8-K 1 wfm0400b_dec.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 27, 2004 WELLS FARGO ASSET SECURITIES CORPORATION Mortgage Pass-Through Certificates, Series 2004-B Trust (Exact name of registrant as specified in its charter) New York (governing law of 333-110283-12 54-2144720 Pooling and Servicing Agreement) (Commission IRS EIN (State or other File Number) jurisdiction 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) Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below): [ ] Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) [ ] Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) [ ] Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act(17 CFR 240.14d-2(b)) [ ] Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act(17 CFR 240.13e-4(c)) ITEM 8.01 Other Events On December 27, 2004 a distribution was made to holders of WELLS FARGO ASSET SECURITIES CORPORATION, Mortgage Pass-Through Certificates, Series 2004-B Trust. ITEM 9.01 Financial Statements and Exhibits (c) Exhibits Exhibit Number Description EX-99.1 Monthly report distributed to holders of Mortgage Pass-Through Certificates, Series 2004-B Trust, relating to the December 27, 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. WELLS FARGO ASSET SECURITIES CORPORATION Mortgage Pass-Through Certificates, Series 2004-B Trust (Registrant) By: Wells Fargo Bank, N.A. as Master Servicer By: /s/ Beth Belfield as Assistant Vice President By: Beth Belfield as Assistant Vice President Date: 12/27/2004 INDEX TO EXHIBITS Exhibit Number Description EX-99.1 Monthly report distributed to holders of Mortgage Pass-Through Certificates, Series 2004-B Trust, relating to the December 27, 2004 distribution. EX-99.1

Wells Fargo Asset Securities Corporation Mortgage Pass-Through Certificates Record Date: 1011/3130/2004 Distribution Date: 1112/2627/2004 ~~WFMBS~~Wells Fargo Asset Securities Corporation Mortgage Pass-Through Certificates Series: 2004-B 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 A-1 94981KAA9 SEN 4.~~97373~~97245% ~~158~~155,~~101~~787,~~140~~027.3595 ~~655~~645,~~238~~417.9132 23,~~314~~576,~~112~~179.4050 A-R 94981KAB7 SEN 4.~~97245~~96589% 0.00 0.00 0.00 B-1 94981KAC5 SUB 4.~~97373~~97245% 2,~~473~~470,~~327~~342.9402 10,~~250~~234.5349 2,~~985~~989.9204 B-2 94981KAD3 SUB 4.~~97373~~97245% 1,~~443~~441,~~022~~279.0698 5,~~980~~971.5015 1,~~742~~743.0891 B-3 94981KAE1 SUB 4.~~97373~~97245% ~~618~~617,~~579~~832.4264 2,~~563~~559.6665 ~~746~~747.7856 B-4 94981KAF8 SUB 4.~~97373~~97245% ~~618~~617,~~579~~832.4264 2,~~563~~559.6665 ~~746~~747.7856 B-5 94981KAG6 SUB 4.~~97373~~97245% 411,~~726~~229.4640 1,~~706~~703.3770 497.0658 B-6 94981KAH4 SUB 4.~~97373~~97245% ~~310~~309,~~180~~806.7427 1,~~285~~283.5251 374.4686 Totals ~~163~~161,~~976~~655,~~556~~350.3990 ~~679~~669,~~589~~729.1547 23,~~321~~583,~~205~~280.4801

Certificateholder Distribution Summary (continued) Current Ending Cumulative Realized Certificate Total Realized Class Loss Balance Distribution Losses A-1 0.00 ~~155~~152,~~787~~210,~~027~~848.9545 24,~~969~~221,~~351~~596.3182 0.00 A-R 0.00 0.00 0.00 0.00 B-1 0.00 2,~~470~~467,~~342~~352.0298 13,~~236~~223.4553 0.00 B-2 0.00 1,~~441~~439,~~279~~536.9807 7,~~722~~715.5806 0.00 B-3 0.00 617,~~832~~085.6408 3,~~310~~307.4421 0.00 B-4 0.00 617,~~832~~085.6408 3,~~310~~307.4421 0.00 B-5 0.00 ~~411~~410,~~229~~731.4083 2,~~203~~201.4328 0.00 B-6 0.00 309,~~806~~431.2742 1,~~659~~658.9837 0.00 Totals 0.00 ~~161~~158,~~655~~072,~~350~~070.9091 34,~~000~~253,~~794~~009.6348 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-1 202,354,000.00 ~~158~~155,~~101~~787,~~140~~027.3595 ~~190~~188,~~867~~497.2361 23,~~123~~387,~~245~~681.1789 0.00 0.00 A-R 100.00 0.00 0.00 0.00 0.00 0.00 B-1 2,499,000.00 2,~~473~~470,~~327~~342.9402 2,~~985~~989.9204 0.00 0.00 0.00 B-2 1,458,000.00 1,~~443~~441,~~022~~279.0698 1,~~742~~743.0891 0.00 0.00 0.00 B-3 625,000.00 ~~618~~617,~~579~~832.4264 ~~746~~747.7856 0.00 0.00 0.00 B-4 625,000.00 ~~618~~617,~~579~~832.4264 ~~746~~747.7856 0.00 0.00 0.00 B-5 416,000.00 411,~~726~~229.4640 497.0658 0.00 0.00 0.00 B-6 313,400.28 ~~310~~309,~~180~~806.7427 374.4686 0.00 0.00 0.00 Totals 208,290,500.28 ~~163~~161,~~976~~655,~~556~~350.3990 ~~197~~195,~~960~~598.3112 23,~~123~~387,~~245~~681.1789 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 23,~~314~~576,~~112~~179.4050 ~~155~~152,~~787~~210,~~027~~848.9545 0.~~76987373~~75220084 23,~~314~~576,~~112~~179.4050 A-R 0.00 0.00 0.00000000 0.00 B-1 2,~~985~~989.9204 2,~~470~~467,~~342~~352.0298 0.~~98853222~~98733613 2,~~985~~989.9204 B-2 1,~~742~~743.0891 1,~~441~~439,~~279~~536.9807 0.~~98853222~~98733612 1,~~742~~743.0891 B-3 ~~746~~747.7856 617,~~832~~085.6408 0.~~98853222~~98733613 ~~746~~747.7856 B-4 ~~746~~747.7856 617,~~832~~085.6408 0.~~98853222~~98733613 ~~746~~747.7856 B-5 497.0658 ~~411~~410,~~229~~731.4083 0.~~98853221~~98733613 497.0658 B-6 374.4686 309,~~806~~431.2742 0.~~98853221~~98733613 374.4686 Totals 23,~~321~~583,~~205~~280.4801 ~~161~~158,~~655~~072,~~350~~070.9091 0.~~77610525~~75890197 23,~~321~~583,~~205~~280.4801

Principal Distribution Factors Statement Original Beginning Scheduled Unscheduled Face Certificate Principal Principal Class (2) Amount Balance Distribution Distribution Accretion A-1 202,354,000.00 ~~781~~769.~~30968674~~87372600 0.~~94323428~~93152401 1016.~~49272646~~74136360 0.00000000 A-R 100.00 0.00000000 0.00000000 0.00000000 0.00000000 B-1 2,499,000.00 ~~989~~988.~~72706683~~53222089 1.~~19484594~~19609444 0.00000000 0.00000000 B-2 1,458,000.00 ~~989~~988.~~72706447~~53222222 1.~~19484225~~19609739 0.00000000 0.00000000 B-3 625,000.00 ~~989~~988.~~72707200~~53222400 1.~~19484800~~19609600 0.00000000 0.00000000 B-4 625,000.00 ~~989~~988.~~72707200~~53222400 1.~~19484800~~19609600 0.00000000 0.00000000 B-5 416,000.00 ~~989~~988.~~72706731~~53221154 1.~~19485577~~19610577 0.00000000 0.00000000 B-6 313,400.28 ~~989~~988.~~72706725~~53220552 1.~~19482982~~19610614 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 1117.~~43596074~~67288761 ~~769~~752.~~87372600~~20083838 0.~~76987373~~75220084 1117.~~43596074~~67288761 A-R 0.00000000 0.00000000 0.00000000 0.00000000 0.00000000 B-1 0.00000000 1.~~19484594~~19609444 ~~988~~987.~~53222089~~33612645 0.~~98853222~~98733613 1.~~19484594~~19609444 B-2 0.00000000 1.~~19484225~~19609739 ~~988~~987.~~53222222~~33612483 0.~~98853222~~98733612 1.~~19484225~~19609739 B-3 0.00000000 1.~~19484800~~19609600 ~~988~~987.~~53222400~~33612800 0.~~98853222~~98733613 1.~~19484800~~19609600 B-4 0.00000000 1.~~19484800~~19609600 ~~988~~987.~~53222400~~33612800 0.~~98853222~~98733613 1.~~19484800~~19609600 B-5 0.00000000 1.~~19485577~~19610577 ~~988~~987.~~53221154~~33612981 0.~~98853221~~98733613 1.~~19485577~~19610577 B-6 0.00000000 1.~~19482982~~19610614 ~~988~~987.~~53220552~~33613129 0.~~98853221~~98733613 1.~~19482982~~19610614 (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-1 202,354,000.00 4.~~97373~~97245% ~~158~~155,~~101~~787,~~140~~027.3595 ~~655~~645,~~293~~535.5075 0.00 0.00 A-R 100.00 4.~~97245~~96589% 0.00 0.00 0.00 0.00 B-1 2,499,000.00 4.~~97373~~97245% 2,~~473~~470,~~327~~342.9402 10,~~251~~236.3937 0.00 0.00 B-2 1,458,000.00 4.~~97373~~97245% 1,~~443~~441,~~022~~279.0698 5,~~981~~972.0024 0.00 0.00 B-3 625,000.00 4.~~97373~~97245% ~~618~~617,~~579~~832.4264 2,~~563~~560.8712 0.00 0.00 B-4 625,000.00 4.~~97373~~97245% ~~618~~617,~~579~~832.4264 2,~~563~~560.8712 0.00 0.00 B-5 416,000.00 4.~~97373~~97245% 411,~~726~~229.4640 1,~~706~~704.5101 0.00 0.00 B-6 313,400.28 4.~~97373~~97245% ~~310~~309,~~180~~806.7427 1,~~285~~283.6375 0.00 0.00 Totals 208,290,500.28 ~~679~~669,~~645~~852.7736 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 54118.6043 0.00 ~~655~~645,~~238~~417.9132 0.00 ~~155~~152,~~787~~210,~~027~~848.9545 A-R 0.00 0.00 0.00 0.00 0.00 B-1 01.8588 0.00 10,~~250~~234.5349 0.00 2,~~470~~467,~~342~~352.0298 B-2 01.5010 0.00 5,~~980~~971.5015 0.00 1,~~441~~439,~~279~~536.9807 B-3 0.2147 0.00 2,~~563~~559.6665 0.00 617,~~832~~085.6408 B-4 0.2147 0.00 2,~~563~~559.6665 0.00 617,~~832~~085.6408 B-5 0.1431 0.00 1,~~706~~703.3770 0.00 ~~411~~410,~~229~~731.4083 B-6 0.1124 0.00 1,~~285~~283.5251 0.00 309,~~806~~431.2742 Totals 56122.6290 0.00 ~~679~~669,~~589~~729.1547 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-1 202,354,000.00 4.~~97373~~97245% ~~781~~769.~~30968674~~87372600 3.~~23835210~~19013091 0.00000000 0.00000000 A-R 100.00 4.~~97245~~96589% 0.00000000 0.00000000 0.00000000 0.00000000 B-1 2,499,000.00 4.~~97373~~97245% ~~989~~988.~~72706683~~53222089 4.~~10219688~~09618647 0.00000000 0.00000000 B-2 1,458,000.00 4.~~97373~~97245% ~~989~~988.~~72706447~~53222222 4.~~10219479~~09618656 0.00000000 0.00000000 B-3 625,000.00 4.~~97373~~97245% ~~989~~988.~~72707200~~53222400 4.~~10219200~~09619200 0.00000000 0.00000000 B-4 625,000.00 4.~~97373~~97245% ~~989~~988.~~72707200~~53222400 4.~~10219200~~09619200 0.00000000 0.00000000 B-5 416,000.00 4.~~97373~~97245% ~~989~~988.~~72706731~~53221154 4.~~10218750~~09617788 0.00000000 0.00000000 B-6 313,400.28 4.~~97373~~97245% ~~989~~988.~~72706725~~53220552 4.~~10219799~~09619928 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.~~00026982~~00058526 0.00000000 3.~~23808232~~18954565 0.00000000 ~~769~~752.~~87372600~~20083838 A-R 0.00000000 0.00000000 0.00000000 0.00000000 0.00000000 B-1 0.~~00034014~~00075230 0.00000000 4.~~10185274~~09543417 0.00000000 ~~988~~987.~~53222089~~33612645 B-2 0.~~00034294~~00075446 0.00000000 4.~~10185185~~09543896 0.00000000 ~~988~~987.~~53222222~~33612483 B-3 0.~~00033600~~00075200 0.00000000 4.~~10185600~~09544000 0.00000000 ~~988~~987.~~53222400~~33612800 B-4 0.~~00033600~~00075200 0.00000000 4.~~10185600~~09544000 0.00000000 ~~988~~987.~~53222400~~33612800 B-5 0.~~00033654~~00074519 0.00000000 4.~~10185096~~09543269 0.00000000 ~~988~~987.~~53221154~~33612981 B-6 0.~~00035099~~00076579 0.00000000 4.~~10184701~~09543348 0.00000000 ~~988~~987.~~53220552~~33613129 (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 024,487.0070 Deposits Payments of Interest and Principal 34,~~146~~301,~~962~~771.1913 Liquidations, Insurance Proceeds, Reserve Funds 0.00 Proceeds from Repurchased Loans 0.00 Other Amounts (Servicer Advances) 0.00 Realized Loss (Gains, Subsequent Expenses & Recoveries) 0.00 Prepayment Penalties 0.00 Total Deposits 34,~~146~~301,~~962~~771.1913 Withdrawals Reimbursement for Servicer Advances ~~70,629~~0.7200 Payment of Service Fee 5148,~~050~~016.1416 Payment of Interest and Principal 34,~~000~~253,~~794~~009.6346 Total Withdrawals (Pool Distribution Amount) 34,~~122~~301,~~474~~025.4962 Ending Balance 2425,~~487~~233.7021

PREPAYMENT/CURTAILMENT INTEREST SHORTFALL Total Prepayment/Curtailment Interest Shortfall 13,~~608~~962.7305 Servicing Fee Support 13,~~552~~839.1115 Non-Supported Prepayment/Curtailment Interest Shortfall 56122.6290

SERVICING FEES Gross Servicing Fee 5150,~~235~~508.9642 Master Servicing Fee 1,~~366~~346.2989 Supported Prepayment/Curtailment Interest Shortfall 13,~~552~~839.1115 Net Servicing Fee 5148,~~050~~016.1416

OTHER INFORMATION Current Period Class A Insufficient Funds 0.00 Principal Balance of Contaminated Properties 0.00 Periodic Advance 2426,~~510~~758.7282

SUBORDINATION LEVEL/CLASS PERCENTAGE AND PREPAYMENT PERCENTAGE Current Original $ Original % Current $ Current % Class% Prepayment% Class A 5,936,400.28 2.85005810% 5,~~868~~861,~~322~~222.9546 3.~~63014457~~70794311% 96.~~369855~~292057% 100.000000% Class B-1 3,437,400.28 1.65029143% 3,~~397~~393,~~980~~869.9348 2.~~10199100~~14703930% 1.~~528154~~560904% 0.000000% Class B-2 1,979,400.28 0.95030752% 1,~~956~~954,~~700~~333.9541 1.~~21041521~~23635592% 0.~~891576~~910683% 0.000000% Class B-3 1,354,400.28 0.65024582% 1,~~338~~337,~~868~~248.3133 0.~~82822394~~84597382% 0.~~382191~~390382% 0.000000% Class B-4 729,400.28 0.35018413% ~~721~~720,~~035~~163.6725 0.~~44603267~~45559171% 0.~~382191~~390382% 0.000000% Class B-5 313,400.28 0.15046307% 309,~~806~~431.2742 0.~~19164616~~19575338% 0.~~254387~~259838% 0.000000% Class B-6 0.00 0.00000000% 0.00 0.00000000% 0.~~191646~~195753% 0.000000% Please Refer to the Prospectus Supplement for a Full Description of Loss Exposure

COLLATERAL STATEMENT Collateral Description 10/1 CMT ARM Weighted Average Gross Coupon 5.~~358966~~357410% Weighted Average Net Coupon 4.~~973966~~972410% Weighted Average Pass-Through Rate 4.~~973966~~972410% Weighted Average Maturity(Stepdown Calculation ) ~~348~~347 Beginning Scheduled Collateral Loan Count ~~338~~333 Number Of Loans Paid In Full 56 Ending Scheduled Collateral Loan Count ~~333~~327 Beginning Scheduled Collateral Balance ~~163~~161,~~976~~655,~~556~~350.3991 Ending Scheduled Collateral Balance ~~161~~158,~~655~~072,~~350~~070.9192 Ending Actual Collateral Balance at 3130-~~Oct~~Nov-2004 ~~162~~159,~~762~~109,~~385~~162.0717 Monthly P &I Constant ~~932~~920,~~526~~909.3586 Special Servicing Fee 0.00 Prepayment Penalties 0.00 Realized Loss Amount 0.00 Cumulative Realized Loss 0.00 Class A Optimal Amount 24,~~969~~221,~~405~~715.9025 Ending scheduled Balance For discounted Loans ~~161~~158,~~655~~072,~~350~~070.9192 Scheduled Principal ~~197~~195,~~960~~598.3110 Unscheduled Principal 23,~~123~~387,~~245~~681.1789 Unpaid Principal Balance Of Outstanding Mortgage Loans With Original LTV: Less Than Or Equal To 80% ~~156~~153,~~218~~102,~~624~~393.7622 Greater Than 80%, less than or equal to 85% 1,~~819~~817,~~974~~669.0068 Greater than 85%, less than or equal to 95% 3,~~610~~145,~~229~~892.2506 Greater than 95% 0.00

Filing Compare · WELLS FARGO ASSET SECURITIES CORP MORTGAGE BACKED 2004-B