8-K 1 wfm0300b.txt DECEMBER 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): December 26, 2003 WELLS FARGO ASSET SECURITIES CORPORATION Mortgage Pass-Through Certificates, Series 2003-B Trust (Exact name of registrant as specified in its charter) New York (governing law of 333-98129-12 02-0686992 Pooling and Servicing Agreement) (Commission 02-0687019 (State or other File Number) IRS EIN jurisdiction of Incorporation) c/o Wells Fargo Bank Minnesota, 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 December 26, 2003 a distribution was made to holders of WELLS FARGO ASSET SECURITIES CORPORATION, Mortgage Pass-Through Certificates, Series 2003-B 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 Mortgage Pass-Through Certificates, Series 2003-B Trust, relating to the December 26, 2003 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. WELLS FARGO ASSET SECURITIES CORPORATION Mortgage Pass-Through Certificates, Series 2003-B Trust By: Wells Fargo Bank Minnesota, N.A. as Master Servicer By: /s/ Beth Belfield as Assistant Vice President By: Beth Belfield as Assistant Vice President Date: 1/2/04 INDEX TO EXHIBITS Exhibit Number Description EX-99.1 Monthly report distributed to holders of Mortgage Pass-Through Certificates, Series 2003-B Trust, relating to the December 26, 2003 distribution. EX-99.1

Wells Fargo Asset Securities Corporation Mortgage Pass-Through Certificates Record Date: 911/30/03 Distribution Date: 1012/2726/03 WFMBS Series: 2003-B Contact: Customer Service - CTSLink Wells Fargo Bank Minnesota, 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 94980UAA8 SEQ 4.15000% ~~103~~87,~~397~~384,~~130~~801.6644 ~~357~~302,~~581~~199.7466 92,~~157~~606,~~115~~259.2099 A-2 94980UAB6 SEQ 4.75000% 9177,~~966~~724,~~577~~411.8664 ~~364~~307,~~034~~652.3790 82,~~144~~318,~~796~~137.1295 A-3 94980UAC4 SEQ 0.~~78380~~77064% 0.00 ~~127~~106,~~605~~030.3375 0.00 A-R 94980UAE0 SEQ 5.~~20604~~20029% 0.00 0.00 0.00 ALR 94980UAD2 SEQ 5.~~20604~~20029% 0.00 0.00 0.00 B-1 94980UAF7 SUB 5.~~21625~~20309% 4,~~699~~691,~~499~~671.1362 20,~~428~~342.1323 34,~~867~~182.1193 B-2 94980UAG5 SUB 5.~~21625~~20309% 2,~~263~~259,~~237~~467.4176 9,~~838~~796.0164 12,~~862~~014.3646 B-3 94980UAH3 SUB 5.~~21625~~20309% 1,~~044~~042,~~112~~373.1609 4,~~538~~519.6254 ~~859~~929.1834 B-4 94980UAJ9 SUB 5.~~21625~~20309% ~~696~~694,~~074~~915.7839 3,~~025~~013.7503 ~~572~~619.7856 B-5 94980UAK6 SUB 5.~~21625~~20309% ~~522~~521,~~056~~186.0854 2,~~269~~259.3177 ~~429~~464.5967 B-6 94980UAL4 SUB 5.~~21625~~20309% ~~697~~696,~~195~~034.7853 3,~~030~~017.6288 ~~573~~620.7156 Totals ~~205~~175,~~285~~014,~~883~~862.8601 ~~892~~758,~~351~~832.8840 174,~~310~~933,~~076~~229.0546

Certificateholder Distribution Summary (continued) Current Ending Cumulative Realized Certificate Total Realized Class Loss Balance Distribution Losses A-1 0.00 9484,~~240~~778,~~015~~541.4546 92,~~514~~908,~~696~~459.9465 0.00 A-2 0.00 8375,~~821~~406,~~781~~273.7570 82,~~508~~625,~~830~~790.4985 0.00 A-3 0.00 0.00 ~~127~~106,~~605~~030.3375 0.00 A-R 0.00 0.00 0.00 0.00 ALR 0.00 0.00 0.00 0.00 B-1 0.00 4,~~695~~687,~~632~~488.0269 24,~~295~~525.2416 0.00 B-2 0.00 2,~~261~~257,~~375~~453.0529 11,~~700~~811.3710 0.00 B-3 0.00 1,~~043~~041,~~252~~443.9974 5,~~397~~448.8088 0.00 B-4 0.00 ~~695~~694,~~501~~295.9983 3,~~598~~632.5359 0.00 B-5 0.00 ~~521~~520,~~626~~721.4987 2,~~698~~724.9044 0.00 B-6 0.00 ~~696~~695,~~622~~413.0897 3,~~604~~638.3344 0.00 Totals 0.00 ~~187~~170,~~975~~081,~~807~~632.8255 185,~~202~~692,~~427~~061.9386 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-1 180,000,000.00 ~~103~~87,~~397~~384,~~130~~801.6644 8577,~~083~~909.0428 92,~~072~~528,~~032~~350.1671 0.00 0.00 A-2 160,101,000.00 9177,~~966~~724,~~577~~411.8664 7569,~~677~~296.1141 82,~~069~~248,~~119~~841.0053 0.00 0.00 A-3 0.00 0.00 0.00 0.00 0.00 0.00 A-R 50.00 0.00 0.00 0.00 0.00 0.00 ALR 50.00 0.00 0.00 0.00 0.00 0.00 B-1 4,726,000.00 4,~~699~~691,~~499~~671.1362 34,~~867~~182.1193 0.00 0.00 0.00 B-2 2,276,000.00 2,~~263~~259,~~237~~467.4176 12,~~862~~014.3646 0.00 0.00 0.00 B-3 1,050,000.00 1,~~044~~042,~~112~~373.1609 ~~859~~929.1834 0.00 0.00 0.00 B-4 700,000.00 ~~696~~694,~~074~~915.7839 ~~572~~619.7856 0.00 0.00 0.00 B-5 525,000.00 ~~522~~521,~~056~~186.0854 ~~429~~464.5967 0.00 0.00 0.00 B-6 701,127.33 ~~697~~696,~~195~~034.7853 ~~573~~620.7156 0.00 0.00 0.00 Totals 350,079,227.33 ~~205~~175,~~285~~014,~~883~~862.8601 ~~168~~156,~~924~~037.8821 174,~~141~~777,~~151~~192.1624 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 92,~~157~~606,~~115~~259.2099 9484,~~240~~778,~~015~~541.4546 0.~~52355564~~47099190 92,~~157~~606,~~115~~259.2099 A-2 82,~~144~~318,~~796~~137.1295 8375,~~821~~406,~~781~~273.7570 0.~~52355564~~47099190 82,~~144~~318,~~796~~137.1295 A-3 0.00 0.00 0.00000000 0.00 A-R 0.00 0.00 0.00000000 0.00 ALR 0.00 0.00 0.00000000 0.00 B-1 34,~~867~~182.1193 4,~~695~~687,~~632~~488.0269 0.~~99357427~~99185118 34,~~867~~182.1193 B-2 12,~~862~~014.3646 2,~~261~~257,~~375~~453.0529 0.~~99357428~~99185118 12,~~862~~014.3646 B-3 ~~859~~929.1834 1,~~043~~041,~~252~~443.9974 0.~~99357428~~99185118 ~~859~~929.1834 B-4 ~~572~~619.7856 ~~695~~694,~~501~~295.9983 0.~~99357427~~99185119 ~~572~~619.7856 B-5 ~~429~~464.5967 ~~521~~520,~~626~~721.4987 0.~~99357427~~99185118 ~~429~~464.5967 B-6 ~~573~~620.7156 ~~696~~695,~~622~~413.0897 0.~~99357428~~99185118 ~~573~~620.7156 Totals 174,~~310~~933,~~076~~229.0546 ~~187~~170,~~975~~081,~~807~~632.8255 0.~~53695219~~48583755 174,~~310~~933,~~076~~229.0546

Principal Distribution Factors Statement Original Beginning Scheduled Unscheduled Face Certificate Principal Principal Class (2) Amount Balance Distribution Distribution Accretion A-1 180,000,000.00 ~~574~~485.~~42850367~~47111911 0.~~47268356~~43282933 5014.~~40017867~~04639283 0.00000000 A-2 160,101,000.00 ~~574~~485.~~42850363~~47111911 0.~~47268356~~43282934 5014.~~40017864~~04639278 0.00000000 A-3 0.00 0.00000000 0.00000000 0.00000000 0.00000000 A-R 50.00 0.00000000 0.00000000 0.00000000 0.00000000 ALR 50.00 0.00000000 0.00000000 0.00000000 0.00000000 B-1 4,726,000.00 ~~994~~992.~~39253703~~73627169 0.~~81826280~~88508887 0.00000000 0.00000000 B-2 2,276,000.00 ~~994~~992.~~39253515~~73627417 0.~~81826011~~88508787 0.00000000 0.00000000 B-3 1,050,000.00 ~~994~~992.~~39253333~~73627619 0.~~81826667~~88508571 0.00000000 0.00000000 B-4 700,000.00 ~~994~~992.~~39254286~~73627143 0.~~81825714~~88508571 0.00000000 0.00000000 B-5 525,000.00 ~~994~~992.~~39253333~~73626667 0.~~81826667~~88508571 0.00000000 0.00000000 B-6 701,127.33 ~~994~~992.~~39253067~~73626946 0.~~81826792~~88508888 0.00000000 0.00000000 (2) Per $1000 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 5014.~~87286222~~47922217 ~~523~~470.~~55564139~~99189700 0.~~52355564~~47099190 5014.~~87286222~~47922217 A-2 0.00000000 5014.~~87286226~~47922218 ~~523~~470.~~55564144~~99189699 0.~~52355564~~47099190 5014.~~87286226~~47922218 A-3 0.00000000 0.00000000 0.00000000 0.00000000 0.00000000 A-R 0.00000000 0.00000000 0.00000000 0.00000000 0.00000000 ALR 0.00000000 0.00000000 0.00000000 0.00000000 0.00000000 B-1 0.00000000 0.~~81826280~~88508887 ~~993~~991.~~57427423~~85118282 0.~~99357427~~99185118 0.~~81826280~~88508887 B-2 0.00000000 0.~~81826011~~88508787 ~~993~~991.~~57427504~~85118190 0.~~99357428~~99185118 0.~~81826011~~88508787 B-3 0.00000000 0.~~81826667~~88508571 ~~993~~991.~~57427619~~85118095 0.~~99357428~~99185118 0.~~81826667~~88508571 B-4 0.00000000 0.~~81825714~~88508571 ~~993~~991.~~57427143~~85118571 0.~~99357427~~99185119 0.~~81825714~~88508571 B-5 0.00000000 0.~~81826667~~88508571 ~~993~~991.~~57426667~~85118095 0.~~99357427~~99185118 0.~~81826667~~88508571 B-6 0.00000000 0.~~81826792~~88508888 ~~993~~991.~~57427701~~85118058 0.~~99357428~~99185118 0.~~81826792~~88508888 (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-1 180,000,000.00 4.15000% ~~103~~87,~~397~~384,~~130~~801.6644 ~~357~~302,~~581~~205.7477 0.00 0.00 A-2 160,101,000.00 4.75000% 9177,~~966~~724,~~577~~411.8664 ~~364~~307,~~034~~659.3713 0.00 0.00 A-3 0.00 0.~~78380~~77064% ~~195~~165,~~363~~109,~~708~~213.5209 ~~127~~106,~~605~~032.3390 0.00 0.00 A-R 50.00 5.~~20604~~20029% 0.00 0.00 0.00 0.00 ALR 50.00 5.~~20604~~20029% 0.00 0.00 0.00 0.00 B-1 4,726,000.00 5.~~21625~~20309% 4,~~699~~691,~~499~~671.1362 20,~~428~~342.1364 0.00 0.00 B-2 2,276,000.00 5.~~21625~~20309% 2,~~263~~259,~~237~~467.4176 9,~~838~~796.0184 0.00 0.00 B-3 1,050,000.00 5.~~21625~~20309% 1,~~044~~042,~~112~~373.1609 4,~~538~~519.6263 0.00 0.00 B-4 700,000.00 5.~~21625~~20309% ~~696~~694,~~074~~915.7839 3,~~025~~013.7509 0.00 0.00 B-5 525,000.00 5.~~21625~~20309% ~~522~~521,~~056~~186.0854 2,~~269~~259.3182 0.00 0.00 B-6 701,127.33 5.~~21625~~20309% ~~697~~696,~~195~~034.7853 3,~~030~~017.6294 0.00 0.00 Totals 350,079,227.33 ~~892~~758,~~351~~847.8876 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 06.0012 0.00 ~~357~~302,~~581~~199.7466 0.00 9484,~~240~~778,~~015~~541.4546 A-2 06.0023 0.00 ~~364~~307,~~034~~652.3790 0.00 8375,~~821~~406,~~781~~273.7570 A-3 02.0015 0.00 ~~127~~106,~~605~~030.3375 0.00 ~~178~~160,~~061~~184,~~797~~815.2015 A-R 0.00 0.00 0.00 0.00 0.00 ALR 0.00 0.00 0.00 0.00 0.00 B-1 0.0041 0.00 20,~~428~~342.1323 0.00 4,~~695~~687,~~632~~488.0269 B-2 0.0020 0.00 9,~~838~~796.0164 0.00 2,~~261~~257,~~375~~453.0529 B-3 0.0009 0.00 4,~~538~~519.6254 0.00 1,~~043~~041,~~252~~443.9974 B-4 0.0006 0.00 3,~~025~~013.7503 0.00 ~~695~~694,~~501~~295.9983 B-5 0.0005 0.00 2,~~269~~259.3177 0.00 ~~521~~520,~~626~~721.4987 B-6 0.0006 0.00 3,~~030~~017.6288 0.00 ~~696~~695,~~622~~413.0897 Totals 015.0037 0.00 ~~892~~758,~~351~~832.8840 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-1 180,000,000.00 4.15000% ~~574~~485.~~42850367~~47111911 1.~~98656522~~67892094 0.00000000 0.00000000 A-2 160,101,000.00 4.75000% ~~574~~485.~~42850363~~47111911 21.~~27377949~~92165652 0.00000000 0.00000000 A-3 0.00 0.~~78380~~77064% ~~574~~485.~~42850365~~47111914 0.~~37519834~~31176886 0.00000000 0.00000000 A-R 50.00 5.~~20604~~20029% 0.00000000 0.00000000 0.00000000 0.00000000 ALR 50.00 5.~~20604~~20029% 0.00000000 0.00000000 0.00000000 0.00000000 B-1 4,726,000.00 5.~~21625~~20309% ~~994~~992.~~39253703~~73627169 4.~~32249894~~30440965 0.00000000 0.00000000 B-2 2,276,000.00 5.~~21625~~20309% ~~994~~992.~~39253515~~73627417 4.~~32250000~~30441125 0.00000000 0.00000000 B-3 1,050,000.00 5.~~21625~~20309% ~~994~~992.~~39253333~~73627619 4.~~32249524~~30440952 0.00000000 0.00000000 B-4 700,000.00 5.~~21625~~20309% ~~994~~992.~~39254286~~73627143 4.~~32250000~~30441429 0.00000000 0.00000000 B-5 525,000.00 5.~~21625~~20309% ~~994~~992.~~39253333~~73626667 4.~~32249524~~30441905 0.00000000 0.00000000 B-6 701,127.33 5.~~21625~~20309% ~~994~~992.~~39253067~~73626946 4.~~32249589~~30441073 0.00000000 0.00000000 (5) All classes are per $1000 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~~00003400 0.00000000 1.~~98656522~~67888700 0.00000000 ~~523~~470.~~55564139~~99189700 A-2 0.~~00000000~~00003891 0.00000000 21.~~27377949~~92161760 0.00000000 ~~523~~470.~~55564144~~99189699 A-3 0.~~00000000~~00000632 0.00000000 0.~~37519834~~31176254 0.00000000 ~~523~~470.~~55564141~~99189697 A-R 0.00000000 0.00000000 0.00000000 0.00000000 0.00000000 ALR 0.00000000 0.00000000 0.00000000 0.00000000 0.00000000 B-1 0.~~00000000~~00008675 0.00000000 4.~~32249894~~30432289 0.00000000 ~~993~~991.~~57427423~~85118282 B-2 0.~~00000000~~00008787 0.00000000 4.~~32250000~~30432337 0.00000000 ~~993~~991.~~57427504~~85118190 B-3 0.~~00000000~~00008571 0.00000000 4.~~32249524~~30432381 0.00000000 ~~993~~991.~~57427619~~85118095 B-4 0.~~00000000~~00008571 0.00000000 4.~~32250000~~30432857 0.00000000 ~~993~~991.~~57427143~~85118571 B-5 0.~~00000000~~00009524 0.00000000 4.~~32249524~~30432381 0.00000000 ~~993~~991.~~57426667~~85118095 B-6 0.~~00000000~~00008558 0.00000000 4.~~32249589~~30432515 0.00000000 ~~993~~991.~~57427701~~85118058 (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 185,~~259~~827,~~841~~990.4267 Liquidations, Insurance Proceeds, Reserve Funds 0.00 Proceeds from Repurchased Loans 0.00 Other Amounts (Servicer Advances) 1918,~~792~~383.1265 Realized Loss (Gains, Subsequent Expenses & Recoveries) 0.00 Prepayment Penalties 0.00 Total Deposits 185,~~279~~846,~~633~~374.5432 Withdrawals Reimbursement for Servicer Advances 2699,~~722~~562.7803 Payment of Service Fee 5054,~~482~~750.8343 Payment of Interest and Principal 185,~~202~~692,~~427~~061.9386 Total Withdrawals (Pool Distribution Amount) 185,~~279~~846,~~633~~374.5432 Ending Balance 0.00

PREPAYMENT/CURTAILMENT INTEREST SHORTFALL Total Prepayment/Curtailment Interest Shortfall 151,~~378~~413.9365 Servicing Fee Support 151,~~378~~398.9328 Non-Supported Prepayment/Curtailment Interest Shortfall 015.0037

SERVICING FEES Gross Servicing Fee 6454,~~151~~690.0631 Master Servicing Fee 1,~~710~~458.7041 Supported Prepayment/Curtailment Interest Shortfall 151,~~378~~398.9328 Net Servicing Fee 5054,~~482~~750.8343

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 0 0 0 0 0.00 0.00 0.00 0.00 30 Days 01 0 0 0 01 0798,971.0029 0.00 0.00 0.00 0798,971.0029 60 Days 10 0 0 0 10 ~~570,636~~0.00 0.00 0.00 0.00 ~~570,636~~0.00 90 Days 0 0 0 0 0 0.00 0.00 0.00 0.00 0.00 120 Days 0 01 0 0 01 0.00 0570,636.00 0.00 0.00 0570,636.00 150 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 1 01 0 0 12 798,971.29 570,636.00 0.00 0.00 ~~0.00 570~~1,~~636~~369,607.0029 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 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 30 Days 0.~~000000~~259740% 0.000000% 0.000000% 0.000000% 0.~~000000~~259740% 0.~~000000~~458605% 0.000000% 0.000000% 0.000000% 0.~~000000~~458605% 60 Days 0.~~236407~~000000% 0.000000% 0.000000% 0.000000% 0.~~236407~~000000% 0.~~337560~~000000% 0.000000% 0.000000% 0.000000% 0.~~337560~~000000% 90 Days 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 120 Days 0.000000% 0.~~000000~~259740% 0.000000% 0.000000% 0.~~000000~~259740% 0.000000% 0.~~000000~~327542% 0.000000% 0.000000% 0.~~000000~~327542% 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 0.~~236407~~259740% 0.~~000000~~259740% 0.000000% 0.000000% 0.~~236407~~519481% 0.~~337560~~458605% 0.~~000000~~327542% 0.000000% 0.000000% 0.~~337560~~786147%

OTHER INFORMATION Current Period Class A Insufficient Funds 0.00 Principal Balance of Contaminated Properties 0.00 Periodic Advance 5843,~~929~~418.2029

SUBORDINATION LEVEL/CLASS PERCENTAGE AND PREPAYMENT PERCENTAGE Current Original $ Original % Current $ Current % Class% Prepayment% Class A 9,978,127.33 2.85024833% 9,~~914~~896,~~010~~817.6239 5.~~27408858~~81886312% 94.~~725911~~181137% 100.000000% Class B-1 5,252,127.33 1.50026820% 5,~~218~~209,~~378~~328.6070 23.~~77609053~~06284025% 2.~~497998~~756023% 0.000000% Class B-2 2,976,127.33 0.85012966% 2,~~957~~951,~~003~~875.5541 1.~~57307665~~73556390% 1.~~203014~~327276% 0.000000% Class B-3 1,926,127.33 0.55019755% 1,~~913~~910,~~750~~431.5667 1.~~01808343~~12324396% 0.~~554993~~612320% 0.000000% Class B-4 1,226,127.33 0.35024281% 1,~~218~~216,~~248~~135.5784 0.~~64808796~~71503067% 0.~~369995~~408213% 0.000000% Class B-5 701,127.33 0.20027676% ~~696~~695,~~622~~413.0897 0.~~37059135~~40887070% 0.~~277497~~306160% 0.000000% Class B-6 0.00 0.00000000% 0.00 0.00000000% 0.~~370591~~408871% 0.000000% Please Refer to the Prospectus Supplement for a Full Description of Loss Exposure

COLLATERAL STATEMENT Collateral Description 7/1 CMT ARM Weighted Average Gross Coupon 5.~~601312~~588155% Weighted Average Net Coupon 5.~~216312~~203155% Weighted Average Pass-Through Rate 5.~~216312~~203155% Weighted Average Maturity(Stepdown Calculation ) ~~349~~347 Beginning Scheduled Collateral Loan Count ~~457~~396 Number Of Loans Paid In Full 3411 Ending Scheduled Collateral Loan Count ~~423~~385 Beginning Scheduled Collateral Balance ~~205~~175,~~285~~014,~~883~~862.8803 Ending Scheduled Collateral Balance ~~187~~170,~~975~~081,~~807~~632.8456 Ending Actual Collateral Balance at 30-~~Sep~~Nov-2003 ~~169~~174,~~047~~217,~~185~~603.3717 Monthly P &I Constant 1975,~~143,540~~112.9923 Special Servicing Fee 0.00 Prepayment Penalties 0.00 Realized Loss Amount 0.00 Cumulative Realized Loss 0.00 Class A Optimal Amount 185,~~151~~640,~~132~~295.7673 Ending Scheduled Balance for Premium Loans ~~187~~170,~~975~~081,~~807~~632.8456 Scheduled Principal ~~168~~156,~~924~~037.8823 Unscheduled Principal 174,~~141~~777,~~151~~192.1624 Unpaid Principal Balance Of Outstanding Mortgage Loans With Or Less Than Or Equal To 80% ~~184~~166,~~799~~913,~~867~~813.3542 Greater Than 80%, less than or equal to 85% ~~697~~696,~~994~~431.4981 Greater than 85%, less than or equal to 95% 2,~~481~~476,~~431~~309.2029 Greater than 95% 0.00

Filing Compare · WELLS FARGO MORTGAGE BACKED SECURITIES 2003-B TRUST