8-K 1 arc01bc4.txt OCTOBER 8K 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 25, 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 October 25, 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 October 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. 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: 11/2/01 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 October 25, 2001 distribution. EX-99.1

Amortizing Residential Collateral Mortgage Trust Mortgage Pass-Through Certificates Record Date: 89/3130/01 Distribution Date: 910/25/01 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 32.~~69000~~77125% ~~317~~310,~~779~~987,~~023~~185.5317 ~~944~~718,~~598~~186.1403 62,~~791~~931,~~838~~380.3639 A-2 86358RCZ8 SEQ 32.~~84000~~92125% 9895,~~094~~720,~~297~~915.6781 ~~303~~233,~~438~~020.3660 21,~~373~~583,~~381~~888.8633 A-IO 86358RDA2 IO 6.00000% 0.00 632,591.0910 0.00 M-1 86358RDB0 SEQ 43.~~17000~~25125% 14,058,000.00 4738,~~223~~088.1639 0.00 M-2 86358RDC8 SEQ 43.~~58000~~66125% 9,372,000.00 3428,~~577~~594.4736 0.00 B 86358RDD6 SEQ 54.~~48000~~56125% 5,858,000.00 2522,~~859~~266.8250 0.00 X ARC01001X SEQ 0.00000% 0.00 1,~~377~~622,~~388~~518.8751 0.00 P ARC01001P SEQ 0.00000% 0.00 ~~203~~88,~~492~~144.6537 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 ~~445~~435,~~161~~996,~~321~~100.2098 3,~~569~~383,~~169~~409.5686 94,~~165~~515,~~220~~268.2272

Certificateholder Distribution Summary (continued) Current Ending Cumulative Realized Certificate Total Realized Class Loss Balance Distribution Losses A-1 0.00 ~~310~~308,~~987~~055,~~185~~804.1778 73,~~736~~649,~~436~~566.5042 0.00 A-2 0.00 9594,~~720~~137,~~915~~027.8148 21,~~676~~816,~~820~~908.2293 0.00 A-IO 0.00 0.00 632,591.0910 0.00 M-1 0.00 14,058,000.00 4738,~~223~~088.1639 0.00 M-2 0.00 9,372,000.00 3428,~~577~~594.4736 0.00 B 0.00 5,858,000.00 2522,~~859~~266.8250 0.00 X 0.00 0.00 1,~~377~~622,~~388~~518.8751 0.00 P 0.00 0.00 ~~203~~88,~~492~~144.6537 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 ~~435~~431,~~996~~480,~~100~~832.9826 127,~~734~~898,~~389~~678.7858 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 ~~317~~310,~~779~~987,~~023~~185.5317 0.00 62,~~791~~931,~~838~~380.3639 0.00 0.00 A-2 104,312,000.00 9895,~~094~~720,~~297~~915.6781 0.00 21,~~373~~583,~~381~~888.8633 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 ~~445~~435,~~161~~996,~~321~~100.2098 0.00 94,~~165~~515,~~220~~268.2272 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 62,~~791~~931,~~838~~380.3639 ~~310~~308,~~987~~055,~~185~~804.1778 0.~~92835875~~91960800 62,~~791~~931,~~838~~380.3639 A-2 21,~~373~~583,~~381~~888.8633 9594,~~720~~137,~~915~~027.8148 0.~~91764050~~90245636 21,~~373~~583,~~381~~888.8633 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 94,~~165~~515,~~220~~268.2272 ~~435~~431,~~996~~480,~~100~~832.9826 0.~~93044891~~92081298 94,~~165~~515,~~220~~268.2272

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 ~~948~~928.~~63374448~~35875281 0.00000000 208.~~27499167~~75075493 0.00000000 A-2 104,312,000.00 ~~940~~917.~~39322101~~64049975 0.00000000 2215.~~75272126~~18414305 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 208.~~27499167~~75075493 ~~928~~919.~~35875281~~60799789 0.~~92835875~~91960800 208.~~27499167~~75075493 A-2 0.00000000 2215.~~75272126~~18414305 ~~917~~902.~~64049975~~45635670 0.~~91764050~~90245636 2215.~~75272126~~18414305 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 32.~~69000~~77125% ~~317~~310,~~779~~987,~~023~~185.5317 ~~944~~718,~~598~~186.1503 0.00 0.00 A-2 104,312,000.00 32.~~84000~~92125% 9895,~~094~~720,~~297~~915.6781 ~~303~~233,~~438~~020.3660 0.00 0.00 A-IO 0.00 6.00000% 126,518,220.00 632,591.10 0.00 0.00 M-1 14,058,000.00 43.~~17000~~25125% 14,058,000.00 4738,~~223~~088.1639 0.00 0.00 M-2 9,372,000.00 43.~~58000~~66125% 9,372,000.00 3428,~~577~~594.4736 0.00 0.00 B 5,858,000.00 54.~~48000~~56125% 5,858,000.00 2522,~~859~~266.8250 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,~~988~~672,~~288~~746.0698 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 ~~944~~718,~~598~~186.1403 0.00 ~~310~~308,~~987~~055,~~185~~804.1778 A-2 0.00 0.00 ~~303~~233,~~438~~020.3660 0.00 9594,~~720~~137,~~915~~027.8148 A-IO 0.00 0.00 632,591.0910 0.00 126,518,220.00 M-1 0.00 0.00 4738,~~223~~088.1639 0.00 14,058,000.00 M-2 0.00 0.00 3428,~~577~~594.4736 0.00 9,372,000.00 B 0.00 0.00 2522,~~859~~266.8250 0.00 5,858,000.00 X 0.00 0.00 1,~~377~~622,~~388~~518.8751 0.00 0.00 P 0.00 0.00 ~~203~~88,~~492~~144.6537 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,~~569~~383,~~169~~409.5686 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 32.~~69000~~77125% ~~948~~928.~~63374448~~35875281 2.~~81981381~~14392849 0.00000000 0.00000000 A-2 104,312,000.00 32.~~84000~~92125% ~~940~~917.~~39322101~~64049975 2.~~90894969~~23388105 0.00000000 0.00000000 A-IO 0.00 6.00000% 1000.00000000 5.00000000 0.00000000 0.00000000 M-1 14,058,000.00 43.~~17000~~25125% 1000.00000000 32.~~35916631~~70937473 0.00000000 0.00000000 M-2 9,372,000.00 43.~~58000~~66125% 1000.00000000 3.~~68944409~~05104140 0.00000000 0.00000000 B 5,858,000.00 54.~~48000~~56125% 1000.00000000 43.~~41444520~~80104131 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 2.~~81981378~~14392849 0.00000000 ~~928~~919.~~35875281~~60799789 A-2 0.00000000 0.00000000 2.~~90894969~~23388105 0.00000000 ~~917~~902.~~64049975~~45635670 A-IO 0.00000000 0.00000000 45.~~99999992~~00000000 0.00000000 1000.00000000 M-1 0.00000000 0.00000000 32.~~35916631~~70937473 0.00000000 1000.00000000 M-2 0.00000000 0.00000000 3.~~68944409~~05104140 0.00000000 1000.00000000 B 0.00000000 0.00000000 43.~~41444520~~80104131 0.00000000 1000.00000000 X 0.00000000 0.00000000 ~~1666875~~1963523.~~06202123~~66487965 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 ACCOUNT STATEMENT CERTIFICATE ACCOUNT Beginning Balance 0.00 Deposits Payments of Interest and Principal 138,~~306~~369,~~194~~958.6967 Liquidations, Insurance Proceeds, Reserve Funds 0.00 Proceeds from Repurchased Loans 0.00 Other Amounts (Servicer Advances) 0.00 Realized Losses 0.00 Prepayment Penalties 088,144.0037 Total Deposits 138,~~306~~458,~~194~~103.6904 Withdrawals Reimbursement for Servicer Advances 0.00 Payment of Service Fee ~~571~~559,~~804~~424.9146 Payment of Interest and Principal 127,~~734~~898,~~389~~678.7858 Total Withdrawals (Pool Distribution Amount) 138,~~306~~458,~~194~~103.6904 Ending Balance 0.00

SERVICING FEES Gross Servicing Fee ~~185~~181,~~351~~665.7617 Guarantee Fee 2423,~~627~~324.8704 Loss Mitigation Advisors Fee 5,~~564~~449.5295 MGIC Insurance Premiums ~~355~~348,~~333~~076.3899 Special Servicing Fee 0.00 Wells Fargo Bank, N.A. ~~927~~908.3831 Supported Prepayment/Curtailment Interest Shortfall 0.00 Net Servicing Fee ~~571~~559,~~804~~424.9146

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 022 0 0 022 02,324,902.0011 0.00 0.00 02,324,902.0011 30 Days 92102 03 0 0 92105 1112,~~293~~259,~~752~~533.0833 0207,962.0026 0.00 0.00 1112,~~293~~467,~~752~~495.0859 60 Days ~~187~~55 05 02 0 ~~187~~62 197,~~632~~384,~~411~~713.7557 0633,227.0028 0216,011.0075 0.00 198,~~632~~233,~~411~~952.7560 90 Days 426 022 0122 0 4 ~~365~~174 2,~~167~~904,815.4412 02,669,020.0064 011,804,376.0070 0515,938.0023 ~~365~~17,~~167~~894,150.4469 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 ~~283~~183 052 0124 04 ~~283~~363 3122,~~291~~549,~~331~~062.2702 05,835,112.0029 012,020,388.0045 0515,938.0023 3140,~~291~~920,~~331~~500.2799 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~~661654% 0.000000% 0.000000% 0.~~000000~~661654% 0.~~000000~~538819% 0.000000% 0.000000% 0.~~000000~~538819% 30 Days 23.~~742176~~067669% 0.~~000000~~090226% 0.000000% 0.000000% 23.~~742176~~157895% 2.~~590333~~841270% 0.~~000000~~048197% 0.000000% 0.000000% 2.~~590333~~889467% 60 Days 51.~~573770~~654135% 0.~~000000~~150376% 0.~~000000~~060150% 0.000000% 51.~~573770~~864662% 41.~~502887~~711481% 0.~~000000~~146757% 0.~~000000~~050063% 0.000000% 41.~~502887~~908301% 90 Days 0.~~119225~~781955% 0.~~000000~~661654% 03.~~000000~~669173% 0.~~000000~~120301% 05.~~119225~~233083% 0.~~083755~~673220% 0.~~000000~~618572% 02.~~000000~~735782% 0.~~000000~~119574% 04.~~083755~~147148% 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 85.~~435171~~503759% 01.~~000000~~563910% 03.~~000000~~729323% 0.~~000000~~120301% 810.~~435171~~917293% 75.~~176975~~225971% 01.~~000000~~352346% 02.~~000000~~785845% 0.~~000000~~119574% 79.~~176975~~483736% 7) Delinquencies include wrapped and unwrapped loans.

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 0 0 0 0 0.00 0.00 0.00 0.00 30 Days 9 0 0 0 9 589,030.71 0.00 0.00 0.00 589,030.71 60 Days 17 0 0 0 17 1,242,938.50 0.00 0.00 0.00 1,242,938.50 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 26 0 0 0 26 1,831,969.21 0.00 0.00 0.00 1,831,969.21 0-29 Days 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 30 Days 2.727273% 0.000000% 0.000000% 0.000000% 2.727273% 2.249692% 0.000000% 0.000000% 0.000000% 2.249692% 60 Days 5.151515% 0.000000% 0.000000% 0.000000% 5.151515% 4.747171% 0.000000% 0.000000% 0.000000% 4.747171% 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 7.878788% 0.000000% 0.000000% 0.000000% 7.878788% 6.996863% 0.000000% 0.000000% 0.000000% 6.996863% 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 0 0 0 0 0.00 0.00 0.00 0.00 30 Days 74 0 0 0 74 7,794,599.45 0.00 0.00 0.00 7,794,599.45 60 Days 116 0 0 0 116 10,567,788.49 0.00 0.00 0.00 10,567,788.49 90 Days 4 0 0 0 4 365,167.44 0.00 0.00 0.00 365,167.44 120 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 194 0 0 0 194 18,727,555.38 0.00 0.00 0.00 18,727,555.38 0-29 Days 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 30 Days 2.754001% 0.000000% 0.000000% 0.000000% 2.754001% 2.537815% 0.000000% 0.000000% 0.000000% 2.537815% 60 Days 4.317082% 0.000000% 0.000000% 0.000000% 4.317082% 3.440728% 0.000000% 0.000000% 0.000000% 3.440728% 90 Days 0.148865% 0.000000% 0.000000% 0.000000% 0.148865% 0.118894% 0.000000% 0.000000% 0.000000% 0.118894% 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 7.219948% 0.000000% 0.000000% 0.000000% 7.219948% 6.097437% 0.000000% 0.000000% 0.000000% 6.097437% 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 1 0 0 0 1 360,415.44 0.00 0.00 0.00 360,415.44 60 Days 9 0 0 0 9 683,405.92 0.00 0.00 0.00 683,405.92 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 10 0 0 0 10 1,043,821.36 0.00 0.00 0.00 1,043,821.36 0-29 Days 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 30 Days 2.777778% 0.000000% 0.000000% 0.000000% 2.777778% 5.801927% 0.000000% 0.000000% 0.000000% 5.801927% 60 Days 25.000000% 0.000000% 0.000000% 0.000000% 25.000000% 11.001392% 0.000000% 0.000000% 0.000000% 11.001392% 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 27.777778% 0.000000% 0.000000% 0.000000% 27.777778% 16.803319% 0.000000% 0.000000% 0.000000% 16.803319% 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 0 0 0 0 0.00 0.00 0.00 0.00 30 Days 8 0 0 0 8 2,549,706.48 0.00 0.00 0.00 2,549,706.48 60 Days 45 0 0 0 45 7,138,278.84 0.00 0.00 0.00 7,138,278.84 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 53 0 0 0 53 9,687,985.32 0.00 0.00 0.00 9,687,985.32 0-29 Days 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 30 Days 2.649007% 0.000000% 0.000000% 0.000000% 2.649007% 2.643190% 0.000000% 0.000000% 0.000000% 2.643190% 60 Days 14.900662% 0.000000% 0.000000% 0.000000% 14.900662% 7.400000% 0.000000% 0.000000% 0.000000% 7.400000% 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 17.549669% 0.000000% 0.000000% 0.000000% 17.549669% 10.043190% 0.000000% 0.000000% 0.000000% 10.043190%

COLLATERAL STATEMENT Collateral Description Fixed & Mixed ARM Weighted Average Gross Coupon 10.~~614081~~609333% Weighted Average Net Coupon 9.~~156582~~151314% Weighted Average Pass-Through Rate 9.~~154083~~148814% Weighted Average Maturity(Stepdown Calculation ) ~~350~~349 Beginning Scheduled Collateral Loan Count 3,~~422~~355 Number Of Loans Paid In Full 6730 Ending Scheduled Collateral Loan Count 3,~~355~~325 Beginning Scheduled Collateral Balance ~~445~~435,~~161~~996,~~321~~100.2098 Ending Scheduled Collateral Balance ~~435~~431,~~996~~480,~~100~~832.9826 Ending Actual Collateral Balance at 3130-~~Aug~~Sep-2001 ~~435~~431,~~996~~480,~~100~~832.9826 Monthly P &I Constant 4,~~133~~052,~~238~~302.7213 Special Servicing Fee 0.00 Prepayment Penalties 088,144.0037 Realized Loss Amount 0.00 Cumulative Realized Loss 0.00 Ending Scheduled Balance for Premium Loans ~~435~~431,~~996~~480,~~100~~832.9826 Scheduled Principal 197,612.24 Unscheduled Principal 4,317,656.48 Extra principal distribution Amount 0.00 Excess Cash Amount 1,~~402~~645,~~016~~842.7455

~~Prepayment Penalties $203,492.65~~ Cumulative Guarantee Fee $81104,~~051~~375.5458

Group Level Collateral Statement Group 1 2 3 Collateral Description Fixed 15/30 & ARM Fixed 15/30 & ARM Fixed 15/30 & ARM ~~Collateral~~Weighted ~~Description~~Average Coupon Rate 11.~~303742~~313983 10.~~736852~~730904 10.~~366860~~370069 Weighted Average ~~Coupon~~Net Rate 9.~~885249~~901485 9.~~274844~~270236 9.~~033874~~040456 Weighted Average ~~Net Rate 348 348 350 Weighted Average~~ Maturity ~~337~~347 ~~2,739~~347 37349 Beginning Loan Count 7330 522,687 136 Loans Paid In Full ~~330~~3 ~~2,687~~23 361 Ending Loan Count ~~26,814,580.65~~327 ~~313~~2,~~298,139.25~~664 ~~6,252,237.40~~35 Beginning Scheduled Balance 26,182,722.14 307,138,159.40 6,211,995.05 Ending ~~scheduled~~Scheduled Balance 0825,933,762.60 304,455,738.55 5,859,644.35 Record Date 09/3130/2001 0809/3130/2001 0809/3130/2001 ~~Record~~Principal ~~Date~~And ~~267~~Interest Constant 261,~~383~~827.4741 2,~~934~~879,~~561~~187.9623 56,~~984~~679.5443 Scheduled Principal ~~Principal And Interest Constant~~ 14,~~795~~968.8834 ~~131~~132,~~365~~628.5793 2,~~971~~997.1508 Unscheduled Principal ~~617~~233,~~062~~991.6320 62,~~028~~549,~~614~~791.2892 37349,~~271~~353.2062 Scheduled Interest ~~252~~246,~~587~~859.5907 2,~~803~~746,~~196~~558.3930 5453,~~013~~682.3935 Servicing Fees 3130,~~641~~819.0321 ~~381~~373,~~050~~855.8660 6,~~932~~882.0796 Master Servicing Fees 0.00 0.00 0.00 Trustee Fee 5554.8556 ~~652~~639.6985 1312.0193 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 ~~220~~215,~~890~~985.7130 2,~~421~~372,~~492~~062.8485 4746,~~068~~786.3146 Realized Loss Amount 0.00 0.00 0.00 Cumulative Realized ~~LossPercentage~~Loss 0.00 0.00 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 0Pass-Through Rate 9.00898985 09.00267736 09.00037952

Group Level Collateral Statement 4 Total Group Fixed 15/30 & ARM Fixed & Mixed ARM Collateral Description 10.~~053220~~046401 10.~~614081~~609333 Weighted Average Coupon Rate 8.~~580286~~576191 9.~~156582~~151314 Weighted Average Net Rate ~~350~~349 ~~350~~349 Weighted Average Maturity ~~309~~302 3,~~422~~355 Beginning Loan Count 73 6730 Loans Paid In Full ~~302~~299 3,~~355~~325 Ending Loan Count 9896,~~796~~463,~~363~~224.9039 ~~445~~435,~~161~~996,~~321~~100.2098 Beginning Scheduled Balance 9695,~~463~~231,~~224~~686.3976 ~~435~~431,~~996~~480,~~100~~832.9826 Ending Scheduled Balance 0809/3130/2001 0809/3130/2001 Record Date ~~874~~854,~~308~~608.7506 4,~~133~~052,~~238~~302.7213 Principal And Interest Constant 4647,~~624~~017.1189 ~~195~~197,~~756~~612.7124 Scheduled Principal 21,~~286~~184,~~515~~519.4074 84,~~969~~317,~~463~~656.5148 Unscheduled Principal ~~827~~807,~~684~~590.6417 3,~~937~~854,~~482~~689.0189 Scheduled Interest ~~121~~118,~~061~~184.2530 ~~540~~529,~~685~~742.2107 Servicing Fees 0.00 0.00 Master Servicing Fees ~~205~~200.8397 ~~927~~908.3831 Trustee FeeFRY 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 ~~706~~689,~~417~~204.5690 3,~~395~~324,~~869~~039.4251 Realized Loss Amount 0.00 0.00 Cumulative Realized Loss 0.00 0.00 Percentage of Cumulative Losses 0.00 0.00 Prepayment Penalties 0.00 0.00 Special Servicing Fee 0.00 0.00 Pass-Through Rate 8.573691 9.148814

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