8-K 1 bsa04ac4_dec.txt DECEMBER 8K UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington D. C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): December 27, 2004 BEAR STEARNS ASSET BACKED SECURITIES I TRUST Asset Backed Certificates, Series 2004-AC4 Trust (Exact name of registrant as specified in its charter) New York (governing law of 333-113636-08 54-2157795 Pooling and Servicing Agreement) (Commission 54-2157796 (State or other File Number) 54-6636452 jurisdiction IRS EIN of Incorporation) C/O Wells Fargo Bank, N.A. 9062 Old Annapolis Road Columbia, MD 21045 (Address of principal executive offices) (Zip Code) Registrant's telephone number, including area code: (410) 884-2000 (Former name or former address, if changed since last report) Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below): [ ] Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) [ ] Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) [ ] Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act(17 CFR 240.14d-2(b)) [ ] Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act(17 CFR 240.13e-4(c)) ITEM 8.01 Other Events On December 27, 2004 a distribution was made to holders of BEAR STEARNS ASSET BACKED SECURITIES I TRUST, Asset Backed Certificates, Series 2004-AC4 Trust. ITEM 9.01 Financial Statements and Exhibits (c) Exhibits Exhibit Number Description EX-99.1 Monthly report distributed to holders of Asset Backed Certificates, Series 2004-AC4 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. BEAR STEARNS ASSET BACKED SECURITIES I TRUST Asset Backed Certificates, Series 2004-AC4 Trust (Registrant) By: Wells Fargo Bank, N.A. as Securities Administrator By: /s/ Beth Belfield as Assistant Vice President By: Beth Belfield as Assistant Vice President Date: 12/30/2004 INDEX TO EXHIBITS Exhibit Number Description EX-99.1 Monthly report distributed to holders of Asset Backed Certificates, Series 2004-AC4 Trust, relating to the December 27, 2004 distribution. EX-99.1

Bear Stearns Asset Backed Securities ~~Mortgage~~Asset ~~Pass-Through~~Backed Certificates Record Date: 1011/3130/2004 Distribution Date: 1112/2627/2004 ~~BSA~~Bear Stearns Asset Backed Securities Asset Backed Certificates Series: 2004-AC4 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 A-1 073879EA2 SEN 5.33000% 7271,~~409~~742,~~661~~767.9217 ~~321~~318,~~619~~657.5846 ~~666~~1,~~894~~382,860.7568 A-2 073879EB0 SEN 5.50000% ~~179~~177,~~464~~812,~~933~~057.4100 ~~822~~814,~~547~~971.6193 13,~~652~~427,~~876~~374.4010 A-3 073879EC8 SEN 5.25000% 7271,~~064~~308,~~283~~469.5146 ~~315~~311,~~281~~974.2455 ~~755~~1,~~814~~567,242.0510 A-4 073879ED6 SEN 5.25000% 10,000,000.00 43,750.00 0.00 A-5 073879EE4 SEN 2.~~43250~~68000% 13,~~130~~009,~~285~~355.3611 2629,~~616~~054.1823 ~~120~~250,~~930~~758.2574 A-6 073879EF1 SEN 5.~~56750~~32000% 0.00 6057,~~919~~674.0581 0.00 M-1 073879EG9 SUB 2.~~53250~~78000% 36,~~754~~415,~~178~~672.9304 8084,~~152~~362.1997 ~~338~~701,~~506~~921.8864 M-2 073879EH7 SUB 3.~~08250~~33000% 27,~~289~~038,~~753~~414.3809 7275,~~437~~031.2460 ~~251~~521,~~339~~172.2953 B 073879EJ3 SUB 34.~~83250~~08000% 25,~~309~~076,~~590~~488.5055 8385,~~526~~260.9206 ~~233~~483,~~101~~355.9490 C 073879EK0 OC 0.00000% 3,875,243.00 ~~440~~425,~~215~~439.6826 0.00 P 073879EL8 SEN 0.00000% 100.00 ~~30,509~~488.9554 0.00 R-1 073879EM6 RES 0.00000% 0.00 0.00 0.00 R-2 073879EN4 RES 0.00000% 0.00 0.00 0.00 R-3 073879EP9 RES 0.00000% 0.00 0.00 0.00 Totals ~~440~~436,~~298~~278,~~030~~566.0142 2,~~297~~246,~~575~~665.6441 48,~~019~~334,~~463~~685.5669

Certificateholder Distribution Summary (continued) Current Ending Cumulative Realized Certificate Total Realized Class Loss Balance Distribution Losses A-1 0.00 7170,~~742~~359,~~767~~906.1749 ~~988~~1,~~514~~701,518.3314 0.00 A-2 0.00 ~~177~~174,~~812~~384,~~057~~682.0090 24,~~475~~242,~~424~~346.0103 0.00 A-3 0.00 7169,~~308~~741,~~469~~227.4635 1,~~071~~879,~~095~~216.2965 0.00 A-4 0.00 10,000,000.00 43,750.00 0.00 A-5 0.00 1312,~~009~~758,~~355~~596.1138 ~~147~~279,~~546~~812.4397 0.00 A-6 0.00 0.00 6057,~~919~~674.0581 0.00 M-1 0.00 3635,~~415~~713,~~672~~750.0440 ~~418~~786,~~659~~284.0761 0.00 M-2 0.00 2726,~~038~~517,~~414~~241.0956 ~~323~~596,~~776~~204.5313 0.00 B 0.00 2524,~~076~~593,~~488~~132.5565 ~~316~~568,~~628~~615.8696 0.00 C 0.00 3,875,243.00 ~~440~~425,~~215~~439.6826 0.00 P 0.00 100.00 ~~30,509~~488.9554 0.00 R-1 0.00 0.00 0.00 0.00 R-2 0.00 0.00 0.00 0.00 R-3 0.00 0.00 0.00 0.00 Totals 0.00 ~~436~~427,~~278~~943,~~566~~880.4273 610,~~317~~581,~~039~~351.2010 0.00 All distributions required by the Pooling and Servicing Agreement have been calculated by the Certificate Administrator on behalf of the Trustee.

Principal Distribution Statement Original Beginning Scheduled Unscheduled Face Certificate Principal Principal Realized Class Amount Balance Distribution Distribution Accretion Loss (1) A-1 75,000,000.00 7271,~~409~~742,~~661~~767.9217 0.00 ~~666~~1,~~894~~382,860.7568 0.00 0.00 A-2 185,885,000.00 ~~179~~177,~~464~~812,~~933~~057.4100 0.00 13,~~652~~427,~~876~~374.4010 0.00 0.00 A-3 75,000,000.00 7271,~~064~~308,~~283~~469.5146 0.00 ~~755~~1,~~814~~567,242.0510 0.00 0.00 A-4 10,000,000.00 10,000,000.00 0.00 0.00 0.00 0.00 A-5 13,600,000.00 13,~~130~~009,~~285~~355.3611 0.00 ~~120~~250,~~930~~758.2574 0.00 0.00 A-6 0.00 0.00 0.00 0.00 0.00 0.00 M-1 38,069,000.00 36,~~754~~415,~~178~~672.9304 0.00 ~~338~~701,~~506~~921.8864 0.00 0.00 M-2 28,266,000.00 27,~~289~~038,~~753~~414.3809 0.00 ~~251~~521,~~339~~172.2953 0.00 0.00 B 26,215,000.00 25,~~309~~076,~~590~~488.5055 0.00 ~~233~~483,~~101~~355.9490 0.00 0.00 C 3,875,954.58 3,875,243.00 0.00 0.00 0.00 0.00 P 100.00 100.00 0.00 0.00 0.00 0.00 R-1 0.00 0.00 0.00 0.00 0.00 0.00 R-2 0.00 0.00 0.00 0.00 0.00 0.00 R-3 0.00 0.00 0.00 0.00 0.00 0.00 Totals 455,911,054.58 ~~440~~436,~~298~~278,~~030~~566.0142 0.00 48,~~019~~334,~~463~~685.5669 0.00 0.00 (1) Amount Does Not Include Excess Special Hazard, Bankruptcy, or Fraud Losses Unless Otherwise Disclosed. Please Refer to the Prospectus Supplement for a Full Description.

Principal Distribution Statement (continued) Total Ending Ending Total Principal Certificate Certificate Principal Class Reduction Balance Percentage Distribution A-1 ~~666~~1,~~894~~382,860.7568 7170,~~742~~359,~~767~~906.1749 0.~~95657023~~93813209 ~~666~~1,~~894~~382,860.7568 A-2 13,~~652~~427,~~876~~374.4010 ~~177~~174,~~812~~384,~~057~~682.0090 0.~~95657023~~93813209 13,~~652~~427,~~876~~374.4010 A-3 ~~755~~1,~~814~~567,242.0510 7169,~~308~~741,~~469~~227.4635 0.~~95077959~~92988303 ~~755~~1,~~814~~567,242.0510 A-4 0.00 10,000,000.00 1.00000000 0.00 A-5 ~~120~~250,~~930~~758.2574 1312,~~009~~758,~~355~~596.1138 0.~~95657023~~93813209 ~~120~~250,~~930~~758.2574 A-6 0.00 0.00 0.00000000 0.00 M-1 ~~338~~701,~~506~~921.8864 3635,~~415~~713,~~672~~750.0440 0.~~95657023~~93813209 ~~338~~701,~~506~~921.8864 M-2 ~~251~~521,~~339~~172.2953 2726,~~038~~517,~~414~~241.0956 0.~~95657023~~93813209 ~~251~~521,~~339~~172.2953 B ~~233~~483,~~101~~355.9490 2524,~~076~~593,~~488~~132.5565 0.~~95657023~~93813209 ~~233~~483,~~101~~355.9490 C 0.00 3,875,243.00 0.99981641 0.00 P 0.00 100.00 1.00000000 0.00 R-1 0.00 0.00 0.00000000 0.00 R-2 0.00 0.00 0.00000000 0.00 R-3 0.00 0.00 0.00000000 0.00 Totals 48,~~019~~334,~~463~~685.5669 ~~436~~427,~~278~~943,~~566~~880.4273 0.~~95693790~~93865651 48,~~019~~334,~~463~~685.5669

Principal Distribution Factors Statement Original Beginning Scheduled Unscheduled Face Certificate Principal Principal Class (2) Amount Balance Distribution Distribution Accretion A-1 75,000,000.00 ~~965~~956.~~46215893~~57022893 0.00000000 818.~~89193000~~43814240 0.00000000 A-2 185,885,000.00 ~~965~~956.~~46215892~~57022890 0.00000000 818.~~89192996~~43814240 0.00000000 A-3 75,000,000.00 ~~960~~950.~~85711347~~77959280 0.00000000 1020.~~07752067~~89656133 0.00000000 A-4 10,000,000.00 1000.00000000 0.00000000 0.00000000 0.00000000 A-5 13,600,000.00 ~~965~~956.~~46215882~~57022868 0.00000000 818.~~89193015~~43814265 0.00000000 A-6 0.00 0.00000000 0.00000000 0.00000000 0.00000000 M-1 38,069,000.00 ~~965~~956.~~46215897~~57022880 0.00000000 818.~~89192992~~43814232 0.00000000 M-2 28,266,000.00 ~~965~~956.~~46215878~~57022890 0.00000000 818.~~89192988~~43814229 0.00000000 B 26,215,000.00 ~~965~~956.~~46215907~~57022888 0.00000000 818.~~89192981~~43814228 0.00000000 C 3,875,954.58 999.81641168 0.00000000 0.00000000 0.00000000 P 100.00 1000.00000000 0.00000000 0.00000000 0.00000000 R-1 0.00 0.00000000 0.00000000 0.00000000 0.00000000 R-2 0.00 0.00000000 0.00000000 0.00000000 0.00000000 R-3 0.00 0.00000000 0.00000000 0.00000000 0.00000000

Principal Distribution Factors Statement (continued) Total Ending Ending Total Realized Principal Certificate Certificate Principal Class Loss (3) Reduction Balance Percentage Distribution A-1 0.00000000 818.~~89193000~~43814240 ~~956~~938.~~57022893~~13208653 0.~~95657023~~93813209 818.~~89193000~~43814240 A-2 0.00000000 818.~~89192996~~43814240 ~~956~~938.~~57022890~~13208651 0.~~95657023~~93813209 818.~~89192996~~43814240 A-3 0.00000000 1020.~~07752067~~89656133 ~~950~~929.~~77959280~~88303133 0.~~95077959~~92988303 1020.~~07752067~~89656133 A-4 0.00000000 0.00000000 1,000.00000000 1.00000000 0.00000000 A-5 0.00000000 818.~~89193015~~43814265 ~~956~~938.~~57022868~~13208676 0.~~95657023~~93813209 818.~~89193015~~43814265 A-6 0.00000000 0.00000000 0.00000000 0.00000000 0.00000000 M-1 0.00000000 818.~~89192992~~43814232 ~~956~~938.~~57022880~~13208647 0.~~95657023~~93813209 818.~~89192992~~43814232 M-2 0.00000000 818.~~89192988~~43814229 ~~956~~938.~~57022890~~13208661 0.~~95657023~~93813209 818.~~89192988~~43814229 B 0.00000000 818.~~89192981~~43814228 ~~956~~938.~~57022888~~13208659 0.~~95657023~~93813209 818.~~89192981~~43814228 C 0.00000000 0.00000000 999.81641168 0.99981641 0.00000000 P 0.00000000 0.00000000 1,000.00000000 1.00000000 0.00000000 R-1 0.00000000 0.00000000 0.00000000 0.00000000 0.00000000 R-2 0.00000000 0.00000000 0.00000000 0.00000000 0.00000000 R-3 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 A-1 75,000,000.00 5.33000% 7271,~~409~~742,~~661~~767.9217 ~~321~~318,~~619~~657.5846 0.00 0.00 A-2 185,885,000.00 5.50000% ~~179~~177,~~464~~812,~~933~~057.4100 ~~822~~814,~~547~~971.6193 0.00 0.00 A-3 75,000,000.00 5.25000% 7271,~~064~~308,~~283~~469.5146 ~~315~~311,~~281~~974.2455 0.00 0.00 A-4 10,000,000.00 5.25000% 10,000,000.00 43,750.00 0.00 0.00 A-5 13,600,000.00 2.~~43250~~68000% 13,~~130~~009,~~285~~355.3611 2629,~~616~~054.1823 0.00 0.00 A-6 0.00 5.~~56750~~32000% 13,~~130~~009,~~285~~355.3611 6057,~~919~~674.0581 0.00 0.00 M-1 38,069,000.00 2.~~53250~~78000% 36,~~754~~415,~~178~~672.9304 8084,~~152~~362.1997 0.00 0.00 M-2 28,266,000.00 3.~~08250~~33000% 27,~~289~~038,~~753~~414.3809 7275,~~437~~031.2460 0.00 0.00 B 26,215,000.00 34.~~83250~~08000% 25,~~309~~076,~~590~~488.5055 8385,~~526~~260.9206 0.00 0.00 C 3,875,954.58 0.00000% 3,875,243.00 0.00 0.00 0.00 P 100.00 0.00000% 100.00 0.00 0.00 0.00 R-1 0.00 0.00000% 0.00 0.00 0.00 0.00 R-2 0.00 0.00000% 0.00 0.00 0.00 0.00 R-3 0.00 0.00000% 0.00 0.00 0.00 0.00 Totals 455,911,054.58 1,~~826~~820,~~850~~737.0161 0.00 0.00

Interest Distribution Statement (continued) Remaining Ending Non-Supported Total Unpaid Certificate/ Interest Realized Interest Interest Notional Class Shortfall Losses (4) Distribution Shortfall Balance A-1 0.00 0.00 ~~321~~318,~~619~~657.5846 0.00 7170,~~742~~359,~~767~~906.1749 A-2 0.00 0.00 ~~822~~814,~~547~~971.6193 0.00 ~~177~~174,~~812~~384,~~057~~682.0090 A-3 0.00 0.00 ~~315~~311,~~281~~974.2455 0.00 7169,~~308~~741,~~469~~227.4635 A-4 0.00 0.00 43,750.00 0.00 10,000,000.00 A-5 0.00 0.00 2629,~~616~~054.1823 0.00 1312,~~009~~758,~~355~~596.1138 A-6 0.00 0.00 6057,~~919~~674.0581 0.00 1312,~~009~~758,~~355~~596.1138 M-1 0.00 0.00 8084,~~152~~362.1997 0.00 3635,~~415~~713,~~672~~750.0440 M-2 0.00 0.00 7275,~~437~~031.2460 0.00 2726,~~038~~517,~~414~~241.0956 B 0.00 0.00 8385,~~526~~260.9206 0.00 2524,~~076~~593,~~488~~132.5565 C 0.00 0.00 ~~440~~425,~~215~~439.6826 0.00 3,875,243.00 P 0.00 0.00 ~~30,509~~488.9554 0.00 100.00 R-1 0.00 0.00 0.00 0.00 0.00 R-2 0.00 0.00 0.00 0.00 0.00 R-3 0.00 0.00 0.00 0.00 0.00 Totals 0.00 0.00 2,~~297~~246,~~575~~665.6441 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 A-1 75,000,000.00 5.33000% ~~965~~956.~~46215893~~57022893 4.~~28826107~~24876613 0.00000000 0.00000000 A-2 185,885,000.00 5.50000% ~~965~~956.~~46215892~~57022890 4.~~42503489~~38428023 0.00000000 0.00000000 A-3 75,000,000.00 5.25000% ~~960~~950.~~85711347~~77959280 4.~~20374987~~15966067 0.00000000 0.00000000 A-4 10,000,000.00 5.25000% 1000.00000000 4.37500000 0.00000000 0.00000000 A-5 13,600,000.00 2.~~43250~~68000% ~~965~~956.~~46215882~~57022868 12.~~95707206~~13634044 0.00000000 0.00000000 A-6 0.00 5.~~56750~~32000% ~~965~~956.~~46215882~~57022868 4.~~47934191~~24079485 0.00000000 0.00000000 M-1 38,069,000.00 2.~~53250~~78000% ~~965~~956.~~46215897~~57022880 2.~~10544511~~21605427 0.00000000 0.00000000 M-2 28,266,000.00 3.~~08250~~33000% ~~965~~956.~~46215878~~57022890 2.~~56269865~~65448242 0.00000000 0.00000000 B 26,215,000.00 34.~~83250~~08000% ~~965~~956.~~46215907~~57022888 3.~~18622621~~25233874 0.00000000 0.00000000 C 3,875,954.58 0.00000% 999.81641168 0.00000000 0.00000000 0.00000000 P 100.00 0.00000% 1000.00000000 0.00000000 0.00000000 0.00000000 R-1 0.00 0.00000% 0.00000000 0.00000000 0.00000000 0.00000000 R-2 0.00 0.00000% 0.00000000 0.00000000 0.00000000 0.00000000 R-3 0.00 0.00000% 0.00000000 0.00000000 0.00000000 0.00000000 (5) Per $1 denomination.

Interest Distribution Factors Statement (continued) Remaining Ending Non-Supported Total Unpaid Certificate/ Interest Realized Interest Interest Notional Class Shortfall Losses (6) Distribution Shortfall Balance A-1 0.00000000 0.00000000 4.~~28826107~~24876613 0.00000000 ~~956~~938.~~57022893~~13208653 A-2 0.00000000 0.00000000 4.~~42503489~~38428023 0.00000000 ~~956~~938.~~57022890~~13208651 A-3 0.00000000 0.00000000 4.~~20374987~~15966067 0.00000000 ~~950~~929.~~77959280~~88303133 A-4 0.00000000 0.00000000 4.37500000 0.00000000 1000.00000000 A-5 0.00000000 0.00000000 12.~~95707206~~13634044 0.00000000 ~~956~~938.~~57022868~~13208676 A-6 0.00000000 0.00000000 4.~~47934191~~24079485 0.00000000 ~~956~~938.~~57022868~~13208676 M-1 0.00000000 0.00000000 2.~~10544511~~21605427 0.00000000 ~~956~~938.~~57022880~~13208647 M-2 0.00000000 0.00000000 2.~~56269865~~65448242 0.00000000 ~~956~~938.~~57022890~~13208661 B 0.00000000 0.00000000 3.~~18622621~~25233874 0.00000000 ~~956~~938.~~57022888~~13208659 C 0.00000000 0.00000000 ~~113~~109.~~57606776~~76373722 0.00000000 999.81641168 P 0.00000000 0.00000000 ~~305099~~4885.~~50000000~~40000000 0.00000000 1000.00000000 R-1 0.00000000 0.00000000 0.00000000 0.00000000 0.00000000 R-2 0.00000000 0.00000000 0.00000000 0.00000000 0.00000000 R-3 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 610,~~390~~642,~~007~~142.3524 Liquidations, Insurance Proceeds, Reserve Funds 0.00 Proceeds from Repurchased Loans 0.00 Other Amounts (Servicer Advances) ~~107~~141,~~422~~516.9519 Realized Loss (Gains, Subsequent Expenses & Recoveries) 0.00 Prepayment Penalties 0.00 Total Deposits 610,~~497~~783,~~430~~658.3043 Withdrawals Reimbursement for Servicer Advances 84107,~~635~~422.4495 Payment of Service Fee 9594,~~755~~884.6637 Payment of Interest and Principal 610,~~317~~581,~~039~~351.2011 Total Withdrawals (Pool Distribution Amount) 610,~~497~~783,~~430~~658.3043 Ending Balance 0.00

SERVICING FEES Gross Servicing Fee 9190,~~728~~891.7435 Master Servicing Fee 3,~~669~~635.1565 Miscellaneous Fee 357.7737 Supported Prepayment/Curtailment Interest Shortfall 0.00 Net Servicing Fee 9594,~~755~~884.6637

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 3 0 0 3 253,~~499~~282.7724 0.00 0.00 253,~~499~~282.7724 30 Days 5562 0 0 0 5562 1215,~~628~~134,~~637~~555.8870 0.00 0.00 0.00 1215,~~628~~134,~~637~~555.8870 60 Days 1319 0 0 0 1319 23,~~034~~517,~~850~~227.2164 0.00 0.00 0.00 23,~~034~~517,~~850~~227.2164 90 Days 97 0 0 0 97 1,~~469~~362,~~735~~583.5243 0.00 0.00 0.00 1,~~469~~362,~~735~~583.5243 120 Days 04 0 03 0 07 0396,930.0062 0.00 0598,345.0008 0.00 0995,275.0070 150 Days 10 0 0 0 10 ~~185,165~~0.8300 0.00 0.00 0.00 ~~185,165~~0.8300 180+ Days 01 0 0 0 01 0185,165.0083 0.00 0.00 0.00 0185,165.0083 Totals 7893 3 03 0 8199 1620,~~318~~596,~~389~~463.4422 253,~~499~~282.7724 0598,345.0008 0.00 1621,~~571~~448,~~889~~090.2154 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.~~157729~~160428% 0.000000% 0.000000% 0.~~157729~~160428% 0.~~058055~~059132% 0.000000% 0.000000% 0.~~058055~~059132% 30 Days 23.~~891693~~315508% 0.000000% 0.000000% 0.000000% 23.~~891693~~315508% 23.~~892119~~533331% 0.000000% 0.000000% 0.000000% 23.~~892119~~533331% 60 Days 01.~~683491~~016043% 0.000000% 0.000000% 0.000000% 01.~~683491~~016043% 0.~~466007~~821136% 0.000000% 0.000000% 0.000000% 0.~~466007~~821136% 90 Days 0.~~473186~~374332% 0.000000% 0.000000% 0.000000% 0.~~473186~~374332% 0.~~336588~~318110% 0.000000% 0.000000% 0.000000% 0.~~336588~~318110% 120 Days 0.~~000000~~213904% 0.000000% 0.~~000000~~160428% 0.000000% 0.~~000000~~374332% 0.~~000000~~092668% 0.000000% 0.~~000000~~139690% 0.000000% 0.~~000000~~232358% 150 Days 0.~~052576~~000000% 0.000000% 0.000000% 0.000000% 0.~~052576~~000000% 0.~~042405~~000000% 0.000000% 0.000000% 0.000000% 0.~~042405~~000000% 180+ Days 0.~~000000~~053476% 0.000000% 0.000000% 0.000000% 0.~~000000~~053476% 0.~~000000~~043229% 0.000000% 0.000000% 0.000000% 0.~~000000~~043229% Totals 4.~~100946~~973262% 0.~~157729~~160428% 0.~~000000~~160428% 0.000000% 45.~~258675~~294118% 34.~~737119~~808475% 0.~~058055~~059132% 0.~~000000~~139690% 0.000000% 35.~~795174~~007297%

OTHER INFORMATION Current Period Class A Insufficient Funds 0.00 Principal Balance of Contaminated Properties 0.00 Periodic Advance ~~107~~141,~~422~~516.9519

COLLATERAL STATEMENT Collateral Description Mixed Fixed Weighted Average Gross Coupon 6.~~439698~~439175% Weighted Average Net Coupon 6.~~189698~~189175% Weighted Average Pass-Through Rate 6.~~178723~~178192% Weighted Average Maturity(Stepdown Calculation ) ~~328~~327 Beginning Scheduled Collateral Loan Count 1,~~920~~902 Number Of Loans Paid In Full 1832 Ending Scheduled Collateral Loan Count 1,~~902~~870 Beginning Scheduled Collateral Balance ~~440~~436,~~297~~278,~~930~~466.0043 Ending Scheduled Collateral Balance ~~436~~427,~~278~~943,~~466~~780.4373 Ending Actual Collateral Balance at 3130-~~Oct~~Nov-2004 ~~436~~428,~~656~~336,~~892~~730.0489 Monthly P &I Constant 2,~~802~~779,~~688~~719.9025 Special Servicing Fee 0.00 Prepayment Penalties 0.00 Realized Loss Amount 0.00 Cumulative Realized Loss 0.00 Scheduled Principal ~~439~~438,~~867~~658.5106 Unscheduled Principal 37,~~579~~896,~~596~~027.0664 Required Overcollateralization Amount 0.00 Overcollateralized Increase Amount 0.00 Overcollateralized reduction Amount 0.00 Specified O/C Amount 3,875,243.00 Overcollateralized Amount 3,875,243.00 Overcollateralized Deficiency Amount 0.00 Base Overcollateralized Amount 0.00 Extra principal distribution Amount 0.00 Excess Cash Amount ~~470~~425,~~725~~927.6380

Miscellaneous Reporting Net Wac Rate Carryover Amount A-1 0.00 Net Wac Rate Carryover Amount A-2 0.00 Net Wac Rate Carryover Amount A-3 0.00 Net Wac Rate Carryover Amount A-4 0.00 Net Wac Rate Carryover Amount A-5 0.00 Net Wac Rate Carryover Amount A-6 0.00 Net Wac Rate Carryover Amount B 0.00 Net Wac Rate Carryover Amount M-1 0.00 Net Wac Rate Carryover Amount M-2 0.00 Three Month Rolling Average 0.~~006758~~010596%

Filing Compare · BEAR STEARNS ASSET BACKED SECURITIES I TRUST 2004-AC4