8-K 1 wfm01001.txt JUNE 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): June 25, 2001 WELLS FARGO ASSET SECURITIES CORPORATION Mortgage Pass-Through Certificates, Series 2001-1 Trust (Exact name of registrant as specified in its charter) New York (governing law of 333-48720-02 Pooling and Servicing Agreement) (Commission 52-2300462 (State or other File Number) IRS EIN jurisdiction of Incorporation) c/o Wells Fargo Bank Minnesota, N.A. 11000 Broken Land Parkway Columbia, MD 21044 (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, 2001 a distribution was made to holders of WELLS FARGO ASSET SECURITIES CORPORATION, Mortgage Pass-Through Certificates, Series 2001-1 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 Mortgage Pass-Through Certificates, Series 2001-1 Trust, relating to the June 25, 2001 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 2001-1 Trust By: Wells Fargo Bank Minnesota, NA, as Master Servicer By: /s/ Sherri Sharps, Vice President By: Sherri Sharps, Vice President Date: 6/25/01 INDEX TO EXHIBITS Exhibit Number Description EX-99.1 Monthly report distributed to holders of Mortgage Pass-Through Certificates, Series 2001-1 Trust, relating to the June 25, 2001 distribution. EX-99.1

Wells Fargo Asset Securities Corporation Mortgage Pass-Through Certificates Record Date: 45/3031/01 Distribution Date: 56/25/01 WFMBS Series: 2001-1 Contact: Customer Service - SecuritiesLink Wells Fargo Bank Minnesota, N.A. Securities Administration Services 7485 New Horizon Way Frederick, MD 21703 Telephone: (301) 846-8130 Fax: (301) ~~846~~815-~~8152~~6660 Certificateholder Distribution Summary Certificate Certificate Beginning Class Pass-Through Certificate Interest Principal Class CUSIP Description Rate Balance Distribution Distribution A-PO 94976KAD0 PO 0.00000% ~~408~~407,~~358~~996.9865 0.00 ~~362~~379.3316 A-1 94976KAA6 SEQ 7.00000% ~~179~~177,~~424~~470,~~670~~149.2744 1,~~046~~035,~~643~~242.9154 12,~~954~~144,~~520~~468.8309 A-2 94976KAB4 SEQ 7.00000% 13,~~864~~945,~~424~~299.0586 8081,~~875~~347.8158 (8081,~~875~~347.8158) A-3 94976KAC2 SEQ 7.00000% 22,527,000.00 131,407.50 0.00 A-R 94976KAE8 RES 7.00000% 0.00 0.00 0.00 B-1 94976KAF5 SUB 7.00000% 3,~~483~~480,~~367~~796.2758 20,~~319~~304.6465 2,~~570~~622.6904 B-2 94976KAG3 SUB 7.00000% 1,~~124~~123,~~535~~706.9203 6,~~559~~554.7995 ~~829~~846.8947 B-3 94976KAH1 SUB 7.00000% ~~786~~785,~~277~~696.1185 4,~~586~~583.6223 ~~580~~591.2686 B-4 94976KAJ7 SUB 7.00000% 561,~~769~~354.0648 3,~~276~~274.9957 ~~414~~422.5886 B-5 94976KAK4 SUB 7.00000% 337,~~261~~012.0010 1,~~967~~965.3690 ~~248~~253.8987 B-6 94976KAL2 SUB 7.00000% ~~450~~449,~~194~~862.6642 21,~~626~~286.1471 ~~287~~0.5800 Totals ~~222~~221,~~967~~088,~~858~~874.3241 1,~~298~~285,~~263~~967.7663 12,~~878~~068,~~939~~236.2477

Certificateholder Distribution Summary (continued) Current Ending Cumulative Realized Certificate Total Realized Class Loss Balance Distribution Losses A-PO 0.00 407,~~996~~617.6550 ~~362~~379.3316 0.00 A-1 0.00 ~~177~~175,~~470~~325,~~149~~681.4436 3,~~001~~179,~~164~~710.7463 0.00 A-2 0.00 1314,~~945~~026,~~299~~647.8644 0.00 0.00 A-3 0.00 22,527,000.00 131,407.50 0.00 A-R 0.00 0.00 0.00 0.00 B-1 0.00 3,~~480~~478,~~796~~174.5854 22,~~890~~926.3369 0.00 B-2 0.00 1,~~123~~122,~~706~~859.0355 7,~~389~~401.6842 0.00 B-3 0.00 785,~~696~~104.8599 5,~~166~~175.8809 0.00 B-4 0.00 ~~561~~560,~~354~~931.4861 3,~~691~~697.5743 0.00 B-5 0.00 ~~337~~336,~~012~~758.1023 2,~~216~~219.2577 0.00 B-6 44338.6688 449,~~862~~523.4254 21,~~913~~286.7271 ~~175~~514.6351 Totals 44338.6688 ~~221~~219,~~088~~020,~~874~~298.4176 3,~~177~~354,~~203~~204.0040 ~~175~~514.6351 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-PO 409,440.81 ~~408~~407,~~358~~996.9865 ~~346~~348.8494 1530.4921 0.00 0.00 A-1 181,951,000.00 ~~179~~177,~~424~~470,~~670~~149.2744 ~~166~~167,~~144~~514.6983 1,~~788~~976,~~376~~953.1425 0.00 0.00 A-2 13,624,600.00 13,~~864~~945,~~424~~299.0586 0.00 0.00 (8081,~~875~~347.8158) 0.00 A-3 22,527,000.00 22,527,000.00 0.00 0.00 0.00 0.00 A-R 100.00 0.00 0.00 0.00 0.00 0.00 B-1 3,491,000.00 3,~~483~~480,~~367~~796.2758 2,~~570~~622.6904 0.00 0.00 0.00 B-2 1,127,000.00 1,~~124~~123,~~535~~706.9203 ~~829~~846.8947 0.00 0.00 0.00 B-3 788,000.00 ~~786~~785,~~277~~696.1185 ~~580~~591.2686 0.00 0.00 0.00 B-4 563,000.00 561,~~769~~354.0648 ~~414~~422.5886 0.00 0.00 0.00 B-5 338,000.00 337,~~261~~012.0010 ~~248~~253.8987 0.00 0.00 0.00 B-6 451,181.12 ~~450~~449,~~194~~862.6642 ~~287~~0.5800 0.00 0.00 44338.6688 Totals 225,270,321.93 ~~222~~221,~~967~~088,~~858~~874.3241 ~~171~~172,~~423~~600.4287 1,~~788~~976,~~391~~983.6346 (8081,~~875~~347.8158) 44338.6688 (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-PO ~~362~~379.3316 407,~~996~~617.6550 0.~~99647285~~99554683 ~~362~~379.3316 A-1 12,~~954~~144,~~520~~468.8309 ~~177~~175,~~470~~325,~~149~~681.4436 0.~~97537331~~96358735 12,~~954~~144,~~520~~468.8309 A-2 (8081,~~875~~347.8158) 1314,~~945~~026,~~299~~647.8644 1.~~02353830~~02950894 (8081,~~875~~347.8158) A-3 0.00 22,527,000.00 1.00000000 0.00 A-R 0.00 0.00 0.00000000 0.00 B-1 2,~~570~~622.6904 3,~~480~~478,~~796~~174.5854 0.~~99707722~~99632614 2,~~570~~622.6904 B-2 ~~829~~846.8947 1,~~123~~122,~~706~~859.0355 0.~~99707722~~99632613 ~~829~~846.8947 B-3 ~~580~~591.2686 785,~~696~~104.8599 0.~~99707722~~99632613 ~~580~~591.2686 B-4 ~~414~~422.5886 ~~561~~560,~~354~~931.4861 0.~~99707723~~99632613 ~~414~~422.5886 B-5 ~~248~~253.8987 ~~337~~336,~~012~~758.1023 0.~~99707722~~99632612 ~~248~~253.8987 B-6 ~~332~~338.2488 449,~~862~~523.4254 0.~~99707723~~99632613 ~~287~~0.5800 Totals 12,~~878~~068,~~983~~575.9065 ~~221~~219,~~088~~020,~~874~~298.4176 0.~~98143809~~97225545 12,~~878~~068,~~939~~236.2477

Principal Distribution Factors Statement Original Beginning Scheduled Unscheduled Face Certificate Principal Principal Class (2) Amount Balance Distribution Distribution Accretion A-PO 409,440.81 ~~997~~996.~~35778659~~47284793 0.~~84710657~~85223552 0.~~03783209~~07378356 0.00000000 A-1 181,951,000.00 ~~986~~975.~~11532924~~37331172 0.~~91312875~~92065902 910.~~82888877~~86530577 0.00000000 A-2 13,624,600.00 ~~1017~~1023.~~60228190~~53829544 0.00000000 0.00000000 (5.~~93601353~~97063987) A-3 22,527,000.00 1000.00000000 0.00000000 0.00000000 0.00000000 A-R 100.00 0.00000000 0.00000000 0.00000000 0.00000000 B-1 3,491,000.00 997.~~81359782~~07722143 0.~~73637640~~75108565 0.00000000 0.00000000 B-2 1,127,000.00 997.~~81359361~~07722272 0.~~73637090~~75108252 0.00000000 0.00000000 B-3 788,000.00 997.~~81359137~~07722081 0.~~73637056~~75109137 0.00000000 0.00000000 B-4 563,000.00 997.~~81360568~~07722913 0.~~73637655~~75108348 0.00000000 0.00000000 B-5 338,000.00 997.~~81360947~~07721893 0.~~73636095~~75109467 0.00000000 0.00000000 B-6 451,181.12 997.~~81360532~~07722699 0.~~63739369~~00000000 0.00000000 0.00000000 (2) Per $1,000 Denomination.

Principal Distribution Factors Statement (continued) Total Ending Ending Total Realized Principal Certificate Certificate Principal Class Loss (3) Reduction Balance Percentage Distribution A-PO 0.00000000 0.~~88493866~~92604350 ~~996~~995.~~47284793~~54682886 0.~~99647285~~99554683 0.~~88493866~~92604350 A-1 0.00000000 1011.~~74201752~~78596485 ~~975~~963.~~37331172~~58734692 0.~~97537331~~96358735 1011.~~74201752~~78596485 A-2 0.00000000 (5.~~93601353~~97063987) 1,~~023~~029.~~53829544~~50893531 1.~~02353830~~02950894 (5.~~93601353~~97063987) A-3 0.00000000 0.00000000 1,000.00000000 1.00000000 0.00000000 A-R 0.00000000 0.00000000 0.00000000 0.00000000 0.00000000 B-1 0.00000000 0.~~73637640~~75108565 ~~997~~996.~~07722143~~32613578 0.~~99707722~~99632614 0.~~73637640~~75108565 B-2 0.00000000 0.~~73637090~~75108252 ~~997~~996.~~07722272~~32613132 0.~~99707722~~99632613 0.~~73637090~~75108252 B-3 0.00000000 0.~~73637056~~75109137 ~~997~~996.~~07722081~~32612944 0.~~99707722~~99632613 0.~~73637056~~75109137 B-4 0.00000000 0.~~73637655~~75108348 ~~997~~996.~~07722913~~32612789 0.~~99707723~~99632613 0.~~73637655~~75108348 B-5 0.00000000 0.~~73636095~~75109467 ~~997~~996.~~07721893~~32612426 0.~~99707722~~99632612 0.~~73636095~~75109467 B-6 0.~~09898464~~75109526 0.~~73637833~~75109526 ~~997~~996.~~07722699~~32613173 0.~~99707723~~99632613 0.~~63739369~~00000000 (3) Amount Does Not Include Excess Special Hazard, Bankrupcy, 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-PO 409,440.81 0.0000000% ~~408~~407,~~358~~996.9865 0.00 0.00 0.00 A-1 181,951,000.00 7.0000000% ~~179~~177,~~424~~470,~~670~~149.2744 1,~~046~~035,~~643~~242.9154 0.00 0.00 A-2 13,624,600.00 7.0000000% 13,~~864~~945,~~424~~299.0586 8081,~~875~~347.8158 0.00 0.00 A-3 22,527,000.00 7.0000000% 22,527,000.00 131,407.50 0.00 0.00 A-R 100.00 7.0000000% 0.00 0.00 0.00 0.00 B-1 3,491,000.00 7.0000000% 3,~~483~~480,~~367~~796.2758 20,~~319~~304.6465 0.00 0.00 B-2 1,127,000.00 7.0000000% 1,~~124~~123,~~535~~706.9203 6,~~559~~554.7995 0.00 0.00 B-3 788,000.00 7.0000000% ~~786~~785,~~277~~696.1185 4,~~586~~583.6223 0.00 0.00 B-4 563,000.00 7.0000000% 561,~~769~~354.0648 3,~~276~~274.9957 0.00 0.00 B-5 338,000.00 7.0000000% 337,~~261~~012.0010 1,~~967~~965.3690 0.00 0.00 B-6 451,181.12 7.0000000% ~~450~~449,~~194~~862.6642 2,~~626~~624.1420 0.00 01,337.0048 Totals 225,270,321.93 1,~~298~~287,~~263~~305.7612 0.00 01,337.0048

Interest Distribution Statement (continued) Remaining Ending Non-Supported Total Unpaid Certificate/ Interest Realized Interest Interest Notional Class Shortfall Losses (4) Distribution Shortfall Balance A-PO 0.00 0.00 0.00 0.00 407,~~996~~617.6550 A-1 0.00 0.00 1,~~046~~035,~~643~~242.9154 0.00 ~~177~~175,~~470~~325,~~149~~681.4436 A-2 0.00 0.00 8081,~~875~~347.8158 0.00 1314,~~945~~026,~~299~~647.8644 A-3 0.00 0.00 131,407.50 0.00 22,527,000.00 A-R 0.00 0.00 0.00 0.00 0.00 B-1 0.00 0.00 20,~~319~~304.6465 0.00 3,~~480~~478,~~796~~174.5854 B-2 0.00 0.00 6,~~559~~554.7995 0.00 1,~~123~~122,~~706~~859.0355 B-3 0.00 0.00 4,~~586~~583.6223 0.00 785,~~696~~104.8599 B-4 0.00 0.00 3,~~276~~274.9957 0.00 ~~561~~560,~~354~~931.4861 B-5 0.00 0.00 1,~~967~~965.3690 0.00 ~~337~~336,~~012~~758.1023 B-6 0.00 0.00 21,~~626~~286.1471 01,337.0048 449,~~862~~523.4254 Totals 0.00 0.00 1,~~298~~285,~~263~~967.7663 01,337.0048 (4) Amount Does Not Include Excess Special Hazard, Bankrupcy, 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-PO 409,440.81 0.00000% ~~997~~996.~~35778659~~47284793 0.00000000 0.00000000 0.00000000 A-1 181,951,000.00 7.00000% ~~986~~975.~~11532924~~37331172 5.~~75233942~~68967766 0.00000000 0.00000000 A-2 13,624,600.00 7.00000% ~~1017~~1023.~~60228190~~53829544 5.~~93601353~~97063987 0.00000000 0.00000000 A-3 22,527,000.00 7.00000% 1000.00000000 5.83333333 0.00000000 0.00000000 A-R 100.00 7.00000% 0.00000000 0.00000000 0.00000000 0.00000000 B-1 3,491,000.00 7.00000% 997.~~81359782~~07722143 5.~~82057863~~81628473 0.00000000 0.00000000 B-2 1,127,000.00 7.00000% 997.~~81359361~~07722272 5.~~82057675~~81628217 0.00000000 0.00000000 B-3 788,000.00 7.00000% 997.~~81359137~~07722081 5.~~82058376~~81628173 0.00000000 0.00000000 B-4 563,000.00 7.00000% 997.~~81360568~~07722913 5.~~82058615~~81628774 0.00000000 0.00000000 B-5 338,000.00 7.00000% 997.~~81360947~~07721893 5.~~82059172~~81627219 0.00000000 0.00000000 B-6 451,181.12 7.00000% 997.~~81360532~~07722699 5.~~82058930~~81628948 0.00000000 02.~~00000000~~96439709 (5) Per $1,000 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-PO 0.00000000 0.00000000 0.00000000 0.00000000 ~~996~~995.~~47284793~~54682886 A-1 0.00000000 0.00000000 5.~~75233942~~68967766 0.00000000 ~~975~~963.~~37331172~~58734692 A-2 0.00000000 0.00000000 5.~~93601353~~97063987 0.00000000 ~~1023~~1029.~~53829544~~50893531 A-3 0.00000000 0.00000000 5.83333333 0.00000000 1000.00000000 A-R 0.00000000 0.00000000 0.00000000 0.00000000 0.00000000 B-1 0.00000000 0.00000000 5.~~82057863~~81628473 0.00000000 ~~997~~996.~~07722143~~32613578 B-2 0.00000000 0.00000000 5.~~82057675~~81628217 0.00000000 ~~997~~996.~~07722272~~32613132 B-3 0.00000000 0.00000000 5.~~82058376~~81628173 0.00000000 ~~997~~996.~~07722081~~32612944 B-4 0.00000000 0.00000000 5.~~82058615~~81628774 0.00000000 ~~997~~996.~~07722913~~32612789 B-5 0.00000000 0.00000000 5.~~82059172~~81627219 0.00000000 ~~997~~996.~~07721893~~32612426 B-6 0.00000000 0.00000000 52.~~82058930~~85187022 02.~~00000000~~96439709 ~~997~~996.~~07722699~~32613173 (6) Amount Does Not Include Excess Special Hazard, Bankrupcy,or Fraud Losses Unless Otherwise Disclosed. Please Refer to the Prospectus Supplement for a Full Description.

CERTIFICATEHOLDER ACCOUNT STATEMENT CERTIFICATE ACCOUNT Beginning Balance 7891,~~417~~560.2782 Deposits Payments of Interest and Principal 3,~~238~~313,~~719~~303.0878 Liquidations, Insurance Proceeds, Reserve Funds 0.00 Proceeds from Repurchased Loans 0.00 Other Amounts (Servicer Advances) 0.00 Realized Losses 0.00 Total Deposits 3,~~238~~313,~~719~~303.0878 Withdrawals Reimbursement for Servicer Advances 0.00 Payment of Service Fee 48,~~372~~870.5341 Payment of Interest and Principal 3,~~177~~354,~~203~~204.0040 Total Withdrawals (Pool Distribution Amount) 3,~~225~~403,~~575~~074.5381 Ending Balance 911,~~560~~789.8279

PREPAYMENT/CURTAILMENT INTEREST SHORTFALL Total Prepayment/Curtailment Interest Shortfall ~~1,236~~255.0181 Servicing Fee Support ~~1,236~~255.0181 Non-Supported Prepayment/Curtailment Interest Shortfall 0.00

SERVICING FEES Gross Servicing Fee 4645,~~449~~998.9433 Master Servicing Fee 3,~~158~~127.6089 Supported Prepayment/Curtailment Interest Shortfall ~~1,236~~255.0181 Net Servicing Fee 48,~~372~~870.5341

OTHER INFORMATION Current Period Realized Loss - Includes Interest Shortfall 44338.6688 Cumulative Realized Losses - Includes Interest Shortfall ~~175~~514.6351 Current Period Class A Insufficient Funds 0.00 Principal Balance of Contaminated Properties 0.00 Periodic Advance 37108,~~138~~610.9938

SUBORDINATION LEVEL/CLASS PERCENTAGE AND PREPAYMENT PERCENTAGE Current Next Original $ Original % Current $ Current % Class% Prepayment% Class A 6,758,181.12 3.00003172% 6,~~738~~733,~~428~~352.46 3.~~04783697~~07430521% 96.~~946528~~919963% 0.000000% Class B-1 3,267,181.12 1.45033802% 3,~~257~~255,~~631~~177.8892 1.~~47344903~~48624485% 1.~~577299~~591021% 51.655911% Class B-2 2,140,181.12 0.95005019% 2,~~133~~132,~~925~~318.8537 0.~~96518916~~97357112% 0.~~509200~~513630% 16.676085% Class B-3 1,352,181.12 0.60024823% 1,~~348~~347,~~229~~213.0038 0.~~60981314~~61510891% 0.~~356033~~359131% 11.659942% Class B-4 789,181.12 0.35032627% 786,~~874~~281.5277 0.~~35590869~~35899950% 0.~~254374~~256587% 8.330644% Class B-5 451,181.12 0.20028431% 449,~~862~~523.4254 0.~~20347583~~20524287% 0.~~152715~~154043% 5.001346% Class B-6 0.00 0.00000000% 0.00 0.00000000% 0.~~203852~~205626% 6.676073% Please Refer to the Prospectus Supplement for a Full Description of Loss Exposure

CREDIT ENHANCEMENT Original $ Original % Current $ Current % Bankruptcy 100,000.00 0.04439111% 100,000.00 0.~~04523068~~04565787% Fraud 4,505,406.44 2.00000000% 4,505,406.44 2.~~03782594~~05707255% Special Hazard 2,941,735.80 1.30586922% 2,941,735.80 1.~~33056709~~34313386% Limit of Subordinate's Exposure to Certain Types of Losses

COLLATERAL STATEMENT Collateral Description Fixed 30 year - Relocation Weighted Average Gross Coupon 7.~~670038~~670739% Weighted Average Pass-Through Rate 7.000000% Weighted Average Maturity(Stepdown Calculation ) ~~355~~354 Beginning Scheduled Collateral Loan Count ~~571~~567 Number Of Loans Paid In Full 4 Ending Scheduled Collateral Loan Count ~~567~~563 Beginning Scheduled Collateral Balance ~~222~~221,~~967~~088,~~858~~874.3241 Ending Scheduled Collateral Balance ~~221~~219,~~088~~020,~~874~~298.4177 Ending Actual Collateral Balance at 3031-~~Apr~~May-2001 ~~222~~220,~~224~~196,~~818~~032.8000 Monthly P &I Constant 1,~~513~~502,~~667~~381.6154 Class A Optimal Amount 3,~~132~~311,~~572~~118.2412 Class AP Deferred Amount 0.00 Ending Scheduled Balance for Premium Loans ~~198~~196,~~601~~557,~~851~~814.0827 Ending scheduled Balance For discounted Loans 22,~~487~~462,~~023~~484.3350 Scheduled Principal 166,585.30 Unscheduled Principal 1,901,990.34 Unpaid Principal Balance Of Outstanding Mortgage Loans With Original LTV: Less Than Or Equal To 80% ~~167~~165,~~591~~872,~~820~~659.3074 Greater Than 80%, less than or equal to 85% 7,~~420~~405,~~534~~438.3424 Greater than 85%, less than or equal to 95% 4645,~~065~~741,~~836~~171.2098 Greater than 95% 0.00

Filing Compare · WELLS FARGO ASSET SECURITIES CORP MOR PAS THR CER SE 2001-01