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): June 25, 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 June 25, 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 June 25, 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: 6/28/2004 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 June 25, 2004 distribution. EX-99.1 Bear Stearns Asset Backed Securities Mortgage Pass-Through Certificates Record Date: 5/31/2004 Distribution Date: 6/25/2004 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 1.60000% 219,949,284.11 303,041.24 15,258,483.12 A-2 07384YGY6 SEN 1.85000% 28,751,646.95 45,802.97 1,994,580.35 A-IO 07384YGZ3 SEN 5.00000% 0.00 257,229.17 0.00 M-1 07384YHA7 MEZ 2.20000% 30,867,000.00 58,475.82 0.00 M-2 07384YHB5 MEZ 3.10000% 29,324,000.00 78,278.79 0.00 B 07384YHC3 SUB 3.35000% 23,151,000.00 66,784.20 0.00 B-IO BSA031BIO IO 0.00000% 0.00 1,083,320.96 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 342,229,176.52 1,892,933.15 17,253,063.47 Certificateholder Distribution Summary (continued) Current Ending Cumulative Realized Certificate Total Realized Class Loss Balance Distribution Losses <s> <c> <c> <c> <c> A-1 0.00 204,690,800.99 15,561,524.36 0.00 A-2 0.00 26,757,066.60 2,040,383.32 0.00 A-IO 0.00 0.00 257,229.17 0.00 M-1 0.00 30,867,000.00 58,475.82 0.00 M-2 0.00 29,324,000.00 78,278.79 0.00 B 0.00 23,151,000.00 66,784.20 0.00 B-IO 0.00 0.00 1,083,320.96 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 0.00 324,976,113.05 19,145,996.62 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-1 472,271,000.00 219,949,284.11 0.00 15,258,483.12 0.00 0.00 A-2 61,735,000.00 28,751,646.95 0.00 1,994,580.35 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 617,348,209.42 342,229,176.52 0.00 17,253,063.47 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 15,258,483.12 204,690,800.99 0.43341810 15,258,483.12 A-2 1,994,580.35 26,757,066.60 0.43341810 1,994,580.35 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 17,253,063.47 324,976,113.05 0.52640650 17,253,063.47 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-1 472,271,000.00 465.72684774 0.00000000 32.30874460 0.00000000 A-2 61,735,000.00 465.72684782 0.00000000 32.30874463 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 32.30874460 433.41810314 0.43341810 32.30874460 A-2 0.00000000 32.30874463 433.41810318 0.43341810 32.30874463 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 1.60000% 219,949,284.11 303,041.24 0.00 0.00 A-2 61,735,000.00 1.85000% 28,751,646.95 45,802.97 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 2.20000% 30,867,000.00 58,475.82 0.00 0.00 M-2 29,324,000.00 3.10000% 29,324,000.00 78,278.79 0.00 0.00 B 23,151,000.00 3.35000% 23,151,000.00 66,784.20 0.00 0.00 B-IO 0.00 0.00000% 342,229,176.51 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 617,348,209.42 809,612.19 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 0.00 303,041.24 0.00 204,690,800.99 A-2 0.00 0.00 45,802.97 0.00 26,757,066.60 A-IO 0.00 0.00 257,229.17 0.00 61,735,000.00 M-1 0.00 0.00 58,475.82 0.00 30,867,000.00 M-2 0.00 0.00 78,278.79 0.00 29,324,000.00 B 0.00 0.00 66,784.20 0.00 23,151,000.00 B-IO 0.00 0.00 1,083,320.96 0.00 324,976,113.04 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 1,892,933.15 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 1.60000% 465.72684774 0.64166811 0.00000000 0.00000000 A-2 61,735,000.00 1.85000% 465.72684782 0.74192873 0.00000000 0.00000000 A-IO 0.00 5.00000% 1000.00000000 4.16666672 0.00000000 0.00000000 M-1 30,867,000.00 2.20000% 1000.00000000 1.89444455 0.00000000 0.00000000 M-2 29,324,000.00 3.10000% 1000.00000000 2.66944448 0.00000000 0.00000000 B 23,151,000.00 3.35000% 1000.00000000 2.88472204 0.00000000 0.00000000 B-IO 0.00 0.00000% 554.35355815 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 0.64166811 0.00000000 433.41810314 A-2 0.00000000 0.00000000 0.74192873 0.00000000 433.41810318 A-IO 0.00000000 0.00000000 4.16666672 0.00000000 1000.00000000 M-1 0.00000000 0.00000000 1.89444455 0.00000000 1000.00000000 M-2 0.00000000 0.00000000 2.66944448 0.00000000 1000.00000000 B 0.00000000 0.00000000 2.88472204 0.00000000 1000.00000000 B-IO 0.00000000 0.00000000 1.75479728 0.00000000 526.40650460 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 19,696,416.15 Liquidations, Insurance Proceeds, Reserve Funds 0.00 Proceeds from Repurchased Loans 0.00 Other Amounts (Servicer Advances) 510,695.58 Realized Loss (Gains, Subsequent Expenses & Recoveries) (419,419.97) Prepayment Penalties 0.00 Total Deposits 19,787,691.76 Withdrawals Reimbursement for Servicer Advances 509,888.66 Payment of Service Fee 131,806.48 Payment of Interest and Principal 19,145,996.62 Total Withdrawals (Pool Distribution Amount) 19,787,691.76 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 130,380.51 Master Servicing Fee 1,425.97 Supported Prepayment/Curtailment Interest Shortfall 0.00 Net Servicing Fee 131,806.48 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 202 2 0 204 10,987,714.31 164,369.78 0.00 11,152,084.09 30 Days 239 27 4 0 270 17,278,257.59 1,697,008.63 262,101.25 0.00 19,237,367.47 60 Days 86 14 7 1 108 7,515,604.47 886,154.32 789,884.48 93,052.81 9,284,696.08 90 Days 35 10 30 0 75 2,755,734.61 540,476.27 2,018,017.11 0.00 5,314,227.99 120 Days 14 11 30 0 55 1,142,023.03 1,101,498.12 2,681,498.42 0.00 4,925,019.57 150 Days 6 14 19 1 40 336,519.48 1,093,568.02 2,112,155.44 59,930.91 3,602,173.85 180+ Days 15 73 78 30 196 1,518,259.18 6,050,098.91 7,314,286.90 1,832,844.84 16,715,489.83 Totals 395 351 170 32 948 30,546,398.36 22,356,518.58 15,342,313.38 1,985,828.56 70,231,058.88 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 4.233026% 0.041911% 0.000000% 4.274937% 3.369830% 0.050411% 0.000000% 3.420241% 30 Days 5.008382% 0.565801% 0.083822% 0.000000% 5.658005% 5.299082% 0.520457% 0.080384% 0.000000% 5.899923% 60 Days 1.802179% 0.293378% 0.146689% 0.020956% 2.263202% 2.304966% 0.271775% 0.242250% 0.028538% 2.847530% 90 Days 0.733445% 0.209556% 0.628667% 0.000000% 1.571668% 0.845158% 0.165759% 0.618907% 0.000000% 1.629825% 120 Days 0.293378% 0.230511% 0.628667% 0.000000% 1.152557% 0.350248% 0.337819% 0.822391% 0.000000% 1.510458% 150 Days 0.125733% 0.293378% 0.398156% 0.020956% 0.838223% 0.103207% 0.335387% 0.647779% 0.018380% 1.104753% 180+ Days 0.314334% 1.529757% 1.634535% 0.628667% 4.107293% 0.465636% 1.855509% 2.243224% 0.562117% 5.126486% Totals 8.277452% 7.355407% 3.562448% 0.670578% 19.865884% 9.368298% 6.856538% 4.705346% 0.609035% 21.539217% OTHER INFORMATION <s> <c> Current Period Class A Insufficient Funds 0.00 Principal Balance of Contaminated Properties 0.00 Periodic Advance 510,695.58 COLLATERAL STATEMENT Collateral Description Fixed & Mixed ARM Weighted Average Gross Coupon 8.565475% Weighted Average Net Coupon 8.108306% Weighted Average Pass-Through Rate 8.103306% Weighted Average Maturity(Stepdown Calculation ) 273 Beginning Scheduled Collateral Loan Count 4,931 Number Of Loans Paid In Full 159 Ending Scheduled Collateral Loan Count 4,772 Beginning Scheduled Collateral Balance 342,229,176.51 Ending Scheduled Collateral Balance 324,976,113.04 Ending Actual Collateral Balance at 31-May-2004 326,061,341.43 Monthly P &I Constant 3,225,366.52 Special Servicing Fee 0.00 Prepayment Penalties 0.00 Realized Loss Amount 419,419.97 Cumulative Realized Loss 2,095,292.75 Ending Scheduled Balance for Premium Loans 324,976,113.04 Scheduled Principal 782,570.41 Unscheduled Principal 16,470,493.06 Required Overcollateralization Amount 0.00 Overcollateralized Increase Amount 419,419.97 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 419,419.97 Excess Cash Amount 1,502,740.94 Miscellaneous Reporting Three month rolling average .132539 Trigger Event YES 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 9.000119 7.111107 8.565475 Weighted Average Net Rate 8.536507 6.675499 8.108306 Weighted Average Maturity 258 322 273 Beginning Loan Count 4,338 593 4,931 Loans Paid In Full 130 29 159 Ending Loan Count 4,208 564 4,772 Beginning Scheduled Balance 263,485,317.92 78,743,858.59 342,229,176.51 Ending scheduled Balance 251,350,811.95 73,625,301.09 324,976,113.04 Record Date 05/31/2004 05/31/2004 05/31/2004 Principal And Interest Constant 2,656,140.55 569,225.97 3,225,366.52 Scheduled Principal 679,974.46 102,595.95 782,570.41 Unscheduled Principal 11,454,531.51 5,015,961.55 16,470,493.06 Scheduled Interest 1,976,166.09 466,630.02 2,442,796.11 Servicing Fees 101,795.96 28,584.55 130,380.51 Master Servicing Fees 1,097.87 328.10 1,425.97 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 1,873,272.26 437,717.37 2,310,989.63 Realized Loss Amount 324,739.59 94,680.38 419,419.97 Cumulative Realized Loss 1,924,397.50 170,895.25 2,095,292.75 Percentage of Cumulative Losses 0.4050 0.1202 0.3394 Prepayment Penalties 0.00 0.00 0.00 Special Servicing Fee 0.00 0.00 0.00 Pass-Through Rate 8.531507 6.670499 8.103306