8-K 1 abf04op4_sep.txt SEPT. 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): September 27, 2004 ASSET BACKED FUNDING CORPORATION Asset Backed Certificates, Series 2004-OPT4 Trust (Exact name of registrant as specified in its charter) New York (governing law of 333-108551-07 54-2155107 Pooling and Servicing Agreement) (Commission 54-2155108 (State or other File Number) 54-6621650 jurisdiction 54-6621651 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) 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 September 27, 2004 a distribution was made to holders of ASSET BACKED FUNDING CORPORATION, Asset Backed Certificates, Series 2004-OPT4 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-OPT4 Trust, relating to the September 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. ASSET BACKED FUNDING CORPORATION Asset Backed Certificates, Series 2004-OPT4 Trust (Registrant) By: Wells Fargo Bank, N.A. as Trustee By: /s/ Beth Belfield as Assistant Vice President By: Beth Belfield as Assistant Vice President Date: 9/29/04 INDEX TO EXHIBITS Exhibit Number Description EX-99.1 Monthly report distributed to holders of Asset Backed Certificates, Series 2004-OPT4 Trust, relating to the September 27, 2004 distribution. EX-99.1

Asset Backed Funding Corporation ~~Asset~~Mortgage ~~Backed~~Pass-Through Certificates Record Date: 78/31/04 Distribution Date: 89/2527/04 ABFC Series: 2004-~~OPT4~~OP4 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 04542BHB1 SEN 1.~~76000~~92500% ~~570~~560,~~772~~801,~~832~~975.1090 ~~837~~989,~~133~~581.4982 910,~~970~~708,~~856~~837.2041 A-2 04542BHC9 SEN 1.~~76000~~92500% 9796,~~515~~462,~~062~~019.9860 ~~143~~170,~~022~~215.0927 12,~~053~~866,~~043~~520.3808 M-1 04542BHD7 SUB 2.~~05000~~21500% 42,905,000.00 7387,~~296~~115.0403 0.00 M-2 04542BHE5 SUB 2.~~63000~~79500% 30,309,000.00 6677,~~427~~654.2318 0.00 M-3 04542BHF2 SUB 23.~~90000~~06500% 5,117,000.00 1214,~~366~~376.0864 0.00 M-4 04542BHG0 SUB 3.~~25000~~41500% 7,872,000.00 2124,~~320~~642.0064 0.00 M-5 04542BHH8 SUB 3.~~45000~~61500% 5,511,000.00 1518,~~844~~262.1308 0.00 M-6 04542BHJ4 SUB 45.~~95000~~11500% 7,872,000.00 3236,~~472~~909.0084 0.00 M-7 04542BHK1 SUB 45.~~95000~~11500% 6,692,000.00 2731,~~604~~377.5012 0.00 CE ABF04OP4C SEN 0.00000% 3,936,776.66 2,~~677~~397,~~213~~973.7767 0.00 R1 ABF4OP4R1 SEN 0.00000% 0.00 0.00 0.00 R2 ABF4OP4R2 SEN 0.00000% 0.00 0.00 0.00 P ABF04OP4P SEN 0.00000% 0.00 ~~182~~239,~~200~~417.7608 0.00 Totals ~~778~~767,~~502~~478,~~671~~772.7416 4,~~088~~087,~~900~~525.0937 1113,~~023~~575,~~899~~357.5849

Certificateholder Distribution Summary (continued) Current Ending Cumulative Realized Certificate Total Realized Class Loss Balance Distribution Losses A-1 0.00 ~~560~~550,~~801~~093,~~975~~138.9049 1011,~~807~~698,~~989~~419.6923 0.00 A-2 0.00 9693,~~462~~595,~~019~~499.6052 13,~~196~~036,~~065~~735.4735 0.00 M-1 0.00 42,905,000.00 7387,~~296~~115.0403 0.00 M-2 0.00 30,309,000.00 6677,~~427~~654.2318 0.00 M-3 0.00 5,117,000.00 1214,~~366~~376.0864 0.00 M-4 0.00 7,872,000.00 2124,~~320~~642.0064 0.00 M-5 0.00 5,511,000.00 1518,~~844~~262.1308 0.00 M-6 0.00 7,872,000.00 3236,~~472~~909.0084 0.00 M-7 0.00 6,692,000.00 2731,~~604~~377.5012 0.00 CE 0.00 3,936,776.66 2,~~677~~397,~~213~~973.7767 0.00 R1 0.00 0.00 0.00 0.00 R2 0.00 0.00 0.00 0.00 P 0.00 0.00 ~~182~~239,~~200~~417.7608 0.00 Totals 0.00 ~~767~~753,~~478~~903,~~772~~414.1667 1517,~~112~~662,~~799~~882.6786 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-1 578,603,000.00 ~~570~~560,~~772~~801,~~832~~975.1090 0.00 910,~~970~~708,~~856~~837.2041 0.00 0.00 A-2 98,426,000.00 9796,~~515~~462,~~062~~019.9860 0.00 12,~~053~~866,~~043~~520.3808 0.00 0.00 M-1 42,905,000.00 42,905,000.00 0.00 0.00 0.00 0.00 M-2 30,309,000.00 30,309,000.00 0.00 0.00 0.00 0.00 M-3 5,117,000.00 5,117,000.00 0.00 0.00 0.00 0.00 M-4 7,872,000.00 7,872,000.00 0.00 0.00 0.00 0.00 M-5 5,511,000.00 5,511,000.00 0.00 0.00 0.00 0.00 M-6 7,872,000.00 7,872,000.00 0.00 0.00 0.00 0.00 M-7 6,692,000.00 6,692,000.00 0.00 0.00 0.00 0.00 CE 3,936,776.66 3,936,776.66 0.00 0.00 0.00 0.00 R1 0.00 0.00 0.00 0.00 0.00 0.00 R2 0.00 0.00 0.00 0.00 0.00 0.00 P 0.00 0.00 0.00 0.00 0.00 0.00 Totals 787,243,776.66 ~~778~~767,~~502~~478,~~671~~772.7416 0.00 1113,~~023~~575,~~899~~357.5849 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-1 910,~~970~~708,~~856~~837.2041 ~~560~~550,~~801~~093,~~975~~138.9049 0.~~96923448~~95072638 910,~~970~~708,~~856~~837.2041 A-2 12,~~053~~866,~~043~~520.3808 9693,~~462~~595,~~019~~499.6052 0.~~98004612~~95092252 12,~~053~~866,~~043~~520.3808 M-1 0.00 42,905,000.00 1.00000000 0.00 M-2 0.00 30,309,000.00 1.00000000 0.00 M-3 0.00 5,117,000.00 1.00000000 0.00 M-4 0.00 7,872,000.00 1.00000000 0.00 M-5 0.00 5,511,000.00 1.00000000 0.00 M-6 0.00 7,872,000.00 1.00000000 0.00 M-7 0.00 6,692,000.00 1.00000000 0.00 CE 0.00 3,936,776.66 1.00000000 0.00 R1 0.00 0.00 0.00000000 0.00 R2 0.00 0.00 0.00000000 0.00 P 0.00 0.00 0.00000000 0.00 Totals 1113,~~023~~575,~~899~~357.5849 ~~767~~753,~~478~~903,~~772~~414.1667 0.~~97489341~~95764925 1113,~~023~~575,~~899~~357.5849

Principal Distribution Factors Statement Original Beginning Scheduled Unscheduled Face Certificate Principal Principal Class (2) Amount Balance Distribution Distribution Accretion A-1 578,603,000.00 ~~986~~969.~~46711493~~23447666 0.00000000 1718.~~23263827~~50809175 0.00000000 A-2 98,426,000.00 ~~990~~980.~~74495540~~04612196 0.00000000 1029.~~69883344~~12360636 0.00000000 M-1 42,905,000.00 1000.00000000 0.00000000 0.00000000 0.00000000 M-2 30,309,000.00 1000.00000000 0.00000000 0.00000000 0.00000000 M-3 5,117,000.00 1000.00000000 0.00000000 0.00000000 0.00000000 M-4 7,872,000.00 1000.00000000 0.00000000 0.00000000 0.00000000 M-5 5,511,000.00 1000.00000000 0.00000000 0.00000000 0.00000000 M-6 7,872,000.00 1000.00000000 0.00000000 0.00000000 0.00000000 M-7 6,692,000.00 1000.00000000 0.00000000 0.00000000 0.00000000 CE 3,936,776.66 1000.00000000 0.00000000 0.00000000 0.00000000 R1 0.00 0.00000000 0.00000000 0.00000000 0.00000000 R2 0.00 0.00000000 0.00000000 0.00000000 0.00000000 P 0.00 0.00000000 0.00000000 0.00000000 0.00000000 (2) All Classes are per $1,000 denomination.

Principal Distribution Factors Statement (continued) Total Ending Ending Total Realized Principal Certificate Certificate Principal Class Loss (3) Reduction Balance Percentage Distribution A-1 0.00000000 1718.~~23263827~~50809175 ~~969~~950.~~23447666~~72638491 0.~~96923448~~95072638 1718.~~23263827~~50809175 A-2 0.00000000 1029.~~69883344~~12360636 ~~980~~950.~~04612196~~92251560 0.~~98004612~~95092252 1029.~~69883344~~12360636 M-1 0.00000000 0.00000000 1,000.00000000 1.00000000 0.00000000 M-2 0.00000000 0.00000000 1,000.00000000 1.00000000 0.00000000 M-3 0.00000000 0.00000000 1,000.00000000 1.00000000 0.00000000 M-4 0.00000000 0.00000000 1,000.00000000 1.00000000 0.00000000 M-5 0.00000000 0.00000000 1,000.00000000 1.00000000 0.00000000 M-6 0.00000000 0.00000000 1,000.00000000 1.00000000 0.00000000 M-7 0.00000000 0.00000000 1,000.00000000 1.00000000 0.00000000 CE 0.00000000 0.00000000 1,000.00000000 1.00000000 0.00000000 R1 0.00000000 0.00000000 0.00000000 0.00000000 0.00000000 R2 0.00000000 0.00000000 0.00000000 0.00000000 0.00000000 P 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-1 578,603,000.00 1.~~76000~~92500% ~~570~~560,~~772~~801,~~832~~975.1090 ~~837~~989,~~133~~581.4982 0.00 0.00 A-2 98,426,000.00 1.~~76000~~92500% 9796,~~515~~462,~~062~~019.9860 ~~143~~170,~~022~~215.0927 0.00 0.00 M-1 42,905,000.00 2.~~05000~~21500% 42,905,000.00 7387,~~296~~115.0403 0.00 0.00 M-2 30,309,000.00 2.~~63000~~79500% 30,309,000.00 6677,~~427~~654.2318 0.00 0.00 M-3 5,117,000.00 23.~~90000~~06500% 5,117,000.00 1214,~~366~~376.0864 0.00 0.00 M-4 7,872,000.00 3.~~25000~~41500% 7,872,000.00 2124,~~320~~642.0064 0.00 0.00 M-5 5,511,000.00 3.~~45000~~61500% 5,511,000.00 1518,~~844~~262.1308 0.00 0.00 M-6 7,872,000.00 45.~~95000~~11500% 7,872,000.00 3236,~~472~~909.0084 0.00 0.00 M-7 6,692,000.00 45.~~95000~~11500% 6,692,000.00 2731,~~604~~377.5012 0.00 0.00 CE 3,936,776.66 0.00000% 3,936,776.66 0.00 0.00 0.00 R1 0.00 0.00000% 0.00 0.00 0.00 0.00 R2 0.00 0.00000% 0.00 0.00 0.00 0.00 P 0.00 0.00000% 0.01 0.00 0.00 0.00 Totals 787,243,776.66 1,~~229~~450,~~485~~134.5662 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 ~~837~~989,~~133~~581.4982 0.00 ~~560~~550,~~801~~093,~~975~~138.9049 A-2 0.00 0.00 ~~143~~170,~~022~~215.0927 0.00 9693,~~462~~595,~~019~~499.6052 M-1 0.00 0.00 7387,~~296~~115.0403 0.00 42,905,000.00 M-2 0.00 0.00 6677,~~427~~654.2318 0.00 30,309,000.00 M-3 0.00 0.00 1214,~~366~~376.0864 0.00 5,117,000.00 M-4 0.00 0.00 2124,~~320~~642.0064 0.00 7,872,000.00 M-5 0.00 0.00 1518,~~844~~262.1308 0.00 5,511,000.00 M-6 0.00 0.00 3236,~~472~~909.0084 0.00 7,872,000.00 M-7 0.00 0.00 2731,~~604~~377.5012 0.00 6,692,000.00 CE 0.00 0.00 2,~~677~~397,~~213~~973.7767 0.00 3,936,776.66 R1 0.00 0.00 0.00 0.00 0.00 R2 0.00 0.00 0.00 0.00 0.00 P 0.00 0.00 ~~182~~239,~~200~~417.7608 0.00 0.01 Totals 0.00 0.00 4,~~088~~087,~~900~~525.0937 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-1 578,603,000.00 1.~~76000~~92500% ~~986~~969.~~46711493~~23447666 1.~~44681844~~71029500 0.00000000 0.00000000 A-2 98,426,000.00 1.~~76000~~92500% ~~990~~980.~~74495540~~04612196 1.~~45309258~~72937303 0.00000000 0.00000000 M-1 42,905,000.00 2.~~05000~~21500% 1000.00000000 12.~~70833329~~03041673 0.00000000 0.00000000 M-2 30,309,000.00 2.~~63000~~79500% 1000.00000000 2.~~19166683~~56208321 0.00000000 0.00000000 M-3 5,117,000.00 23.~~90000~~06500% 1000.00000000 2.~~41666602~~80958374 0.00000000 0.00000000 M-4 7,872,000.00 3.~~25000~~41500% 1000.00000000 23.~~70833333~~13041667 0.00000000 0.00000000 M-5 5,511,000.00 3.~~45000~~61500% 1000.00000000 23.~~87500091~~31375068 0.00000000 0.00000000 M-6 7,872,000.00 45.~~95000~~11500% 1000.00000000 4.~~12500000~~68875000 0.00000000 0.00000000 M-7 6,692,000.00 45.~~95000~~11500% 1000.00000000 4.~~12500000~~68875075 0.00000000 0.00000000 CE 3,936,776.66 0.00000% 1000.00000000 0.00000000 0.00000000 0.00000000 R1 0.00 0.00000% 0.00000000 0.00000000 0.00000000 0.00000000 R2 0.00 0.00000% 0.00000000 0.00000000 0.00000000 0.00000000 P 0.00 0.00000% 0.00000000 0.00000000 0.00000000 0.00000000 (5) All Classes are per $1,000 denomination.

Interest Distribution Factors Statement (continued) Remaining Ending Non-Supported Total Unpaid Certificate/ Interest Realized Interest Interest Notional Class Shortfall Losses (6) Distribution Shortfall Balance A-1 0.00000000 0.00000000 1.~~44681844~~71029500 0.00000000 ~~969~~950.~~23447666~~72638491 A-2 0.00000000 0.00000000 1.~~45309258~~72937303 0.00000000 ~~980~~950.~~04612196~~92251560 M-1 0.00000000 0.00000000 12.~~70833329~~03041673 0.00000000 1000.00000000 M-2 0.00000000 0.00000000 2.~~19166683~~56208321 0.00000000 1000.00000000 M-3 0.00000000 0.00000000 2.~~41666602~~80958374 0.00000000 1000.00000000 M-4 0.00000000 0.00000000 23.~~70833333~~13041667 0.00000000 1000.00000000 M-5 0.00000000 0.00000000 23.~~87500091~~31375068 0.00000000 1000.00000000 M-6 0.00000000 0.00000000 4.~~12500000~~68875000 0.00000000 1000.00000000 M-7 0.00000000 0.00000000 4.~~12500000~~68875075 0.00000000 1000.00000000 CE 0.00000000 0.00000000 ~~680~~609.~~05223593~~12108486 0.00000000 1000.00000000 R1 0.00000000 0.00000000 0.00000000 0.00000000 0.00000000 R2 0.00000000 0.00000000 0.00000000 0.00000000 0.00000000 P 0.00000000 0.00000000 0.00000000 0.00000000 0.00000000 (6) Amount Does Not Include Excess Special Hazard, Bankruptcy,or Fraud Losses Unless Otherwise Disclosed. Please Refer to the Prospectus Supplement for a Full Description.

CERTIFICATEHOLDER ACCOUNT STATEMENT CERTIFICATE ACCOUNT Beginning Balance 0.00 Deposits Payments of Interest and Principal 1518,~~617~~102,~~273~~907.0975 Liquidations, Insurance Proceeds, Reserve Funds 0.00 Proceeds from Repurchased Loans 0.00 Other Amounts (Servicer Advances) 0.00 Realized Loss (Gains, Subsequent Expenses & Recoveries) 0.00 Prepayment Penalties ~~182~~239,~~200~~417.7608 Total Deposits 1518,~~799~~342,~~473~~324.8583 Withdrawals Reimbursement for Servicer Advances 0.00 Payment of Service Fee ~~686~~679,~~674~~441.1897 Payment of Interest and Principal 1517,~~112~~662,~~799~~882.6786 Total Withdrawals (Pool Distribution Amount) 1518,~~799~~342,~~473~~324.8583 Ending Balance 0.00

SERVICING FEES Gross Servicing Fee ~~194~~191,~~625~~869.6770 Credit Risk Manager Fee 9,~~731~~593.2848 PMI Premium ~~476~~472,~~802~~542.8448 Trustee 5,~~514~~436.3931 Supported Prepayment/Curtailment Interest Shortfall 0.00 Net Servicing Fee ~~686~~679,~~674~~441.1897

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 23 0 0 23 ~~203~~297,~~555~~094.4143 0.00 0.00 ~~203~~297,~~555~~094.4143 30 Days 4451 0 0 0 4451 7,~~487~~946,~~928~~111.7628 0.00 0.00 0.00 7,~~487~~946,~~928~~111.7628 60 Days 16 1 010 0 027 ~~1 319~~2,~~290~~959,812.2010 067,848.0018 01,740,950.0013 0.00 ~~319~~4,~~290~~768,610.2041 90 Days 12 0 0 0 12 ~~118~~437,~~429~~386.6021 0.00 0.00 0.00 ~~118~~437,~~429~~386.6021 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 4669 24 010 0 4883 711,~~925~~343,~~648~~309.5659 ~~203~~364,~~555~~942.4161 01,740,950.0013 0.00 813,~~129~~449,~~203~~202.9733 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.~~041186~~062735% 0.000000% 0.000000% 0.~~041186~~062735% 0.~~026515~~039397% 0.000000% 0.000000% 0.~~026515~~039397% 30 Days 01.~~906096~~066499% 0.000000% 0.000000% 0.000000% 01.~~906096~~066499% 01.~~975386~~053716% 0.000000% 0.000000% 0.000000% 01.~~975386~~053716% 60 Days 0.~~020593~~334588% 0.~~000000~~020912% 0.~~000000~~209118% 0.000000% 0.~~020593~~564617% 0.~~041591~~392494% 0.~~000000~~008997% 0.~~000000~~230864% 0.000000% 0.~~041591~~632355% 90 Days 0.~~020593~~041824% 0.000000% 0.000000% 0.000000% 0.~~020593~~041824% 0.~~015427~~058001% 0.000000% 0.000000% 0.000000% 0.~~015427~~058001% 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 01.~~947282~~442911% 0.~~041186~~083647% 0.~~000000~~209118% 0.000000% 01.~~988468~~735675% 1.~~032403~~504211% 0.~~026515~~048394% 0.~~000000~~230864% 0.000000% 1.~~058919~~783469%

OTHER INFORMATION Current Period Class A Insufficient Funds 0.00 Principal Balance of Contaminated Properties 0.00 Periodic Advance 872,~~551~~794.4527

COLLATERAL STATEMENT Collateral Description Mixed Fixed & Arm Weighted Average Gross Coupon 7.~~080321~~079101% Weighted Average Net Coupon 6.~~780321~~779101% Weighted Average Pass-Through Rate 6.~~021867~~016752% Weighted Average Maturity(Stepdown Calculation ) ~~351~~350 Beginning Scheduled Collateral Loan Count 4,~~911~~856 Number Of Loans Paid In Full 5574 Ending Scheduled Collateral Loan Count 4,~~856~~782 Beginning Scheduled Collateral Balance ~~778~~767,~~502~~478,~~671~~772.7416 Ending Scheduled Collateral Balance ~~767~~753,~~478~~903,~~772~~414.1667 Ending Actual Collateral Balance at 31-~~Jul~~Aug-2004 ~~767~~754,~~689~~103,~~054~~602.51 Monthly P &I Constant 5,~~283~~210,~~375~~388.8087 Special Servicing Fee 0.00 Prepayment Penalties ~~182~~239,~~200~~417.7608 Realized Loss Amount 0.00 Cumulative Realized Loss 0.00 Scheduled Principal ~~690~~682,~~002~~838.0389 Unscheduled Principal 1012,~~333~~892,~~897~~518.5560 Required Overcollateralization Amount 0.00 Overcollateralized Increase Amount 0.00 Overcollateralized reduction Amount 0.00 Specified O/C Amount 3,936,776.66 Overcollateralized Amount 3,936,776.66 Overcollateralized Deficiency Amount 0.00 Base Overcollateralized Amount 0.00 Extra principal distribution Amount 0.00 Excess Cash Amount 2,~~677~~397,~~213~~973.7767

Group Level Collateral Statement Group 1 2 Total Collateral Description Fixed 15/30 & ARM Fixed 15/30 & ARM Mixed Fixed & Arm Weighted Average Coupon Rate 7.~~112799~~111241 6.~~890102~~891951 7.~~080321~~079101 Weighted Average Net Rate 6.~~812799~~811241 6.~~590102~~591951 6.~~780321~~779101 Weighted Average Maturity ~~352~~89 ~~351~~(1) ~~351~~350 Beginning Loan Count 4,~~587~~535 ~~324~~321 4,~~911~~856 Loans Paid In Full 5267 37 5574 Ending Loan Count 4,~~535~~468 ~~321~~314 4,~~856~~782 Beginning Scheduled Balance ~~664~~654,~~964~~993,~~850~~994.9474 ~~113~~112,~~537~~484,~~820~~777.8042 ~~778~~767,~~502~~478,~~671~~772.7416 Ending scheduled Balance ~~654~~644,~~993~~285,~~994~~157.7433 ~~112~~109,~~484~~618,~~777~~257.4234 ~~767~~753,~~478~~903,~~772~~414.1667 Record Date 0708/31/2004 0708/31/2004 0708/31/2004 Principal And Interest Constant 4,~~524~~459,~~828~~297.9079 ~~758~~751,~~546~~091.9008 5,~~283~~210,~~375~~388.8087 Scheduled Principal ~~583~~577,~~361~~780.0777 ~~106~~105,~~640~~058.9612 ~~690~~682,~~002~~838.0389 Unscheduled Principal 910,~~387~~131,~~495~~056.1364 ~~946~~2,~~402~~761,461.4296 1012,~~333~~892,~~897~~518.5560 Scheduled Interest 3,~~941~~881,~~467~~517.8302 ~~651~~646,~~905~~032.9496 4,~~593~~527,~~373~~549.7798 Servicing Fees ~~166~~163,~~241~~748.2150 28,~~384~~121.4620 ~~194~~191,~~625~~869.6770 Master Servicing Fees 0.00 0.00 0.00 Trustee Fee 4,~~710~~639.1754 ~~804~~796.2277 5,~~514~~436.3931 FRY Amount 0.00 0.00 0.00 Special Hazard Fee 0.00 0.00 0.00 Other Fee 8,~~312~~187.0642 1,~~419~~406.2206 9,~~731~~593.2848 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 ~~413~~409,941.9671 62,~~860~~600.8877 ~~476~~472,~~802~~542.8448 Net Interest 3,~~348~~294,~~262~~999.4385 ~~558~~553,~~437~~108.16 3,~~906~~848,~~699~~108.5901 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 6.~~042297~~036695 5.~~902215~~900621 6.~~021867~~016752

Miscellaneous Reporting Group 1 Group 1 Available Funds 1314,~~319~~003,~~118~~837.3753 Group 2 Group 2 Available Funds 13,~~611~~419,~~480~~628.5324

Group

Filing Compare · Asset-Backed Funding Corp. ABFC Asset Backed Certificates, Series 2004-OPT4