8-K 1 wfm0300b.txt OCTOBER 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): October 27, 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 October 27, 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 October 27, 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, Assistant Vice President By: Beth Belfield, Assistant Vice President Date: 10/28/03 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 October 27, 2003 distribution. EX-99.1

Wells Fargo Asset Securities Corporation Mortgage Pass-Through Certificates Record Date: 89/3130/03 Distribution Date: 910/2527/03 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% ~~115~~103,~~007~~397,~~459~~130.8366 ~~397~~357,~~727~~581.4374 119,~~610~~157,~~329~~115.1720 A-2 94980UAB6 SEQ 4.75000% ~~102~~91,~~293~~966,~~385~~577.1486 ~~404~~364,~~904~~034.4937 108,~~326~~144,~~807~~796.2812 A-3 94980UAC4 SEQ 0.~~79268~~78380% 0.00 ~~143~~127,~~539~~605.0933 0.00 A-R 94980UAE0 SEQ 5.~~21599~~20604% 0.00 0.00 0.00 ALR 94980UAD2 SEQ 5.~~21599~~20604% 0.00 0.00 0.00 B-1 94980UAF7 SUB 5.~~22513~~21625% 4,~~703~~699,~~312~~499.5913 20,~~479~~428.1613 3,~~813~~867.4611 B-2 94980UAG5 SUB 5.~~22513~~21625% 2,~~265~~263,~~073~~237.9441 9,~~862~~838.5801 1,~~836~~862.5336 B-3 94980UAH3 SUB 5.~~22513~~21625% 1,044,~~959~~112.4216 4,~~549~~538.9662 ~~847~~859.2618 B-4 94980UAJ9 SUB 5.~~22513~~21625% 696,~~639~~074.6178 3,~~033~~025.3175 ~~564~~572.8478 B-5 94980UAK6 SUB 5.~~22513~~21625% 522,~~479~~056.7108 2,~~274~~269.9831 ~~423~~429.6359 B-6 94980UAL4 SUB 5.~~22513~~21625% 697,~~761~~195.5378 3,~~038~~030.1962 ~~565~~573.7571 Totals ~~227~~205,~~231~~285,~~071~~883.7786 ~~989~~892,~~409~~351.1988 2117,~~945~~310,~~187~~076.9205

Certificateholder Distribution Summary (continued) Current Ending Cumulative Realized Certificate Total Realized Class Loss Balance Distribution Losses A-1 0.00 ~~103~~94,~~397~~240,~~130~~015.6645 129,~~008~~514,~~056~~696.6094 0.00 A-2 0.00 9183,~~966~~821,~~577~~781.8675 108,~~731~~508,~~711~~830.7749 0.00 A-3 0.00 0.00 ~~143~~127,~~539~~605.0933 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,~~699~~695,~~499~~632.1302 24,~~292~~295.6224 0.00 B-2 0.00 2,~~263~~261,~~237~~375.4105 11,~~699~~700.1137 0.00 B-3 0.00 1,~~044~~043,~~112~~252.1699 5,397.2280 0.00 B-4 0.00 ~~696~~695,~~074~~501.7899 3,598.1553 0.00 B-5 0.00 ~~522~~521,~~056~~626.0849 2,698.6190 0.00 B-6 0.00 ~~697~~696,~~195~~622.7808 3,~~603~~604.9433 0.00 Totals 0.00 ~~205~~187,~~285~~975,~~883~~807.8682 2218,~~934~~202,~~597~~427.1193 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 ~~115~~103,~~007~~397,~~459~~130.8366 9385,~~248~~083.3104 119,~~517~~072,~~080~~032.8616 0.00 0.00 A-2 160,101,000.00 ~~102~~91,~~293~~966,~~385~~577.1486 8275,~~939~~677.7011 108,~~243~~069,~~867~~119.5800 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,~~703~~699,~~312~~499.5913 3,~~813~~867.4611 0.00 0.00 0.00 B-2 2,276,000.00 2,~~265~~263,~~073~~237.9441 1,~~836~~862.5336 0.00 0.00 0.00 B-3 1,050,000.00 1,044,~~959~~112.4216 ~~847~~859.2618 0.00 0.00 0.00 B-4 700,000.00 696,~~639~~074.6178 ~~564~~572.8478 0.00 0.00 0.00 B-5 525,000.00 522,~~479~~056.7108 ~~423~~429.6359 0.00 0.00 0.00 B-6 701,127.33 697,~~761~~195.5378 ~~565~~573.7571 0.00 0.00 0.00 Totals 350,079,227.33 ~~227~~205,~~231~~285,~~071~~883.7786 ~~184~~168,~~239~~924.4888 2117,~~760~~141,~~948~~151.4416 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-1 119,~~610~~157,~~329~~115.1720 ~~103~~94,~~397~~240,~~130~~015.6645 0.~~57442850~~52355564 119,~~610~~157,~~329~~115.1720 A-2 108,~~326~~144,~~807~~796.2812 9183,~~966~~821,~~577~~781.8675 0.~~57442850~~52355564 108,~~326~~144,~~807~~796.2812 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 3,~~813~~867.4611 4,~~699~~695,~~499~~632.1302 0.~~99439254~~99357427 3,~~813~~867.4611 B-2 1,~~836~~862.5336 2,~~263~~261,~~237~~375.4105 0.~~99439254~~99357428 1,~~836~~862.5336 B-3 ~~847~~859.2618 1,~~044~~043,~~112~~252.1699 0.~~99439253~~99357428 ~~847~~859.2618 B-4 ~~564~~572.8478 ~~696~~695,~~074~~501.7899 0.~~99439254~~99357427 ~~564~~572.8478 B-5 ~~423~~429.6359 ~~522~~521,~~056~~626.0849 0.~~99439253~~99357427 ~~423~~429.6359 B-6 ~~565~~573.7571 ~~697~~696,~~195~~622.7808 0.~~99439253~~99357428 ~~565~~573.7571 Totals 2117,~~945~~310,~~187~~076.9205 ~~205~~187,~~285~~975,~~883~~807.8682 0.~~58639836~~53695219 2117,~~945~~310,~~187~~076.9205

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 ~~638~~574.~~93033239~~42850367 0.~~51804617~~47268356 6350.~~98378256~~40017867 0.00000000 A-2 160,101,000.00 ~~638~~574.~~93033235~~42850363 0.~~51804611~~47268356 6350.~~98378261~~40017864 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 ~~995~~994.~~19944774~~39253703 0.~~80691071~~81826280 0.00000000 0.00000000 B-2 2,276,000.00 ~~995~~994.~~19944640~~39253515 0.~~80691125~~81826011 0.00000000 0.00000000 B-3 1,050,000.00 ~~995~~994.~~19944762~~39253333 0.~~80691429~~81826667 0.00000000 0.00000000 B-4 700,000.00 ~~995~~994.~~19944286~~39254286 0.~~80691429~~81825714 0.00000000 0.00000000 B-5 525,000.00 ~~995~~994.~~19944762~~39253333 0.~~80691429~~81826667 0.00000000 0.00000000 B-6 701,127.33 ~~995~~994.~~19944544~~39253067 0.~~80691477~~81826792 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 6450.~~50182872~~87286222 ~~574~~523.~~42850367~~55564139 0.~~57442850~~52355564 6450.~~50182872~~87286222 A-2 0.00000000 6450.~~50182872~~87286226 ~~574~~523.~~42850363~~55564144 0.~~57442850~~52355564 6450.~~50182872~~87286226 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.~~80691071~~81826280 ~~994~~993.~~39253703~~57427423 0.~~99439254~~99357427 0.~~80691071~~81826280 B-2 0.00000000 0.~~80691125~~81826011 ~~994~~993.~~39253515~~57427504 0.~~99439254~~99357428 0.~~80691125~~81826011 B-3 0.00000000 0.~~80691429~~81826667 ~~994~~993.~~39253333~~57427619 0.~~99439253~~99357428 0.~~80691429~~81826667 B-4 0.00000000 0.~~80691429~~81825714 ~~994~~993.~~39254286~~57427143 0.~~99439254~~99357427 0.~~80691429~~81825714 B-5 0.00000000 0.~~80691429~~81826667 ~~994~~993.~~39253333~~57426667 0.~~99439253~~99357427 0.~~80691429~~81826667 B-6 0.00000000 0.~~80691477~~81826792 ~~994~~993.~~39253067~~57427701 0.~~99439253~~99357428 0.~~80691477~~81826792 (3) Amount Does Not Include Excess Special Hazard, ~~Bankrupcy~~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% ~~115~~103,~~007~~397,~~459~~130.8366 ~~397~~357,~~734~~581.1374 0.00 0.00 A-2 160,101,000.00 4.75000% ~~102~~91,~~293~~966,~~385~~577.1486 ~~404~~364,~~911~~034.3237 0.00 0.00 A-3 0.00 0.~~79268~~78380% ~~217~~195,~~300~~363,~~844~~708.9752 ~~143~~127,~~541~~605.5133 0.00 0.00 A-R 50.00 5.~~21599~~20604% 0.00 0.00 0.00 0.00 ALR 50.00 5.~~21599~~20604% 0.00 0.00 0.00 0.00 B-1 4,726,000.00 5.~~22513~~21625% 4,~~703~~699,~~312~~499.5913 20,~~479~~428.5013 0.00 0.00 B-2 2,276,000.00 5.~~22513~~21625% 2,~~265~~263,~~073~~237.9441 9,~~862~~838.7501 0.00 0.00 B-3 1,050,000.00 5.~~22513~~21625% 1,044,~~959~~112.4216 4,~~550~~538.0462 0.00 0.00 B-4 700,000.00 5.~~22513~~21625% 696,~~639~~074.6178 3,~~033~~025.3675 0.00 0.00 B-5 525,000.00 5.~~22513~~21625% 522,~~479~~056.7108 2,~~275~~269.0231 0.00 0.00 B-6 701,127.33 5.~~22513~~21625% 697,~~761~~195.5378 3,~~038~~030.2462 0.00 0.00 Totals 350,079,227.33 ~~989~~892,~~425~~351.8788 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 60.7000 0.00 ~~397~~357,~~727~~581.4374 0.00 ~~103~~94,~~397~~240,~~130~~015.6645 A-2 60.8200 0.00 ~~404~~364,~~904~~034.4937 0.00 9183,~~966~~821,~~577~~781.8675 A-3 20.4200 0.00 ~~143~~127,~~539~~605.0933 0.00 ~~195~~178,~~363~~061,~~708~~797.5220 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 0.3500 0.00 20,~~479~~428.1613 0.00 4,~~699~~695,~~499~~632.1302 B-2 0.1700 0.00 9,~~862~~838.5801 0.00 2,~~263~~261,~~237~~375.4105 B-3 0.0800 0.00 4,~~549~~538.9662 0.00 1,~~044~~043,~~112~~252.1699 B-4 0.0500 0.00 3,~~033~~025.3175 0.00 ~~696~~695,~~074~~501.7899 B-5 0.0400 0.00 2,~~274~~269.9831 0.00 ~~522~~521,~~056~~626.0849 B-6 0.0500 0.00 3,~~038~~030.1962 0.00 ~~697~~696,~~195~~622.7808 Totals 160.6800 0.00 ~~989~~892,~~409~~351.1988 0.00 (4) Amount Does Not Include Excess Special Hazard, ~~Bankrupcy~~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% ~~638~~574.~~93033239~~42850367 21.~~20963406~~98656522 0.00000000 0.00000000 A-2 160,101,000.00 4.75000% ~~638~~574.~~93033235~~42850363 2.~~52909926~~27377949 0.00000000 0.00000000 A-3 0.00 0.~~79268~~78380% ~~638~~574.~~93033237~~42850365 0.~~42205554~~37519834 0.00000000 0.00000000 A-R 50.00 5.~~21599~~20604% 0.00000000 0.00000000 0.00000000 0.00000000 ALR 50.00 5.~~21599~~20604% 0.00000000 0.00000000 0.00000000 0.00000000 B-1 4,726,000.00 5.~~22513~~21625% ~~995~~994.~~19944774~~39253703 4.~~33336860~~32249894 0.00000000 0.00000000 B-2 2,276,000.00 5.~~22513~~21625% ~~995~~994.~~19944640~~39253515 4.~~33336995~~32250000 0.00000000 0.00000000 B-3 1,050,000.00 5.~~22513~~21625% ~~995~~994.~~19944762~~39253333 4.~~33337143~~32249524 0.00000000 0.00000000 B-4 700,000.00 5.~~22513~~21625% ~~995~~994.~~19944286~~39254286 4.~~33337143~~32250000 0.00000000 0.00000000 B-5 525,000.00 5.~~22513~~21625% ~~995~~994.~~19944762~~39253333 4.~~33337143~~32249524 0.00000000 0.00000000 B-6 701,127.33 5.~~22513~~21625% ~~995~~994.~~19944544~~39253067 4.~~33336410~~32249589 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.~~00003722~~00000000 0.00000000 21.~~20959683~~98656522 0.00000000 ~~574~~523.~~42850367~~55564139 A-2 0.~~00004260~~00000000 0.00000000 2.~~52905660~~27377949 0.00000000 ~~574~~523.~~42850363~~55564144 A-3 0.~~00000712~~00000000 0.00000000 0.~~42204842~~37519834 0.00000000 ~~574~~523.~~42850365~~55564141 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.~~00007406~~00000000 0.00000000 4.~~33329666~~32249894 0.00000000 ~~994~~993.~~39253703~~57427423 B-2 0.~~00007469~~00000000 0.00000000 4.~~33329525~~32250000 0.00000000 ~~994~~993.~~39253515~~57427504 B-3 0.~~00007619~~00000000 0.00000000 4.~~33329524~~32249524 0.00000000 ~~994~~993.~~39253333~~57427619 B-4 0.~~00007143~~00000000 0.00000000 4.~~33330000~~32250000 0.00000000 ~~994~~993.~~39254286~~57427143 B-5 0.~~00007619~~00000000 0.00000000 4.~~33329524~~32249524 0.00000000 ~~994~~993.~~39253333~~57426667 B-6 0.~~00007131~~00000000 0.00000000 4.~~33329278~~32249589 0.00000000 ~~994~~993.~~39253067~~57427701 (6) Amount Does Not Include Excess Special Hazard, ~~Bankrupcy~~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 2318,~~107~~259,~~759~~841.0442 Liquidations, Insurance Proceeds, Reserve Funds 0.00 Proceeds from Repurchased Loans 0.00 Other Amounts (Servicer Advances) 2619,~~722~~792.7812 Realized Loss (Gains, Subsequent Expenses & Recoveries) 0.00 Prepayment Penalties 0.00 Total Deposits 2318,~~134~~279,~~481~~633.8254 Withdrawals Reimbursement for Servicer Advances ~~144~~26,~~221~~722.4178 Payment of Service Fee 5550,~~663~~482.3383 Payment of Interest and Principal 2218,~~934~~202,~~597~~427.0993 Total Withdrawals (Pool Distribution Amount) 2318,~~134~~279,~~481~~633.8354 Ending Balance 0.00

PREPAYMENT/CURTAILMENT INTEREST SHORTFALL Total Prepayment/Curtailment Interest Shortfall 1715,~~254~~378.6093 Servicing Fee Support 1715,~~237~~378.9293 Non-Supported Prepayment/Curtailment Interest Shortfall 160.6800

SERVICING FEES Gross Servicing Fee 7164,~~007~~151.7106 Master Servicing Fee 1,~~893~~710.5470 Supported Prepayment/Curtailment Interest Shortfall 1715,~~237~~378.9293 Net Servicing Fee 5550,~~663~~482.3383

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 10 0 0 0 10 ~~570,636~~0.00 0.00 0.00 0.00 ~~570,636~~0.00 60 Days 01 0 0 0 01 0570,636.00 0.00 0.00 0.00 0570,636.00 90 Days 0 0 0 0 0 0.00 0.00 0.00 0.00 0.00 120 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 1 0 0 0 1 570,636.00 0.00 0.00 0.00 570,636.00 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.~~218818~~000000% 0.000000% 0.000000% 0.000000% 0.~~218818~~000000% 0.~~310844~~000000% 0.000000% 0.000000% 0.000000% 0.~~310844~~000000% 60 Days 0.~~000000~~236407% 0.000000% 0.000000% 0.000000% 0.~~000000~~236407% 0.~~000000~~337560% 0.000000% 0.000000% 0.000000% 0.~~000000~~337560% 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% 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 0.~~218818~~236407% 0.000000% 0.000000% 0.000000% 0.~~218818~~236407% 0.~~310844~~337560% 0.000000% 0.000000% 0.000000% 0.~~310844~~337560%

OTHER INFORMATION Current Period Class A Insufficient Funds 0.00 Principal Balance of Contaminated Properties 0.00 Periodic Advance 6258,~~795~~929.3920

SUBORDINATION LEVEL/CLASS PERCENTAGE AND PREPAYMENT PERCENTAGE Current Original $ Original % Current $ Current % Class% Prepayment% Class A 9,978,127.33 2.85024833% 9,~~922~~914,~~175~~010.3462 45.~~83334516~~27408858% 9594.~~166655~~725911% 100.000000% Class B-1 5,252,127.33 1.50026820% 5,~~222~~218,~~676~~378.2160 2.~~54409904~~77609053% 2.~~289246~~497998% 0.000000% Class B-2 2,976,127.33 0.85012966% 2,~~959~~957,~~438~~003.8055 1.~~44161827~~57307665% 1.~~102481~~203014% 0.000000% Class B-3 1,926,127.33 0.55019755% 1,~~915~~913,~~326~~750.6456 01.~~93300455~~01808343% 0.~~508614~~554993% 0.000000% Class B-4 1,226,127.33 0.35024281% 1,~~219~~218,~~251~~248.8657 0.~~59392874~~64808796% 0.~~339076~~369995% 0.000000% Class B-5 701,127.33 0.20027676% ~~697~~696,~~195~~622.7808 0.~~33962188~~37059135% 0.~~254307~~277497% 0.000000% Class B-6 0.00 0.00000000% 0.00 0.00000000% 0.~~339622~~370591% 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.~~610186~~601312% Weighted Average Net Coupon 5.~~225186~~216312% Weighted Average Pass-Through Rate 5.~~225186~~216312% Weighted Average Maturity(Stepdown Calculation ) ~~350~~349 Beginning Scheduled Collateral Loan Count ~~500~~457 Number Of Loans Paid In Full 4334 Ending Scheduled Collateral Loan Count ~~457~~423 Beginning Scheduled Collateral Balance ~~227~~205,~~231~~285,~~071~~883.7888 Ending Scheduled Collateral Balance ~~205~~187,~~285~~975,~~883~~807.8884 Ending Actual Collateral Balance at 3130-~~Aug~~Sep-2003 ~~183~~169,~~576~~047,~~565~~185.8337 Monthly P &I Constant 1,~~261~~143,~~936~~540.0099 Special Servicing Fee 0.00 Prepayment Penalties 0.00 Realized Loss Amount 0.00 Cumulative Realized Loss 0.00 Class A Optimal Amount 2218,~~883~~151,~~323~~132.4076 Ending Scheduled Balance for Premium Loans ~~205~~187,~~285~~975,~~883~~807.8884 Scheduled Principal ~~184~~168,~~239~~924.4688 Unscheduled Principal 2117,~~760~~141,~~948~~151.4416 Unpaid Principal Balance Of Outstanding Mortgage Loans With Or Less Than Or Equal To 80% ~~202~~184,~~108~~799,~~076~~867.3335 Greater Than 80%, less than or equal to 85% ~~698~~697,~~770~~994.3349 Greater than 85%, less than or equal to 95% 2,~~483~~481,~~808~~431.2120 Greater than 95% 0.00

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