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): July 26, 2004 BEAR STEARNS ASSET BACKED SECURITIES TRUST Asset Backed Certificates, Series 2003-1 Trust (Exact name of registrant as specified in its charter) New York (governing law of 333-56242-16 52-2120451 Pooling and Servicing Agreement) (Commission 52-2120452 (State or other File Number) 52-2120453 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) ITEM 5. Other Events On July 26, 2004 a distribution was made to holders of BEAR STEARNS ASSET BACKED SECURITIES TRUST, Asset Backed Certificates, Series 2003-1 Trust. ITEM 7. Financial Statements and Exhibits (c) Exhibits furnished in accordance with Item 601(a) of Regulation S-K Exhibit Number Description EX-99.1 Monthly report distributed to holders of Asset Backed Certificates, Series 2003-1 Trust, relating to the July 26, 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 TRUST Asset Backed Certificates, Series 2003-1 Trust 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: 7/27/2004 INDEX TO EXHIBITS Exhibit Number Description EX-99.1 Monthly report distributed to holders of Asset Backed Certificates, Series 2003-1 Trust, relating to the July 26, 2004 distribution. EX-99.1 Bear Stearns Asset Backed Securities Asset-Backed Certificates Record Date: 6/30/2004 Distribution Date: 7/26/2004 BSA Series: 2003-1 Contact: Customer Service - CTSLink Wells Fargo Bank, N.A. Securities Administration Services 7485 New Horizon Way Frederick, MD 21703 Telephone: (301) 815-6600 Fax: (301) 815-6660 Certificateholder Distribution Summary Certificate Certificate Beginning Class Pass-Through Certificate Interest Principal Class CUSIP Description Rate Balance Distribution Distribution <s> <c> <c> <c> <c> <c> <c> A-1 07384YGX8 SEN 1.80000% 204,690,800.99 317,270.73 11,348,931.33 A-2 07384YGY6 SEN 2.05000% 26,757,066.60 47,233.65 1,483,525.93 A-IO 07384YGZ3 SEN 5.00000% 0.00 257,229.16 0.00 M-1 07384YHA7 MEZ 2.40000% 30,867,000.00 63,791.80 0.00 M-2 07384YHB5 MEZ 3.30000% 29,324,000.00 83,329.03 0.00 B 07384YHC3 SUB 3.55000% 23,151,000.00 70,771.32 0.00 B-IO BSA031BIO IO 0.00000% 0.00 984,073.04 0.00 R-1 07384YHD1 RES 0.00000% 0.00 0.00 0.00 R-2 07384YHE9 RES 0.00000% 0.00 0.00 0.00 R-3 07384YHF6 RES 0.00000% 0.00 0.00 0.00 OC BSA0301OC OC 0.00000% 10,186,245.46 0.00 0.00 Totals 324,976,113.05 1,823,698.73 12,832,457.26 Certificateholder Distribution Summary (continued) Current Ending Cumulative Realized Certificate Total Realized Class Loss Balance Distribution Losses <s> <c> <c> <c> <c> A-1 0.00 193,341,869.66 11,666,202.06 0.00 A-2 0.00 25,273,540.67 1,530,759.58 0.00 A-IO 0.00 0.00 257,229.16 0.00 M-1 0.00 30,867,000.00 63,791.80 0.00 M-2 0.00 29,324,000.00 83,329.03 0.00 B 0.00 23,151,000.00 70,771.32 0.00 B-IO 0.00 0.00 984,073.04 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 OC 0.00 10,186,245.46 0.00 0.00 Totals 0.00 312,143,655.79 14,656,155.99 0.00 <FN> All distributions required by the Pooling and Servicing Agreement have been calculated by the Certificate Administrator on behalf of the Trustee. </FN> Principal Distribution Statement Original Beginning Scheduled Unscheduled Face Certificate Principal Principal Realized Class Amount Balance Distribution Distribution Accretion Loss (1) <s> <c> <c> <c> <c> <c> <c> A-1 472,271,000.00 204,690,800.99 0.00 11,348,931.33 0.00 0.00 A-2 61,735,000.00 26,757,066.60 0.00 1,483,525.93 0.00 0.00 A-IO 0.00 0.00 0.00 0.00 0.00 0.00 M-1 30,867,000.00 30,867,000.00 0.00 0.00 0.00 0.00 M-2 29,324,000.00 29,324,000.00 0.00 0.00 0.00 0.00 B 23,151,000.00 23,151,000.00 0.00 0.00 0.00 0.00 B-IO 0.00 0.00 0.00 0.00 0.00 0.00 R-1 50.00 0.00 0.00 0.00 0.00 0.00 R-2 50.00 0.00 0.00 0.00 0.00 0.00 R-3 50.00 0.00 0.00 0.00 0.00 0.00 OC 59.42 10,186,245.46 0.00 0.00 0.00 0.00 Totals 617,348,209.42 324,976,113.05 0.00 12,832,457.26 0.00 0.00 <FN> (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. </FN> Principal Distribution Statement (continued) Total Ending Ending Total Principal Certificate Certificate Principal Class Reduction Balance Percentage Distribution <s> <c> <c> <c> <c> A-1 11,348,931.33 193,341,869.66 0.40938755 11,348,931.33 A-2 1,483,525.93 25,273,540.67 0.40938755 1,483,525.93 A-IO 0.00 0.00 0.00000000 0.00 M-1 0.00 30,867,000.00 1.00000000 0.00 M-2 0.00 29,324,000.00 1.00000000 0.00 B 0.00 23,151,000.00 1.00000000 0.00 B-IO 0.00 0.00 0.00000000 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 OC 0.00 10,186,245.46 171,427.89397509 0.00 Totals 12,832,457.26 312,143,655.79 0.50562009 12,832,457.26 Principal Distribution Factors Statement Original Beginning Scheduled Unscheduled Face Certificate Principal Principal Class (2) Amount Balance Distribution Distribution Accretion <s> <c> <c> <c> <c> <c> A-1 472,271,000.00 433.41810314 0.00000000 24.03054884 0.00000000 A-2 61,735,000.00 433.41810318 0.00000000 24.03054880 0.00000000 A-IO 0.00 0.00000000 0.00000000 0.00000000 0.00000000 M-1 30,867,000.00 1000.00000000 0.00000000 0.00000000 0.00000000 M-2 29,324,000.00 1000.00000000 0.00000000 0.00000000 0.00000000 B 23,151,000.00 1000.00000000 0.00000000 0.00000000 0.00000000 B-IO 0.00 0.00000000 0.00000000 0.00000000 0.00000000 R-1 50.00 0.00000000 0.00000000 0.00000000 0.00000000 R-2 50.00 0.00000000 0.00000000 0.00000000 0.00000000 R-3 50.00 0.00000000 0.00000000 0.00000000 0.00000000 OC 59.42 171427893.97509300 0.00000000 0.00000000 0.00000000 <FN> </FN> Principal Distribution Factors Statement (continued) Total Ending Ending Total Realized Principal Certificate Certificate Principal Class Loss (3) Reduction Balance Percentage Distribution <s> <c> <c> <c> <c> <c> A-1 0.00000000 24.03054884 409.38755431 0.40938755 24.03054884 A-2 0.00000000 24.03054880 409.38755439 0.40938755 24.03054880 A-IO 0.00000000 0.00000000 0.00000000 0.00000000 0.00000000 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 B 0.00000000 0.00000000 1,000.00000000 1.00000000 0.00000000 B-IO 0.00000000 0.00000000 0.00000000 0.00000000 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 OC 0.00000000 0.00000000 171,427,893.97509300 171427.89397509 0.00000000 <FN> (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. </FN> 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 <s> <c> <c> <c> <c> <c> <c> A-1 472,271,000.00 1.80000% 204,690,800.99 317,270.74 0.00 0.00 A-2 61,735,000.00 2.05000% 26,757,066.60 47,233.66 0.00 0.00 A-IO 0.00 5.00000% 61,735,000.00 257,229.17 0.00 0.00 M-1 30,867,000.00 2.40000% 30,867,000.00 63,791.80 0.00 0.00 M-2 29,324,000.00 3.30000% 29,324,000.00 83,329.03 0.00 0.00 B 23,151,000.00 3.55000% 23,151,000.00 70,771.32 0.00 0.00 B-IO 0.00 0.00000% 324,976,113.04 0.00 0.00 0.00 R-1 50.00 0.00000% 0.00 0.00 0.00 0.00 R-2 50.00 0.00000% 0.00 0.00 0.00 0.00 R-3 50.00 0.00000% 0.00 0.00 0.00 0.00 OC 59.42 0.00000% 10,186,245.46 0.00 0.00 0.00 Totals 617,348,209.42 839,625.72 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 <s> <c> <c> <c> <c> <c> A-1 0.00 0.00 317,270.73 0.00 193,341,869.66 A-2 0.00 0.00 47,233.65 0.00 25,273,540.67 A-IO 0.00 0.00 257,229.16 0.00 61,735,000.00 M-1 0.00 0.00 63,791.80 0.00 30,867,000.00 M-2 0.00 0.00 83,329.03 0.00 29,324,000.00 B 0.00 0.00 70,771.32 0.00 23,151,000.00 B-IO 0.00 0.00 984,073.04 0.00 312,143,655.78 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 OC 0.00 0.00 0.00 0.00 10,186,245.46 Totals 0.00 0.00 1,823,698.73 0.00 <FN> (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. </FN> 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 <s> <c> <c> <c> <c> <c> <c> A-1 472,271,000.00 1.80000% 433.41810314 0.67179806 0.00000000 0.00000000 A-2 61,735,000.00 2.05000% 433.41810318 0.76510343 0.00000000 0.00000000 A-IO 0.00 5.00000% 1000.00000000 4.16666672 0.00000000 0.00000000 M-1 30,867,000.00 2.40000% 1000.00000000 2.06666667 0.00000000 0.00000000 M-2 29,324,000.00 3.30000% 1000.00000000 2.84166655 0.00000000 0.00000000 B 23,151,000.00 3.55000% 1000.00000000 3.05694441 0.00000000 0.00000000 B-IO 0.00 0.00000% 526.40650460 0.00000000 0.00000000 0.00000000 R-1 50.00 0.00000% 0.00000000 0.00000000 0.00000000 0.00000000 R-2 50.00 0.00000% 0.00000000 0.00000000 0.00000000 0.00000000 R-3 50.00 0.00000% 0.00000000 0.00000000 0.00000000 0.00000000 OC 59.42 0.00000% 171427893.97509300 0.00000000 0.00000000 0.00000000 <FN> (5) Per $1 denomination. </FN> Interest Distribution Factors Statement (continued) Remaining Ending Non-Supported Total Unpaid Certificate/ Interest Realized Interest Interest Notional Class Shortfall Losses (6) Distribution Shortfall Balance <s> <c> <c> <c> <c> <c> A-1 0.00000000 0.00000000 0.67179804 0.00000000 409.38755431 A-2 0.00000000 0.00000000 0.76510326 0.00000000 409.38755439 A-IO 0.00000000 0.00000000 4.16666656 0.00000000 1000.00000000 M-1 0.00000000 0.00000000 2.06666667 0.00000000 1000.00000000 M-2 0.00000000 0.00000000 2.84166655 0.00000000 1000.00000000 B 0.00000000 0.00000000 3.05694441 0.00000000 1000.00000000 B-IO 0.00000000 0.00000000 1.59403239 0.00000000 505.62008769 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 OC 0.00000000 0.00000000 0.00000000 0.00000000 171427893.97509300 <FN> (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. </FN> CERTIFICATEHOLDER ACCOUNT STATEMENT CERTIFICATE ACCOUNT <s> <c> Beginning Balance 0.00 Deposits Payments of Interest and Principal 15,154,298.46 Liquidations, Insurance Proceeds, Reserve Funds 0.00 Proceeds from Repurchased Loans 0.00 Other Amounts (Servicer Advances) 512,534.25 Realized Loss (Gains, Subsequent Expenses & Recoveries) (374,598.57) Prepayment Penalties 0.00 Total Deposits 15,292,234.14 Withdrawals Reimbursement for Servicer Advances 510,695.58 Payment of Service Fee 125,382.57 Payment of Interest and Principal 14,656,155.99 Total Withdrawals (Pool Distribution Amount) 15,292,234.14 Ending Balance 0.00 PREPAYMENT/CURTAILMENT INTEREST SHORTFALL <s> <c> Total Prepayment/Curtailment Interest Shortfall 0.00 Servicing Fee Support 0.00 Non-Supported Prepayment/Curtailment Interest Shortfall 0.00 SERVICING FEES <s> <c> Gross Servicing Fee 124,028.49 Master Servicing Fee 1,354.08 Supported Prepayment/Curtailment Interest Shortfall 0.00 Net Servicing Fee 125,382.57 OTHER ACCOUNTS Beginning Current Current Ending Account Type Balance Withdrawals Deposits Balance <s> <c> <c> <c> <c> Financial Guaranty 0.00 0.00 0.00 0.00 Reserve Fund 0.00 0.00 0.00 0.00 LOAN STATUS STRATIFICATION/CREDIT ENHANCEMENT STATEMENT DELINQUENCY STATUS DELINQUENT BANKRUPTCY FORECLOSURE REO Total <s> <c> <c> <c> <c> <c> 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 196 0 0 196 10,238,487.63 0.00 0.00 10,238,487.63 30 Days 246 22 4 0 272 15,319,323.25 1,261,174.87 49,160.06 0.00 16,629,658.18 60 Days 95 19 10 0 124 9,024,206.44 1,345,613.50 1,158,511.07 0.00 11,528,331.01 90 Days 22 9 34 0 65 1,443,904.30 486,159.96 4,024,039.12 0.00 5,954,103.38 120 Days 18 9 32 0 59 1,250,112.84 687,909.60 1,974,908.67 0.00 3,912,931.11 150 Days 5 15 20 0 40 524,568.37 1,609,966.75 2,402,204.63 0.00 4,536,739.75 180+ Days 12 75 84 24 195 1,466,509.96 6,410,796.00 7,165,433.85 1,739,915.16 16,782,654.97 Totals 398 345 184 24 951 29,028,625.16 22,040,108.31 16,774,257.40 1,739,915.16 69,582,906.03 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 4.231434% 0.000000% 0.000000% 4.231434% 3.268682% 0.000000% 0.000000% 3.268682% 30 Days 5.310881% 0.474957% 0.086356% 0.000000% 5.872193% 4.890761% 0.402636% 0.015695% 0.000000% 5.309091% 60 Days 2.050950% 0.410190% 0.215889% 0.000000% 2.677029% 2.881017% 0.429593% 0.369860% 0.000000% 3.680470% 90 Days 0.474957% 0.194301% 0.734024% 0.000000% 1.403282% 0.460973% 0.155209% 1.284692% 0.000000% 1.900873% 120 Days 0.388601% 0.194301% 0.690846% 0.000000% 1.273748% 0.399104% 0.219618% 0.630498% 0.000000% 1.249220% 150 Days 0.107945% 0.323834% 0.431779% 0.000000% 0.863558% 0.167471% 0.513989% 0.766914% 0.000000% 1.448374% 180+ Days 0.259067% 1.619171% 1.813472% 0.518135% 4.209845% 0.468190% 2.046675% 2.287596% 0.555475% 5.357936% Totals 8.592401% 7.448187% 3.972366% 0.518135% 20.531088% 9.267515% 7.036401% 5.355255% 0.555475% 22.214646% OTHER INFORMATION <s> <c> Current Period Class A Insufficient Funds 0.00 Principal Balance of Contaminated Properties 0.00 Periodic Advance 512,534.25 COLLATERAL STATEMENT Collateral Description Fixed & Mixed ARM Weighted Average Gross Coupon 8.576909% Weighted Average Net Coupon 8.118924% Weighted Average Pass-Through Rate 8.113924% Weighted Average Maturity(Stepdown Calculation ) 272 Beginning Scheduled Collateral Loan Count 4,772 Number Of Loans Paid In Full 140 Ending Scheduled Collateral Loan Count 4,632 Beginning Scheduled Collateral Balance 324,976,113.04 Ending Scheduled Collateral Balance 312,143,655.78 Ending Actual Collateral Balance at 30-Jun-2004 313,229,868.72 Monthly P &I Constant 3,085,052.13 Special Servicing Fee 0.00 Prepayment Penalties 0.00 Realized Loss Amount 374,598.57 Cumulative Realized Loss 2,469,891.32 Ending Scheduled Balance for Premium Loans 312,143,655.78 Scheduled Principal 762,310.14 Unscheduled Principal 12,070,147.12 Required Overcollateralization Amount 0.00 Overcollateralized Increase Amount 363,987.67 Overcollateralized reduction Amount 0.00 Specified O/C Amount 10,186,245.46 Overcollateralized Amount 10,186,245.46 Overcollateralized Deficiency Amount 0.00 Base Overcollateralized Amount 0.00 Extra principal distribution Amount 363,987.67 Excess Cash Amount 1,358,671.59 Miscellaneous Reporting Three month rolling average 14.0524% Trigger Event NO Yield maintenance amount 0.00 Group Level Collateral Statement Group FIXED loans ARM loans Total Collateral Description Mixed Fixed Mixed ARM Fixed & Mixed ARM Weighted Average Coupon Rate 9.016656 7.075647 8.576909 Weighted Average Net Rate 8.552983 6.637078 8.118924 Weighted Average Maturity 257 321 272 Beginning Loan Count 4,208 564 4,772 Loans Paid In Full 123 17 140 Ending Loan Count 4,085 547 4,632 Beginning Scheduled Balance 251,350,811.95 73,625,301.09 324,976,113.04 Ending scheduled Balance 241,900,693.75 70,242,962.03 312,143,655.78 Record Date 06/30/2004 06/30/2004 06/30/2004 Principal And Interest Constant 2,552,646.26 532,405.87 3,085,052.13 Scheduled Principal 664,026.47 98,283.67 762,310.14 Unscheduled Principal 8,786,091.73 3,284,055.39 12,070,147.12 Scheduled Interest 1,888,619.79 434,122.20 2,322,741.99 Servicing Fees 97,120.35 26,908.14 124,028.49 Master Servicing Fees 1,047.30 306.78 1,354.08 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 0.00 0.00 0.00 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 1,790,452.14 406,907.28 2,197,359.42 Realized Loss Amount 355,424.80 19,173.77 374,598.57 Cumulative Realized Loss 2,279,822.30 190,069.02 2,469,891.32 Percentage of Cumulative Losses 0.4798 0.1337 0.4001 Prepayment Penalties 0.00 0.00 0.00 Special Servicing Fee 0.00 0.00 0.00 Pass-Through Rate 8.547983 6.632078 8.113924