8-K 1 arc01bc4.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, 2001 AMORTIZING RESIDENTIAL COLLATERAL TRUST Mortgage Pass-Through Certificates, Series 2001-BC4 Trust (Exact name of registrant as specified in its charter) New York (governing law of 333-35026-17 Pooling and Servicing Agreement) (Commission (State or other File Number) Pending jurisdiction IRS EIN 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 December 26, 2001 a distribution was made to holders of AMORTIZING RESIDENTIAL COLLATERAL TRUST, Mortgage Pass-Through Certificates, Series 2001-BC4 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-BC4 Trust, relating to the December 26, 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. AMORTIZING RESIDENTIAL COLLATERAL TRUST Mortgage Pass-Through Certificates, Series 2001-BC4 Trust By: Wells Fargo Bank Minnesota, NA, as Trustee By: /s/ Beth Belfield, Officer By: Beth Belfield, Officer Date: 1/7/02 INDEX TO EXHIBITS Exhibit Number Description EX-99.1 Monthly report distributed to holders of Mortgage Pass-Through Certificates, Series 2001-BC4 Trust, relating to the December 26, 2001 distribution. EX-99.1

Amortizing Residential Collateral Mortgage Trust Mortgage Pass-Through Certificates Record Date: 1011/3130/01 Distribution Date: 1112/26/01 ARC Series: 2001-BC4 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 86358RCY1 SEQ 2.~~53000~~21000% ~~308~~296,~~055~~079,~~804~~324.7822 ~~692~~545,~~783~~279.2842 118,~~976~~214,~~480~~872.5637 A-2 86358RCZ8 SEQ 2.~~68000~~36000% 9493,~~137~~068,~~027~~969.4850 ~~224~~183,~~255~~035.3264 12,~~068~~166,~~057~~456.9872 A-IO 86358RDA2 IO 6.00000% 0.00 ~~632~~562,~~591~~303.1020 0.00 M-1 86358RDB0 SEQ 32.~~01000~~69000% 14,058,000.00 3731,~~612~~513.9635 0.00 M-2 86358RDC8 SEQ 3.~~42000~~10000% 9,372,000.00 2824,~~490~~211.8800 0.00 B 86358RDD6 SEQ 4.~~32000~~00000% 5,858,000.00 2219,~~494~~526.7267 0.00 X ARC01001X SEQ 0.00000% 0.00 1,~~601~~761,~~965~~409.2347 0.00 P ARC01001P SEQ 0.00000% 0.00 ~~256~~277,~~217~~562.2677 0.00 R-1 ARC0101R1 RES 0.00000% 0.00 0.00 0.00 R-2 ARC0101R2 RES 0.00000% 0.00 0.00 0.00 R-3 ARC0101R3 RES 0.00000% 0.00 0.00 0.00 Totals ~~431~~418,~~480~~436,~~832~~293.2672 3,~~496~~404,~~410~~841.7552 1310,~~044~~381,~~538~~329.5409

Certificateholder Distribution Summary (continued) Current Ending Cumulative Realized Certificate Total Realized Class Loss Balance Distribution Losses A-1 0.00 ~~296~~287,~~079~~864,~~324~~451.2285 128,~~669~~760,~~263~~151.8479 0.00 A-2 0.00 9390,~~068~~902,~~969~~512.5078 12,~~292~~349,~~313~~492.3036 0.00 A-IO 0.00 0.00 ~~632~~562,~~591~~303.1020 0.00 M-1 0.00 14,058,000.00 3731,~~612~~513.9635 0.00 M-2 0.00 9,372,000.00 2824,~~490~~211.8800 0.00 B 0.00 5,858,000.00 2219,~~494~~526.7267 0.00 X 0.00 0.00 1,~~601~~761,~~965~~409.2347 0.00 P 0.00 0.00 ~~256~~277,~~217~~562.2677 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 Totals 0.00 ~~418~~408,~~436~~054,~~293~~964.7263 1613,~~540~~786,~~949~~170.2961 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-1 334,986,000.00 ~~308~~296,~~055~~079,~~804~~324.7822 0.00 118,~~976~~214,~~480~~872.5637 0.00 0.00 A-2 104,312,000.00 9493,~~137~~068,~~027~~969.4850 0.00 12,~~068~~166,~~057~~456.9872 0.00 0.00 A-IO 0.00 0.00 0.00 0.00 0.00 0.00 M-1 14,058,000.00 14,058,000.00 0.00 0.00 0.00 0.00 M-2 9,372,000.00 9,372,000.00 0.00 0.00 0.00 0.00 B 5,858,000.00 5,858,000.00 0.00 0.00 0.00 0.00 X 826.33 0.00 0.00 0.00 0.00 0.00 P 0.00 0.00 0.00 0.00 0.00 0.00 R-1 0.00 0.00 0.00 0.00 0.00 0.00 R-2 0.00 0.00 0.00 0.00 0.00 0.00 R-3 0.00 0.00 0.00 0.00 0.00 0.00 Totals 468,586,826.33 ~~431~~418,~~480~~436,~~832~~293.2672 0.00 1310,~~044~~381,~~538~~329.5409 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-1 118,~~976~~214,~~480~~872.5637 ~~296~~287,~~079~~864,~~324~~451.2285 0.~~88385582~~85933278 118,~~976~~214,~~480~~872.5637 A-2 12,~~068~~166,~~057~~456.9872 9390,~~068~~902,~~969~~512.5078 0.~~89221729~~87144828 12,~~068~~166,~~057~~456.9872 A-IO 0.00 0.00 0.00000000 0.00 M-1 0.00 14,058,000.00 1.00000000 0.00 M-2 0.00 9,372,000.00 1.00000000 0.00 B 0.00 5,858,000.00 1.00000000 0.00 X 0.00 0.00 0.00000000 0.00 P 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 Totals 1310,~~044~~381,~~538~~329.5409 ~~418~~408,~~436~~054,~~293~~964.7263 0.~~89297494~~87082039 1310,~~044~~381,~~538~~329.5409

Principal Distribution Factors Statement Original Beginning Scheduled Unscheduled Face Certificate Principal Principal Class (2) Amount Balance Distribution Distribution Accretion A-1 334,986,000.00 ~~919~~883.~~60799789~~85581553 0.00000000 3524.~~75218236~~52303192 0.00000000 A-2 104,312,000.00 ~~902~~892.~~45635670~~21728564 0.00000000 1020.~~23907106~~76900759 0.00000000 A-IO 0.00 0.00000000 0.00000000 0.00000000 0.00000000 M-1 14,058,000.00 1000.00000000 0.00000000 0.00000000 0.00000000 M-2 9,372,000.00 1000.00000000 0.00000000 0.00000000 0.00000000 B 5,858,000.00 1000.00000000 0.00000000 0.00000000 0.00000000 X 826.33 0.00000000 0.00000000 0.00000000 0.00000000 P 0.00 0.00000000 0.00000000 0.00000000 0.00000000 R-1 0.00 0.00000000 0.00000000 0.00000000 0.00000000 R-2 0.00 0.00000000 0.00000000 0.00000000 0.00000000 R-3 0.00 0.00000000 0.00000000 0.00000000 0.00000000 (2) All Classes are 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-1 0.00000000 3524.~~75218236~~52303192 ~~883~~859.~~85581553~~33278361 0.~~88385582~~85933278 3524.~~75218236~~52303192 A-2 0.00000000 1020.~~23907106~~76900759 ~~892~~871.~~21728564~~44827805 0.~~89221729~~87144828 1020.~~23907106~~76900759 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 X 0.00000000 0.00000000 0.00000000 0.00000000 0.00000000 P 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 (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-1 334,986,000.00 2.~~53000~~21000% ~~308~~296,~~055~~079,~~804~~324.7822 ~~692~~545,~~783~~279.2842 0.00 0.00 A-2 104,312,000.00 2.~~68000~~36000% 9493,~~137~~068,~~027~~969.4850 ~~224~~183,~~255~~035.3264 0.00 0.00 A-IO 0.00 6.00000% ~~126~~112,~~518~~460,~~220~~640.00 ~~632~~562,~~591~~303.1020 0.00 0.00 M-1 14,058,000.00 32.~~01000~~69000% 14,058,000.00 3731,~~612~~513.9635 0.00 0.00 M-2 9,372,000.00 3.~~42000~~10000% 9,372,000.00 2824,~~490~~211.8800 0.00 0.00 B 5,858,000.00 4.~~32000~~00000% 5,858,000.00 2219,~~494~~526.7267 0.00 0.00 X 826.33 0.00000% 0.00 0.00 0.00 0.00 P 0.00 0.00000% 0.00 0.00 0.00 0.00 R-1 0.00 0.00000% 0.00 0.00 0.00 0.00 R-2 0.00 0.00000% 0.00 0.00 0.00 0.00 R-3 0.00 0.00000% 0.00 0.00 0.00 0.00 Totals 468,586,826.33 1,~~638~~365,~~228~~869.2628 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 0.00 0.00 ~~692~~545,~~783~~279.2842 0.00 ~~296~~287,~~079~~864,~~324~~451.2285 A-2 0.00 0.00 ~~224~~183,~~255~~035.3264 0.00 9390,~~068~~902,~~969~~512.5078 A-IO 0.00 0.00 ~~632~~562,~~591~~303.1020 0.00 112,460,640.00 M-1 0.00 0.00 3731,~~612~~513.9635 0.00 14,058,000.00 M-2 0.00 0.00 2824,~~490~~211.8800 0.00 9,372,000.00 B 0.00 0.00 2219,~~494~~526.7267 0.00 5,858,000.00 X 0.00 0.00 1,~~601~~761,~~965~~409.2347 0.00 0.00 P 0.00 0.00 ~~256~~277,~~217~~562.2677 0.00 0.00 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 Totals 0.00 0.00 3,~~496~~404,~~410~~841.7552 0.00 (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-1 334,986,000.00 2.~~53000~~21000% ~~919~~883.~~60799789~~85581553 21.~~06809622~~62776779 0.00000000 0.00000000 A-2 104,312,000.00 2.~~68000~~36000% ~~902~~892.~~45635670~~21728564 21.~~14985160~~75469399 0.00000000 0.00000000 A-IO 0.00 6.00000% 1000.00000000 5.00000000 0.00000000 0.00000000 M-1 14,058,000.00 32.~~01000~~69000% 1000.00000000 2.~~67555556~~24166667 0.00000000 0.00000000 M-2 9,372,000.00 3.~~42000~~10000% 1000.00000000 32.~~04000000~~58333333 0.00000000 0.00000000 B 5,858,000.00 4.~~32000~~00000% 1000.00000000 3.~~84000000~~33333390 0.00000000 0.00000000 X 826.33 0.00000% 0.00000000 0.00000000 0.00000000 0.00000000 P 0.00 0.00000% 0.00000000 0.00000000 0.00000000 0.00000000 R-1 0.00 0.00000% 0.00000000 0.00000000 0.00000000 0.00000000 R-2 0.00 0.00000% 0.00000000 0.00000000 0.00000000 0.00000000 R-3 0.00 0.00000% 0.00000000 0.00000000 0.00000000 0.00000000 (5) All Classes are 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-1 0.00000000 0.00000000 21.~~06809622~~62776779 0.00000000 ~~883~~859.~~85581553~~33278361 A-2 0.00000000 0.00000000 21.~~14985160~~75469399 0.00000000 ~~892~~871.~~21728564~~44827805 A-IO 0.00000000 0.00000000 5.00000000 0.00000000 ~~888~~1000.~~88888889~~00000000 M-1 0.00000000 0.00000000 2.~~67555556~~24166667 0.00000000 1000.00000000 M-2 0.00000000 0.00000000 32.~~04000000~~58333333 0.00000000 1000.00000000 B 0.00000000 0.00000000 3.~~84000000~~33333390 0.00000000 1000.00000000 X 0.00000000 0.00000000 ~~1938650~~2131605.~~69645299~~37557634 0.00000000 0.00000000 P 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 (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~~Certificateholder ~~ACCOUNT~~Component ~~STATEMENT~~Statement ~~CERTIFICATE~~Component ~~ACCOUNT~~ Beginning ~~Balance~~Ending ~~0.00~~Beginning ~~Deposits~~Ending ~~Payments~~Ending ofPass-Through ~~Interest~~Notional ~~and~~Notional ~~Principal~~Component ~~16,858,519.48~~Component ~~Liquidations,~~Component ~~Insurance~~Class ~~Proceeds,~~Rate ~~Reserve~~Balance ~~Funds~~Balance ~~0.00~~Balance ~~Proceeds~~Balance ~~from~~Percentage ~~Repurchased~~FHLMC ~~Loans~~0.09000% 0.00 ~~Other~~0.00 ~~Amounts~~0.00 ~~(Servicer Advances)~~ 0.00 ~~Realized~~0.00000000% ~~Losses~~ADVISOR ~~(19,444~~0.~~80)~~01500% ~~Prepayment Penalties 256~~418,~~217~~436,293.2672 ~~Total Deposits 17~~408,~~095~~054,~~291~~964.9463 ~~Withdrawals~~0.00 ~~Reimbursement for Servicer Advances~~ 0.00 ~~Payment~~87.08203938% ofFHLMC ~~Service~~R ~~Fee~~0.00000% ~~554,342~~0.6500 ~~Payment of Interest and Principal 16,540,949~~0.2900 ~~Total Withdrawals (Pool Distribution Amount) 17,095,291~~0.9400 ~~Ending Balance~~ 0.00 0.00000000%

SERVICING FEES Gross Servicing Fee ~~179~~174,~~783~~348.4358 Guarantee Fee 2322,~~874~~205.3295 Loss Mitigation ~~Advisors~~Advisor Fee 5,~~393~~230.5145 MGIC Insurance Premiums ~~344~~334,~~392~~049.4538 Wells Fargo Bank, N.A. ~~898~~871.9479 Supported Prepayment/Curtailment Interest Shortfall 0.00 Net Servicing Fee ~~554~~536,~~342~~706.6515

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 1719 0 0 1719 12,~~948~~266,~~404~~366.8594 0.00 0.00 12,~~948~~266,~~404~~366.8594 30 Days ~~181~~163 71 0 0 ~~188~~164 2118,~~648~~876,~~556~~313.4047 ~~591~~39,~~421~~647.9227 0.00 0.00 2218,~~239~~915,~~978~~960.3274 60 Days 4289 45 5 0 5199 512,~~345~~308,~~853~~796.3851 ~~368~~487,~~230~~148.4122 ~~537~~479,~~303~~419.2584 0.00 613,~~251~~275,~~387~~364.0457 90 Days 924 62 298 0 4434 13,~~601~~091,~~242~~437.2173 ~~823~~188,~~848~~916.5290 31,~~381~~149,~~055~~846.7182 0.00 54,~~806~~430,~~146~~201.4445 120 Days 52 69 3630 20 4941 ~~573~~178,~~528~~889.4109 ~~511~~1,~~654~~021,603.2293 3,~~352~~976,~~745~~306.2982 ~~110,457~~0.8800 45,~~548~~176,~~385~~799.8084 150 Days 23 67 32 12 4144 ~~188~~399,~~736~~442.0242 ~~795~~943,~~470~~321.2761 23,~~934~~051,~~555~~850.5999 83110,~~736~~426.25 4,~~002~~505,~~498~~041.1327 180+ Days 36 1119 3760 69 5794 ~~679~~911,~~263~~727.5383 12,~~594~~193,~~208~~373.58 35,~~488~~576,~~654~~838.8712 ~~370~~562,~~116~~653.9245 69,~~132~~244,~~243~~592.9098 Totals ~~242~~287 5762 ~~139~~135 911 ~~447~~495 3035,~~037~~766,~~179~~607.9505 67,~~633~~140,~~238~~378.7745 1314,~~694~~234,~~314~~262.7159 ~~564~~673,~~311~~079.0570 5057,~~929~~814,~~044~~327.4879 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.~~527132~~603366% 0.000000% 0.000000% 0.~~527132~~603366% 0.~~465640~~555407% 0.000000% 0.000000% 0.~~465640~~555407% 30 Days 5.~~612403~~176246% 0.~~217054~~031756% 0.000000% 0.000000% 5.~~829457~~208003% 54.~~173680~~625924% 0.~~141341~~009716% 0.000000% 0.000000% 54.~~315021~~635640% 60 Days 12.~~302326~~826294% 0.~~124031~~158781% 0.~~155039~~158781% 0.000000% 13.~~581395~~143855% 13.~~277579~~016456% 0.~~088002~~119383% 0.~~128407~~117489% 0.000000% 13.~~493988~~253328% 90 Days 0.~~279070~~762147% 0.~~186047~~063512% 0.~~899225~~254049% 0.000000% 1.~~364341~~079708% 0.~~382673~~757603% 0.~~196887~~046297% 0.~~808022~~281787% 0.000000% 1.~~387582~~085687% 120 Days 0.~~155039~~063512% 0.~~186047~~285805% 10.~~116279~~952683% 0.~~062016~~000000% 1.~~519380~~302001% 0.~~137065~~043839% 0.~~122278~~250359% 0.~~801256~~974454% 0.~~026398~~000000% 1.~~086996~~268653% 150 Days 0.~~062016~~095268% 0.~~186047~~222293% 01.~~992248~~016196% 0.~~031008~~063512% 1.~~271318~~397269% 0.~~045105~~097889% 0.~~190105~~231175% 0.~~701315~~747902% 0.~~020012~~027062% 01.~~956537~~104028% 180+ Days 0.~~093023~~190537% 0.~~341085~~603366% 1.~~147287~~905367% 0.~~186047~~285805% 12.~~767442~~985075% 0.~~162334~~223433% 0.~~380992~~537519% 01.~~833736~~366688% 0.~~088452~~137887% 12.~~465514~~265526% Totals 79.~~503876~~114004% 1.~~767442~~968879% 4.~~310078~~287075% 0.~~279070~~349317% 1315.~~860465~~719276% 78.~~178436~~765144% 1.~~585245~~749857% 3.~~272736~~488320% 0.~~134862~~164948% 1214.~~171278~~168270%

Delinquency Status By Groups

~~Delinquency Status By Groups~~ DELINQUENT BANKRUPTCY FORECLOSURE REO Total 1 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 2 0 0 2 135,~~351~~301.6608 0.00 0.00 135,~~351~~301.6608 30 Days 1615 0 0 0 1615 1885,~~163,506~~339.7084 0.00 0.00 0.00 1885,~~163,506~~339.7084 60 Days 73 0 02 0 75 ~~517~~506,~~571~~319.4629 0.00 0159,767.0016 0.00 ~~517~~666,~~571~~086.4645 90 Days 13 0 1 2 0 4 ~~159~~145,~~477~~739.3891 ~~63,596~~0.8600 ~~148~~72,~~129~~429.2034 0.00 ~~371~~218,~~203~~169.4425 120 Days 0 0 63 0 63 0.00 0.00 ~~315~~314,~~577~~753.6447 0.00 ~~315~~314,~~577~~753.6447 150 Days 0 10 46 0 56 0.00 ~~112,220~~0.5500 ~~192~~315,~~181~~496.3024 0.00 ~~304~~315,~~401~~496.8524 180 Days 0 0 1 5 0 16 0.00 0112,193.0032 ~~160~~352,~~561~~500.9364 0.00 ~~160~~464,~~561~~693.9396 Totals 2421 43 1317 0 41 1,~~840~~537,~~555~~399.5404 ~~311~~247,~~169~~494.0740 ~~816~~1,~~450~~214,946.0785 0.00 2,~~968~~999,~~174~~840.6829 0-29 Days 0.~~626959~~643087% 0.000000% 0.000000% 0.~~626959~~643087% 0.~~542150~~554882% 0.000000% 0.000000% 0.~~542150~~554882% 30 Days 54.~~015674~~823151% 0.000000% 0.000000% 0.000000% 54.~~015674~~823151% 43.~~660416~~630858% 0.000000% 0.000000% 0.000000% 43.~~660416~~630858% 60 Days 20.~~194357~~964630% 0.000000% 0.~~000000~~643087% 0.000000% 21.~~194357~~607717% 2.~~073128~~076461% 0.000000% 0.~~000000~~655219% 0.000000% 2.~~073128~~731680% 90 Days 0.~~313480~~964630% 0.~~313480~~000000% 0.~~626959~~321543% 0.000000% 1.~~253918~~286174% 0.~~638785~~597692% 0.~~254737~~000000% 0.~~593330~~297039% 0.000000% 10.~~486852~~894732% 120 Days 0.000000% 0.000000% 10.~~880878~~964630% 0.000000% 10.~~880878~~964630% 0.000000% 0.000000% 1.~~264044~~290832% 0.000000% 1.~~264044~~290832% 150 Days 0.000000% 0.~~313480~~000000% 1.~~253918~~929260% 0.000000% 1.~~567398~~929260% 0.000000% 0.~~449498~~000000% 01.~~769781~~293878% 0.000000% 1.~~219279~~293878% 180 Days 0.000000% 0.~~000000~~321543% 01.~~313480~~607717% 0.000000% 01.~~313480~~929260% 0.000000% 0.~~000000~~460115% 01.~~643129~~445637% 0.000000% 01.~~643129~~905751% Totals 76.~~523511~~752412% 10.~~253918~~964630% 45.~~075235~~466238% 0.000000% 1213.~~852665~~183280% 76.~~372329~~305011% 1.~~246385~~014997% 34.~~270284~~982606% 0.000000% 1112.~~888998~~302613% DELINQUENT BANKRUPTCY FORECLOSURE REO Total 2 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 1416 0 0 1416 1,~~504~~822,~~605~~773.1061 0.00 0.00 1,~~504~~822,~~605~~773.1061 30 Days ~~143~~135 71 0 0 ~~150~~136 14,~~394~~255,~~135~~463.1288 ~~591~~39,~~421~~647.9227 0.00 0.00 14,~~985~~295,~~557~~111.0415 60 Days 2869 4 5 3 0 3777 26,~~285~~782,~~356~~515.7450 ~~368~~487,~~230~~148.4122 ~~537~~319,~~303~~652.2568 0.00 37,~~190~~589,~~890~~316.40 90 Days 516 32 245 0 3223 ~~508~~1,~~602~~413,077.3673 ~~272~~188,~~638~~916.9290 2460,~~252,753~~500.4476 0.00 32,~~033~~062,~~994~~495.7239 120 Days 52 6 2423 20 3731 ~~573~~178,~~528~~889.4109 ~~511~~465,~~654~~742.2223 2,~~324~~155,~~227~~574.4404 ~~110,457~~0.8800 32,~~519~~800,~~867~~205.9536 150 Days 1 3 246 120 292 8531 399,~~262~~442.0842 ~~178~~507,~~617~~339.9891 12,~~914~~023,~~602~~686.0805 83110,~~736~~426.25 23,~~262~~040,~~218~~894.3963 180 Days 03 711 1736 35 2755 0470,362.0063 ~~752~~925,~~682~~452.7834 12,~~406~~777,~~064~~114.8201 ~~149~~312,~~724~~433.3300 24,~~308~~485,~~471~~361.9398 Totals ~~182~~228 4447 9487 67 ~~326~~369 1723,~~846~~499,~~884~~751.7125 4,~~179~~437,~~851~~020.3348 87,~~434~~736,~~951~~527.0354 ~~343~~422,~~918~~859.4625 3036,~~805~~096,~~605~~158.5352 0-29 Days 0.~~543267~~636183% 0.000000% 0.000000% 0.~~543267~~636183% 0.~~512734~~637747% 0.000000% 0.000000% 0.~~512734~~637747% 30 Days 5.~~549088~~367793% 0.~~271634~~039761% 0.000000% 0.000000% 5.~~820722~~407555% 4.~~905186~~987665% 0.~~201543~~013872% 0.000000% 0.000000% 5.~~106729~~001537% 60 Days 12.~~086535~~743539% 0.~~155219~~198807% 0.~~194024~~119284% 0.000000% 13.~~435778~~061630% 02.~~778796~~373049% 0.~~125484~~170442% 0.~~183100~~111839% 0.000000% 12.~~087381~~655330% 90 Days 0.~~194024~~636183% 0.~~116414~~079523% 0.~~931315~~198807% 0.000000% 10.~~241754~~914513% 0.~~173320~~494404% 0.~~092909~~066098% 0.~~767686~~161119% 0.000000% 10.~~033915~~721621% 120 Days 0.~~194024~~079523% 0.~~232829~~238569% 0.~~931315~~914513% 0.~~077610~~000000% 1.~~435778~~232604% 0.~~195445~~062589% 0.~~174360~~162953% 0.~~792043~~754187% 0.~~037641~~000000% 10.~~199489~~979729% 150 Days 0.~~038805~~119284% 0.~~116414~~238569% 0.~~931315~~795229% 0.~~038805~~079523% 1.~~125340~~232604% 0.~~029055~~139756% 0.~~060869~~177507% 0.~~652452~~708042% 0.~~028535~~038636% 01.~~770911~~063940% 180 Days 0.~~000000~~119284% 0.~~271634~~437376% 01.~~659682~~431412% 0.~~116414~~198807% 12.~~047730~~186879% 0.~~000000~~164569% 0.~~256497~~323795% 0.~~479154~~971649% 0.~~051023~~109313% 01.~~786673~~569327% Totals 79.~~062476~~065606% 1.~~707412~~868787% 3.~~647652~~459245% 0.~~232829~~278330% 1214.~~650369~~671968% 68.~~081802~~222032% 1.~~424396~~552413% 2.~~874435~~706836% 0.~~117199~~147949% 1012.~~497833~~629231% DELINQUENT BANKRUPTCY FORECLOSURE REO Total 3 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 20 0 0 0 20 ~~201,410~~0.3000 0.00 0.00 0.00 ~~201,410~~0.3000 60 Days 02 0 0 0 02 0201,331.0058 0.00 0.00 0.00 0201,331.0058 90 Days 0 10 10 0 20 0.00 ~~204,516~~0.7300 ~~360,127~~0.1800 0.00 ~~564,643~~0.9100 120 Days 0 0 2 1 0 23 0.00 0272,901.0047 90359,~~466~~981.5911 0.00 90632,~~466~~882.5958 150 Days 0 10 12 0 2 0.00 ~~68,486~~0.2300 2390,~~786~~442.3881 0.00 9290,~~272~~442.6181 180 Days 0 01 3 0 34 0.00 033,125.0093 ~~125~~116,~~538~~095.5011 0.00 ~~125~~149,~~538~~221.5004 Totals 2 23 76 0 11 201,~~410~~331.3058 ~~273~~306,~~002~~027.9640 ~~599~~566,~~918~~519.6503 0.00 1,~~074~~073,~~331~~878.9101 0-29 Days 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 30 Days 50.~~714286~~000000% 0.000000% 0.000000% 0.000000% 50.~~714286~~000000% 30.~~438992~~000000% 0.000000% 0.000000% 0.000000% 30.~~438992~~000000% 60 Days 05.~~000000~~714286% 0.000000% 0.000000% 0.000000% 05.~~000000~~714286% 03.~~000000~~439371% 0.000000% 0.000000% 0.000000% 03.~~000000~~439371% 90 Days 0.000000% 20.~~857143~~000000% 20.~~857143~~000000% 0.000000% 50.~~714286~~000000% 0.000000% 30.~~492032~~000000% 60.~~149012~~000000% 0.000000% 90.~~641044~~000000% 120 Days 0.000000% 05.~~000000~~714286% 52.~~714286~~857143% 0.000000% 58.~~714286~~571429% 0.000000% 04.~~000000~~662008% 16.~~544677~~149600% 0.000000% 110.~~544677~~811608% 150 Days 0.000000% 20.~~857143~~000000% 25.~~857143~~714286% 0.000000% 5.714286% 0.000000% 10.~~169372~~000000% 01.~~406142~~545045% 0.000000% 1.~~575514~~545045% 180 Days 0.000000% 02.~~000000~~857143% 8.571429% 0.000000% 811.~~571429~~428571% 0.000000% 0.~~000000~~565894% 21.~~143514~~983266% 0.000000% 2.~~143514~~549161% Totals 5.714286% 58.~~714286~~571429% 2017.~~000000~~142857% 0.000000% 31.428571% 3.~~438992~~439371% 45.~~661404~~227902% 109.~~243345~~677911% 0.000000% 18.~~343741~~345184% DELINQUENT BANKRUPTCY FORECLOSURE REO Total 4 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 1 0 0 1 308,~~448~~292.0925 0.00 0.00 308,~~448~~292.0925 30 Days 2013 0 0 0 2013 53,~~889~~735,~~504~~509.2875 0.00 0.00 0.00 53,~~889~~735,~~504~~509.2875 60 Days 715 0 0 0 715 24,~~542~~818,~~925~~630.1814 0.00 0.00 0.00 24,~~542~~818,~~925~~630.1814 90 Days 35 10 2 0 67 ~~933~~1,~~162~~532,620.4709 ~~283,096~~0.0100 ~~620~~616,~~045~~916.8972 0.00 12,~~836~~149,~~304~~536.3781 120 Days 0 01 43 0 4 0.00 0282,960.0023 ~~622~~1,~~473~~145,998.6220 0.00 ~~622~~1,~~473~~428,958.6243 150 Days 10 1 34 0 5 ~~103,473~~0.9400 ~~436~~435,~~145~~981.5170 ~~803~~622,~~985~~225.8389 0.00 1,~~343~~058,~~605~~207.2859 180 Days 3 46 16 34 2629 ~~679~~441,~~263~~365.5320 ~~841~~1,~~525~~122,601.8099 12,~~796~~331,~~489~~128.6236 ~~220~~250,~~392~~220.5945 34,~~537~~145,~~671~~316.5400 Totals 3436 79 25 34 6974 10,~~148~~528,~~329~~125.4018 12,~~869~~149,~~215~~836.4117 34,~~842~~716,~~994~~269.9617 ~~220~~250,~~392~~220.5945 1617,~~080~~644,~~932~~450.3697 0-29 Days 0.~~340136~~347222% 0.000000% 0.000000% 0.~~340136~~347222% 0.~~327556~~335089% 0.000000% 0.000000% 0.~~327556~~335089% 30 Days 64.~~802721~~513889% 0.000000% 0.000000% 0.000000% 64.~~802721~~513889% 64.~~254345~~060201% 0.000000% 0.000000% 0.000000% 64.~~254345~~060201% 60 Days 25.~~380952~~208333% 0.000000% 0.000000% 0.000000% 25.~~380952~~208333% 25.~~700453~~237466% 0.000000% 0.000000% 0.000000% 25.~~700453~~237466% 90 Days 1.~~020408~~736111% 0.~~340136~~000000% 0.~~680272~~694444% 0.000000% 2.~~040816~~430556% 01.~~990970~~665836% 0.~~300633~~000000% 0.~~658456~~670539% 0.000000% 12.~~950059~~336375% 120 Days 0.000000% 0.~~000000~~347222% 1.~~360544~~041667% 0.000000% 1.~~360544~~388889% 0.000000% 0.~~000000~~307555% 01.~~661034~~245608% 0.000000% 01.~~661034~~553164% 150 Days 0.~~340136~~000000% 0.~~340136~~347222% 1.~~020408~~388889% 0.000000% 1.~~700680~~736111% 0.~~109884~~000000% 0.~~463164~~473877% 0.~~853791~~676310% 0.000000% 1.~~426838~~150187% 180 Days 1.~~020408~~041667% 12.~~360544~~083333% 5.~~442177~~555556% 1.~~020408~~388889% 810.~~843537~~069444% 0.~~721342~~479729% 01.~~893656~~220179% 12.~~907778~~533750% 0.~~234045~~271970% 34.~~756822~~505627% Totals 1112.~~564626~~500000% 23.~~380952~~125000% 8.~~503401~~680556% 1.~~020408~~388889% 2325.~~469388~~694444% 1011.~~776994~~443231% 12.~~985009~~336700% 45.~~081059~~126208% 0.~~234045~~271970% 1719.~~077107~~178108% 7) Delinquencies include wrapped and unwrapped loans.

COLLATERAL STATEMENT Collateral Description Fixed & Mixed ARM Weighted Average Gross Coupon 10.~~607140~~596567% Weighted Average Net Coupon 9.~~149343~~138574% Weighted Average Pass-Through Rate 9.~~146843~~136074% Weighted Average Maturity(Stepdown Calculation ) ~~348~~347 Beginning Scheduled Collateral Loan Count 3,~~325~~225 Number Of Loans Paid In Full ~~100~~76 Ending Scheduled Collateral Loan Count 3,~~225~~149 Beginning Scheduled Collateral Balance ~~431~~418,~~480~~436,~~832~~293.2672 Ending Scheduled Collateral Balance ~~418~~408,~~436~~054,~~293~~964.7263 Ending Actual Collateral Balance at 3130-~~Oct~~Nov-2001 ~~418~~408,~~436~~054,~~293~~964.7263 Monthly P &I Constant 43,~~011~~888,~~704~~993.9560 Special Servicing Fee 0.00 Prepayment Penalties ~~256~~277,~~217~~562.2677 Realized Loss Amount 1931,~~444~~005.8056 Cumulative Realized Loss 1950,~~444~~450.8036 Ending Scheduled Balance for Premium Loans ~~418~~408,~~436~~054,~~293~~964.7263 Scheduled Principal ~~197~~194,~~723~~003.7926 Unscheduled Principal 1210,~~846~~187,~~814~~325.7583 Extra principal distribution Amount 0.00 Excess Cash Amount 1,~~625~~783,~~839~~615.5542

~~Cumulative~~Group ~~Guarantee~~Level Collateral Statement Group 1 2 3 Collateral Description Fixed 15/30 & ARM Fixed 15/30 & ARM Fixed 15/30 & ARM Weighted Average Coupon Rate 11.344333 10.722371 10.288040 Weighted Average Net Rate 9.932198 9.261094 8.983431 Weighted Average Maturity 345 345 347 Beginning Loan Count 319 2,577 35 Loans Paid In Full 8 62 0 Ending Loan Count 311 2,515 35 Beginning Scheduled Balance 24,965,726.22 293,447,294.37 5,856,667.56 Ending scheduled Balance 24,383,765.60 285,814,382.62 5,853,732.43 Record Date 11/30/2001 11/30/2001 11/30/2001 Principal And Interest Constant 250,332.14 2,751,816.22 53,146.49 Scheduled Principal 14,315.88 129,773.81 2,935.13 Unscheduled Principal 567,644.74 7,503,137.94 0.00 Scheduled Interest 236,016.26 2,622,042.41 50,211.36 Servicing Fees 29,379.14 357,340.01 6,367.22 Master Servicing Fees 0.00 0.00 0.00 Trustee Fee ~~$128~~52.03 611.37 12.20 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 206,~~249~~585.9009 2,264,091.03 43,831.94 Realized Loss Amount 0.00 31,005.56 0.00 Cumulative Realized Loss 0.00 50,450.36 0.00 Percentage of Cumulative Losses 0.00 0.00 0.00 Prepayment Penalties 0.00 0.00 0.00 Special Servicing Fee 0.00 0.00 0.00 Pass-Through Rate 9.929697 9.258594 8.980930

Group Level Collateral Statement Group 14 2Total 3 Collateral Description Fixed 15/30 & ARM Fixed ~~15/30~~ & ~~ARM~~Mixed ~~Fixed 15/30 &~~ ARM Weighted Average Coupon Rate ~~11.303102~~ 10.~~732304~~025469 10.~~287917~~596567 Weighted Average Net Rate 98.~~891204~~556011 9.~~271173~~138574 ~~8.983334~~ Weighted Average Maturity ~~346~~347 ~~346~~347 ~~348~~ Beginning Loan Count ~~327~~294 23,~~664~~225 35 Loans Paid In Full 86 8776 0 Ending Loan Count ~~319~~288 23,~~577~~149 35 Beginning Scheduled Balance 2594,~~933~~166,~~762~~605.6057 ~~304~~418,~~455~~436,~~738~~293.5572 ~~5,859,644.35~~ Ending scheduled Balance 2492,~~965~~003,~~726~~083.2298 ~~293~~408,~~447~~054,~~294~~964.3763 ~~5,856,667.56~~ Record Date 1011/3130/2001 1011/3130/2001 ~~10/31/2001~~ Principal And Interest Constant ~~259~~833,~~303~~698.4675 23,~~855~~888,~~791~~993.6760 ~~53,146.49~~ Scheduled Principal 1546,~~026~~978.8344 ~~132~~194,~~865~~003.3026 ~~2,910.21~~ Unscheduled Principal ~~953~~2,~~009~~116,543.5515 10,~~875~~187,~~578~~325.8883 ~~66.58~~ Scheduled Interest ~~244~~786,~~276~~720.6331 23,~~722~~694,~~926~~990.3734 ~~50,236.28~~ Servicing Fees 30115,~~513~~311.1955 ~~370~~508,~~708~~397.3092 ~~6,370.33~~ Master Servicing Fees 0.00 0.00 ~~0.00~~ Trustee Fee 54196.0519 ~~634~~871.2879 ~~12.20~~ 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 ~~213~~671,~~709~~212.3957 23,~~351~~185,~~583~~720.7963 ~~43,853.75~~ Realized Loss Amount 0.00 1931,~~444~~005.8056 ~~0.00~~ Cumulative Realized Loss 0.00 1950,~~444~~450.8036 ~~0.00~~ Percentage of Cumulative Losses 0.00 0.00 ~~0.00~~ Prepayment Penalties 0.00 0.00 ~~0.00~~ Special Servicing Fee 0.00 0.00 ~~0.00~~ Pass-Through Rate 98.~~888703~~553511 9.~~268673 8.980832~~136074

Group Level Collateral Statement Group 4 Total Collateral Description Fixed 15/30 & ARM Fixed & Mixed ARM Weighted Average Coupon Rate 10.037103 10.607140 Weighted Average Net Rate 8.568042 9.149343 Weighted Average Maturity 348 348 Beginning Loan Count 299 3,325 Loans Paid In Full 5 100 Ending Loan Count 294 3,225 Beginning Scheduled Balance 95,231,686.76 431,480,832.26 Ending scheduled Balance 94,166,605.57 418,436,293.72 Record Date 10/31/2001 10/31/2001 Principal And Interest Constant 843,463.33 4,011,704.95 Scheduled Principal 46,921.45 197,723.79 Unscheduled Principal 1,018,159.74 12,846,814.75 Scheduled Interest 796,541.88 3,813,981.16 Servicing Fees 116,584.28 524,176.10 Master Servicing Fees 0.00 0.00 Trustee Fee 198.41 898.94 FRY Amount 0.00 0.00 Special Hazard Fee 0.00 0.00 Other Fee 0.00 0.00 Pool Insurance Fee 0.00 0.00 Spread Fee 1 0.00 0.00 Spread Fee 2 0.00 0.00 Spread Fee 3 0.00 0.00 Net Interest 679,759.19 3,288,906.12 Realized Loss Amount 0.00 19,444.80 Cumulative Realized Loss 0.00 19,444.80 Percentage of Cumulative Losses 0.00 0.00 Prepayment Penalties 0.00 0.00 Special Servicing Fee 0.00 0.00 Pass-Through Rate 8.565542 9.146843

Filing Compare · STRUCTURED ASSET SECURITIES CORP MOR PAS THR CER SR 2001-BC4