374570% 30.000000% 0.000000% 0.000000% 1.374570% 1.186310% 0.000000% 0.000000% 0.000000% 1.186310% 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 1.374570% 0.000000% 0.000000% 0.000000% 1.374570% 1.186310% 0.000000% 0.000000% 0.000000% 1.186310% DELINQUENT BANKRUPTCY FORECLOSURE REO Total G4 15Y Jumbo AltA 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 0 0 0 0 0 0.00 0.00 0.00 0.00 0.00 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 0 0 0 0 0 0.00 0.00 0.00 0.00 0.00 0-29 Days 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 30 Days 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 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 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% DELINQUENT BANKRUPTCY FORECLOSURE REO Total G5 15Y Conf AltA 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 1 0 0 0 1 86,~~636~~374.10 0.00 0.00 0.00 86,~~933~~374.10 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 1 0 0 0 1 86,374.~~01602251~~10 0.00 0.00 0.00 86,374.10 0-29 Days 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 30 Days 0.625000% 0.000000% 0.000000% 0.000000% 0.625000% 0.356979% 0.000000% 0.000000% 0.000000% 0.356979% 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 0.625000% 0.000000% 0.000000% 0.000000% 0.625000% 0.356979% 0.000000% 0.000000% 0.000000% 0.356979%

~~DELINQUENT~~COLLATERAL ~~BANKRUPTCY~~STATEMENT ~~FORECLOSURE~~Collateral ~~REO~~Description ~~Total~~Mixed G1Fixed ~~30Y~~Weighted ~~Conf~~Average ~~AltA~~Gross NoCoupon ~~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~~6.00 0.00 0.00 0.00 30 Days 0 0 0 0 0 0.00 0.00 0.00 0.00 0.00 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 0 0 0 0 0 0.00 0.00 0.00 0.00 0.00 0-29 Days 0.000000758242% ~~0.000000%~~Weighted ~~0.000000%~~Average ~~0.000000%~~Net ~~0.000000%~~Coupon 06.~~000000~~508243% ~~0.000000%~~Weighted ~~0.000000%~~Average 30Pass-Through ~~Days~~Rate 06.~~000000~~435169% ~~0.000000%~~Weighted ~~0.000000%~~Average ~~0.000000%~~Maturity(Stepdown ~~0.000000%~~Calculation ~~0.000000%~~) ~~0.000000%~~357 ~~0.000000%~~Beginning ~~0.000000%~~Scheduled ~~0.000000%~~Collateral 60Loan ~~Days~~Count ~~0.000000%~~1,431 ~~0.000000%~~Number ~~0.000000%~~Of 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 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% DELINQUENT BANKRUPTCY FORECLOSURE REO Total G2 30Y Conf AltA No of Loans NoPaid ofIn ~~Loans~~Full No54 ofEnding ~~Loans~~Scheduled NoCollateral ofLoan ~~Loans~~Count No1,377 ofBeginning ~~Loans~~Scheduled ~~Principal~~Collateral Balance ~~Principal~~346,730,273.41 ~~Balance~~Ending ~~Principal~~Scheduled ~~Balance~~Collateral ~~Principal~~ Balance ~~Principal Balance 0-29 Days 0 0 0 0 0~~331,426,747.0041 ~~0.00~~Ending ~~0.00~~Actual ~~0.00~~Collateral 30 Days 0 0 0 0 0 0.00 0.00 0.00 0.00 0.00 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 0 0 0 0 0 0.00 0.00 0.00 0.00 0.00 0-29 Days 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 30 Days 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 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 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% DELINQUENT BANKRUPTCY FORECLOSURE REO Total G3 30Y Conf AltA No of Loans No of Loans No of Loans No of Loans No of Loans Principal Balance ~~Principal~~at ~~Balance Principal Balance Principal Balance Principal Balance 0-29 Days 0 0 0 0 0.00 0.00 0.00 0.00~~ 30 Days 0 0 0 0 0 0.00 0.00 0.00 0.00 0.00 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 0 0 0 0 0 0.00 0.00 0.00 0.00 0.00 0-29 Days 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 30 Days 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 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 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% DELINQUENT BANKRUPTCY FORECLOSURE REO Total G4 15Y Jumbo AltA 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 0Apr-292004 ~~Days 0 0 0 0 0~~331,701,269.0019 ~~0.00~~Monthly ~~0.00~~P ~~0.00~~&I 30Constant ~~Days 0 0 0 0 0 0~~2,394,855.0062 ~~0.00~~Special ~~0.00~~Servicing ~~0.00~~Fee 0.00 60Prepayment ~~Days~~Penalties 0 ~~0 0 0 0 0~~.00 ~~0.00~~Realized ~~0.00~~Loss ~~0.00~~Amount 0.00 90Cumulative ~~Days~~Realized 0Loss 0 ~~0 0 0 0~~.00 ~~0.00~~Class ~~0.00~~A ~~0.00~~Optimal ~~0.00~~Amount ~~120 Days 0 0 0 0 0 0~~17,007,928.0083 ~~0.00~~Ending ~~0.00~~Scheduled ~~0.00~~Balance ~~0.00~~for ~~150~~Premium ~~Days~~Loans ~~0 0 0 0 0 0~~331,426,747.0041 ~~0.00~~Scheduled ~~0.00~~Principal 0442,116.0024 ~~0.00~~Unscheduled 180 Days 0 0 0 0 0 0.00 0.00 0.00 0.00 0.00 Totals 0 0 0 0 0 0.00 0.00 0.00 0.00 0.00 0-29 Days 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 30 Days 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 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 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% DELINQUENT BANKRUPTCY FORECLOSURE REO Total G5 15Y Conf AltA 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~~14,861,409.00 0.00 0.00 0.00 30 Days 0 0 0 0 0 0.00 0.00 0.00 0.00 0.00 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 0 0 0 0 0 0.00 0.00 0.00 0.00 0.00 0-29 Days 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 30 Days 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 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 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000%76

~~COLLATERAL~~Group ~~STATEMENT~~Level Collateral Statement Group G1 30Y Conf AltA G2 30Y Conf AltA G3 30Y Conf AltA Collateral Description Mixed Fixed ~~Weighted~~Mixed ~~Average~~Fixed ~~Gross~~Mixed ~~Coupon~~Fixed ~~6.772531%~~ Weighted Average ~~Net~~ Coupon Rate 6.~~522531%~~743649 6.690968 7.784456 Weighted Average ~~Pass-Through~~Net Rate 6.~~448875%~~493649 6.440968 7.534456 Weighted Average Maturity~~(Stepdown~~ ~~Calculation~~353 )352 ~~359~~352 Beginning ~~Scheduled Collateral~~ Loan Count ~~1,486~~413 ~~Number~~468 Of305 Loans Paid In Full 18 ~~Ending~~16 ~~Scheduled~~14 ~~Collateral~~Ending Loan Count ~~1,468~~395 452 291 Beginning Scheduled ~~Collateral~~ Balance ~~363~~162,133,123.06 75,693,~~282~~262.3623 42,610,350.65 Ending ~~Scheduled~~scheduled ~~Collateral~~ Balance ~~357~~153,~~957~~649,~~916~~059.6750 ~~Ending~~72,729,569.61 ~~Actual~~40,419,412.71 ~~Collateral~~Record ~~Balance~~Date at04/30/2004 ~~29-Feb-~~04/30/2004 ~~358~~04/30/2004 Principal And Interest Constant 1,~~253~~052,~~121~~257.75 490,676.20 307,621.94 Scheduled Principal 141,117.00 68,625.19 ~~Monthly~~31,206.61 PUnscheduled &IPrincipal ~~Constant~~8,342,946.56 2,~~507~~895,~~701~~067.8043 ~~Special~~2,159,731.33 Scheduled Interest 911,140.75 422,051.01 276,415.33 Servicing Fees 33,777.74 15,769.45 8,877.17 Master Servicing Fees 0.00 0.00 0.00 Trustee Fee 1,013.35 473.09 266.31 FRY Amount 0.00 ~~Prepayment~~0.00 ~~Penalties~~0.00 Special Hazard Fee 0.00 0.00 0.00 Other Fee 8,899.65 4,476.37 1,108.99 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 867,450.01 401,332.10 266,162.86 Realized Loss Amount 0.00 0.00 0.00 Cumulative Realized Loss 0.00 ~~Class~~0.00 A0.00 ~~Optimal~~Percentage ~~Amount~~of ~~7,535,057~~Cumulative Losses 0.810000 ~~Ending~~0.0000 ~~Scheduled~~0.0000 ~~Balance~~Prepayment ~~for~~Penalties ~~Premium~~0.00 ~~Loans~~0.00 ~~357,957,916~~0.6700 ~~Scheduled~~Special ~~Principal~~Servicing ~~455,098~~Fee 0.3100 ~~Unscheduled~~0.00 ~~Principal~~0.00 ~~5,280,268~~Pass-Through Rate 6.05420280 6.362502 7.495725

Group Level Collateral Statement Group G1G4 ~~30Y~~15Y ~~Conf~~Jumbo AltA G2G5 ~~30Y~~15Y Conf AltA G3Total ~~30Y Conf AltA~~ Collateral Description Mixed Fixed Mixed Fixed Mixed Fixed Weighted Average Coupon Rate 65.~~758382~~879815 6.~~687082~~765915 76.~~802836~~758242 Weighted Average Net Rate 65.~~508382~~629816 6.~~437082~~515917 76.~~552836~~508243 Weighted Average Maturity ~~355~~172 ~~354~~172 ~~354~~357 Beginning Loan Count ~~430~~81 ~~482~~164 ~~319~~1,431 Loans Paid In Full 52 64 554 Ending Loan Count ~~425~~79 ~~476~~160 ~~314~~1,377 Beginning Scheduled Balance ~~169~~41,~~627~~505,~~809~~148.8337 7924,~~206~~788,~~914~~389.0010 45346,~~113~~730,~~773~~273.6341 Ending scheduled Balance ~~167~~40,~~520~~481,~~606~~452.9926 7724,~~481~~147,~~295~~253.3233 44331,~~212~~426,~~783~~747.3841 Record Date 0204/2930/2004 0204/2930/2004 0204/2930/2004 Principal And Interest Constant 1348,~~102,943~~662.3634 ~~512~~195,~~011~~637.5239 ~~325~~2,~~766~~394,855.5362 Scheduled Principal ~~147~~145,~~602~~293.0950 7055,~~625~~873.5894 32442,~~420~~116.3924 Unscheduled Principal 1878,~~959,600~~402.7561 1585,~~654,993~~261.1083 ~~868~~14,~~569~~861,409.8676 Scheduled Interest ~~955~~203,~~341~~368.2784 ~~441~~139,~~385~~763.9445 ~~293~~1,~~346~~952,739.1438 Servicing Fees 358,~~339~~646.1588 165,~~501~~164.4521 972,~~398~~235.7045 Master Servicing Fees 0.00 0.00 0.00 Trustee Fee ~~1,060~~259.1842 ~~495~~154.0394 ~~281~~2,167.9811 FRY Amount 0.00 0.00 0.00 Special Hazard Fee 0.00 0.00 0.00 Other Fee 94,~~478~~210.7530 ~~4,781~~251.3261 118,~~129~~946.8092 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 ~~909~~190,~~463~~252.1924 ~~419~~134,~~608~~192.1469 ~~282~~1,~~535~~859,389.6690 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 0.00 0.00 0.00 Special Servicing Fee 0.00 0.00 0.00 Pass-Through Rate 65.~~433826~~500586 6.~~357144~~496235 76.~~515284~~435169

Group Level Collateral Statement Group G4 15Y Jumbo AltA G5 15Y Conf AltA Total Collateral Description Mixed Fixed Mixed Fixed Mixed Fixed Weighted Average Coupon Rate 5.898433 6.789599 6.772531 Weighted Average Net Rate 5.648433 6.539598 6.522531 Weighted Average Maturity 174 174 359 Beginning Loan Count 84 171 1,486 Loans Paid In Full 2 0 18 Ending Loan Count 82 171 1,468 Beginning Scheduled Balance 43,205,154.02 26,539,631.55 363,693,283.03 Ending scheduled Balance 42,262,067.29 26,481,163.69 357,957,916.67 Record Date 02/29/2004 02/29/2004 02/29/2004 Principal And Interest Constant 359,606.10 207,374.29 2,507,701.80 Scheduled Principal 147,237.17 57,213.08 455,098.31 Unscheduled Principal 795,849.56 1,254.78 5,280,268.05 Scheduled Interest 212,368.93 150,161.21 2,052,603.49 Servicing Fees 9,001.09 5,529.11 75,769.50 Master Servicing Fees 0.00 0.00 0.00 Trustee Fee 270.03 165.87 2,273.09 FRY Amount 0.00 0.00 0.00 Special Hazard Fee 0.00 0.00 0.00 Other Fee 4,407.16 253.39 20,050.42 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 198,690.65 144,212.84 1,954,510.48 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 0.00 0.00 0.00 Special Servicing Fee 0.00 0.00 0.00 Pass-Through Rate 5.518527 6.520642 6.448875

Filing Compare · CSFB MORTGAGE BACKED PASS THRU CERT SERIES 2004-1