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 26, 2003

     ASSET  BACKED  FUNDING  CORPORATION,  (as  depositor  under the Pooling and
Servicing Agreement, dated August 1, 2003 providing for the issuance of 2003-CB4
Trust, C-BASS Mortgage Loan Asset-Backed Certificates, Series 2003-CB4).

                       ASSET BACKED FUNDING CORPORATION
             (Exact name of registrant as specified in its charter)


         Delaware                  333-90830-07                 75-2533468
     (State or other          (Commission File Number)       (IRS Employer
     jurisdiction of                                       Identification No.)
     incorporation)


100 North Tyron Sreet
Charlotte, North Carolina                                        28255
(Address pof principal executive offices)                       (Zip Code)


       Registrant's telephone number, including area code : (703) 386-2400

                                       N/A
         (Former name or former address, if changed since last report.)


<page>



Item 5.    Other Events.


     This  current  report  on Form  8-K  relates  to the  monthly  distribution
reported to the holders of 2003-CB4  Trust,  C-BASS  Mortgage Loan  Asset-Backed
Certificates, Series 2003-CB4 pursuant to the terms of the Pooling and Servicing
Agreement,  dated August 1, 2003 among Asset Backed Funding Corp., as depositor,
Litton Loan Servicing LP as servicer, and JPMorgan Chase Bank, as trustee.

     On December 26, 2003  distributions  were made to the  Certificateholders.
Specific information with respect to the distributions is filed as Exhibit 99.1.
No other  reportable  transactions  or matters have occurred  during the current
reporting period.



Item 7.    Financial Statements and Exhibits.

           (a)   Not applicable

           (b)   Not applicable

           (c)   The following exhibit is filed as part of this report:

                 Statement to Certificateholders on December 26, 2003
                 as Exhibit 99.1.





<page>

2003-CB4 Trust
C-BASS Mortgage  Loan  Asset-Backed  Certificates,  Series 2003-CB4
- -------------------------------------------------------------------------------



SIGNATURE


     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.

                                     JPMorgan Chase Bank,


Date: January 5, 2004                  By: /s/  Diane E. Wallace
                                       ------------------------------------
                                        Diane E. Wallace
                                        Assistant Vice President







<page>
INDEX TO EXHIBITS


      Exhibit
      Number                  Description of Exhibits

        99.1             Statement to Certificateholders
                         December 26, 2003


                                      -4-




                                  Exhibit 99.1

                         Statement to Certificateholders
                                  December 26, 2003


<page>

<table>

                         CREDIT-BASED LOAN ASSET-BACKED CERTIFICATES, SERIES 2003-CB4
                                           STATEMENT TO CERTIFICATEHOLDERS
                                               December 26, 2003

<s>       <c>       <c>
- -----------------------------------------------------------------------------------------------------------------------------------
                                             DISTRIBUTION IN DOLLARS
- -----------------------------------------------------------------------------------------------------------------------------------
                ORIGINAL        BEGINNING                                                                               ENDING
                    FACE         PRINCIPAL                                               REALIZED     DEFERRED        PRINCIPAL
CLASS              VALUE          BALANCE      PRINCIPAL   INTEREST        TOTAL         LOSSES       INTEREST        BALANCE
- ----------------------------------------------------------------------------------------------------------------------------------
AF1      72,600,000.00    66,679,387.86       993,882.08    222,055.31   1,215,937.39     0.00        0.00       65,685,505.78
AV1      60,000,000.00    55,843,764.45       891,915.49     71,523.12     963,438.61     0.00        0.00       54,951,848.96
AV2     162,700,000.00   150,709,254.80     3,919,875.47    191,727.62   4,111,603.09     0.00        0.00      146,789,379.33
M1       22,930,000.00    22,930,000.00             0.00     35,680.64      35,680.64     0.00        0.00       22,930,000.00
M2       20,180,000.00    20,180,000.00             0.00     48,935.92      48,935.92     0.00        0.00       20,180,000.00
B1       10,820,000.00    10,820,000.00             0.00     45,320.51      45,320.51     0.00        0.00       10,820,000.00
B2        5,690,000.00     5,690,000.00             0.00     25,056.83      25,056.83     0.00        0.00        5,690,000.00
N        15,700,000.00    11,491,045.30     1,378,179.10     70,765.69   1,448,944.79     0.00        0.00       10,112,866.20
R                 0.00             0.00             0.00          0.00           0.00     0.00        0.00                0.00
TOTALS  370,620,000.00   344,343,452.41     7,183,852.14    711,065.64   7,894,917.78     0.00        0.00      337,159,600.27

AIO     153,000,000.00   125,000,000.00             0.00    234,154.28     234,154.28        0.00        0.00   117,000,000.00
X                 0.00             0.00             0.00          0.00           0.00        0.00        0.00             0.00
- -----------------------------------------------------------------------------------------------------------------------------------

- --------------------------------------------------------------------------------------------------  ------------------------------
             FACTOR INFORMATION PER $1,000 OF ORIGINAL FACE                                           PASS-THROUGH RATES
- --------------------------------------------------------------------------------------------------  ------------------------------
                                                                                                                    CURRENT
                       BEGINNING                                                      ENDING                         PASS-THRU
CLASS     CUSIP        PRINCIPAL       PRINCIPAL        INTEREST        TOTAL       PRINCIPAL           CLASS          RATE
- --------------------------------------------------------------------------------------------------  ------------------------------
AF1      04542B DP4     918.44886860   13.68983581     3.05861309     16.74844890     904.75903278       AF1      4.000000 %
AV1      04542B DQ2     930.72940750   14.86525817     1.19205200     16.05731017     915.86414933       AV1      1.488750 %
AV2      04542B DR0     926.30150461   24.09265808     1.17841192     25.27107001     902.20884653       AV2      1.478750 %
M1       04542B DT6   1,000.00000000    0.00000000     1.55606803      1.55606803   1,000.00000000       M1       1.808750 %
M2       04542B DU3   1,000.00000000    0.00000000     2.42497126      2.42497126   1,000.00000000       M2       2.818750 %
B1       04542B DV1   1,000.00000000    0.00000000     4.18858688      4.18858688   1,000.00000000       B1       4.868750 %
B2       04542B DW9   1,000.00000000    0.00000000     4.40366081      4.40366081   1,000.00000000       B2       5.118750 %
N        N/A            731.91371338   87.78210828     4.50736879     92.28947707     644.13160510       N        7.390000 %
TOTALS                  929.10110736   19.38333641     1.91858410     21.30192051     909.71777095

AIO      04542B DS8     816.99346405    0.00000000     1.53042013      1.53042013     764.70588235       AIO      2.250000 %
- ---------------------------------------------------------------------------------------------  ----------------------------------

If there are any questions or problems with this statement, please contact the Administrator listed below:

                              TAOHEED A AGBABIAKA
               JPMorgan Chase Bank - Structured Finance Services
                          4 NEW YORK PLAZA, 6TH FLOOR,
                         New York, New York 10004-2477
                              Tel: (212) 623-4481
                              Fax: (212) 623-5858
                     Email: taoheed.agbabiaka@jpmorgan.com
                     ---------------------------------------



<page>
Sec. 4.06(iii) Overcollateralization Amount                                                        11,932,348.95
Sec. 4.06(iii) Target Overcollateralization Amount                                                 11,922,701.34
Sec. 4.06(iii) Overcollateralization Deficiency Amount                                                      0.00
Sec. 4.06(iii) Overcollateralization Release Amount                                                         0.00
Sec. 4.06(iii) Monthly Excess Interest                                                              1,353,167.73
Sec. 4.06(iii) Monthly Excess Cash Flow Amount                                                      1,353,167.73
Sec. 4.06(iii) Extra Principal Distribution Amount                                                          0.00

Sec. 4.06(iv) Servicing Compensation                                                                        0.00

Sec. 4.06(iv) Servicing Fee                                                                           143,645.01

Sec. 4.06(v) Current Advances                                                                         869,983.43

Sec. 4.06(vi) Group 1 Ending Collateral Balance                                                    83,295,702.56
Sec. 4.06(vi) Group 2 Ending Collateral Balance                                                    69,486,037.73
Sec. 4.06(vi) Group 3 Ending Collateral Balance                                                   186,197,342.73
Sec. 4.06(vi) Total Ending Collateral Balance                                                     338,979,083.02


Sec. 4.06(vii) Group 1 Beginning Number of Loans                                                          827.00
Sec. 4.06(vii) Group 2 Beginning Number of Loans                                                          450.00
Sec. 4.06(vii) Group 3 Beginning Number of Loans                                                        1,651.00
Sec. 4.06(vii) Total Beginning Number of Loans                                                          2,928.00

Sec. 4.06(vii) Group 1 Ending Number of Loans                                                             820.00
Sec. 4.06(vii) Group 2 Ending Number of Loans                                                             447.00
Sec. 4.06(vii) Group 3 Ending Number of Loans                                                           1,621.00
Sec. 4.06(vii) Total Ending Number of Loans                                                             2,888.00

Sec. 4.06(vii) Weighted Average Net Mortgage Rate for Group 1                                             7.58 %
Sec. 4.06(vii) Weighted Average Net Mortgage Rate for Group 2                                             7.58 %
Sec. 4.06(vii) Weighted Average Net Mortgage Rate for Group 3                                             7.90 %
Sec. 4.06(vii) Weighted Average Net Mortgage Rate for All Loans                                           7.76 %

Sec. 4.06(vii) Group 1 Weighted Average Term to Maturity                                                  303.00
Sec. 4.06(vii) Group 2 Weighted Average Term to Maturity                                                  337.00
Sec. 4.06(vii) Group 3 Weighted Average Term to Maturity                                                  338.00

Sec. 4.06(viii) Loans Delinquent
                                            Group 1
                                                                                      Principal
                                           Category              Number                Balance               Percentage
                                           1 Month                        24             2,241,756.75                  2.69 %
                                           2 Month                         8               854,710.64                  1.03 %
                                           3 Month                         9               960,524.28                  1.15 %
                                           Total                      41                 4,056,991.67                  4.87 %
                                            Group 2
                                                                                      Principal
                                           Category              Number                Balance               Percentage
                                           1 Month                        30             4,512,825.09                  6.49 %
                                           2 Month                         5               439,286.10                  0.63 %
                                           3 Month                         6               283,551.87                  0.41 %
                                           Total                      41                 5,235,663.06                  7.53 %
                                            Group 3
                                                                                      Principal
                                           Category              Number                Balance               Percentage
                                           1 Month                        82             8,798,830.37                  4.73 %
                                           2 Month                        31             4,000,754.58                  2.15 %
                                           3 Month                        39             3,659,475.64                  1.97 %
                                            Total                        152            16,459,060.59                  8.85 %
                                            Group Totals
                                                                                      Principal
                                           Category              Number                Balance               Percentage
                                           1 Month                       136            15,553,412.21                  4.59 %
                                           2 Month                        44             5,294,751.32                  1.56 %
                                           3 Month                        54             4,903,551.79                  1.45 %
                                            Total                        234            25,751,715.32                  7.60 %

                                           Please Note: Delinquency Numbers Include Bankruptcies and Foreclosures

Sec. 4.06(viii) Loans in Foreclosure
                                            Group 1
                                                                 Principal
                                            Number               Balance                Percentage
                                                      6              804,547.30                  0.97 %
                                            Group 2
                                                                 Principal
                                            Number               Balance                Percentage
                                                      3              197,281.19                  0.28 %
                                            Group 3
                                                                 Principal
                                            Number               Balance                Percentage
                                                     16            1,381,693.33                  0.74 %
                                           Group Totals
                                                                 Principal
                                            Number               Balance                Percentage
                                                     25            2,383,521.82                  0.70 %


Sec. 4.06(viii) Loans in Bankruptcy
                                            Group 1
                                                                 Principal
                                            Number               Balance                Percentage
                                                      2               89,196.77                  0.11 %
                                            Group 2
                                                                 Principal
                                            Number               Balance                Percentage
                                                      0                    0.00                  0.00 %

                                            Group 3
                                                                 Principal
                                            Number               Balance                Percentage
                                                      3              242,534.86                  0.13 %
                                           Group Totals
                                                                 Principal
                                            Number               Balance                Percentage
                                                      5              331,731.63                  0.10 %

Sec. 4.06(ix) Loans in REO
                                            Group 1
                                                                 Principal
                                            Number               Balance                Percentage
                                                      0                    0.00                  0.00 %
                                            Group 2
                                                                 Principal
                                            Number               Balance                Percentage
                                                      0                    0.00                  0.00 %
                                            Group 3
                                                                 Principal
                                            Number               Balance                Percentage
                                                      0                    0.00                  0.00 %
                                           Group Totals
                                                                 Principal
                                            Number               Balance                Percentage
                                                      0                    0.00                  0.00 %

Sec. 4.06(x) REO Book Value Group 1                                                                                       0.00
Sec. 4.06(x) REO Book Value Group 2                                                                                       0.00
Sec. 4.06(x) REO Book Value Group 3                                                                                       0.00

Sec. 4.06(xi) Unscheduled Principal
Group 1 Unscheduled Principal                                                                                       859,246.56
Group 2 Unscheduled Principal                                                                                       820,416.97
Group 3 Unscheduled Principal                                                                                     3,756,888.12
Total Unscheduled Principal                                                                                       5,436,551.65

Sec. 4.06(xii) Prepayment Penalties/Premiums                                                                         95,777.06

Sec. 4.06(xiii) Realized Losses
Group 1 Current Realized Losses                                                                                           0.00
Group 2 Current Realized Losses                                                                                           0.00
Group 3 Current Realized Losses                                                                                           0.00
Total Current Realized Losses                                                                                             0.00

Cumulative Realized Losses Incurred in Group 1                                                                            0.00
Cumulative Realized Losses Incurred in Group 2                                                                            0.00
Cumulative  Realized Losses Incurred in Group 3                                                                           0.00
Total Cumulative Realized Losses Incurred                                                                                 0.00

Sec. 4.06(xiv) Class M1 Unpaid Realized Loss Amount                                                                       0.00
Sec. 4.06(xiv) Class M1 Applied Realized Loss Amount                                                                      0.00

Sec. 4.06(xiv) Class M2 Unpaid Realized Loss Amount                                                                       0.00
Sec. 4.06(xiv) Class M2 Applied Realized Loss Amount                                                                      0.00

Sec. 4.06(xiv) Class B1 Unpaid Realized Loss Amount                                                                       0.00
Sec. 4.06(xiv) Class B1 Applied Realized Loss Amount                                                                      0.00

Sec. 4.06(xiv) Class B2 Unpaid Realized Loss Amount                                                                       0.00
Sec. 4.06(xiv) Class B2 Applied Realized Loss Amount                                                                      0.00

Sec. 4.06(xvi) Unpaid Interest
Class AF1 Unpaid Interest Shortfall                                                                                       0.00
Class AV1 Unpaid Interest Shortfall                                                                                       0.00
Class AV2 Unpaid Interest Shortfall                                                                                       0.00
Class AIO Unpaid Interest Shortfall                                                                                       0.00
Class M1 Unpaid Interest Shortfall                                                                                        0.00
Class M2 Unpaid Interest Shortfall                                                                                        0.00
Class B1  Unpaid Interest Shortfall                                                                                       0.00
Class B2  Unpaid Interest Shortfall                                                                                       0.00
Class N Unpaid Interest Shortfall                                                                                         0.00


Current Period Relief Act Interest Shortfalls                                                                           824.28

Class AF1 Interest Accrual Relief Act Reduction                                                                         209.31
Class AV1 Interest Accrual Relief Act Reduction                                                                          67.42
Class AV2 Interest Accrual Relief Act Reduction                                                                         180.73
Class AIO Interest Accrual Relief Act Reduction                                                                         220.72
Class M1  Interest Accrual Relief Act Reduction                                                                          33.63
Class M2 Interest Accrual Relief Act Reduction                                                                           46.13
Class B1  Interest Accrual Relief Act Reduction                                                                          42.72
Class B2  Interest Accrual Relief Act Reduction                                                                          23.62

Sec. 4.06(xvii) Net Prepayment Interest Shortfalls                                                                        0.00
Class AF1 Prepayment Interest Shortfall Reduction                                                                         0.00
Class AV1 Prepayment Interest Shortfall Reduction                                                                         0.00
Class AV2 Prepayment Interest Shortfall Reduction                                                                         0.00
Class AIO  Prepayment Interest Shortfall Reduction                                                                        0.00
Class M1   Prepayment Interest Shortfall Reduction                                                                        0.00
Class M2  Prepayment Interest Shortfall Reduction                                                                         0.00
Class B1   Prepayment Interest Shortfall Reduction                                                                        0.00
Class B2   Prepayment Interest Shortfall Reduction                                                                        0.00

Sec. 4.06(xix) Trustee Fee Paid                                                                                       1,867.58

Sec. 4.06(xxii)Net Rate Carryover Amount - Class AV1                                                                      0.00
Sec. 4.06(xxii)Unpaid Net Rate Carryover Amount - Class AV1                                                               0.00
Sec. 4.06(xxii)Net Rate Carryover Amount - Class AV2                                                                      0.00
Sec. 4.06(xxii)Unpaid Net Rate Carryover Amount - Class AV2                                                               0.00
Sec. 4.06(xxii)Net Rate Carryover Amount - Class M1                                                                       0.00
Sec. 4.06(xxii)Unpaid Net Rate Carryover Amount - Class M1                                                                0.00
Sec. 4.06(xxii)Net Rate Carryover Amount - Class M2                                                                       0.00
Sec. 4.06(xxii)Unpaid Net Rate Carryover Amount - Class M2                                                                0.00
Sec. 4.06(xxii)Net Rate Carryover Amount - Class B1                                                                       0.00
Sec. 4.06(xxii)Unpaid Net Rate Carryover Amount - Class B1                                                                0.00
Sec. 4.06(xxii)Net Rate Carryover Amount - Class B2                                                                       0.00
Sec. 4.06(xxii)Unpaid Net Rate Carryover Amount - Class B2                                                                0.00

Sec. 4.06(xxii) Has the Trigger Event Occured                                                                               NO


Sec. 4.06(xxii) Cumulative Realized Losses as a Percentage of Original Collateral Balance                             0.0000 %

Sec. 4.06(xxiii) Available Funds
Available Funds                                                                                                   8,131,466.17
Interest Remittance Amount                                                                                        2,325,793.13
Principal Remittance Amount                                                                                       5,805,673.04

Sec 4.06(xxvi) Repurchased Principal                                                                                      0.00


Class X Distributable Amount                                                                                              0.00

Class AIO Component 1 Beginning Balance                                                                          43,000,000.00
Class AIO Component 1 Interest Paid                                                                                  80,549.07
Class AIO Component 1 Ending Balance                                                                             40,000,000.00

Class AIO Component 2 Beginning Balance                                                                          16,000,000.00
Class AIO Component 2 Interest Paid                                                                                  29,971.75
Class AIO Component 2 Ending Balance                                                                             15,000,000.00

Class AIO Component 3 Beginning Balance                                                                          66,000,000.00
Class AIO Component 3 Interest Paid                                                                                 123,633.46
Class AIO Component 3 Ending Balance                                                                             62,000,000.00