8-K 1 csf04ar4_dec.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 27, 2004 CREDIT SUISSE FIRST BOSTON MORTGAGE SECURITIES CORPORATION Mortgage-Backed P/T Certificates, Series 2004-AR4 Trust (Exact name of registrant as specified in its charter) New York (governing law of 333-107055-27 54-2151938 Pooling and Servicing Agreement) (Commission 54-2151939 (State or other File Number) 54-2151940 jurisdiction 54-2151941 of Incorporation) 54-2151942 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) 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 CREDIT SUISSE FIRST BOSTON MORTGAGE SECURITIES CORPORATION, Mortgage-Backed P/T Certificates, Series 2004-AR4 Trust. ITEM 9.01 Financial Statements and Exhibits (c) Exhibits Exhibit Number Description EX-99.1 Monthly report distributed to holders of Mortgage-Backed P/T Certificates, Series 2004-AR4 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. CREDIT SUISSE FIRST BOSTON MORTGAGE SECURITIES CORPORATION Mortgage-Backed P/T Certificates, Series 2004-AR4 Trust (Registrant) 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: 1/4/2005 INDEX TO EXHIBITS Exhibit Number Description EX-99.1 Monthly report distributed to holders of Mortgage-Backed P/T Certificates, Series 2004-AR4 Trust, relating to the December 27, 2004 distribution. EX-99.1

Credit Suisse First Boston Mortgage Securities Corp. Mortgage ~~Pass~~-~~Through~~Backed P/T Certificates Record Date: 1011/3130/2004 Distribution Date: 1112/2627/2004 ~~CSF~~Credit Suisse First Boston Mortgage Securities Corp. Mortgage-Backed P/T Certificates Series: 2004-AR4 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 22541SEY0 SEN 3.~~82697~~82957% ~~129,~~127,~~508~~545,606.4505 ~~411~~404,~~806~~596.2911 1,~~581~~314,~~902~~664.4171 AR 22541SFS2 RES 3.~~84441~~84200% 0.00 0.00 0.00 AR-L 22541SFT0 RES 3.~~84441~~84200% 0.00 0.00 0.00 1-X 22541SFJ2 SEN 0.21700% 0.00 2322,~~350~~926.5616 0.00 2-A-1 22541SEZ7 SEN 4.~~80500~~80101% ~~128~~126,~~789~~634,~~822~~409.2788 ~~515~~506,~~695~~643.7299 21,~~155~~743,~~412~~626.3994 2-A-2 22541SFX1 SEN 3.~~31470~~31071% 14,~~310~~070,~~394~~897.3010 3938,~~528~~820.8652 ~~239~~193,~~497~~741.2093 2-X 22541SFK9 SEN 1.49030% 0.00 17,~~772~~474.3288 0.00 3-A-1 22541SFA1 SEN 4.~~15797~~15509% ~~128~~126,~~988~~283,~~721~~115.7371 ~~446~~437,~~943~~264.1030 23,~~705~~425,~~606~~316.0233 4-A-1 22541SFB9 SEN 4.~~84805~~84528% ~~114~~112,~~420~~724,~~342~~666.0181 ~~462~~455,~~262~~152.4624 12,~~695~~558,~~675~~095.2016 5-A-1 22541SFC7 SEN 2.~~29250~~54000% 8075,~~338~~866,~~420~~570.1921 ~~163~~165,~~711~~937.8505 43,~~471~~058,~~849~~499.9872 5-A-2 22541SFD5 SEN 2.~~30250~~55000% 6359,~~028~~156,~~537~~049.3840 ~~128~~129,~~998~~896.4183 32,~~872~~371,~~487~~255.9879 5-A-3 22541SFE3 SEN 2.~~15250~~40000% 5348,~~771~~900,~~403~~949.3793 ~~102~~101,~~882~~061.6296 42,~~870~~982,~~453~~343.4490 5-A-4 22541SFF0 SEN 2.~~41250~~66000% 25,500,000.00 5458,~~683~~409.3317 0.00 5-A-5 22541SFG8 SEN 2.~~23250~~48000% 1918,~~429~~235,~~265~~526.5394 38,~~556~~942.3098 1730,~~193,738~~966.5964 5-M-1 22541SFH6 MEZ 2.~~53250~~78000% 9,710,000.00 2123,~~858~~244.2966 0.00 5-M-2 22541SFL7 MEZ 3.~~33250~~58000% 4,855,000.00 14,~~381~~966.5989 0.00 5-M-3 22541SFM5 MEZ 3.~~73250~~98000% 4,046,555.00 13,~~425~~868.5744 0.00 C-B-1 22541SFP8 SUB 4.~~45380~~45210% 13,~~583~~577,~~772~~593.8249 50,~~416~~071.1882 6,~~179~~217.3376 C-B-2 22541SFQ6 SUB 4.~~45380~~45210% 6,~~642~~639,~~285~~263.3978 24,~~652~~484.8546 3,~~021~~040.6140 C-B-3 22541SFR4 SUB 4.~~45380~~45210% 3,~~919~~917,~~546~~763.7876 14,~~547~~448.4004 1,~~783~~794.0211 C-B-4 22541SFU7 SUB 4.~~45380~~45210% 2,~~414~~413,~~560~~462.5010 8,~~961~~900.6443 1,~~098~~105.4023 C-B-5 22541SFV5 SUB 4.~~45380~~45210% 3,~~320~~318,~~145~~635.3500 12,~~322~~238.7255 1,~~510~~519.3574 C-B-6 22541SFW3 SUB 4.~~45380~~45210% 1,814,~~833~~008.9436 6,~~735~~689.7675 ~~825~~830.5871 5-X 22541SFN3 OC 0.00000% 1,618,557.78 ~~759~~679,~~519~~883.0107 0.00 Totals ~~809~~786,~~629~~828,~~672~~631.7930 3,~~333~~225,~~012~~922.8330 2218,~~801~~393,~~041~~019.5007

Certificateholder Distribution Summary (continued) Current Ending Cumulative Realized Certificate Total Realized Class Loss Balance Distribution Losses 1-A-1 0.00 ~~127~~126,~~545~~230,~~606~~941.0533 1,~~993~~719,~~708~~260.7082 0.00 AR 0.00 0.00 0.00 0.00 AR-L 0.00 0.00 0.00 0.00 1-X 0.00 0.00 2322,~~350~~926.5616 0.00 2-A-1 0.00 ~~126~~124,~~634~~890,~~409~~782.8894 2,~~671~~250,~~108~~270.1193 0.00 2-A-2 0.00 1413,~~070~~877,~~897~~155.1017 ~~279~~232,~~026~~562.0645 0.00 2-X 0.00 0.00 17,~~772~~474.3288 0.00 3-A-1 0.00 ~~126~~122,~~283~~857,~~115~~799.7138 3,~~152~~862,~~549~~580.1263 0.00 4-A-1 0.00 ~~112~~110,~~724~~166,~~666~~571.8165 23,~~157~~013,~~937~~247.6640 0.00 5-A-1 0.00 7572,~~866~~808,~~570~~070.2149 43,~~635~~224,~~561~~436.8377 0.00 5-A-2 0.00 5956,~~156~~784,~~049~~793.4062 42,~~001~~501,~~486~~152.3962 0.00 5-A-3 0.00 4845,~~900~~918,~~949~~606.9303 43,~~973~~083,~~336~~405.0686 0.00 5-A-4 0.00 25,500,000.00 5458,~~683~~409.3317 0.00 5-A-5 0.00 1817,~~235~~504,~~526~~560.9430 1769,~~232,294~~909.8962 0.00 5-M-1 0.00 9,710,000.00 2123,~~858~~244.2966 0.00 5-M-2 0.00 4,855,000.00 14,~~381~~966.5989 0.00 5-M-3 0.00 4,046,555.00 13,~~425~~868.5744 0.00 C-B-1 0.00 13,~~577~~571,~~593~~375.4973 56,~~595~~289.5158 0.00 C-B-2 0.00 6,~~639~~636,~~263~~223.7837 27,~~674~~524.4686 0.00 C-B-3 0.00 3,~~917~~915,~~763~~969.7665 16,~~330~~242.4215 0.00 C-B-4 0.00 2,~~413~~412,~~462~~356.1088 10,~~060~~005.0466 0.00 C-B-5 0.00 3,~~318~~317,~~635~~115.0026 13,~~833~~758.0729 0.00 C-B-6 0.00 1,~~814~~813,~~008~~177.3665 7,~~561~~520.3446 0.00 5-X 0.00 1,618,557.78 ~~759~~679,~~519~~883.0107 0.00 Totals 0.00 ~~786~~768,~~828~~435,~~631~~612.3023 2621,~~134~~618,~~054~~941.3337 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-1 148,995,000.00 ~~129,~~127,~~508~~545,606.4505 9190,~~167~~648.8159 1,~~490~~224,~~734~~016.6012 0.00 0.00 AR 50.00 0.00 0.00 0.00 0.00 0.00 AR-L 50.00 0.00 0.00 0.00 0.00 0.00 1-X 0.00 0.00 0.00 0.00 0.00 0.00 2-A-1 138,245,000.00 ~~128~~126,~~789~~634,~~822~~409.2788 55,~~882~~435.6905 21,~~099~~688,~~529~~191.7089 0.00 0.00 2-A-2 15,361,000.00 14,~~310~~070,~~394~~897.3010 6,~~209~~159.3763 ~~233~~187,~~287~~582.8330 0.00 0.00 2-X 0.00 0.00 0.00 0.00 0.00 0.00 3-A-1 144,610,000.00 ~~128~~126,~~988~~283,~~721~~115.7371 4140,~~416~~741.7653 23,~~664~~384,~~189~~574.2680 0.00 0.00 4-A-1 126,330,000.00 ~~114~~112,~~420~~724,~~342~~666.0181 38,~~678~~324.6233 12,~~656~~519,~~996~~770.5883 0.00 0.00 5-A-1 97,000,000.00 8075,~~338~~866,~~420~~570.1921 0.00 43,~~471~~058,~~849~~499.9872 0.00 0.00 5-A-2 81,100,000.00 6359,~~028~~156,~~537~~049.3840 0.00 32,~~872~~371,~~487~~255.9879 0.00 0.00 5-A-3 76,500,000.00 5348,~~771~~900,~~403~~949.3793 0.00 42,~~870~~982,~~453~~343.4490 0.00 0.00 5-A-4 25,500,000.00 25,500,000.00 0.00 0.00 0.00 0.00 5-A-5 25,000,000.00 1918,~~429~~235,~~265~~526.5394 0.00 1730,~~193,738~~966.5964 0.00 0.00 5-M-1 9,710,000.00 9,710,000.00 0.00 0.00 0.00 0.00 5-M-2 4,855,000.00 4,855,000.00 0.00 0.00 0.00 0.00 5-M-3 4,046,555.00 4,046,555.00 0.00 0.00 0.00 0.00 C-B-1 13,620,000.00 13,~~583~~577,~~772~~593.8249 6,~~179~~217.3376 0.00 0.00 0.00 C-B-2 6,660,000.00 6,~~642~~639,~~285~~263.3978 3,~~021~~040.6140 0.00 0.00 0.00 C-B-3 3,930,000.00 3,~~919~~917,~~546~~763.7876 1,~~783~~794.0211 0.00 0.00 0.00 C-B-4 2,421,000.00 2,~~414~~413,~~560~~462.5010 1,~~098~~105.4023 0.00 0.00 0.00 C-B-5 3,329,000.00 3,~~320~~318,~~145~~635.3500 1,~~510~~519.3574 0.00 0.00 0.00 C-B-6 1,819,674.00 1,814,~~833~~008.9436 ~~825~~830.5871 0.00 0.00 0.00 5-X 0.00 1,618,557.78 0.00 0.00 0.00 0.00 Totals 929,032,329.00 ~~809~~786,~~629~~828,~~672~~631.7930 ~~247~~245,~~773~~817.5408 2218,~~553~~147,~~267~~201.9699 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 1,~~581~~314,~~902~~664.4171 ~~127~~126,~~545~~230,~~606~~941.0533 0.~~85603951~~84721596 1,~~581~~314,~~902~~664.4171 AR 0.00 0.00 0.00000000 0.00 AR-L 0.00 0.00 0.00000000 0.00 1-X 0.00 0.00 0.00000000 0.00 2-A-1 21,~~155~~743,~~412~~626.3994 ~~126~~124,~~634~~890,~~409~~782.8894 0.~~91601439~~90340181 21,~~155~~743,~~412~~626.3994 2-A-2 ~~239~~193,~~497~~741.2093 1413,~~070~~877,~~897~~155.1017 0.~~91601439~~90340181 ~~239~~193,~~497~~741.2093 2-X 0.00 0.00 0.00000000 0.00 3-A-1 23,~~705~~425,~~606~~316.0233 ~~126~~122,~~283~~857,~~115~~799.7138 0.~~87326683~~84958025 23,~~705~~425,~~606~~316.0233 4-A-1 12,~~695~~558,~~675~~095.2016 ~~112~~110,~~724~~166,~~666~~571.8165 0.~~89230323~~87205392 12,~~695~~558,~~675~~095.2016 5-A-1 43,~~471~~058,~~849~~499.9872 7572,~~866~~808,~~570~~070.2149 0.~~78212959~~75059866 43,~~471~~058,~~849~~499.9872 5-A-2 32,~~872~~371,~~487~~255.9879 5956,~~156~~784,~~049~~793.4062 0.~~72942108~~70018241 32,~~872~~371,~~487~~255.9879 5-A-3 42,~~870~~982,~~453~~343.4490 4845,~~900~~918,~~949~~606.9303 0.~~63922810~~60024322 42,~~870~~982,~~453~~343.4490 5-A-4 0.00 25,500,000.00 1.00000000 0.00 5-A-5 1730,~~193,738~~966.5964 1817,~~235~~504,~~526~~560.9430 0.~~72942108~~70018241 1730,~~193,738~~966.5964 5-M-1 0.00 9,710,000.00 1.00000000 0.00 5-M-2 0.00 4,855,000.00 1.00000000 0.00 5-M-3 0.00 4,046,555.00 1.00000000 0.00 C-B-1 6,~~179~~217.3376 13,~~577~~571,~~593~~375.4973 0.~~99688645~~99642994 6,~~179~~217.3376 C-B-2 3,~~021~~040.6140 6,~~639~~636,~~263~~223.7837 0.~~99688645~~99642994 3,~~021~~040.6140 C-B-3 1,~~783~~794.0211 3,~~917~~915,~~763~~969.7665 0.~~99688645~~99642994 1,~~783~~794.0211 C-B-4 1,~~098~~105.4023 2,~~413~~412,~~462~~356.1088 0.~~99688645~~99642994 1,~~098~~105.4023 C-B-5 1,~~510~~519.3574 3,~~318~~317,~~635~~115.0026 0.~~99688645~~99642994 1,~~510~~519.3574 C-B-6 ~~825~~830.5871 1,~~814~~813,~~008~~177.3665 0.~~99688645~~99642994 ~~825~~830.5871 5-X 0.00 1,618,557.78 0.00000000 0.00 Totals 2218,~~801~~393,~~041~~019.5007 ~~786~~768,~~828~~435,~~631~~612.3023 0.~~84693353~~82713549 2218,~~801~~393,~~041~~019.5007

Principal Distribution Factors Statement Original Beginning Scheduled Unscheduled Face Certificate Principal Principal Class (2) Amount Balance Distribution Distribution Accretion 1-A-1 148,995,000.00 ~~866~~856.~~65665593~~03950502 0.~~61188503~~60840021 108.~~00526595~~21514896 0.00000000 AR 50.00 0.00000000 0.00000000 0.00000000 0.00000000 AR-L 50.00 0.00000000 0.00000000 0.00000000 0.00000000 1-X 0.00 0.00000000 0.00000000 0.00000000 0.00000000 2-A-1 138,245,000.00 ~~931~~916.~~60564411~~01439387 0.~~40422938~~40099136 1512.~~18702087~~21159456 0.00000000 2-A-2 15,361,000.00 ~~931~~916.~~60564416~~01439359 0.~~40422954~~40099147 1512.~~18702103~~21159430 0.00000000 2-X 0.00 0.00000000 0.00000000 0.00000000 0.00000000 3-A-1 144,610,000.00 ~~891~~873.~~97650045~~26682601 0.~~28640315~~28173384 1823.~~42327128~~40484614 0.00000000 4-A-1 126,330,000.00 ~~905~~892.~~72581343~~30322813 0.~~30617130~~30336682 1319.~~11641400~~94594182 0.00000000 5-A-1 97,000,000.00 ~~828~~782.~~23113598~~12958979 0.00000000 4631.~~10154619~~53092495 0.00000000 5-A-2 81,100,000.00 ~~777~~729.~~17062121~~42107768 0.00000000 4729.~~74954353~~23866572 0.00000000 5-A-3 76,500,000.00 ~~702~~639.~~89416170~~22810366 0.00000000 6338.~~66605804~~98488758 0.00000000 5-A-4 25,500,000.00 1000.00000000 0.00000000 0.00000000 0.00000000 5-A-5 25,000,000.00 ~~777~~729.~~17062120~~42107760 0.00000000 4729.~~74954360~~23866560 0.00000000 5-M-1 9,710,000.00 1000.00000000 0.00000000 0.00000000 0.00000000 5-M-2 4,855,000.00 1000.00000000 0.00000000 0.00000000 0.00000000 5-M-3 4,046,555.00 1000.00000000 0.00000000 0.00000000 0.00000000 C-B-1 13,620,000.00 ~~997~~996.~~34014831~~88645301 0.~~45369530~~45651689 0.00000000 0.00000000 C-B-2 6,660,000.00 ~~997~~996.~~34014865~~88645345 0.~~45369520~~45651652 0.00000000 0.00000000 C-B-3 3,930,000.00 ~~997~~996.~~34014758~~88645293 0.~~45369466~~45651654 0.00000000 0.00000000 C-B-4 2,421,000.00 ~~997~~996.~~34014870~~88645188 0.~~45369682~~45651797 0.00000000 0.00000000 C-B-5 3,329,000.00 ~~997~~996.~~34014719~~88645239 0.~~45369480~~45651547 0.00000000 0.00000000 C-B-6 1,819,674.00 ~~997~~996.~~34014994~~88645329 0.~~45369665~~45651584 0.00000000 0.00000000 5-X 0.00 0.00000000 0.00000000 0.00000000 0.00000000 (2) All Classes 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 108.~~61715098~~82354918 ~~856~~847.~~03950502~~21595577 0.~~85603951~~84721596 108.~~61715098~~82354918 AR 0.00000000 0.00000000 0.00000000 0.00000000 0.00000000 AR-L 0.00000000 0.00000000 0.00000000 0.00000000 0.00000000 1-X 0.00000000 0.00000000 0.00000000 0.00000000 0.00000000 2-A-1 0.00000000 1512.~~59125024~~61258592 ~~916~~903.~~01439387~~40180795 0.~~91601439~~90340181 1512.~~59125024~~61258592 2-A-2 0.00000000 1512.~~59125057~~61258577 ~~916~~903.~~01439359~~40180783 0.~~91601439~~90340181 1512.~~59125057~~61258577 2-X 0.00000000 0.00000000 0.00000000 0.00000000 0.00000000 3-A-1 0.00000000 1823.~~70967443~~68657997 ~~873~~849.~~26682601~~58024604 0.~~87326683~~84958025 1823.~~70967443~~68657997 4-A-1 0.00000000 1320.~~42258529~~24930864 ~~892~~872.~~30322813~~05391950 0.~~89230323~~87205392 1320.~~42258529~~24930864 5-A-1 0.00000000 4631.~~10154619~~53092495 ~~782~~750.~~12958979~~59866485 0.~~78212959~~75059866 4631.~~10154619~~53092495 5-A-2 0.00000000 4729.~~74954353~~23866572 ~~729~~700.~~42107768~~18241208 0.~~72942108~~70018241 4729.~~74954353~~23866572 5-A-3 0.00000000 6338.~~66605804~~98488758 ~~639~~600.~~22810366~~24321608 0.~~63922810~~60024322 6338.~~66605804~~98488758 5-A-4 0.00000000 0.00000000 1,000.00000000 1.00000000 0.00000000 5-A-5 0.00000000 4729.~~74954360~~23866560 ~~729~~700.~~42107760~~18241200 0.~~72942108~~70018241 4729.~~74954360~~23866560 5-M-1 0.00000000 0.00000000 1,000.00000000 1.00000000 0.00000000 5-M-2 0.00000000 0.00000000 1,000.00000000 1.00000000 0.00000000 5-M-3 0.00000000 0.00000000 1,000.00000000 1.00000000 0.00000000 C-B-1 0.00000000 0.~~45369530~~45651689 996.~~88645301~~42993612 0.~~99688645~~99642994 0.~~45369530~~45651689 C-B-2 0.00000000 0.~~45369520~~45651652 996.~~88645345~~42993544 0.~~99688645~~99642994 0.~~45369520~~45651652 C-B-3 0.00000000 0.~~45369466~~45651654 996.~~88645293~~42993639 0.~~99688645~~99642994 0.~~45369466~~45651654 C-B-4 0.00000000 0.~~45369682~~45651797 996.~~88645188~~42993804 0.~~99688645~~99642994 0.~~45369682~~45651797 C-B-5 0.00000000 0.~~45369480~~45651547 996.~~88645239~~42993692 0.~~99688645~~99642994 0.~~45369480~~45651547 C-B-6 0.00000000 0.~~45369665~~45651584 996.~~88645329~~42993745 0.~~99688645~~99642994 0.~~45369665~~45651584 5-X 0.00000000 0.00000000 0.00000000 0.00000000 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-1 148,995,000.00 3.~~82697~~82957% ~~129,~~127,~~508~~545,606.4505 ~~411~~407,~~806~~037.2946 0.00 0.00 AR 50.00 3.~~84441~~84200% 0.00 0.00 0.00 0.00 AR-L 50.00 3.~~84441~~84200% 0.00 0.00 0.00 0.00 1-X 0.00 0.21700% ~~129,~~127,~~508~~545,606.4505 23,~~350~~064.5650 0.00 0.00 2-A-1 138,245,000.00 4.~~80500~~80101% ~~128~~126,~~789~~634,~~822~~409.2788 ~~515~~506,~~695~~643.7199 0.00 0.00 2-A-2 15,361,000.00 3.~~31470~~31071% 14,~~310~~070,~~394~~897.3010 3938,~~528~~820.8652 0.00 0.00 2-X 0.00 1.49030% 14,~~310~~070,~~394~~897.3010 17,~~772~~474.3288 0.00 0.00 3-A-1 144,610,000.00 4.~~15797~~15509% ~~128~~126,~~988~~283,~~721~~115.7371 ~~446~~437,~~943~~264.1030 0.00 0.00 4-A-1 126,330,000.00 4.~~84805~~84528% ~~114~~112,~~420~~724,~~342~~666.0181 ~~462~~455,~~262~~152.4524 0.00 0.00 5-A-1 97,000,000.00 2.~~29250~~54000% 8075,~~338~~866,~~420~~570.1921 ~~163~~165,~~711~~937.8505 0.00 0.00 5-A-2 81,100,000.00 2.~~30250~~55000% 6359,~~028~~156,~~537~~049.3840 ~~128~~129,~~998~~896.4183 0.00 0.00 5-A-3 76,500,000.00 2.~~15250~~40000% 5348,~~771~~900,~~403~~949.3793 ~~102~~101,~~882~~061.6296 0.00 0.00 5-A-4 25,500,000.00 2.~~41250~~66000% 25,500,000.00 5458,~~683~~409.3317 0.00 0.00 5-A-5 25,000,000.00 2.~~23250~~48000% 1918,~~429~~235,~~265~~526.5394 38,~~556~~942.3098 0.00 0.00 5-M-1 9,710,000.00 2.~~53250~~78000% 9,710,000.00 2123,~~858~~244.2966 0.00 0.00 5-M-2 4,855,000.00 3.~~33250~~58000% 4,855,000.00 14,~~381~~966.5989 0.00 0.00 5-M-3 4,046,555.00 3.~~73250~~98000% 4,046,555.00 13,~~425~~868.5744 0.00 0.00 C-B-1 13,620,000.00 4.~~45380~~45210% 13,~~583~~577,~~772~~593.8249 50,~~416~~373.1896 0.00 0.00 C-B-2 6,660,000.00 4.~~45380~~45210% 6,~~642~~639,~~285~~263.3978 24,~~652~~632.8520 0.00 0.00 C-B-3 3,930,000.00 4.~~45380~~45210% 3,~~919~~917,~~546~~763.7876 14,~~547~~535.4022 0.00 0.00 C-B-4 2,421,000.00 4.~~45380~~45210% 2,~~414~~413,~~560~~462.5010 8,~~961~~954.6414 0.00 0.00 C-B-5 3,329,000.00 4.~~45380~~45210% 3,~~320~~318,~~145~~635.3500 12,~~322~~312.7240 0.00 0.00 C-B-6 1,819,674.00 4.~~45380~~45210% 1,814,~~833~~008.9436 6,~~735~~730.7612 0.00 0.00 5-X 0.00 0.00000% ~~262~~247,~~297~~889,~~739~~209.2526 0.00 0.00 0.00 Totals 929,032,329.00 2,~~573~~549,~~493~~323.8091 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 02,441.0035 0.00 ~~411~~404,~~806~~596.2911 0.00 ~~127~~126,~~545~~230,~~606~~941.0533 AR 0.00 0.00 0.00 0.00 0.00 AR-L 0.00 0.00 0.00 0.00 0.00 1-X 0138.0034 0.00 2322,~~350~~926.5616 0.00 ~~127~~126,~~545~~230,~~606~~941.0533 2-A-1 0.00 0.00 ~~515~~506,~~695~~643.7299 0.00 ~~126~~124,~~634~~890,~~409~~782.8894 2-A-2 0.00 0.00 3938,~~528~~820.8652 0.00 1413,~~070~~877,~~897~~155.1017 2-X 0.00 0.00 17,~~772~~474.3288 0.00 1413,~~070~~877,~~897~~155.1017 3-A-1 0.00 0.00 ~~446~~437,~~943~~264.1030 0.00 ~~126~~122,~~283~~857,~~115~~799.7138 4-A-1 0.00 0.00 ~~462~~455,~~262~~152.4624 0.00 ~~112~~110,~~724~~166,~~666~~571.8165 5-A-1 0.00 0.00 ~~163~~165,~~711~~937.8505 0.00 7572,~~866~~808,~~570~~070.2149 5-A-2 0.00 0.00 ~~128~~129,~~998~~896.4183 0.00 5956,~~156~~784,~~049~~793.4062 5-A-3 0.00 0.00 ~~102~~101,~~882~~061.6296 0.00 4845,~~900~~918,~~949~~606.9303 5-A-4 0.00 0.00 5458,~~683~~409.3317 0.00 25,500,000.00 5-A-5 0.00 0.00 38,~~556~~942.3098 0.00 1817,~~235~~504,~~526~~560.9430 5-M-1 0.00 0.00 2123,~~858~~244.2966 0.00 9,710,000.00 5-M-2 0.00 0.00 14,~~381~~966.5989 0.00 4,855,000.00 5-M-3 0.00 0.00 13,~~425~~868.5744 0.00 4,046,555.00 C-B-1 0302.0014 0.00 50,~~416~~071.1882 0.00 13,~~577~~571,~~593~~375.4973 C-B-2 0147.0074 0.00 24,~~652~~484.8546 0.00 6,~~639~~636,~~263~~223.7837 C-B-3 087.0018 0.00 14,~~547~~448.4004 0.00 3,~~917~~915,~~763~~969.7665 C-B-4 053.0071 0.00 8,~~961~~900.6443 0.00 2,~~413~~412,~~462~~356.1088 C-B-5 073.0085 0.00 12,~~322~~238.7255 0.00 3,~~318~~317,~~635~~115.0026 C-B-6 040.0037 0.00 6,~~735~~689.7675 0.00 1,~~814~~813,~~008~~177.3665 5-X 0.00 0.00 ~~759~~679,~~519~~883.0107 0.00 ~~247~~238,~~889~~746,~~209~~143.2621 Totals 03,284.0068 0.00 3,~~333~~225,~~012~~922.8330 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-1 148,995,000.00 3.~~82697~~82957% ~~866~~856.~~65665593~~03950502 2.~~76389335~~73188671 0.00000000 0.00000000 AR 50.00 3.~~84441~~84200% 0.00000000 0.00000000 0.00000000 0.00000000 AR-L 50.00 3.~~84441~~84200% 0.00000000 0.00000000 0.00000000 0.00000000 1-X 0.00 0.21700% ~~866~~856.~~65665593~~03950502 0.~~15672043~~15480050 0.00000000 0.00000000 2-A-1 138,245,000.00 4.~~80500~~80101% ~~931~~916.~~60564411~~01439387 3.~~73030280~~66482687 0.00000000 0.00000000 2-A-2 15,361,000.00 3.~~31470~~31071% ~~931~~916.~~60564416~~01439359 2.~~57332596~~52721307 0.00000000 0.00000000 2-X 0.00 1.49030% ~~931~~916.~~60564416~~01439359 1.~~15697676~~13761344 0.00000000 0.00000000 3-A-1 144,610,000.00 4.~~15797~~15509% ~~891~~873.~~97650045~~26682601 3.~~09067907~~02374870 0.00000000 0.00000000 4-A-1 126,330,000.00 4.~~84805~~84528% ~~905~~892.~~72581343~~30322813 3.~~65916607~~60288324 0.00000000 0.00000000 5-A-1 97,000,000.00 2.~~29250~~54000% ~~828~~782.~~23113598~~12958979 1.~~68775103~~71069124 0.00000000 0.00000000 5-A-2 81,100,000.00 2.~~30250~~55000% ~~777~~729.~~17062121~~42107768 1.~~59060925~~60168718 0.00000000 0.00000000 5-A-3 76,500,000.00 2.~~15250~~40000% ~~702~~639.~~89416170~~22810366 1.~~34487085~~32107137 0.00000000 0.00000000 5-A-4 25,500,000.00 2.~~41250~~66000% 1000.00000000 2.~~14444431~~29055569 0.00000000 0.00000000 5-A-5 25,000,000.00 2.~~23250~~48000% ~~777~~729.~~17062120~~42107760 1.~~54225200~~55771920 0.00000000 0.00000000 5-M-1 9,710,000.00 2.~~53250~~78000% 1000.00000000 2.~~25111123~~39388877 0.00000000 0.00000000 5-M-2 4,855,000.00 3.~~33250~~58000% 1000.00000000 23.~~96222245~~08277858 0.00000000 0.00000000 5-M-3 4,046,555.00 3.~~73250~~98000% 1000.00000000 3.~~31777771~~42722143 0.00000000 0.00000000 C-B-1 13,620,000.00 4.~~45380~~45210% ~~997~~996.~~34014831~~88645301 3.~~70162849~~69852863 0.00000000 0.00000000 C-B-2 6,660,000.00 4.~~45380~~45210% ~~997~~996.~~34014865~~88645345 3.~~70162913~~69852853 0.00000000 0.00000000 C-B-3 3,930,000.00 4.~~45380~~45210% ~~997~~996.~~34014758~~88645293 3.~~70162850~~69852926 0.00000000 0.00000000 C-B-4 2,421,000.00 4.~~45380~~45210% ~~997~~996.~~34014870~~88645188 3.~~70162743~~69852953 0.00000000 0.00000000 C-B-5 3,329,000.00 4.~~45380~~45210% ~~997~~996.~~34014719~~88645239 3.~~70162812~~69852809 0.00000000 0.00000000 C-B-6 1,819,674.00 4.~~45380~~45210% ~~997~~996.~~34014994~~88645329 3.~~70163007~~69853062 0.00000000 0.00000000 5-X 0.00 0.00000% 0.00000000 0.00000000 0.00000000 0.00000000 (5) All Classes 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~~01638545 0.00000000 2.~~76389335~~71550126 0.00000000 ~~856~~847.~~03950502~~21595577 AR 0.00000000 0.00000000 0.00000000 0.00000000 0.00000000 AR-L 0.00000000 0.00000000 0.00000000 0.00000000 0.00000000 1-X 0.~~00000000~~00092849 0.00000000 0.~~15672043~~15387201 0.00000000 ~~856~~847.~~03950502~~21595577 2-A-1 0.00000000 0.00000000 3.~~73030287~~66482687 0.00000000 ~~916~~903.~~01439387~~40180795 2-A-2 0.00000000 0.00000000 2.~~57332596~~52721307 0.00000000 ~~916~~903.~~01439359~~40180783 2-X 0.00000000 0.00000000 1.~~15697676~~13761344 0.00000000 ~~916~~903.~~01439359~~40180783 3-A-1 0.00000000 0.00000000 3.~~09067907~~02374870 0.00000000 ~~873~~849.~~26682601~~58024604 4-A-1 0.00000000 0.00000000 3.~~65916615~~60288324 0.00000000 ~~892~~872.~~30322813~~05391950 5-A-1 0.00000000 0.00000000 1.~~68775103~~71069124 0.00000000 ~~782~~750.~~12958979~~59866485 5-A-2 0.00000000 0.00000000 1.~~59060925~~60168718 0.00000000 ~~729~~700.~~42107768~~18241208 5-A-3 0.00000000 0.00000000 1.~~34487085~~32107137 0.00000000 ~~639~~600.~~22810366~~24321608 5-A-4 0.00000000 0.00000000 2.~~14444431~~29055569 0.00000000 1000.00000000 5-A-5 0.00000000 0.00000000 1.~~54225200~~55771920 0.00000000 ~~729~~700.~~42107760~~18241200 5-M-1 0.00000000 0.00000000 2.~~25111123~~39388877 0.00000000 1000.00000000 5-M-2 0.00000000 0.00000000 23.~~96222245~~08277858 0.00000000 1000.00000000 5-M-3 0.00000000 0.00000000 3.~~31777771~~42722143 0.00000000 1000.00000000 C-B-1 0.~~00000000~~02218355 0.00000000 3.~~70162849~~67634508 0.00000000 996.~~88645301~~42993612 C-B-2 0.~~00000000~~02218318 0.00000000 3.~~70162913~~67634535 0.00000000 996.~~88645345~~42993544 C-B-3 0.~~00000000~~02218321 0.00000000 3.~~70162850~~67634606 0.00000000 996.~~88645293~~42993639 C-B-4 0.~~00000000~~02218505 0.00000000 3.~~70162743~~67634449 0.00000000 996.~~88645188~~42993804 C-B-5 0.~~00000000~~02218384 0.00000000 3.~~70162812~~67634425 0.00000000 996.~~88645239~~42993692 C-B-6 0.~~00000000~~02218529 0.00000000 3.~~70163007~~67634532 0.00000000 996.~~88645329~~42993745 5-X 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 2621,~~344~~826,~~283~~374.7090 Liquidations, Insurance Proceeds, Reserve Funds 0.00 Proceeds from Repurchased Loans 0.00 Other Amounts (Servicer Advances) 3531,~~481~~655.4498 Realized Loss (Gains, Subsequent Expenses & Recoveries) 0.00 Prepayment Penalties 0.00 Total Deposits 2621,~~379~~858,~~765~~030.1488 Withdrawals Reimbursement for Servicer Advances 3635,~~968~~481.0244 Payment of Service Fee ~~208~~203,~~742~~608.7907 Payment of Interest and Principal 2621,~~134~~618,~~054~~941.3337 Total Withdrawals (Pool Distribution Amount) 2621,~~379~~858,~~765~~030.1488 Ending Balance 0.00

PREPAYMENT/CURTAILMENT INTEREST SHORTFALL Total Prepayment/Curtailment Interest Shortfall 0.00 Servicing Fee Support 0.00 Non-Supported Prepayment/Curtailment Interest Shortfall 03,284.0068

SERVICING FEES Gross Servicing Fee ~~202~~197,~~313~~213.6897 External Master Servicing Fee 2,~~153~~121.9886 PMI Fee 4,~~275~~272.1324 Supported Prepayment/Curtailment Interest Shortfall 0.00 Net Servicing Fee ~~208~~203,~~742~~608.7907

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 1 0 0 1 131,999.9695 0.00 0.00 131,999.9695 30 Days 1510 0 0 0 1510 32,~~735~~490,~~105~~735.2800 0.00 0.00 0.00 32,~~735~~490,~~105~~735.2800 60 Days 35 0 0 0 35 ~~807~~1,~~430~~468,032.3997 0.00 0.00 0.00 ~~807~~1,~~430~~468,032.3997 90 Days 20 0 1 0 31 ~~332,420~~0.9600 0.00 ~~120~~144,000.00 0.00 ~~452~~144,~~420~~000.9600 120 Days 21 0 1 0 32 ~~638~~194,~~367~~820.2096 0.00 ~~123~~120,~~999~~000.9900 0.00 ~~762~~314,~~367~~820.1996 150 Days 3 1 0 1 0 42 ~~836~~303,~~610~~448.8987 ~~136,000~~0.00 0123,999.0099 0.00 ~~972~~427,~~610~~448.8986 180+ Days 03 01 0 0 04 0836,610.0089 0136,000.00 0.00 0.00 0972,610.0089 Totals 2520 2 23 0 2925 65,~~349~~293,~~934~~648.7269 267,999.9695 ~~243~~387,999.99 0.00 65,~~861~~949,~~934~~648.6763 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.~~034153~~035026% 0.000000% 0.000000% 0.~~034153~~035026% 0.~~016770~~017171% 0.000000% 0.000000% 0.~~016770~~017171% 30 Days 0.~~512295~~350263% 0.000000% 0.000000% 0.000000% 0.~~512295~~350263% 0.~~474526~~324008% 0.000000% 0.000000% 0.000000% 0.~~474526~~324008% 60 Days 0.~~102459~~175131% 0.000000% 0.000000% 0.000000% 0.~~102459~~175131% 0.~~102580~~190969% 0.000000% 0.000000% 0.000000% 0.~~102580~~190969% 90 Days 0.~~068306~~000000% 0.000000% 0.~~034153~~035026% 0.000000% 0.~~102459~~035026% 0.~~042232~~000000% 0.000000% 0.~~015245~~018732% 0.000000% 0.~~057478~~018732% 120 Days 0.~~068306~~035026% 0.000000% 0.~~034153~~035026% 0.000000% 0.~~102459~~070053% 0.~~081101~~025343% 0.000000% 0.~~015754~~015610% 0.000000% 0.~~096855~~040954% 150 Days 0.~~102459~~035026% 0.~~034153~~000000% 0.~~000000~~035026% 0.000000% 0.~~136612~~070053% 0.~~106287~~039474% 0.~~017278~~000000% 0.~~000000~~016131% 0.000000% 0.~~123565~~055605% 180+ Days 0.~~000000~~105079% 0.~~000000~~035026% 0.000000% 0.000000% 0.~~000000~~140105% 0.~~000000~~108831% 0.~~000000~~017692% 0.000000% 0.000000% 0.~~000000~~126522% Totals 0.~~853825~~700525% 0.~~068306~~070053% 0.~~068306~~105079% 0.000000% 0.~~990437~~875657% 0.~~806727~~688625% 0.~~034048~~034863% 0.~~030999~~050473% 0.000000% 0.~~871774~~773961%

Delinquency Status By Groups DELINQUENT BANKRUPTCY FORECLOSURE REO Total GI 30Y Jumbo A Arm 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 02 0 0 0 02 0914,272.0024 0.00 0.00 0.00 0914,272.0024 60 Days 10 0 0 0 10 ~~558,951~~0.8700 0.00 0.00 0.00 ~~558,951~~0.8700 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 12 0 0 0 12 ~~558~~914,~~951~~272.8724 0.00 0.00 0.00 ~~558~~914,~~951~~272.8724 0-29 Days 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 30 Days 0.~~000000~~735294% 0.000000% 0.000000% 0.000000% 0.~~000000~~735294% 0.~~000000~~679705% 0.000000% 0.000000% 0.000000% 0.~~000000~~679705% 60 Days 0.~~363636~~000000% 0.000000% 0.000000% 0.000000% 0.~~363636~~000000% 0.~~411516~~000000% 0.000000% 0.000000% 0.000000% 0.~~411516~~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.~~363636~~735294% 0.000000% 0.000000% 0.000000% 0.~~363636~~735294% 0.~~411516~~679705% 0.000000% 0.000000% 0.000000% 0.~~411516~~679705% DELINQUENT BANKRUPTCY FORECLOSURE REO Total G2 30Y Jumbo A Arm 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 01 0 0 0 01 0501,321.0017 0.00 0.00 0.00 0501,321.0017 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 01 0 0 0 01 0501,321.0017 0.00 0.00 0.00 0501,321.0017 0-29 Days 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 30 Days 0.~~000000~~335570% 0.000000% 0.000000% 0.000000% 0.~~000000~~335570% 0.~~000000~~340365% 0.000000% 0.000000% 0.000000% 0.~~000000~~340365% 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~~335570% 0.000000% 0.000000% 0.000000% 0.~~000000~~335570% 0.~~000000~~340365% 0.000000% 0.000000% 0.000000% 0.~~000000~~340365% DELINQUENT BANKRUPTCY FORECLOSURE REO Total G3 30Y Jumbo A Arm 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 31 0 0 0 31 ~~640~~136,~~549~~200.9700 0.00 0.00 0.00 ~~640~~136,~~549~~200.9700 60 Days 01 0 0 0 01 0288,000.00 0.00 0.00 0.00 0288,000.00 90 Days 10 0 0 0 10 ~~137,600~~0.00 0.00 0.00 0.00 ~~137,600~~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 42 0 0 0 42 ~~778~~424,~~149~~200.9700 0.00 0.00 0.00 ~~778~~424,~~149~~200.9700 0-29 Days 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 30 Days 0.~~437318~~149254% 0.000000% 0.000000% 0.000000% 0.~~437318~~149254% 0.~~476935~~104068% 0.000000% 0.000000% 0.000000% 0.~~476935~~104068% 60 Days 0.~~000000~~149254% 0.000000% 0.000000% 0.000000% 0.~~000000~~149254% 0.~~000000~~220055% 0.000000% 0.000000% 0.000000% 0.~~000000~~220055% 90 Days 0.~~145773~~000000% 0.000000% 0.000000% 0.000000% 0.~~145773~~000000% 0.~~102453~~000000% 0.000000% 0.000000% 0.000000% 0.~~102453~~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.~~583090~~298507% 0.000000% 0.000000% 0.000000% 0.~~583090~~298507% 0.~~579388~~324123% 0.000000% 0.000000% 0.000000% 0.~~579388~~324123% DELINQUENT BANKRUPTCY FORECLOSURE REO Total G4 30Y Jumbo A Arm 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 1 0 0 1 131,999.9695 0.00 0.00 131,999.9695 30 Days 1 0 0 0 1 ~~230~~111,~~710~~899.5195 0.00 0.00 0.00 ~~230~~111,~~710~~899.5195 60 Days 0 0 0 0 0 0.00 0.00 0.00 0.00 0.00 90 Days 0 0 10 0 10 0.00 0.00 ~~120,000~~0.00 0.00 ~~120,000~~0.00 120 Days 0 0 01 0 01 0.00 0.00 0120,000.00 0.00 0120,000.00 150 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 1 1 0 3 ~~230~~111,~~710~~899.5195 131,999.9695 120,000.00 0.00 ~~482~~363,~~710~~899.4790 0-29 Days 0.~~166667~~170940% 0.000000% 0.000000% 0.~~166667~~170940% 0.~~110245~~112655% 0.000000% 0.000000% 0.~~110245~~112655% 30 Days 0.~~166667~~170940% 0.000000% 0.000000% 0.000000% 0.~~166667~~170940% 0.~~192688~~095501% 0.000000% 0.000000% 0.000000% 0.~~192688~~095501% 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.~~166667~~000000% 0.000000% 0.~~166667~~000000% 0.000000% 0.000000% 0.~~100223~~000000% 0.000000% 0.~~100223~~000000% 120 Days 0.000000% 0.000000% 0.~~000000~~170940% 0.000000% 0.~~000000~~170940% 0.000000% 0.000000% 0.~~000000~~102414% 0.000000% 0.~~000000~~102414% 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.~~166667~~170940% 0.~~166667~~170940% 0.~~166667~~170940% 0.000000% 0.~~500000~~512821% 0.~~192688~~095501% 0.~~110245~~112655% 0.~~100223~~102414% 0.000000% 0.~~403156~~310570% DELINQUENT BANKRUPTCY FORECLOSURE REO Total G5-A 30Y AltA Arm 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 1416,~~383,617~~450.4055 0.00 0.00 0.00 1416,~~383,617~~450.4055 60 Days 23 0 0 0 23 ~~248~~559,~~478~~139.5236 0.00 0.00 0.00 ~~248~~559,~~478~~139.5236 90 Days 0 0 01 0 01 0.00 0.00 0144,000.00 0.00 0144,000.00 120 Days 0 0 0 0 0 0.00 0.00 0.00 0.00 0.00 150 Days 20 10 0 0 30 ~~357,100~~0.2700 ~~136,000~~0.00 0.00 0.00 ~~493,100~~0.2700 180 Days 02 01 0 0 03 0357,100.0027 0136,000.00 0.00 0.00 0493,100.0027 Totals 117 1 01 0 129 1,~~989~~332,~~196~~690.1918 136,000.00 0144,000.00 0.00 21,~~125~~612,~~196~~690.1918 0-29 Days 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 30 Days 10.~~521739~~450450% 0.000000% 0.000000% 0.000000% 10.~~521739~~450450% 10.~~682001~~525830% 0.000000% 0.000000% 0.000000% 10.~~682001~~525830% 60 Days 0.~~434783~~675676% 0.000000% 0.000000% 0.000000% 0.~~434783~~675676% 0.~~302064~~705996% 0.000000% 0.000000% 0.000000% 0.~~302064~~705996% 90 Days 0.000000% 0.000000% 0.~~000000~~225225% 0.000000% 0.~~000000~~225225% 0.000000% 0.000000% 0.~~000000~~181821% 0.000000% 0.~~000000~~181821% 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.~~434783~~000000% 0.~~217391~~000000% 0.000000% 0.000000% 0.~~652174~~000000% 0.~~434111~~000000% 0.~~165329~~000000% 0.000000% 0.000000% 0.~~599440~~000000% 180 Days 0.~~000000~~450450% 0.~~000000~~225225% 0.000000% 0.000000% 0.~~000000~~675676% 0.~~000000~~450892% 0.~~000000~~171720% 0.000000% 0.000000% 0.~~000000~~622612% Totals 21.~~391304~~576577% 0.~~217391~~225225% 0.~~000000~~225225% 0.000000% 2.~~608696~~027027% 21.~~418176~~682719% 0.~~165329~~171720% 0.~~000000~~181821% 0.000000% 2.~~583505~~036260% DELINQUENT BANKRUPTCY FORECLOSURE REO Total G5-B 30Y AltA Arm 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 43 0 0 0 43 1410,~~480,227~~591.4009 0.00 0.00 0.00 410,591.09 60 Days 1 0 0 0 1 620,~~480~~893.61 0.00 0.00 0.00 620,~~227~~893.4061 6090 Days 0 0 0 0 0 0.00 0.00 0.00 0.00 0.00 90120 Days 1 0 0 0 1 194,820.96 0.00 0.00 0.00 194,820.96 ~~120~~150 Days 21 0 1 0 32 ~~638~~303,~~367~~448.2087 0.00 123,999.99 0.00 ~~762~~427,~~367~~448.1986 ~~150~~180 Days 1 0 0 0 1 479,510.62 0.00 0.00 0.00 479,510.62 ~~180 Days 0 0 0 0 0 0.00 0.00 0.00 0.00 0.00~~ Totals 87 0 1 0 98 2,~~792~~009,~~926~~265.1815 0.00 123,999.99 0.00 2,~~916~~133,~~926~~265.1714 0-29 Days 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 30 Days 0.~~661157~~511945% 0.000000% 0.000000% 0.000000% 0.~~661157~~511945% 0.~~892954~~257131% 0.000000% 0.000000% 0.000000% 0.~~892954~~257131% 60 Days 0.~~000000~~170648% 0.000000% 0.000000% 0.000000% 0.~~000000~~170648% 0.~~000000~~388833% 0.000000% 0.000000% 0.000000% 0.~~000000~~388833% 90 Days 0.~~165289~~000000% 0.000000% 0.000000% 0.000000% 0.~~165289~~000000% 0.~~117527~~000000% 0.000000% 0.000000% 0.000000% 0.~~117527~~000000% 120 Days 0.~~330579~~170648% 0.000000% 0.~~165289~~000000% 0.000000% 0.~~495868~~170648% 0.~~385098~~122006% 0.000000% 0.~~074804~~000000% 0.000000% 0.~~459901~~122006% 150 Days 0.~~165289~~170648% 0.000000% 0.~~000000~~170648% 0.000000% 0.~~165289~~341297% 0.~~289267~~190034% 0.000000% 0.~~000000~~077655% 0.000000% 0.~~289267~~267688% 180 Days 0.~~000000~~170648% 0.000000% 0.000000% 0.000000% 0.~~000000~~170648% 0.~~000000~~300292% 0.000000% 0.000000% 0.000000% 0.~~000000~~300292% Totals 1.~~322314~~194539% 0.000000% 0.~~165289~~170648% 0.000000% 1.~~487603~~365188% 1.~~684845~~258296% 0.000000% 0.~~074804~~077655% 0.000000% 1.~~759648~~335950%

OTHER INFORMATION Current Period Class A Insufficient Funds 0.00 Principal Balance of Contaminated Properties 0.00 Periodic Advance 3531,~~481~~655.4498

CREDIT ENHANCEMENT Original $ Original % Current $ Current % Bankruptcy 220,916.00 0.02377915% 220,916.00 0.~~02807676~~02874880% Fraud 12,106,416.00 1.30312107% 12,106,416.00 1.~~53863440~~57546264% Special Hazard 6,053,208.00 0.65156053% 5,591,700.04 0.~~71066301~~72767320% Limit of Subordinate's Exposure to Certain Types of Losses

COLLATERAL STATEMENT Collateral Description Mixed ARM Weighted Average Gross Coupon 5.~~249445~~235419% Weighted Average Net Coupon 4.~~949584~~934646% Weighted Average Pass-Through Rate 4.~~940055~~924895% Weighted Average Maturity(Stepdown Calculation ) ~~351~~350 Beginning Scheduled Collateral Loan Count 32,~~005~~928 Number Of Loans Paid In Full 7773 Ending Scheduled Collateral Loan Count 2,~~928~~855 Beginning Scheduled Collateral Balance ~~809~~786,~~629~~828,~~673~~631.0656 Ending Scheduled Collateral Balance ~~786~~768,~~828~~435,~~631~~612.5648 Ending Actual Collateral Balance at 3130-~~Oct~~Nov-2004 ~~787~~768,~~122~~727,~~855~~159.1490 Monthly P &I Constant 3,~~941~~821,~~027~~096.0512 Special Servicing Fee 0.00 Prepayment Penalties 0.00 Realized Loss Amount 0.00 Cumulative Realized Loss 0.00 Scheduled Principal ~~399~~388,~~271~~281.5620 Unscheduled Principal 2218,~~401~~004,~~769~~737.~~94 Extra principal distribution Amount 0.00 Excess Cash Amount 0.00~~88

Group Level Collateral Statement Group GI 30Y Jumbo A Arm G2 30Y Jumbo A Arm G3 30Y Jumbo A Arm Collateral Description Mixed ARM and Balloon Mixed ARM and Balloon Mixed ARM Weighted Average Coupon Rate 4.~~338682~~341766 5.~~137430~~133436 4.~~519109~~517215 Weighted Average Net Rate 4.~~051969~~054652 4.~~812627~~808547 4.~~185562~~182781 Weighted Average Maturity ~~351~~350 ~~351~~350 ~~351~~350 Beginning Loan Count ~~278~~275 ~~306~~302 ~~697~~686 Loans Paid In Full 3 4 1116 Ending Loan Count ~~275~~272 ~~302~~298 ~~686~~670 Beginning Scheduled Balance ~~137~~135,~~350~~762,~~090~~382.4869 ~~151~~149,~~589~~190,~~226~~633.3432 ~~136~~134,~~985~~277,~~950~~776.5066 Ending scheduled Balance ~~135~~134,~~762~~441,~~382~~878.6919 ~~149~~147,~~190~~249,~~633~~549.3294 ~~134~~130,~~277~~849,~~776~~881.6609 Record Date 1011/3130/2004 1011/3130/2004 1011/3130/2004 Principal And Interest Constant ~~593~~587,~~571~~695.8544 ~~714~~703,~~757~~526.9935 ~~559~~548,~~863~~788.2881 Scheduled Principal 96,~~973~~488.1938 65,~~775~~309.4919 43,~~984~~320.5877 Unscheduled Principal 1,~~490~~224,~~734~~016.6012 21,~~332~~875,~~817~~774.5319 23,~~664~~384,~~189~~574.2680 Scheduled Interest ~~496~~491,~~598~~207.6606 ~~648~~638,~~982~~217.5016 ~~515~~505,~~878~~468.7004 Servicing Fees 32,~~816~~482.6874 4140,~~030~~391.4797 3837,~~076~~422.0956 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 ~~915~~914.2223 ~~963~~937.7537 ~~866~~861.1715 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 ~~462~~457,~~866~~810.7609 ~~606~~596,~~988~~887.2882 ~~476~~467,~~936~~184.4433 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 4.~~043973~~046571 4.~~804998~~801008 4.~~177974~~175086

Group Level Collateral Statement Group G4 30Y Jumbo A Arm G5-A 30Y AltA Arm G5-B 30Y AltA Arm Collateral Description Mixed ARM and Balloon Mixed ARM and Balloon Mixed ARM and Balloon Weighted Average Coupon Rate 5.~~226282~~223865 6.~~212785~~206519 6.~~168653~~168109 Weighted Average Net Rate 4.~~875682~~873022 5.~~962786~~956521 5.~~916779~~916123 Weighted Average Maturity ~~351~~350 ~~351~~350 ~~351~~350 Beginning Loan Count ~~608~~600 ~~484~~460 ~~632~~605 Loans Paid In Full 815 2416 2719 Ending Loan Count ~~600~~585 ~~460~~444 ~~605~~586 Beginning Scheduled Balance ~~121~~119,~~406~~708,~~666~~629.4963 8682,~~686~~214,~~050~~200.2527 ~~175~~165,~~611~~675,~~689~~008.0099 Ending scheduled Balance ~~119~~117,~~708~~148,~~629~~160.6305 8279,~~214~~155,~~200~~700.2755 ~~165~~159,~~675~~590,~~008~~442.9966 Record Date 1011/3130/2004 1011/3130/2004 1011/3130/2004 Principal And Interest Constant ~~569~~561,~~794~~816.8081 ~~497~~470,~~402~~888.7633 1948,~~005,636~~380.3738 Scheduled Principal 4140,~~040~~698.2875 4845,~~601~~668.2532 ~~102~~96,~~896~~795.7779 Unscheduled Principal 12,~~656~~519,~~996~~770.5883 43,~~423~~012,~~248~~831.7340 95,~~833~~987,~~783~~770.2454 Scheduled Interest ~~528~~521,~~754~~118.5206 ~~448~~425,~~801~~220.5101 ~~902~~851,~~739~~584.6059 Servicing Fees 3534,~~470~~999.9008 1817,~~059~~127.5584 3634,~~859~~789.9978 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 772.7022 ~~697~~696.6297 2,~~213~~212.6516 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 ~~492~~485,~~510~~346.9276 ~~430~~407,~~044~~395.3420 ~~863~~814,~~665~~582.9665 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 4.~~868045~~865281 5.~~953128~~946346 5.~~901652~~900101

Group Level Collateral Statement Group Total Collateral Description Mixed ARM Weighted Average Coupon Rate 5.~~249445~~235419 Weighted Average Net Rate 4.~~949584~~934646 Weighted Average Maturity ~~351~~350.00 Record Date 1011/3130/2004 Principal And Interest Constant 3,~~941~~821,~~027~~096.0512 Beginning Loan Count 32,~~005~~928 Loans Paid In Full 7773 Ending Loan Count 2,~~928~~855 Beginning Scheduled Balance ~~809~~786,~~629~~828,~~673~~631.0656 Ending Scheduled Balance ~~786~~768,~~828~~435,~~631~~612.5648 Scheduled Principal ~~399~~388,~~271~~281.5620 Unscheduled Principal 2218,~~401~~004,~~769~~737.9488 Scheduled Interest 3,~~541~~432,~~755~~814.4992 Servicing Fee ~~202~~197,~~313~~213.6897 Master Servicing Fee 0.00 Trustee Fee 0.00 Fry Amount 0.00 Special Hazard Fee 0.00 Other Fee 6,~~429~~394.1110 Pool Insurance Fee 0.00 Spread 1 0.00 Spread 2 0.00 Spread 3 0.00 Net Interest 3,~~333~~229,~~012~~206.7085 Realized Loss Amount 0.00 Cumulative Realized Loss 0.00 Percentage of Cumulative Losses 0.0000 Prepayment Penalties 0.00 Special Servicing Fee 0.00 Pass-Through Rate 4.~~940055~~924895

Miscellaneous Reporting Group G4 30Y Jumbo A Arm Insurance Proceeds 0.00 Net Liquidation Proceeds 0.00 Repurchase Principal 0.00 Substitution Amount 0.00 Substitution Adjustment Amount 0.00 Subsequent Losses 0.00 Subsequent Loss Recoveries 0.00 Group G5-A 30Y AltA Arm Insurance Proceeds 0.00 Net Liquidation Proceeds 0.00 Repurchase Principal 0.00 Substitution Amount 0.00 Substitution Adjustment Amount 0.00 Subsequent Losses 0.00 Subsequent Loss Recoveries 0.00 Group G5-B 30Y AltA Arm Excess Cash ~~759~~679,~~519~~883.0107 Grp 1 Excess Interest 2,~~283~~237.1096 Grp 2 Excess Interest 21,~~023~~995.4414 Extra Principal Distribution 0.00 Overcollateralized Amount 1,618,557.78 Overcollateralization Deficiency 0.00 Overcollateralization Increase 0.00 Overcollateralization Release 0.00 Target Overcollateralization 1,618,557.78 Rolling 3 month Delinquency Rate 1.~~239236~~264149% Trigger Event - 3 mo Delinq Rate > 5.25% NO Insurance Proceeds 0.00 Net Liquidation Proceeds 0.00 Repurchase Principal 0.00 Substitution Amount 0.00 Substitution Adjustment Amount 0.00 Subsequent Losses 0.00 Subsequent Loss Recoveries 0.00

Group

Filing Compare · CSFB MORTGAGE-BACKED PASS-THROUGH CERTIFICATES, SERIES 2004-AR4